1. CORS Support

1.1. Why do I need CORS support?

By default, many browsers implement a same origin policy which prevents making requests to a resource, on an origin that’s different from the source origin.

For example, a request originating from a page served from http://www.opennms.org to a resource on http://www.adventuresinoss.com would be considered a cross origin request.

CORS (Cross Origin Resource Sharing) is a standard mechanism used to enable cross origin requests.

For further details, see:

1.2. How can I enable CORS support?

CORS support for the REST interface (or any other part of the Web UI) can be enabled as follows:

  1. Open '$OPENNMS_HOME/jetty-webapps/opennms/WEB-INF/web.xml' for editing.

  2. Apply the CORS filter to the '/rest/' path by removing the comments around the <filter-mapping> definition. The result should look like:

      <!-- Uncomment this to enable CORS support -->
  <filter-mapping>
    <filter-name>CORS Filter</filter-name>
    <url-pattern>/rest/*</url-pattern>
  </filter-mapping>

  3. Restart OpenNMS Horizon

1.3. How can I configure CORS support?

CORS support is provided by the org.ebaysf.web.cors.CORSFilter servlet filter.

Parameters can be configured by modifying the filter definition in the 'web.xml' file referenced above.

By default, the allowed origins parameter is set to '*'.

The complete list of parameters supported are available from:

2. ReST API

A RESTful interface is a web service conforming to the REST architectural style as described in the book RESTful Web Services. This page is describes the RESTful interface for OpenNMS Horizon.

2.1. ReST URL

The base URL for Rest Calls is: http://opennmsserver:8980/opennms/rest/

For instance, http://localhost:8980/opennms/rest/alarms/ will give you the current alarms in the system.

2.2. Authentication

Use HTTP Basic authentication to provide a valid username and password. By default you will not receive a challenge, so you must configure your ReST client library to send basic authentication proactively.

2.3. Data format

Jersey allows ReST calls to be made using either XML or JSON. By default a request to the API is returned in XML. XML is delivered without namespaces. Please note: If a namespace is added manually in order to use a XML tool to validate against the XSD (like xmllint) it won’t be preserved when OpenNMS updates that file. The same applies to comments. To get JSON encoded responses one has to send the following header with the request: Accept: application/json.

2.4. Standard Parameters

The following are standard params which are available on most resources (noted below)

Table 1. ReST standard parameter for resources
Parameter Description

limit

integer, limiting the number of results. This is particularly handy on events and notifications, where an accidental call with no limit could result in many thousands of results being returned, killing either the client or the server. If set to 0, then no limit applied

offset

integer, being the numeric offset into the result set from which results should start being returned. E.g., if there are 100 result entries, offset is 15, and limit is 10, then entries 15-24 will be returned. Used for pagination

Filtering: All properties of the entity being accessed can be specified as parameters in either the URL (for GET) or the form value (for PUT and POST). If so, the value will be used to add a filter to the result. By default, the operation is equality, unless the comparator parameter is sent, in which case it applies to all comparisons in the filter. Multiple properties will result in an AND operation between the filter elements. Available comparators are:

eq

Checks for equality

ne

Checks for non-equality

ilike

Case-insensitive wildcarding (% is the wildcard)

like

Case-sensitive wildcarding (% is the wildcard)

gt

Greater than

lt

Less than

ge

Greater than or equal

le

Less than or equal

If the value null is passed for a given property, then the obvious operation will occur (comparator will be ignored for that property). notnull is handled similarly.

  • Ordering: If the parameter orderBy is specified, results will be ordered by the named property. Default is ascending, unless the order parameter is set to desc (any other value will default to ascending)

2.5. Standard filter examples

Take /events as an example.

Resource Description

/events?eventUei=uei.opennms.org/internal/rtc/subscribe

would return the first 10 events with the rtc subscribe UEI, (10 being the default limit for events)

/events?eventUei=uei.opennms.org/internal/rtc/subscribe&limit=0

would return all the rtc subscribe events (potentially quite a few)

/events?id=100&comparator=gt

would return the first 10 events with an id greater than 100

/events?eventAckTime=notnull

would return the first 10 events that have a non-null Ack time (i.e. those that have been acknowledged)

/events?eventAckTime=notnull&id=100&comparator=gt&limit=20

would return the first 20 events that have a non-null Ack time and an id greater than 100. Note that the notnull value causes the comparator to be ignored for eventAckTime

/events?eventAckTime=2008-07-28T04:41:30.530%2B12:00&id=100&comparator=gt&limit=20

would return the first 20 events that have were acknowledged after 28th July 2008 at 4:41am (+12:00), and an id greater than 100. Note that the same comparator applies to both property comparisons. Also note that you must URL encode the plus sign when using GET.

/events?orderBy=id&order=desc

would return the 10 latest events inserted (probably, unless you’ve been messing with the id’s)

2.6. HTTP Return Codes

The following apply for OpenNMS Horizon 18 and newer.

  • All the DELETE requests are going to return a 204 (NO_CONTENT) on success.

  • All the PUT requests are going to return a 204 (NO_CONTENT) on success.

  • All the POST requests that can either add or update an entity are going to return a 204 (NO_CONTENT) on success.

  • All the POST associated to resource addition are going to return a 201 (CREATED) on success.

  • All the POST requests where it is required to return an object will return a 200 (OK).

  • All the requests excepts GET for the Requisitions end-point and the Foreign Sources Definitions end-point will return 202 (ACCEPTED). This is because all the requests are actually executed asynchronously and there is no way to know the status of the execution, or wait until the processing is done.

  • If a resource is not modified during a PUT request, a NOT_MODIFIED will be returned. A NO_CONTENT will be returned only on a success operation.

  • All GET requests are going to return 200 (OK) on success.

  • All GET requests are going to return 404 (NOT_FOUND) when a single resource doesn’t exist; but will return 400 (BAD_REQUEST), if an intermediate resource doesn’t exist. For example, if a specific IP doesn’t exist on a valid node, return 404. But, if the IP is valid and the node is not valid, because the node is an intermediate resource, a 400 will be returned.

  • If something not expected is received from the Service/DAO Layer when processing any HTTP request, like an exception, a 500 (INTERNAL_SERVER_ERROR) will be returned.

  • Any problem related with the incoming parameters, like validations, will generate a 400 (BAD_REQUEST).

2.7. Identifying Resources

Some endpoints deal in resources, which are identified by Resource IDs. Since every resource is ultimately parented under some node, identifying the node which contains a resource is the first step in constructing a resource ID. Two styles are available for identifying the node in a resource ID:

Style Description Example

node[ID]

Identifies a node by its database ID, which is always an integer

node[42]

node[FS:FID]

Identifies a node by its foreign-source name and foreign-ID, joined by a single colon

node[Servers:115da833-0957-4471-b496-a731928c27dd]

The node identifier is followed by a period, then a resource-type name and instance name. The instance name’s characteristics may vary from one resource-type to the next. A few examples:

Value Description

nodeSnmp[]

Node-level (scalar) performance data for the node in question. This type is the only one where the instance identifier is empty.

interfaceSnmp[eth0-04013f75f101]

A layer-two interface as represented by a row in the SNMP ifTable. The instance identifier is composed of the interface’s ifName and its ifPhysAddress (if it has one).

dskIndex[_root_fs]

The root filesystem of a node running the Net-SNMP management agent.

Putting it all together, here are a few well-formed resource IDs:

  • node[1].nodeSnmp[]

  • node[42].interfaceSnmp[eth0-04013f75f101]

  • node[Servers:115da833-0957-4471-b496-a731928c27dd].dskIndex[_root_fs]

2.8. Currently Implemented Interfaces

2.8.1. Acknowledgements

the default offset is 0, the default limit is 10 results. To get all results, use limit=0 as a parameter on the URL (ie, GET /acks?limit=0).
GETs (Reading Data)
Resource Description

/acks

Get a list of acknowledgements.

/acks/count

Get the number of acknowledgements. (Returns plaintext, rather than XML or JSON.)

/acks/{id}

Get the acknowledgement specified by the given ID.
POSTs (Setting Data)
Resource Description

/acks

Creates or modifies an acknowledgement for the given alarm ID or notification ID. To affect an alarm, set an alarmId< parameter in the URL-encoded POST body; to affect a notification, set notifyId instead. An action parameter is also required, and may be one of ack, unack, clear, or esc (escalate).
Usage examples with curl
Acknowledge notification #3
curl -u 'admin:admin' -X POST -d notifId=3 -d action=ack http://localhost:8980/opennms/rest/acks
Escalate alarm #42
curl -u 'admin:admin' -X POST -d alarmId=42 -d action=esc http://localhost:8980/opennms/rest/acks

2.8.2. Alarm Statistics

It is possible to get some basic statistics on alarms, including the number of acknowledged alarms, total alarms, and the newest and oldest of acknowledged and unacknowledged alarms.

GETs (Reading Data)
Resource Description

/stats/alarms

Returns statistics related to alarms. Accepts the same Hibernate parameters that you can pass to the /alarms ReST service.

/stats/alarms/by-severity

Returns the statistics related to alarms, one per severity. You can optionally pass a list of severities to the severities query parameter to limit it to the specified severities. (eg, GET /opennms/rest/stats/alarms/by-severity?severities=MAJOR,CRITICAL).

2.8.3. Alarms

the default offset is 0, the default limit is 10 results. To get all results, use limit=0 as a parameter on the URL (ie, GET /events?limit=0).
GETs (Reading Data)
Resource Description

/alarms

Get a list of alarms.

/alarms/count

Get the number of alarms. (Returns plaintext, rather than XML or JSON.)

/alarms/{id}

Get the alarms specified by the given ID.

Note that you can also query by severity, like so:

Resource Description

/alarms?comparator=ge&severity=MINOR

Get the alarms with a severity greater than or equal to MINOR.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

Resource Description

/alarms/{id}?ack=''(true;false)''

Acknowledges (or unacknowledges) an alarm.

