25.5. 配置带有隔离和资源的高可用性集群

流程

1. 创建一个指定集群中节点的清单文件，如在 为 ha_cluster 系统角色指定一个清单 中所述。

2. 创建一个 playbook 文件，如 new-cluster.yml。

   注意

   为生产环境创建 playbook 文件时，vault 会加密密码，如在 使用 Ansible Vault 加密内容 中所述。

   以下示例 playbook 文件配置一个运行 firewalld 和 selinux 服务的集群。集群包括隔离、多个资源和资源组。它还包含资源组的资源克隆。

   - hosts: node1 node2
     vars:
       ha_cluster_cluster_name: my-new-cluster
       ha_cluster_hacluster_password: password
       ha_cluster_manage_firewall: true
       ha_cluster_manage_selinux: true
       ha_cluster_resource_primitives:
         - id: xvm-fencing
           agent: 'stonith:fence_xvm'
           instance_attrs:
             - attrs:
                 - name: pcmk_host_list
                   value: node1 node2
         - id: simple-resource
           agent: 'ocf:pacemaker:Dummy'
         - id: resource-with-options
           agent: 'ocf:pacemaker:Dummy'
           instance_attrs:
             - attrs:
                 - name: fake
                   value: fake-value
                 - name: passwd
                   value: passwd-value
           meta_attrs:
             - attrs:
                 - name: target-role
                   value: Started
                 - name: is-managed
                   value: 'true'
           operations:
             - action: start
               attrs:
                 - name: timeout
                   value: '30s'
             - action: monitor
               attrs:
                 - name: timeout
                   value: '5'
                 - name: interval
                   value: '1min'
         - id: dummy-1
           agent: 'ocf:pacemaker:Dummy'
         - id: dummy-2
           agent: 'ocf:pacemaker:Dummy'
         - id: dummy-3
           agent: 'ocf:pacemaker:Dummy'
         - id: simple-clone
           agent: 'ocf:pacemaker:Dummy'
         - id: clone-with-options
           agent: 'ocf:pacemaker:Dummy'
       ha_cluster_resource_groups:
         - id: simple-group
           resource_ids:
             - dummy-1
             - dummy-2
           meta_attrs:
             - attrs:
                 - name: target-role
                   value: Started
                 - name: is-managed
                   value: 'true'
         - id: cloned-group
           resource_ids:
             - dummy-3
       ha_cluster_resource_clones:
         - resource_id: simple-clone
         - resource_id: clone-with-options
           promotable: yes
           id: custom-clone-id
           meta_attrs:
             - attrs:
                 - name: clone-max
                   value: '2'
                 - name: clone-node-max
                   value: '1'
         - resource_id: cloned-group
           promotable: yes
   
     roles:
       - rhel-system-roles.ha_cluster

3. 保存该文件。

4. 运行 playbook，指定在第 1 步中创建的清单文件清单的路径。

   # ansible-playbook -i inventory new-cluster.yml