Chapter 14. Understanding the node_replace_inventory.yml file

The node_replace_inventory.yml file is an example Ansible inventory file that you can use to prepare a replacement host for your Red Hat Hyperconverged Infrastructure for Virtualization cluster.

You can find this file at /etc/ansible/roles/gluster.ansible/playbooks/hc-ansible-deployment/node_replace_inventory.yml on any hyperconverged host.

14.1. Configuration parameters for node replacement

hosts (required)

Defines one active host in the cluster using the back-end FQDN. 

cluster_nodes:
  hosts:
    host2-backend-fqdn.example.com:
  vars:
    [common host configuration]
gluster_maintenance_old_node (required)

Defines the backend FQDN of the node being replaced. 

cluster_nodes:
  hosts:
    host2-backend-fqdn.example.com:
  vars:
    gluster_maintenance_old_node: host1-backend-fqdn.example.com
gluster_maintenance_new_node (required)

Defines the backend FQDN of the replacement node. 

cluster_nodes:
  hosts:
    host2-backend-fqdn.example.com:
  vars:
    gluster_maintenance_new_node: new-host-backend-fqdn.example.com
gluster_maintenance_cluster_node (required)

An active node in the cluster. Cannot be the same as gluster_maintenance_cluster_node_2. 

cluster_nodes:
  hosts:
    host2-backend-fqdn.example.com:
  vars:
    gluster_maintenance_cluster_node: host2-backend-fqdn.example.com
gluster_maintenance_cluster_node_2 (required)

An active node in the cluster. Cannot be the same as gluster_maintenance_cluster_node. 

cluster_nodes:
  hosts:
    host2-backend-fqdn.example.com:
  vars:
    gluster_maintenance_cluster_node_2: host3-backend-fqdn.example.com

14.2. Example node_replace_inventory.yml

cluster_node:
  hosts:
   host2-backend-fqdn.example.com:

  vars:
    gluster_maintenance_old_node: host1-backend-fqdn.example.com
    gluster_maintenance_new_node: new-host-backend-fqdn.example.com
    gluster_maintenance_cluster_node: host2-backend-fqdn.example.com
    gluster_maintenance_cluster_node_2: host3-backend-fqdn.example.com