/alarms?x=y&…​&ack=''(true;false)''

Acknowledges (or unacknowledges) alarms matching the additional query parameters. eg, /alarms?node.id=4&ack=true
New in OpenNMS 1.11.0

In OpenNMS 1.11.0, some additional features are supported in the alarm ack API:

Resource Description

/alarms/{id}?clear=true

Clears an alarm.

/alarms/{id}?escalate=true

Escalates an alarm. eg, NORMAL → MINOR, MAJOR → CRITICAL, etc.

/alarms?x=y&…​&clear=true

Clears alarms matching the additional query parameters.

/alarms?x=y&…​&escalate=true

Escalates alarms matching the additional query parameters.

Additionally, when acknowledging alarms (ack=true) you can now specify an ackUser parameter. You will only be allowed to ack as a different user IF you are PUTting as an authenticated user who is in the admin role.

2.8.4. Events

GETs (Reading Data)
Resource Description

/events

Get a list of events. The default for offset is 0, and the default for limit is 10. To get all results, use limit=0 as a parameter on the URL (ie, GET /events?limit=0).

/events/count

Get the number of events. (Returns plaintext, rather than XML or JSON.)

/events/{id}

Get the event specified by the given ID.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

Resource Description

/events/{id}?ack=''(true;false)

Acknowledges (or unacknowledges) an event.

/events?x=y&…​&ack=''(true;false)

Acknowledges (or unacknowledges) the matching events.
POSTs (Adding Data)

POST requires XML (application/xml) or JSON (application/json) as its Content-Type.

See ${OPENNMS_HOME}/share/xsds/event.xsd for the reference schema.
Resource Description

/events

Publish an event on the event bus.

2.8.5. Categories

GETs (Reading Data)
Resource Description

/categories

Get all configured categories.

/categories/{category}

Get the category specified by the given name.

/categories/{category}/nodes/{node}

Get the category specified by the given name for the given node (similar to /nodes/{node}/categories/{category})

/categories/nodes/{node}

Get the categories for a given node (similar to /nodes/{node}/categories)

/categories/groups/{group}

Get the categories for a given user group (similar to /groups/{group}/categories)
POSTs (Adding Data)
Resource Description

/categories

Adds a new category.
PUTs (Modifying Data)
Resource Description

/categories/{category}

Update the specified category

/categories/{category}/nodes/{node}

Modify the category with the given node ID and name (similar to /nodes/{node}/categories/{category})

/categories/{category}/groups/{group}

Add the given category to the given user group (similar to /groups/{group}/categories/{category})
DELETEs (Removing Data)
Resource Description

/categories/{category}

Delete the specified category

/categories/{category}/nodes/{node}

Remove the given category from the given node (similar to /nodes/{node}/categories/{category})

/categories/{category}/groups/{group}

Remove the given category from the given user group (similar to /groups/{group}/categories/{category})

2.8.6. Foreign Sources

ReSTful service to the OpenNMS Horizon Provisioning Foreign Source definitions. Foreign source definitions are used to control the scanning (service detection) of services for SLA monitoring as well as the data collection settings for physical interfaces (resources).

This API supports CRUD operations for managing the Provisioner’s foreign source definitions. Foreign source definitions are POSTed and will be deployed when the corresponding requisition gets imported/synchronized by Provisiond.

If a request says that it gets the "active" foreign source, that means it returns the pending foreign source (being edited for deployment) if there is one, otherwise it returns the deployed foreign source.

GETs (Reading Data)
Resource Description

/foreignSources

Get all active foreign sources.

/foreignSources/default

Get the active default foreign source.

/foreignSources/deployed

Get the list of all deployed (active) foreign sources.

/foreignSources/deployed/count

Get the number of deployed foreign sources. (Returns plaintext, rather than XML or JSON.)

/foreignSources/{name}

Get the active foreign source named {name}.

/foreignSources/{name}/detectors

Get the configured detectors for the foreign source named {name}.

/foreignSources/{name}/detectors/{detector}

Get the specified detector for the foreign source named {name}.

/foreignSources/{name}/policies

Get the configured policies for the foreign source named {name}.

/foreignSources/{name}/policies/{policy}

Get the specified policy for the foreign source named {name}.
POSTs (Adding Data)

POST requires XML using application/xml as its Content-Type.

Resource Description

/foreignSources

Add a foreign source.

/foreignSources/{name}/detectors

Add a detector to the named foreign source.

/foreignSources/{name}/policies

Add a policy to the named foreign source.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

Resource Description

/foreignSources/{name}

Modify a foreign source with the given name.
DELETEs (Removing Data)
Resource Description

/foreignSources/{name}

Delete the named foreign source.

/foreignSources/{name}/detectors/{detector}

Delete the specified detector from the named foreign source.

/foreignSources/{name}/policies/{policy}

Delete the specified policy from the named foreign source.

2.8.7. Groups

Like users, groups have a simplified interface as well.

GETs (Reading Data)
Resource Description

/groups

Get a list of groups.

/groups/{groupname}

Get a specific group, given a group name.

/groups/{groupname}/users

Get the users for a group, given a group name. (new in OpenNMS 14)

/groups/{groupname}/categories

Get the categories associated with a group, given a group name. (new in OpenNMS 14)
POSTs (Adding Data)
Resource Description

/groups

Add a new group.
PUTs (Modifying Data)
Resource Description

/groups/{groupname}

Update the metadata of a group (eg, change the comments field).

/groups/{groupname}/users/{username}

Add a user to the group, given a group name and username. (new in OpenNMS 14)

/groups/{groupname}/categories/{categoryname}

Associate a category with the group, given a group name and category name. (new in OpenNMS 14)
DELETEs (Removing Data)
Resource Description

/groups/{groupname}

Delete a group.

/groups/{groupname}/users/{username}

Remove a user from the group. (new in OpenNMS 14)

/groups/{groupname}/categories/{categoryname}

Disassociate a category from a group, given a group name and category name. (new in OpenNMS 14)

2.8.8. Heatmap

GETs (Reading Data)
Resource Description

/heatmap/outages/categories

Sizes and color codes based on outages for nodes grouped by Surveillance Categories

/heatmap/outages/foreignSources

Sizes and color codes based on outages for nodes grouped by Foreign Source

/heatmap/outages/monitoredServices

Sizes and color codes based on outages for nodes grouped by monitored services

/heatmap/outages/nodesByCategory/{category}

Sizes and color codes based on outages for nodes associated with a specific Surveillance Category

/heatmap/outages/nodesByForeignSource/{foreignSource}

Sizes and color codes based on outages for nodes associated with a specific Foreign Source

/heatmap/outages/nodesByMonitoredService/{monitoredService}

Sizes and color codes based on outages for nodes providing a specific monitored service
Resource Description

/heatmap/alarms/categories

Sizes and color codes based on alarms for nodes grouped by Surveillance Categories

/heatmap/alarms/foreignSources

Sizes and color codes based on alarms for nodes grouped by Foreign Source

/heatmap/alarms/monitoredServices

Sizes and color codes based on alarms for nodes grouped by monitored services

/heatmap/alarms/nodesByCategory/{category}

Sizes and color codes based on alarms for nodes associated with a specific Surveillance Category

/heatmap/alarms/nodesByForeignSource/{foreignSource}

Sizes and color codes based on alarms for nodes associated with a specific Foreign Source

/heatmap/alarms/nodesByMonitoredService/{monitoredService}

Sizes and color codes based on alarms for nodes providing a specific monitored service

2.8.9. Categories

Obtain or modify the status of a set of monitored services based on a given search criteria, based on nodes, IP interfaces, Categories, or monitored services itself.

Examples:

  • /ifservices?node.label=onms-prd-01

  • /ifservices?ipInterface.ipAddress=192.168.32.140

  • /ifservices?category.name=Production

  • /ifservices?status=A

GETs (Reading Data)
Resource Description

/ifservices

Get all configured monitored services for the given search criteria.

Example:

Get the forced unmanaged services for the nodes that belong to the requisition named Servers:

curl -u admin:admin "http://localhost:8980/opennms/rest/ifservices?status=F&node.foreignSource=Servers"
PUTs (Modifying Data)
Resource Description

/ifservices/

Update all configured monitored services for the given search criteria.

Example:

Mark the ICMP and HTTP services to be forced unmanaged for the nodes that belong to the category Production:

curl -u admin:admin -X PUT "status=F&services=ICMP,HTTP" "http://localhost:8980/opennms/rest/ifservices?category.name=Production"

2.8.10. KSC Reports

GETs (Reading Data)
Resource Description

/ksc

Get a list of all KSC reports, this includes ID and label.

/ksc/{reportId}

Get a specific KSC report, by ID.

/ksc/count

Get a count of all KSC reports.
PUTs (Modifying Data)
Resource Description

/ksc/{reportId}

Modify a report with the given ID.
POSTs (Creating Data)

Documentation incomplete see issue: NMS-7162

DELETEs (Removing Data)

Documentation incomplete see issue: NMS-7162

2.8.11. Maps

The SVG maps use ReST to populate their data. This is the interface for doing that.

GETs (Reading Data)
Resource Description

/maps

Get the list of maps.

/maps/{id}

Get the map with the given ID.

/maps/{id}/mapElements

Get the elements (nodes, links, etc.) for the map with the given ID.
POSTs (Adding Data)
Resource Description

/maps

Add a map.
PUTs (Modifying Data)
Resource Description

/maps/{id}

Update the properties of the map with the given ID.
DELETEs (Removing Data)
Resource Description

/maps/{id}

Delete the map with the given ID.

2.8.12. Measurements API

The Measurements API can be used to retrieve collected values stored in RRD (or JRB) files and in Newts.

Unless specific otherwise, all unit of time are expressed in milliseconds.
GETs (Reading Data)
Resource Description

/measurements/{resourceId}/{attribute}

Retrieve the measurements for a single attribute

The following table shows all supported query string parameters and their default values.

name default comment

start

-14400000

Timestamp in milliseconds.

If > 0, the timestamp is relative to the UNIX epoch (January 1st 1970 00:00:00 AM).

