Integrating with Provisiond

If you have another inventory system to keep track of nodes on your network, you can define a requisition to group nodes within Meridian. There are multiple ways you can add nodes to a requisition. One way is to use the REST API to automate syncing nodes from your inventory system. The ReST API provides an endpoint for defining foreign sources and requisitions.

Provisioning a group of nodes

Just as with the web UI, groups of nodes can be managed via the ReST API from an external system. The steps are:

Update the default foreign source definition (if not using the default) for the group.
Update the SNMP configuration for each node in the group as needed.
Create/update the group of nodes.

Example provisioning via REST API

Step 1 - Create a foreign source

To define the policies for this group of nodes, you need to create a foreign source for the group. Use the foreign sources REST API to do so:

You can embed the XML in the curl command with option -d or reference it from a file if you use @ prefix with the file name, as in this case.

Sample XML file customer-a.foreign-source.xml:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<foreign-source date-stamp="2009-10-12T17:26:11.616-04:00" name="customer-a" xmlns="http://xmlns.opennms.org/xsd/config/foreign-source">
    <scan-interval>1d</scan-interval>
    <detectors>
        <detector class="org.opennms.netmgt.provision.detector.icmp.IcmpDetector" name="ICMP"/>
        <detector class="org.opennms.netmgt.provision.detector.snmp.SnmpDetector" name="SNMP"/>
    </detectors>
    <policies>
        <policy class="org.opennms.netmgt.provision.persist.policies.MatchingIpInterfacePolicy" name="no-192-168">
            <parameter value="UNMANAGE" key="action"/>
            <parameter value="ALL_PARAMETERS" key="matchBehavior"/>
            <parameter value="~^192\.168\..*" key="ipAddress"/>
        </policy>
    </policies>
</foreign-source>

Here is an example curl command to create the foreign source with the above foreign source specification:

curl -v -u admin:admin -X POST -H 'Content-type: application/xml' -d '@customer-a.foreign-source.xml' http://localhost:8980/opennms/rest/foreignSources

Step 2 - Update the SNMP configuration

The snmpConfig endpoint only supports a PUT request because it is an implied "update" of the configuration since it requires an IP address, and all IPs have a default configuration. This request is is passed to the SNMP configuration factory in Meridian for optimization of the configuration store snmp-config.xml. This example changes the community string for the IP address 10.1.1.1 to yRuSonoZ.

Community string is the only required element.

curl -v -u admin:admin -X PUT -H "Content-Type: application/xml" -H "Accept: application/xml" -d "<snmp-info><community>yRuSonoZ</community><port>161</port><retries>1</retries><timeout>2000</timeout><version>v2c</version></snmp-info>" http://localhost:8980/opennms/rest/snmpConfig/10.1.1.1

Step 3 - Create/Update the Requisition

This example adds 2 nodes to the requisition customer-a. The foreign source must match the name of the requisition. In the following example, the requisitions REST API automatically creates a requisition based on the value of the foreign-source attribute specified in the XML requisition.

curl -v -u admin:admin -X POST -H "Content-Type: application/xml" -d '<?xml version="1.0" encoding="UTF-8"?><model-import xmlns="http://xmlns.opennms.org/xsd/config/model-import" date-stamp="2009-03-07T17:56:53.123-05:00" last-import="2009-03-07T17:56:53.117-05:00" foreign-source="customer-a"><node node-label="p-brane" foreign-id="1" ><interface ip-addr="10.0.1.3" descr="en1" status="1" snmp-primary="P"><monitored-service service-name="ICMP"/><monitored-service service-name="SNMP"/></interface><category name="Production"/><category name="Routers"/></node><node node-label="m-brane" foreign-id="2" ><interface ip-addr="10.0.1.4" descr="en1" status="1" snmp-primary="P"><monitored-service service-name="ICMP"/><monitored-service service-name="SNMP"/></interface><category name="Production"/><category name="Routers"/></node></model-import>' http://localhost:8980/opennms/rest/requisitions

A requisition file called etc/imports/customer-a.xml will be found on the Meridian system following the successful completion of this curl command and will also be visible via the Web UI.

Before the requisition’s nodes are populated into the database, Provisiond needs to perform an import (also referred to as synchronization). Here is an example using the curl command to import the requisition:

curl -v -u admin:admin -X PUT http://localhost:8980/opennms/rest/requisitions/customer-a/import

The REST API handles Add, Update, and Delete operations in the same manner as described in the REST API documentation.