20.5. 取消置备和删除 Controller 节点

流程

1. Source stackrc 文件：

   $ source ~/stackrc

2. 确定 overcloud-controller-0 节点的 UUID：

   (undercloud)$ NODE=$(metalsmith -c UUID -f value show overcloud-controller-0)

3. 把节点设为维护模式：

   $ openstack baremetal node maintenance set $NODE

4. 复制 overcloud-baremetal-deploy.yaml 文件：

   $ cp /home/stack/templates/overcloud-baremetal-deploy.yaml /home/stack/templates/unprovision_controller-0.yaml

5. 在 unprovision_controller-0.yaml 文件中，降低 Controller 数量来取消置备您要替换的 Controller 节点。在本例中，计数从 3 减少到 2。将 controller-0 节点移到 实例 字典中，并将 provisioned 参数设置为 false ：

   - name: Controller
     count: 2
     hostname_format: controller-%index%
     defaults:
       resource_class: BAREMETAL.controller
       networks:
         [ ... ]
     instances:
     - hostname: controller-0
       name: <IRONIC_NODE_UUID_or_NAME>
       provisioned: false
   - name: Compute
     count: 2
     hostname_format: compute-%index%
     defaults:
       resource_class: BAREMETAL.compute
       networks:
         [ ... ]

6. 运行 node unprovision 命令：

   $ openstack overcloud node delete \
     --stack overcloud \
     --baremetal-deployment /home/stack/templates/unprovision_controller-0.yaml

   The following nodes will be unprovisioned:
   +--------------+-------------------------+--------------------------------------+
   | hostname     | name                    | id                                   |
   +--------------+-------------------------+--------------------------------------+
   | controller-0 | baremetal-35400-leaf1-2 | b0d5abf7-df28-4ae7-b5da-9491e84c21ac |
   +--------------+-------------------------+--------------------------------------+
   
   Are you sure you want to unprovision these overcloud nodes and ports [y/N]?