If < 0, the timestamp is relative to the end option (i.e.: default value is 4 hours ago).

end

0

Timestamp in milliseconds. If <= 0, the effective value will be the current timestamp.

step

300000

Requested time interval between rows. Actual step may differ.

maxrows

0

When using the measurements to render a graph, this should be set to the graph’s pixel width.

aggregation

AVERAGE

Consolidation function used. Can typically be AVERAGE, MIN or MAX. Depends on RRA definitions.

fallback-attribute

Secondary attribute that will be queried in the case the primary attribute does not exist.
Step sizes

The behavior of the step parameter changes based on time series strategy that is being used.

When using persistence strategies based on RRD, the available step sizes are limited to those defined by the RRA when the file was created. The effective step size used will be one that covers the requested period, and is closest to the requested step size. For maximum accuracy, use a step size of 1.

When using Newts, the step size can be set arbitrarily since the aggregation is performed at the time of request. In order to help prevent large requests, we limit to the step size of a minimum of 5 minutes, the default collection rate. This value can be decreased by setting the org.opennms.newts.query.minimum_step system property.

Usage examples with curl
Retrieve CPU counter metrics over the last 2 hours for node 1
curl -u admin:admin "http://127.0.0.1:8980/opennms/rest/measurements/node%5B1%5D.nodeSnmp%5B%5D/CpuRawUser?start=-7200000&maxrows=30&aggregation=AVERAGE"
Response
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<query-response end="1425588138256" start="1425580938256" step="300000">
  <columns>
    <values>159.5957271523179</values>
    <values>158.08531037527592</values>
    <values>158.45835584842285</values>
    ...
  </columns>
  <labels>CpuRawUser</labels>
  <timestamps>1425581100000</timestamps>
  <timestamps>1425581400000</timestamps>
  <timestamps>1425581700000</timestamps>
  ...
</query-response>
POSTs (Reading Data)
Resource Description

/measurements

Retrieve the measurements for one or more attributes, possibly spanning multiple resources, with support for JEXL expressions.

Here we use a POST instead of a GET to retrieve the measurements, which allows us to perform complex queries which are difficult to express in a query string. These requests cannot be used to update or create new metrics.

An example of the POST body is available bellow.

Usage examples with curl
Retrieve bits in and bits out metrics for a particular interface. Perform calculations on bits out, and only return the derived values.
curl -X POST  -H "Accept: application/json" -H "Content-Type: application/json" -u admin:admin  -d @report.json  http://127.0.0.1:8980/opennms/rest/measurements
Contents of report.json
{
    "start": 1425563626316,
    "end": 1425585226316,
    "step": 10000,
    "maxrows": 1600,
    "source": [
        {
            "aggregation": "AVERAGE",
            "attribute": "ifHCInOctets",
            "label": "ifHCInOctets",
            "resourceId": "nodeSource[Servers:1424038123222].interfaceSnmp[eth0-04013f75f101]",
            "transient": "false"
        },
        {
            "aggregation": "AVERAGE",
            "attribute": "ifHCOutOctets",
            "label": "ifHCOutOctets",
            "resourceId": "nodeSource[Servers:1424038123222].interfaceSnmp[eth0-04013f75f101]",
            "transient": "true"
        }
    ],
    "expression": [
        {
            "label": "ifHCOutOctetsNeg",
            "value": "-1.0 * ifHCOutOctets",
            "transient": "false"
        }
    ]
}
Response
{
    "step": 300000,
    "start": 1425563626316,
    "end": 1425585226316,
    "timestamps": [
        1425563700000,
        1425564000000,
        1425564300000,
        ...
    ],
    "labels": [
        "ifHCInOctets",
        "ifHCOutOctetsNeg"
    ],
    "columns": [
        {
            "values": [
                139.94817275747508,
                199.0062569213732,
                162.6264894795127,
                ...
            ]
        },
        {
            "values": [
                -151.66179401993355,
                -214.7415503875969,
                -184.9012624584718,
                ...
            ]
        }
    ]
}

2.8.13. Nodes

Note: the default offset is 0, the default limit is 10 results. To get all results, use limit=0 as a parameter on the URL (ie, GET /nodes?limit=0).

Additionally, anywhere you use "id" in the queries below, you can use the foreign source and foreign ID separated by a colon instead (ie, GET /nodes/fs:fid).

GETs (Reading Data)
Resource Description

/nodes

Get a list of nodes. This includes the ID and node label.

/nodes/{id}

Get a specific node, by ID.

/nodes/{id}/ipinterfaces

Get the list of IP interfaces associated with the given node.

/nodes/{id}/ipinterfaces/{ipAddress}

Get the IP interface for the given node and IP address.

/nodes/{id}/ipinterfaces/{ipAddress}/services

Get the list of services associated with the given node and IP interface.

/nodes/{id}/ipinterfaces/{ipAddress}/services/{service}

Get the requested service associated with the given node, IP interface, and service name.

/nodes/{id}/snmpinterfaces

Get the list of SNMP interfaces associated with the given node.

/nodes/{id}/snmpinterfaces/{ifIndex}

Get the specific interface associated with the given node and ifIndex.

/nodes/{id}/categories

Get the list of categories associated with the given node.

/nodes/{id}/categories/{categoryName}

Get the category associated with the given node and category name.

/nodes/{id}/assetRecord

Get the asset record associated with the given node.
POSTs (Adding Data)

POST requires XML using application/xml as its Content-Type.

Resource Description

/nodes

Add a node.

/nodes/{id}/ipinterfaces

Add an IP interface to the node.

/nodes/{id}/ipinterfaces/{ipAddress}/services

Add a service to the interface for the given node.

/nodes/{id}/snmpinterfaces

Add an SNMP interface to the node.

/nodes/{id}/categories

Add a category association to the node.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

Resource Description

/nodes/{id}

Modify a node with the given ID.

/nodes/{id}/ipinterfaces/{ipAddress}

Modify the IP interface with the given node ID and IP address.

/nodes/{id}/ipinterfaces/{ipAddress}/services/{service}

Modify the service with the given node ID, IP address, and service name.

/nodes/{id}/snmpinterfaces/{ifIndex}

Modify the SNMP interface with the given node ID and ifIndex.

/nodes/{id}/categories/{categoryName}

Modify the category with the given node ID and name.
DELETEs (Removing Data)

Perform a DELETE to the singleton URLs specified in PUT above to delete that object.

2.8.14. Notifications

Note: the default offset is 0, the default limit is 10 results. To get all results, use limit=0 as a parameter on the URL (ie, GET /events?limit=0).

GETs (Reading Data)
Resource Description

/notifications

Get a list of notifications.

/notifications/count

Get the number of notifications. (Returns plaintext, rather than XML or JSON.)

/notifications/{id}

Get the notification specified by the given ID.

To acknowledge or unacknowledge a notification, use the acks endpoint — see Acknowledgements.

2.8.15. Outage Timelines

GETs (Reading Data)
Resource Description

 /header/{start}/{end}/{width}

Generate the timeline header

 /image/{nodeId}/{ipAddress}/{serviceName}/{start}/{end}/{width}

Generate the timeline image

 /empty/{start}/{end}/{width}

Generate an empty timeline for non-monitored services

 /html/{nodeId}/{ipAddress}/{serviceName}/{start}/{end}/{width}

Generate the raw HTML for the image

2.8.16. Outages

GETs (Reading Data)
Resource Description

/outages

Get a list of outages.

/outages/count

Get the number of outages. (Returns plaintext, rather than XML or JSON.)

/outages/{id}

Get the outage specified by the given ID.

/outages/forNode/{nodeId}

Get the outages that match the given node ID.

2.8.17. Requisitions

RESTful service to the OpenNMS Horizon Provisioning Requisitions. In this API, these "groups" of nodes are aptly named and treated as requisitions.

This current implementation supports CRUD operations for managing provisioning requisitions. Requisitions are first POSTed and no provisioning (import/synchronize) operations are taken. This is done so that a) the XML can be verified and b) so that the operations can happen at a later time. They are moved to the deployed state (put in the active requisition repository) when an import is run.

If a request says that it gets the active requisition, that means it returns the pending requisition (being edited for deployment) if there is one, otherwise it returns the deployed requisition. Note that anything that says it adds/deletes/modifies a node, interface, etc. in these instructions is referring to modifying that element from the requisition not from the database itself. That will happen upon import/synchronization.

You may write requisition data if the authenticated user is in the provision, rest, or admin roles.

GETs (Reading Data)
Resource Description

/requisitions

Get all active requisitions.

/requisitions/count

Get the number of active requisitions. (Returns plaintext, rather than XML or JSON.)

/requisitions/deployed

Get the list of all deployed (active) requisitions.

/requisitions/deployed/count

Get the number of deployed requisitions. (Returns plaintext, rather than XML or JSON.)

/requisitions/{name}

Get the active requisition for the given foreign source name.

/requisitions/{name}/nodes

Get the list of nodes being requisitioned for the given foreign source name.

/requisitions/{name}/nodes/{foreignId}

Get the node with the given foreign ID for the given foreign source name.

/requisitions/{name}/nodes/{foreignId}/interfaces

Get the interfaces for the node with the given foreign ID and foreign source name.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}

Get the interface with the given IP for the node with the specified foreign ID and foreign source name.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}/services

Get the services for the interface with the specified IP address, foreign ID, and foreign source name.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}/services/{service}

Get the given service with the specified IP address, foreign ID, and foreign source name.

/requisitions/{name}/nodes/{foreignId}/categories

Get the categories for the node with the given foreign ID and foreign source name.

/requisitions/{name}/nodes/{foreignId}/categories/{categoryName}

Get the category with the given name for the node with the specified foreign ID and foreign source name.

/requisitions/{name}/nodes/{foreignId}/assets

Get the assets for the node with the given foreign ID and foreign source name.

/requisitions/{name}/nodes/{foreignId}/assets/{assetName}

Get the value of the asset for the given assetName for the node with the given foreign ID and foreign source name.
POSTs (Adding Data or Updating existing Data)
Expects JSON/XML
Resource Description

/requisitions

Adds (or replaces) a requisition.

