Linux Pacemaker Cluster discovery

The ServiceNow Discovery application uses the Linux Pacemaker Cluster discovery pattern to find high-availability cluster data and populate the CMDB with the discovered information. Discovering some of these resources may require updating to the latest version of the Discovery and Service Mapping Patterns application from the ServiceNow Store.

This pattern is an extension section of the Linux Server pattern. Discovery uses the pattern to run horizontal discovery.

You can use this pattern on the ServiceNow AI Platform® using the Madrid release or later.

Request apps on the Store

Visit the ServiceNow Store to view all the available apps, and for information about submitting requests to the store. For cumulative release notes information for all released apps, see the ServiceNow Store version history release notes.

Prerequisites

• Configure SSH credentials for the Linux server.
• Provide a user with permissions to read the following files:
  • /etc/hosts
  • /etc/corosync/corosync.conf
  • /var/lib/heartbeat/crm/cib.xml, or /var/lib/pacemaker/cib/cib.xml from Linux SP3

• Provide a user with permissions to run the following commands:

  ps -ef | grep corosync | grep -v grep

  ps -ef | grep pacemaker | grep -v grep

  ifconfig | grep 'inet addr:' |awk '{print $1, $2 }'

  hostname -s

  hostname -f

Data collected by Discovery during horizontal discovery

The discovered data includes the following tables and fields.

The Dependency Views map shows discovered load balancer CIs and the relationships between them.

CI relationships

These relationships are created to support Linux Pacemaker Cluster discovery:

Parent Topic:Available on-premise discovery patterns