第11章 Configuring a high-availability cluster by using the ha_cluster system role

When configuring an HA cluster using the ha_cluster system role playbook, you configure the names and addresses of the nodes for the cluster in an inventory.

For each node in an inventory, you can optionally specify the following items:

The following example shows an inventory with targets node1 and node2. node1 and node2 must be either fully qualified domain names or must otherwise be able to connect to the nodes as when, for example, the names are resolvable through the /etc/hosts file.

all:
  hosts:
    node1:
      ha_cluster:
        node_name: node-A
        pcs_address: node1-address
        corosync_addresses:
          - 192.168.1.11
          - 192.168.2.11
    node2:
      ha_cluster:
        node_name: node-B
        pcs_address: node2-address:2224
        corosync_addresses:
          - 192.168.1.12
          - 192.168.2.12

You can optionally configure watchdog and SBD devices for each node in an inventory. All SBD devices must be shared to and accessible from all nodes. Watchdog devices can be different for each node as well. For an example procedure that configures SBD node fencing in an inventory file, see Configuring a high availability cluster with SBD node fencing by using the ha_cluster variable.