/requisitions/{name}/nodes

Adds (or replaces) a node in the specified requisition. This operation can be very helpful when working with [[Large Requisitions]].

/requisitions/{name}/nodes/{foreignId}/interfaces

Adds (or replaces) an interface for the given node in the specified requisition.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}/services

Adds (or replaces) a service on the given interface in the specified requisition.

/requisitions/{name}/nodes/{foreignId}/categories

Adds (or replaces) a category for the given node in the specified requisition.

/requisitions/{name}/nodes/{foreignId}/assets

Adds (or replaces) an asset for the given node in the specified requisition.
PUTs (Modifying Data)
Expects form-urlencoded
Resource Description

/requisitions/{name}/import

Performs an import/synchronize on the specified foreign source. This turns the "active" requisition into the "deployed" requisition.

/requisitions/{name}/import?rescanExisting=false

Performs an import/synchronize on the specified foreign source. This turns the "active" requisition into the "deployed" requisition. Existing nodes will not be scanned until the next rescan interval, only newly-added nodes will be. Useful if you’re planning on making a series of changes.

/requisitions/{name}

Update the specified foreign source.

/requisitions/{name}/nodes/{foreignId}

Update the specified node for the given foreign source.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}

Update the specified IP address for the given node and foreign source.
DELETEs (Removing Data)
Resource Description

/requisitions/{name}

Delete the pending requisition for the named foreign source.

/requisitions/deployed/{name}

Delete the active requisition for the named foreign source.

/requisitions/{name}/nodes/{foreignId}

Delete the node with the given foreign ID from the given requisition.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}

Delete the IP address from the requisitioned node with the given foreign ID and foreign source.

/requisitions/{name}/nodes/{foreignId}/interfaces/{ipAddress}/services/{service}

Delete the service from the requisitioned interface with the given IP address, foreign ID and foreign source.

/requisitions/{name}/nodes/{foreignId}/categories/{category}

Delete the category from the node with the given foreign ID and foreign source.

/requisitions/{name}/nodes/{foreignId}/assets/{field}

Delete the field from the requisition’s nodes asset with the given foreign ID and foreign source.

2.8.18. Resources API

The Resources API can be used to list or delete resources at the node level and below. This service is especially useful in conjunction with the Measurements API.

GETs (Reading Data)
Resource Description

/resources

Retrieve the full tree of resources in the system (expensive, use with care)

/resources/{resourceId}

Retrieve the tree of resources starting with the named resource ID

/resources/fornode/{nodeCriteria}

Retrieve the tree of resources for a node, given its database ID or foreign-source:foreign-ID tuple
DELETEs (Removing Data)
Resource Description

/resources/{resourceId}

Delete resource with the named resource ID, and all its child resources, if any

The following table shows all supported query string parameters and their default values.

name default comment

depth

varies

GET only. Limits the tree depth for retrieved resources. Defaults to 1 when listing all resources, or to -1 (no limit) when listing a single resource.
Usage examples with curl
Retrieve the tree of resources rooted at the node with database ID 1, by resource ID
curl -u admin:admin "http://127.0.0.1:8980/opennms/rest/resources/node%5B1%5D"
Response
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<resource id="node[1]"
          label="anode"
          name="1"
          link="element/node.jsp?node=1"
          typeLabel="Node">
  <children count="11" totalCount="11">
    <resource id="node[1].nodeSnmp[]"
              label="Node-level Performance Data"
              name=""
              typeLabel="SNMP Node Data"
              parentId="node[1]">
      <children/>
      <stringPropertyAttributes/>
      <externalValueAttributes/>
      <rrdGraphAttributes>
        <entry>
          <key>loadavg1</key>
          <value name="loadavg1"
                 relativePath="snmp/1"
                 rrdFile="loadavg1.jrb"/>
        </entry>
          <key>tcpActiveOpens</key>
          <value name="tcpActiveOpens"
                 relativePath="snmp/1"
                 rrdFile="tcpActiveOpens.jrb"/>
        </entry>
        <entry>
          <key>memTotalFree</key>
          <value name="memTotalFree"
                 relativePath="snmp/1"
                 rrdFile="memTotalFree.jrb"/>
        </entry>
        ...
      </rrdGraphAttributes>
    </resource>
    <resource id="node[1].interfaceSnmp[lo]"
              label="lo (10 Mbps)"
              name="lo"
              link="element/snmpinterface.jsp?node=1&amp;ifindex=1"
              typeLabel="SNMP Interface Data"
              parentId="node[1]">
      <children/>
      <stringPropertyAttributes>
        <entry>
          <key>ifName</key>
          <value>lo</value>
        </entry>
        ...
      </stringPropertyAttributes>
      <externalValueAttributes>
        <entry>
          <key>ifSpeed</key>
          <value>10000000</value>
        </entry>
        <entry>
          <key>ifSpeedFriendly</key>
          <value>10 Mbps</value>
        </entry>
      </externalValueAttributes>
      <rrdGraphAttributes>
        ...
        <entry>
          <key>ifHCInOctets</key>
          <value name="ifHCInOctets"
                 relativePath="snmp/1/lo"
                 rrdFile="ifHCInOctets.jrb"/>
        </entry>
        <entry>
          <key>ifHCOutOctets</key>
          <value name="ifHCOutOctets"
                 relativePath="snmp/1/lo"
                 rrdFile="ifHCOutOctets.jrb"/>
        </entry>
        ...
      </rrdGraphAttributes>
    </resource>
    ...
  </children>
  <stringPropertyAttributes/>
  <externalValueAttributes/>
  <rrdGraphAttributes/>
</resource>
Retrieve the tree of resources rooted at the node with database ID 1, without having to construct a resource ID
curl -u admin:admin "http://127.0.0.1:8980/opennms/rest/resources/fornode/1"
Retrieve the tree of resources rooted at the node with foreign-ID node42 in requisition Servers, by resource ID
curl -u admin:admin "http://127.0.0.1:8980/opennms/rest/resources/nodeSource%5BServers:node42%5D"
Retrieve the tree of resources rooted at the node with foreign-ID node42 in requisition Servers, without having to construct a resource ID
curl -u admin:admin "http://127.0.0.1:8980/opennms/rest/resources/fornode/Servers:node42"

2.8.19. Realtime Console data

The Realtime Console (RTC) calculates the availability for monitored services. Data provided from the RTC is available to the ReST API.

GETs (Reading Data)
Resource Description

/availability/categories/{category}

Get all nodes and availability data from a given SLA category filter, i.e. Web Servers (Web+Servers)

/availability/categories/{category}/nodes

Get node availability data for each node of a given SLA category filter

/availability/categories/{category}/nodes/{nodeId}

Get detailed service availability for a given node in a given SLA category filter

/availability/nodes/{nodeId}

Get detailed availability for all services on a given node
Example
curl -u demo:demo http://demo.opennms.org/opennms/rest/availability/categories/Web+Servers
curl -u demo:demo http://demo.opennms.org/opennms/rest/availability/categories/nodes
curl -u demo:demo http://demo.opennms.org/opennms/rest/availability/categories/nodes/31
curl -u demo:demo http://demo.opennms.org/opennms/rest/availability/nodes/31

2.8.20. Scheduled Outages

GETs (Reading Data)
Parameter Description

/sched-outages

to get a list of configured scheduled outages.

/sched-outages/{outageName}

to get the details of a specific outage.
POSTs (Setting Data)
Parameter Description

/sched-outages

to add a new outage (or update an existing one).
PUTs (Modifying Data)
Parameter Description

/sched-outages/{outageName}/collectd/{package}

to add a specific outage to a collectd’s package.

/sched-outages/{outageName}/pollerd/{package}

to add a specific outage to a pollerd’s package.

/sched-outages/{outageName}/threshd/{package}

to add a specific outage to a threshd’s package.

/sched-outages/{outageName}/notifd

to add a specific outage to the notifications.
DELETEs (Removing Data)
Parameter Description

/sched-outages/{outageName}

to delete a specific outage.

/sched-outages/{outageName}/collectd/{package}

to remove a specific outage from a collectd’s package.

/sched-outages/{outageName}/pollerd/{package}

to remove a specific outage from a pollerd’s package.

/sched-outages/{outageName}/threshd/{package}

to remove a specific outage from a threshd’s package.

/sched-outages/{outageName}/notifd

to remove a specific outage from the notifications.

2.8.21. SNMP Configuration

You can edit the community string, SNMP version, etc. for an IP address using this interface. If you make a change that would overlap with an existing snmp-config.xml, it will automatically create groups of <definition /> entries as necessary. If no <definition /> entry is created it matches the defaults.

There are different versions of the interface (see below). The following operations are supported:

GETs (Reading Data)
Parameter Description

/snmpConfig/{ipAddress}

Get the SNMP configuration for a given IP address.
PUTs (Modifying Data)
Parameter Description

/snmpConfig/{ipAddress}

Add or update the SNMP configuration for a given IP address.
Determine API version

To determine the version of the API running in your OpenNMS Horizon type http://localhost:8980/opennms/rest/snmpConfig/1.1.1.1 in your browser and have a look at the output:

  • Version 1: If the output only have attributes community, port, retries, timeout and version

  • Version 2: If there are more attributes than described before (e.g. max Repetitions)

API Version 1

In version 1 only a few attributes defined in snmp-config.xsd are supported. These are defined in snmp-info.xsd:

<xs:schema
    xmlns:tns="http://xmlns.opennms.org/xsd/config/snmp-info"
    xmlns:xs="http://www.w3.org/2001/XMLSchema"
    elementFormDefault="qualified"
    version="1.0"
    targetNamespace="http://xmlns.opennms.org/xsd/config/snmp-info">
  <xs:element name="snmp-info" type="tns:snmpInfo"/>
  <xs:complexType name="snmpInfo">
    <xs:sequence>
      <xs:element name="community" type="xs:string" minOccurs="0"/>
      <xs:element name="port" type="xs:int"/>
      <xs:element name="retries" type="xs:int"/>
      <xs:element name="timeout" type="xs:int"/>
      <xs:element name="version" type="xs:string" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>

The following table shows all supported attributes, optional restrictions and the mapping between snmp-info.xsd and snmp-config.xsd. All parameters can be set regardless the version.

attribute snmp-info.xml attribute snmp-config.xml default restricted to version restriction

version

version

v1

-

"v1", "v2c" or "v3" are valid arguments. If an invalid or empty argument is provided "v1" is used.

port

port

161

-

Integer > 0

retries

retry

1

-

Integer > 0

timeout

timeout

3000

-

Integer > 0

community

read-community

public

-

any string with a length >= 1
Example 1:
curl -v -X PUT -H "Content-Type: application/xml" \
     -H "Accept: application/xml" \
     -d "&lt;snmp-info&gt;
             &lt;community&gt;yRuSonoZ&lt;/community&gt;
             &lt;port&gt;161&lt;/port&gt;
             &lt;retries&gt;1&lt;/retries&gt;
             &lt;timeout&gt;2000&lt;/timeout&gt;
             &lt;version&gt;v2c&lt;/version&gt;
          &lt;/snmp-info&gt;" \
     -u admin:admin http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Creates or updates a <definition/>-entry for IP address 10.1.1.1 in snmp-config.xml.

Example 2:
curl -v -X GET -u admin:admin http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Returns the SNMP configuration for IP address 10.1.1.1 as defined in example 1.

API Version 2

Since Version 2 all attributes of a <definition /> entry defined in snmp-config.xsd (http://xmlns.opennms.org/xsd/config/snmp) can be set or get via the interface - except it is only possible to set the configuration for one IP address and not for a range of IP addresses. This may change in the future.

The interface uses SnmpInfo objects for communication. Therefore it is possible to set for example v1 and v3 parameters in one request (e.g. readCommunity String and privProtocol String). However OpenNMS Horizon does not allow this. It is only allowed to set attributes which have no version restriction (e.g. timeout value) or the attributes which are limited to the version (e.g. readCommunity String if version is v1/v2c). The same is for getting data from the API, even if it is possible to store v1 and v3 parameters in one definition block in the snmp-config.xml manually, the ReST API will only return the parameters which match the version. If no version is defined, the default is assumed (both in PUT and GET requests).

The SnmpInfo schema is defined as follows:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xs:schema
  elementFormDefault="qualified"
  version="1.0"
  targetNamespace="http://xmlns.opennms.org/xsd/config/snmp-info"
  xmlns:tns="http://xmlns.opennms.org/xsd/config/snmp-info"
  xmlns:xs="http://www.w3.org/2001/XMLSchema">

  <xs:element name="snmp-info" type="tns:snmpInfo"/>
  <xs:complexType name="snmpInfo">
    <xs:sequence>
      <xs:element name="authPassPhrase" type="xs:string" minOccurs="0"/>
      <xs:element name="authProtocol" type="xs:string" minOccurs="0"/>
      <xs:element name="community" type="xs:string" minOccurs="0"/>
      <xs:element name="contextEngineId" type="xs:string" minOccurs="0"/>
      <xs:element name="contextName" type="xs:string" minOccurs="0"/>
      <xs:element name="engineId" type="xs:string" minOccurs="0"/>
      <xs:element name="enterpriseId" type="xs:string" minOccurs="0"/>
      <xs:element name="maxRepetitions" type="xs:int" minOccurs="0"/>
      <xs:element name="maxRequestSize" type="xs:int" minOccurs="0"/>
      <xs:element name="maxVarsPerPdu" type="xs:int" minOccurs="0"/>
      <xs:element name="port" type="xs:int" minOccurs="0"/>
      <xs:element name="privPassPhrase" type="xs:string" minOccurs="0"/>
      <xs:element name="privProtocol" type="xs:string" minOccurs="0"/>
      <xs:element name="proxyHost" type="xs:string" minOccurs="0"/>
      <xs:element name="readCommunity" type="xs:string" minOccurs="0"/>
      <xs:element name="retries" type="xs:int" minOccurs="0"/>
      <xs:element name="securityLevel" type="xs:int" minOccurs="0"/>
      <xs:element name="securityName" type="xs:string" minOccurs="0"/>
      <xs:element name="timeout" type="xs:int" minOccurs="0"/>
      <xs:element name="version" type="xs:string" minOccurs="0"/>
      <xs:element name="writeCommunity" type="xs:string" minOccurs="0"/>
    </xs:sequence>
  </xs:complexType>
</xs:schema>

The following table shows all supported attributes, the mapping between snmp-info.xsd and snmp-config.xsd. It also shows the version limitations, default values and the restrictions - if any.

attribute snmp-info.xml attribute snmp-config.xml

default

restricted to version

restriction

version

version

v1

-

"v1", "v2c" or "v3" are valid arguments. If an invalid or empty argument is provided "v1" is used.

port

port

161

-

Integer > 0

retries

retry

1

-

Integer > 0

timeout

timeout

3000

-

Integer > 0

maxVarsPerPdu

max-vars-per-pdu

10

-

Integer > 0

maxRepetitions

max-repetitions

2

-

Integer > 0

maxRequestSize

max-request-size

65535

-

Integer > 0

proxyHost

proxy-host

-

readCommunity

read-community

public

v1, v2c

writeCommunity

write-community

private

v1, v2c

securityName

security-name

opennmsUser

v3

securityLevel

security-level

noAuthNoPriv

v3

Integer value, which can be null, 1, 2, or 3. <ul><li>1 means noAuthNoPriv</li><li>2 means authNoPriv</li><li>3 means authPriv</li></ul> If you do not set the security level manually it is determined automatically: <ul><li>if no authPassPhrase set the securityLevel is 1</li><li>if a authPassPhrase and no privPassPhrase is set the security level is 2.</li><li>if a authPassPhrase and a privPassPhrase is set the security level is 3.</li></ul>

authPassPhrase

auth-passphrase

0p3nNMSv3

v3

authProtocol

auth-protocol

MD5

v3

only MD5 or SHA are valid arguments

privPassPhrase

privacy-passphrase

0p3nNMSv3

v3

privProtocol

privacy-protocol

DES

v3

only DES, AES, AES192 or AES256 are valid arguments.

engineId

engine-id

v3

contextEngineId

context-engine-id

v3

contextName

context-name

v3

enterpriseId

enterprise-id

v3
Example 1:
curl -v -X PUT -H "Content-Type: application/xml" \
     -H "Accept: application/xml" \
     -d "&lt;snmp-info&gt;
             &lt;readCommunity&gt;yRuSonoZ&lt;/readCommunity&gt;
             &lt;port&gt;161&lt;/port&gt;
             &lt;retries&gt;1&lt;/retries&gt;
             &lt;timeout&gt;2000&lt;/timeout&gt;
             &lt;version&gt;v2c&lt;/version&gt;
          &lt;/snmp-info&gt;" \
     -u admin:admin http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Creates or updates a <definition/>-entry for IP address 10.1.1.1 in snmp-config.xml.

Example 2:
curl -v -X GET -u admin:admin http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Returns the SNMP configuration for IP address 10.1.1.1 as defined in example 1.

Example 3:
curl -v -X PUT -H "Content-Type: application/xml" \
     -H "Accept: application/xml" \
     -d "&lt;snmp-info&gt;
             &lt;readCommunity&gt;yRuSonoZ&lt;/readCommunity&gt;
             &lt;port&gt;161&lt;/port&gt;
             &lt;retries&gt;1&lt;/retries&gt;
             &lt;timeout&gt;2000&lt;/timeout&gt;
             &lt;version&gt;v1&lt;/version&gt;
             &lt;securityName&gt;secret-stuff&lt;/securityName&gt;
             &lt;engineId&gt;engineId&lt;/engineId&gt;
          &lt;/snmp-info&gt;" \
     -u admin:admin http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Creates or updates a <definition/>-entry for IP address 10.1.1.1 in snmp-config.xml ignoring attributes securityName and engineId.

Example 4:
curl -v -X PUT -H "Content-Type: application/xml" \
     -H "Accept: application/xml" \
     -d "&lt;snmp-info&gt;
             &lt;readCommunity&gt;yRuSonoZ&lt;/readCommunity&gt;
             &lt;port&gt;161&lt;/port&gt;
             &lt;retries&gt;1&lt;/retries&gt;
             &lt;timeout&gt;2000&lt;/timeout&gt;
             &lt;version&gt;v3&lt;/version&gt;
             &lt;securityName&gt;secret-stuff&lt;/securityName&gt;
             &lt;engineId&gt;engineId&lt;/engineId&gt;
          &lt;/snmp-info&gt;" \
     -u admin:admin http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Creates or updates a <definition/>-entry for IP address 10.1.1.1 in snmp-config.xml ignoring attribute readCommunity.

2.8.22. Users

Since users are not currently stored in the database, the ReST interface for them is not as full-fledged as that of nodes, etc.

You cannot use hibernate criteria for filtering. You may need to touch the $OPENNMS_HOME/etc/users.xml file on the filesystem for any addition or modification actions to take effect (see NMS-6469 for details).
GETs (Reading Data)
Parameter Description

/users

Get a list of users.

/users/{username}

Get a specific user, by username.
POSTs (Adding Data)
Parameter Description

/users

Add a user. If supplying a password it is assumed to be hashed or encrypted already, at least as of 1.12.5. To indicate that the supplied password uses the salted encryption algorithm rather than the older MD5 based algorithm, you need to pass an element named passwordSalt with text true after the password element (or key/value pairs if using JSON).
PUTs (Modifying Data)
Parameter Description

/users/{username}

Update an existing user’s full-name, user-comments, password, passwordSalt and duty-schedule values.

2.8.23. SNMP Trap Northbounder Interface Configuration

GETs (Reading Data)
Resource Description

/config/snmptrap-nbi

Gets full content of the configuration.

/config/snmptrap-nbi/status

Gets the status of the SNMP Trap NBI (returns either true or false).

/config/snmptrap-nbi/destinations

Gets the name of all the existing destinations.

/config/snmptrap-nbi/destinations/{name}

Gets the content of the destination named {name}
PUTs (Update defaults)

On a successful request, the Syslog NBI will be notified about the configuration change.

Resource Description

/config/snmptrap-nbi/status?enabled=(true;false)

Sets the status of the SNMP Trap NBI.
POSTs (Adding Data)

POST requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the SNMP Trap NBI will be notified about the configuration change.

Resource Description

/config/snmptrap-nbi

Updates the full content of the configuration.

/config/snmptrap-nbi/destinations

Adds a new or overrides an existing destination.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the SNMP Trap NBI will be notified about the configuration change.

Resource Description

/config/snmptrap-nbi/destinations/{name}

Updates the content of the destination named {name}
DELETEs (Remove Data)

On a successful request, the SNMP Trap NBI will be notified about the configuration change.

Resource Description

/config/snmptrap-nbi/destinations/{name}

Updates the content of the destination named {name}

2.8.24. Email Northbounder Interface Configuration

GETs (Reading Data)
Resource Description

/config/email-nbi

Gets full content of the configuration.

/config/email-nbi/status

Gets the status of the Email NBI (returns either true or false).

/config/email-nbi/destinations

Gets the name of all the existing destinations.

/config/email-nbi/destinations/{name}

Gets the content of the destination named {name}
PUTs (Update defaults)

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/email-nbi/status?enabled=(true;false)

Sets the status of the Email NBI.
POSTs (Adding Data)

POST requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/email-nbi/destinations

Adds a new or overrides an existing destination.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/email-nbi/destinations/{name}

Updates the content of the destination named {name}
DELETEs (Remove Data)

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/email-nbi/destinations/{name}

Updates the content of the destination named {name}

2.8.25. Javamail Configuration

GETs (Reading Data)
Resource Description

/config/javamail/default/readmail

Get the name of the default readmail config.

/config/javamail/default/sendmail

Get the name of the default sendmail config.

/config/javamail/readmails

Get the name of all the existing readmail configurations.

/config/javamail/sendmails

Get the name of all the existing sendmail configurations.

/config/javamail/end2ends

Get the name of all the existing end2end mail configurations.

/config/javamail/readmails/{name}

Get the content of the readmail configuration named {name}

/config/javamail/sendmails/{name}

Get the content of the sendmail configuration named {name}

/config/javamail/end2ends/{name}

Get the content of the end2end mail configuration named {name}
POSTs (Adding/Updating Data)

POST requires form data using application/xml or application/json as a Content-Type.

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/javamail/readmails

Adds a new or overrides an existing readmail configuration.

/config/javamail/sendmails

Adds a new or overrides an existing sendmail configuration.

/config/javamail/end2ends

Adds a new or overrides an existing end2ends mail configuration.
PUTs (Update defaults)

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

config/javamail/default/readmail/{name}

Sets the readmail named {name} as the new default.

config/javamail/default/sendmail/{name}

Sets the sendmail named {name} as the new default.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/javamail/readmails/{name}

Updates the content of the readmail configuration named {name}

/config/javamail/sendmails/{name}

Updates the content of the sendmail configuration named {name}

/config/javamail/end2ends/{name}

Updates the content of the end2end mail configuration named {name}
DELETEs (Remove Data)

On a successful request, the Email NBI will be notified about the configuration change.

Resource Description

/config/javamail/readmails/{name}

Removes the readmail configuration named {name}

/config/javamail/sendmails/{name}

Removes the sendmail configuration named {name}

/config/javamail/end2ends/{name}

Removes the end2end mail configuration named {name}

2.8.26. Syslog Northbounder Interface Configuration

GETs (Reading Data)
Resource Description

/config/syslog-nbi

Gets full content of the configuration.

/config/syslog-nbi/status

Gets the status of the Syslog NBI (returns either true or false).

/config/syslog-nbi/destinations

Gets the name of all the existing destinations.

/config/syslog-nbi/destinations/{name}

Gets the content of the destination named {name}
PUTs (Update defaults)

On a successful request, the Syslog NBI will be notified about the configuration change.

Resource Description

/config/syslog-nbi/status?enabled=(true;false)

Sets the status of the Syslog NBI.
POSTs (Adding Data)

POST requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the Syslog NBI will be notified about the configuration change.

Resource Description

/config/syslog-nbi

Updates the full content of the configuration.

/config/syslog-nbi/destinations

Adds a new or overrides an existing destination.
PUTs (Modifying Data)

PUT requires form data using application/x-www-form-urlencoded as a Content-Type.

On a successful request, the Syslog NBI will be notified about the configuration change.

Resource Description

/config/syslog-nbi/destinations/{name}

Updates the content of the destination named {name}
DELETEs (Remove Data)

On a successful request, the Syslog NBI will be notified about the configuration change.

Resource Description

/config/syslog-nbi/destinations/{name}

Updates the content of the destination named {name}

2.9. ReST API Examples

2.9.1. Getting Graph data

While graphs aren’t technically available via ReST, you can parse some ReST variables to get enough data to pull a graph. This isn’t ideal because it requires multiple fetches, but depending on your use case, this may be adequate for you.

I’m in-lining some sample PHP code which should do this (not tested at all, cut & paste from old code I have that does not use the ReST- interface, and/or coded straight into the browser so YMMV). If you go to your NMS and click the resource graphs, then right click the graph you want and hit _View Image you will get the full URL that would need to be passed to pull that graph as a standalone image.

From that just take the URL and plug in the values you pulled from ReST to get a graph for whatever node you wanted.

function fetchit($thing, $user = "user", $pass = "pass") {
    $url = "http://localhost:8980/opennms";
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url . $thing);
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
    curl_setopt($ch, CURLOPT_USERPWD, $user.':'.$pass);
    $data = curl_exec($ch);
    curl_close($ch);
    return $data;
}

// this assumes you already have found the nodeId via a previous REST call or some other means.  Provided more as an example than what you might want.
function getNodeInterfaces($nodeId) {
    $data = fetchit("/rest/nodes/$nodeId/snmpinterfaces");
     return simplexml_load_string($data);
}

function fetchGraphs($nodeId) {
     $ints = getNodeInterfaces($nodeId);
     $chars = array('/','.',':','-',' ');
     $endtime = time();
     $starttime = (string)(time() - ($days * 24 * 60 * 60)) ;

     // use bcmath or a better version of PHP if  you don't want this hypocrisy here.
     $endtime = $endtime . '000';
     $starttime = $starttime . '000';

     for($i=0; $i<count($ints->snmpInterfaces); $i++) {
         $ifname = $ints->snmpInterfaces[$i]->snmpInterface->ifName;
         $mac = $ints->snmpInterfaces[$i]->snmpInterface->physAddr;
         $if = str_replace($chars, "_", $ifname);
         if ( strlen(trim($mac)) < 12 ) { $mac_and_if = $if; } else { $mac_and_if = $if .'-'. $mac; };

         $image = fetchit("$url/graph/graph.png?resource=node[$nodeId].interfaceSnmp[$mac_and_if]&report=report=mib2.HCbits&start=$starttime&end=$endtime");
         // you can poop this to a file now, or set header('Content-type: image/png'); then print "$image";
     }
}

2.9.2. provision.pl examples and notes

One way to test out the new ReST interface is to use provision.pl. If you run it you’ll get a summary of the output, but it’s not totally obvious how it all works.

Here is an example of adding a new node using the ReST interface:

# add a new foreign source called ubr
/usr/share/opennms/bin/provision.pl requisition add ubr
/usr/share/opennms/bin/provision.pl node add ubr 10341111 clownbox
/usr/share/opennms/bin/provision.pl node set ubr 10341111 city clownville
/usr/share/opennms/bin/provision.pl node set ubr 10341111 building clown-town-hall
/usr/share/opennms/bin/provision.pl node set ubr 10341111 parent-foreign-id 1122114
/usr/share/opennms/bin/provision.pl interface add ubr 10341111 10.1.3.4

# this is like a commit.  No changes will take effect until you import a foreign source
/usr/share/opennms/bin/provision.pl requisition import ubr

You will probably need to specify the username/password of an admin. To do this add:

--username=admin --password=clownnms

to the command line.

2.9.3. Debian (Lenny) Notes

For Lenny, you’ll need to pull a package out of backports to make everything work right. Read http://backports.org/dokuwiki/doku.php?id=instructions for instructions on adding it to sources.list.

# install liburi-perl from backports
sudo apt-get -t lenny-backports install liburi-perl

2.9.4. Windows Powershell ReST

Example of using Windows Powershell to fill some asset fields with ReST.

# Installdate of Windows
$wmi = Get-WmiObject -Class Win32_OperatingSystem
$dateInstalled = $wmi.ConvertToDateTime($wmi.InstallDate)

# Serialnumber and manufacturer of server
Get-WmiObject win32_bios | select SerialNumber
$wmi = Get-WmiObject -Class win32_bios
$manufacturer = $wmi.Manufacturer

# Text file with a description of the server for the comments field
$comment = Get-Content "C:\Program Files\BGInfo\Info_Description.txt" | Out-String

$user ="admin"
$pass= "admin"

$secpasswd = ConvertTo-SecureString $user -AsPlainText -Force
$cred = New-Object System.Management.Automation.PSCredential ($pass, $secpasswd)

$nodeid = Invoke-RestMethod -Uri http://opennms.domain.nl:8980/opennms/rest/nodes?label=servername.domain.nl -Credential $cred
$nodeid = $nodeid.nodes.node.id

$uri="http://opennms.domain.nl:8980/opennms/rest/nodes/$nodeid/assetRecord"

Invoke-RestMethod -Uri "http://opennms.massxess.nl:8980/opennms/rest/nodes/$nodeid/assetRecord/?building=133" -Credential $cred -Method PUT
Invoke-RestMethod -Uri "$uri/?manufacturer=$manufacturer" -Credential $cred -Method PUT
Invoke-RestMethod -Uri "$uri/?dateInstalled=$dateInstalled" -Credential $cred -Method PUT
Invoke-RestMethod -Uri "$uri/?comment=$comment" -Credential $cred -Method PUT

3. Develop Documentation

This document is the guideline for people who wish to contribute to writing documentation for the OpenNMS project. The OpenNMS software is free and open source, contribution of any kind is welcome. We ask that you observe the rules and guidelines outlined here to maintain consistency across the project.

Each (sub)project is represented as a section of the documentation. Each section will produce a HTML output in the file system that is generated in the target/generated sources folder.

The chosen file format for documentation is AsciiDoc (Asciidoc Homepage). Document files use the .adoc file extension.

Note that there are different ways to contribute documentation, each suitable for the different use cases:

  • Tutorials and How To’s should be published on the OpenNMS Wiki. For example: you want to describe how to use the Net-SNMP agent and the SNMP monitor from OpenNMS to solve a special use case with OpenNMS.

  • The documentation in the source code should be formal technical documentation. The writing style should be accurate and concise. However, ensure that you explain concepts in detail and do not make omissions.

3.1. File Structure in opennms-doc

Directory Contents

guide-user/

module with the guide for OpenNMS user e.g. NOC user who don’t change behavior of OpenNMS.

guide-admin/

module with the guide for administrators configuring, optimizing and running OpenNMS

guide-development/

module with the guide for those who want to develop OpenNMS

guide-install/

module with the guide of how to install OpenNMS on different operating systems

releasenotes/

module with the changelog and release notes

3.2. Writing

The following rules will help you to commit correctly formatted and prepared documentation for inclusion in the OpenNMS project. It is important that we maintain a level of consistency across all of our committers and the documentation they produce.

When writing place a single sentence on each line. This makes it easy to move content around, and also easy to spot long, or fragmented, sentences. This will also allow us to assign comments on a sentence in GitHub which will facilitate easier merging.

Other than writing documentation, you can help out by providing comments on documentation, reviewing, suggesting improvements or reporting bugs. To do this head over to: issue tracker for documentation!

3.2.1. Conventions for text formatting

The following conventions are used:

  • File names and path are written in `poller-configuration.xml` they will be rendered in: poller-configuration.xml;

  • Names that indicate special attention, e.g. this configuration matches *any* entry: this is rendered as: this configuration matches any entry;

  • _Italics_ is rendered as Italics and used for emphasis and indicate internal names and abbreviations;

  • *Bold* is rendered as Bold and should be used sparingly, for strong emphasis only;

  • +methodName()+ is rendered as methodName() and is also used for literals, (note: the content between the + signs will be parsed);

  • `command` is rendered as command (typically used for command-line or parts used in configuration files), (note: the content between the ` signs will not be parsed);

  • `my/path/` is rendered as my/path/ this is used for file names and paths;

  • \``double quote'' (which is two grave accents to the left and two acute accents to the right) renders as ``double quote'';

  • \`single quote' (which is a single grave accent to the left and a single acute accent to the right) renders as `single quote'.

3.2.2. Gotchas

  • Always leave a blank line at the top of the documents section. It might be the title ends up in the last paragraph of the document;

  • Start in line 2 setting a relative path to the images directory to picture rendering on GitHub:

// Allow image rendering
:imagesdir: relative/path/to/images/dir

  • Always leave a blank line at the end of documents;

  • As {} are used for Asciidoc attributes, everything inside will be treated as an attribute. To avoid this you have to escape the opening brace: \\{. If you do not escape the opening brace, the braces and the text inside them will be removed without any warning being issued!;

  • Forcing line breaks can be achieved with ` +` at the end of the line followed by a line break.

Example in source force line break
This is the first line +
and this a forced 2nd line
Rendered output with forced line break

This is the first line
and this a forced 2nd line

3.3. Headings and document structure

Each document starts over with headings from level zero (the document title). Each document should have an id. In some cases sections in the document need to have id’s as well, this depends on where they fit in the overall structure. If you wish to have a link to specific content that content has to have an id. A missing id in a mandatory place will cause the build to fail.

To start a document:

[[unique-id-verbose-is-ok]]
= The Document Title

If you are including the document inside another document and you need to push the headings down to the right level in the output, the leveloffset attribute is used.

Subsequent headings in a document should use the following syntax:

== Subheading

... content here ...

=== Subsubheading

content here ...

When you need to link to other parts of the manual you use the target id. To use a target id you follow this syntax:

<<doc-guidelines-links>>

This will render as: [doc-guidelines-links]

To use the target id in you document simply write the target id in your text, for example:

see <<target-id>>

this should suffice for most cases.

If you need to link to another document with your own link text, then follow this procedure:

<<target-id, link text that fits in the context>>
Having lots of linked text may work well in a web context but is a distracting in print. The documentation we are creating is intended for both mediums so be considerate of this in your usage.

If you wish to use an external link, they are are added as:

http://www.opennms.org/[Link text here]

This will render in the output as: Link text here

For short links it may be beneficial not to use accompanying link text:

http://www.opennms.org/

Which renders as: http://www.opennms.org/

It is acceptable to have a period trailing after the URL, it will not render as a part of the link.

3.5. Admonitions and useful notes

These are useful for defining specific sections, such as Notes, Tips and Important information. We encourage the use of them in the documentation as long as they are used appropriately. Choose from the following:

Source template for making a note for additional hints
NOTE: This is my note.

This is how its rendered:

This is my note.
Source for giving a tip
TIP: This is my tip.

This is how its rendered:

This is my tip.
Source for giving a important hint
IMPORTANT: This is my important hint.

This is how its rendered:

This is my important hint.
Source for giving a caution
CAUTION: This is my caution.

This is how its rendered:

This is my caution.
Source for giving a warning
WARNING: This is my warning.

This is how its rendered:

This is my warning.

A multiline variation:

TIP: Tiptext. +
     Line 2.

Which is rendered as:

Tiptext.
Line 2.
Remember to write these in full caps. There is no easy manner in which to add new admonitions, do not create your own.

3.6. Attributes

Common attributes you can use in documents:

  • {opennms-version} - rendered as "2016.1.24"

These can substitute part of URLs that point to, for example, APIdocs or source code. Note that opennms-git-tag also handles the case of snapshot/master.

Sample Asciidoc attributes which can be used:

  • {docdir} - root directory of the documents

  • {nbsp} - non-breaking space

3.7. Comments

There’s a separate build that includes comments. When the comments are used they show up with a yellow background. This build doesn’t run by default, but after a normal build, you can use make annotated to create a build yourself. You can use the resulting 'annotated' page to search for content as the full manual is a single page.

To write a comment:

// this is a comment

Comments are not visible in the standard build. Comment blocks won’t be included in the output of any build. The syntax for a comment block is:

////
Note that includes in here will still be processed, but not make it into the output.
That is, missing includes here will still break the build!
////

3.8. Tables

For representing structured information you can use tables. A table is constructed in the following manner:

[options="header, autowidth"]
|===
| Parameter     | Description                | Required | Default value
| `myFirstParm` | my first long description  | required | `myDefault`
| `myScndParm`  | my second long description | required | `myDefault`
|===

This is rendered as:

Parameter Description Required Default value

myFirstParm

my first long description

required

myDefault

myScndParm

my second long description

required

myDefault
Please align your columns in the AsciiDoc source in order to give better readability when editing in text view. If you have a very long description, break at 120 characters and align the text to improve source readability.
01 long table formatting
Figure 1. Example in AsciiDoc source for very long table descriptions

this is rendered as:

Parameter Description Required Default value

basic-authentication

Authentication credentials to perform basic authentication. Credentials should comply to RFC1945 section 11.1, without the Base64 encoding part. That’s: be a string made of the concatenation of:
1- the user ID;
2- a colon;
3- the password.
basic-authentication takes precedence over the user and password parameters.

optional

-

header[0-9]+

Additional headers to be sent along with the request. Example of valid parameter’s names are header0, header1 and header180. header is not a valid parameter name.

optional

-

3.9. Include images

When visualizing complex problems you can help the explanation and provide greater information by using an image. We use in OpenNMS documentation modules two directories for images.

The image folder structure mirrors the text structure. In this case it is a little bit easier to locate the AsciiDoc text file where the image is included.

Example folder structure for image files
.
└── opennms-doc(1)
    └── guide-doc(2)
        ├── README.adoc
        ├── pom.xml
        ├── src(3)
        |   └── asciidoc(4)
        |       ├── configs
        |       |   └── poller-configuration.xml
        |       ├── images(5)
        |       |   ├── 01_opennms-logo.png(6)
        |       |   └── 02_pris-overview.png
        |       ├── images_src(7)
        |       |   └── pris-overview.graphml(8)
        |       ├── index.adoc(9)
        |       └── text
        |           ├── images.adoc(10)
        |           ├── include-source.adoc
        |           ├── introduction.adoc
        |           └── writing.adoc
        └── target(11)
1 This folder contains all documentation modules;
2 The module for this documentation for target group of documentation contributors;
3 Indicates a source folder;
4 The documentation root folder;
5 Folder for images. Images should be *.png or *.jpg if included in the documentation;
6 The image used, the format is a leading <number>_ followed by a name using no spaces;
7 Some images are created from tools like yED, this folder should contain the editable version of the file with the same file name;
8 Editable version of the image source file, note no spaces in the name;
9 Main document file which includes all documentation parts and is rendered as index.html for the web;
10 AsciiDoc source file which can include images;
11 Target folder with generated HTML output after mvn clean package has been performed;
All images in the entire manual share the same namespace, it is therefore best practice to use unique identifiers for images.

To include an image file, make sure that it resides in the 'images/' directory relative to the document you’re including it within. Then use the following syntax for inclusion in the document:

First included image
.This is a caption of the image
image::docs/02_opennms-logo.png[]

Which is rendered as:

02 opennms logo
Figure 2. This is a caption of the image
The image path for the images you include is relative to the *.adoc source file, where you use the image.

3.10. Code Snippets

You can include code snippets, configuration- or source code files in the documentation. You can enable syntax highlighting by providing the given language parameter, this will work on source code or configuration.

3.10.1. Explicitly defined in the document

be careful to use this kind of code snippets as sparsely as possible. Code becomes obsolete very quickly, archaic usage practices are detrimental.

if you do wish to include snippets use the following method:

This is a sample configuration explicitly in the documentation
<service name="DNS" interval="300000" user-defined="false" status="on">
  <parameter key="retry" value="2" />
  <parameter key="timeout" value="5000" />
  <parameter key="port" value="53" />
  <parameter key="lookup" value="localhost" />
  <parameter key="fatal-response-codes" value="2,3,5" /><!-- ServFail, NXDomain, Refused -->
  <parameter key="rrd-repository" value="/opt/opennms/share/rrd/response" />
  <parameter key="rrd-base-name" value="dns" />
  <parameter key="ds-name" value="dns" />
</service>

If there’s no suitable syntax highlighter for the code used just omit the language: [source].

Currently the following syntax highlighters are enabled:

  • Bash

  • Groovy

  • Java

  • JavaScript

  • Python

  • XML

For other highlighters that could be added see https://code.google.com/p/google-code-prettify/.

3.10.2. Included from an example file

You can include source or configuration from an external file. In this way you can provide a working example configuration maintaining doc and example at the same time. The procedure and rules are the same as with images, the path is relative to the *.adoc file where the file to be used is included.

Include complete external file
[source,xml]
----
include::../configs/wmi-config.xml[]
----

This is how it’s rendered:

<?xml version="1.0"?>
<wmi-config retry="2" timeout="1500"
	username="Administrator" domain="WORKGROUP" password="password">
</wmi-config>

3.10.3. Include parts of a file

If you want to include just a specific segment of a large configuration file, you can assign tags that indicate to AsciiDoc the section that is to be included. In this example just the service definition of the ICMP monitor should be included.

In the 'poller-configuration.xml' tag the section in the following manner:

...
<rrd step="300">
  <rra>RRA:AVERAGE:0.5:1:2016</rra>
  <rra>RRA:AVERAGE:0.5:12:1488</rra>
  <rra>RRA:AVERAGE:0.5:288:366</rra>
  <rra>RRA:MAX:0.5:288:366</rra>
  <rra>RRA:MIN:0.5:288:366</rra>
</rrd>
<!-- # tag::IcmpServiceConfig[] -->
<service name="ICMP" interval="300000" user-defined="false" status="on">
  <parameter key="retry" value="2" />
  <parameter key="timeout" value="3000" />
  <parameter key="rrd-repository" value="/opt/opennms/share/rrd/response" />
  <parameter key="rrd-base-name" value="icmp" />
  <parameter key="ds-name" value="icmp" />
</service>
<!-- # end::IcmpServiceConfig[] -->
<service name="DNS" interval="300000" user-defined="false" status="on">
  <parameter key="retry" value="2" />
  <parameter key="timeout" value="5000" />
  <parameter key="port" value="53" />
...
Include this tagged part in the documentation using the tag parameter
[source,xml]
----
include::../configs/poller-configuration.xml[tags=IcmpServiceConfig]
----
This is how it rendered
    <service name="ICMP" interval="300000" user-defined="false" status="on">
      <parameter key="retry" value="2" />
      <parameter key="timeout" value="3000" />
      <parameter key="rrd-repository" value="/opt/opennms/share/rrd/response" />
      <parameter key="rrd-base-name" value="icmp" />
      <parameter key="ds-name" value="icmp" />
    </service>
Spaces and tabs are taken from the original file.

3.11. Cheat Sheets and additional hints

For instructions on how to build your own version of the manual:

The documentation uses the AsciiDoc format. There are a number of guides that will help you to get started with using AsciiDoc:

For other resources, to gain familiarity with AsciiDoc, you can visit:

4. AMQP Integration

The AMQP Integration allows external systems to communicate with the event bus of OpenNMS Horizon and receive alarms via the AMQP protocol.

AMQP is standard messaging protocol supported by a number of brokers including ActiveMQ and QPID.

The integration is written using Camel + OSGi and has the following components:

  • Event Forwarder

  • Event Receiver

  • Alarm Northbounder

Custom filtering (i.e. which events to forward) and transformations (i.e. how the events are represented in the messages) can be used in each of the components. Generic implementations

The integration is written using Camel + OSGi and exposes interfaces through which events and alarms can be filtered and/or transformed. The features are described in detail bellow.

Each componenent can be configured and setup independently, i.e. you can choose to only forward alarms.

4.1. Event Forwarder

The event forwarder listens for all events on the internal event bus of OpenNMS Horizon. Events from the bus are sent to a Camel processor, which can filter or transform these, before being sent to the AMQP endpoint.

The event forwarer exposes the following properties via the org.opennms.features.amqp.eventforwarder pid:

Property Default Description

connectionUrl

amqp://guest:guest@onms/test?brokerlist=\'tcp://127.0.0.1:5672'

Used by the AMQPConnectionFactory. See ConnectionURL for a full list of options.

destination

amqp:OpenNMS-Exchange/opennms-routing-key

Target queue or topic. See AMQP for details.

processorName

default-event-forwarder-processor

Name org.apache.camel.Processor used to filter and/or format the events.

The default processor, the default-event-forwarder-processor, marshalls events to XML and does not perform any filtering. This means that when enabled, all events will be forwarded to the AMQP destination with XML strings as the message body.

4.1.1. Setup

Start by logging into a Karaf shell.

Update the properties with your deployment specific values:

config:edit org.opennms.features.amqp.eventforwarder
propset connectionUrl amqp://guest:guest@onms/test?brokerlist=\'tcp://127.0.0.1:5672\'
propset destination amqp:OpenNMS-Exchange/opennms-routing-key
propset processorName default-event-forwarder-processor
config:update

Install the feature:

features:install opennms-amqp-event-forwarder

4.1.2. Debugging

You can get detailed information on the Camel route using:

camel:route-info forwardEvent

4.2. Event Receiver

The event receiver listens for messages from an AMQP target and forwards them onto the internal event bus of OpenNMS Horizon. Messages are sent to a Camel processor, which can filter or transform these, before being sent onto the event bus.

The event forwarer exposes the following properties via the org.opennms.features.amqp.eventreceiver pid:

Property Default Description

connectionUrl

amqp://guest:guest@onms/test?brokerlist=\'tcp://127.0.0.1:5672'

Used by the AMQPConnectionFactory. See ConnectionURL for a full list of options.

source

amqp:OpenNMS-Queue

Source queue or topic. See AMQP for details.

processorName

default-event-receiver-processor

Name org.apache.camel.Processor used to filter and/or format the events.

The default processor, the default-event-receiver-processor, expects the message bodies to contain XML strings which are it unmarshalls to events.

4.2.1. Setup

Start by logging into a Karaf shell.

Update the properties with your deployment specific values:

config:edit org.opennms.features.amqp.eventreceiver
propset connectionUrl amqp://guest:guest@onms/test?brokerlist=\'tcp://127.0.0.1:5672\'
propset source amqp:OpenNMS-Queue
propset processorName default-event-receiver-processor
config:update

Install the feature:

features:install opennms-amqp-event-receiver

4.2.2. Debugging

You can get detailed information on the Camel route using:

camel:route-info receiveEvent

4.3. Alarm Northbounder

The alarm northbounder listens for all northbound alarms. Alarms are sent to a Camel processor, which can filter or transform these, before being sent to the AMQP endpoint.

The alarm northbounder exposes the following properties via the org.opennms.features.amqp.alarmnorthbounder pid:

Property Default Description

connectionUrl

amqp://guest:guest@onms/test?brokerlist=\'tcp://127.0.0.1:5672'

Used by the AMQPConnectionFactory. See ConnectionURL for a full list of options.

destination

amqp:OpenNMS-Exchange/opennms-routing-key

Target queue or topic. See AMQP for details.

processorName

default-alarm-northbounder-processor

Name org.apache.camel.Processor used to filter and/or format the events.

The default processor, the default-alarm-northbounder-processor, convets the alarms to a string and does not perform any filtering. This means that when enabled, all alarms will be forwarded to the AMQP destination with strings as the message body.

4.3.1. Setup

Start by logging into a Karaf shell.

Update the properties with your deployment specific values:

config:edit org.opennms.features.amqp.alarmnorthbounder
propset connectionUrl amqp://guest:guest@onms/test?brokerlist=\'tcp://127.0.0.1:5672\'
propset destination amqp:OpenNMS-Exchange/opennms-routing-key
propset processorName default-alarm-northbounder-processor
config:update

Install the feature:

features:install opennms-amqp-alarm-northbounder

4.3.2. Debugging

You can get detailed information on the Camel route using:

camel:route-info forwardAlarm

4.4. Custom Processors

If your integration requires specific filtering and or formatting, you can write your own processor by implementing the org.apache.camel.Processor interface.

For example, we can implement a custom processor used for event forwarding:

import org.apache.camel.Exchange;
import org.apache.camel.Processor;

public class MyEventProcessor implements Processor {
    @Override
    public void process(final Exchange exchange) throws Exception {
        final Event event = exchange.getIn().getBody(Event.class);

        // Filtering
        if (!shouldForward(event)) {
            exchange.setProperty(Exchange.ROUTE_STOP, Boolean.TRUE);
            return;
        }

        // Transforming
        MyDTO eventAsDTO = toDTO(event);
        exchange.getIn().setBody(eventAsDTO, MyDTO.class);
    }
}

In order to use the processor, package it as a bundle, and expose it to the OSGi service registiry using:

<bean id="myEventProcessor" class="org.opennms.integrations.evilcorp.MyEventProcessor" />

<service id="myEventProcessorService" ref="myEventProcessor" interface="org.apache.camel.Processor">
  <service-properties>
    <entry key="name" value="evilcorp-event-forwarder-processor"/>
  </service-properties>
</service>

Once your bundle in the Karaf container, you can update the loaded you can refer to your processor with:

config:edit org.opennms.features.amqp.eventforwarder
propset processorName evilcorp-event-forwarder-processor
config:update

If the event forwarder feature was already started, it should automatically restart and start using the new processor. Otherwise, you can start the feature with:

feature:install opennms-amqp-event-forwarder