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13.6. 使用 GitOps ZTP 将 worker 节点添加到单节点 OpenShift 集群

13.6. 使用 GitOps ZTP 将 worker 节点添加到单节点 OpenShift 集群

您可以将一个或多个 worker 节点添加到现有的单节点 OpenShift 集群，以增加集群中的可用 CPU 资源。

先决条件

在 OpenShift Container Platform 4.11 或更高版本的裸机 hub 集群中安装和配置 RHACM 2.6 或更高版本
在 hub 集群中安装 Topology Aware Lifecycle Manager
在 hub 集群中安装 Red Hat OpenShift GitOps
使用 GitOps ZTP ztp-site-generate 容器镜像版本 4.12 或更高版本
使用 GitOps ZTP 部署受管单节点 OpenShift 集群
配置中央基础架构管理，如 RHACM 文档所述
配置 DNS 服务集群来解析内部 API 端点 api-int.<cluster_name>.<base_domain>

流程

如果您使用 example-sno.yaml SiteConfig 清单部署集群，请将新的 worker 节点添加到 spec.clusters['example-sno'].nodes 列表中：

nodes:
- hostName: "example-node2.example.com"
  role: "worker"
  bmcAddress: "idrac-virtualmedia+https://[1111:2222:3333:4444::bbbb:1]/redfish/v1/Systems/System.Embedded.1"
  bmcCredentialsName:
    name: "example-node2-bmh-secret"
  bootMACAddress: "AA:BB:CC:DD:EE:11"
  bootMode: "UEFI"
  nodeNetwork:
    interfaces:
      - name: eno1
        macAddress: "AA:BB:CC:DD:EE:11"
    config:
      interfaces:
        - name: eno1
          type: ethernet
          state: up
          macAddress: "AA:BB:CC:DD:EE:11"
          ipv4:
            enabled: false
          ipv6:
            enabled: true
            address:
            - ip: 1111:2222:3333:4444::1
              prefix-length: 64
      dns-resolver:
        config:
          search:
          - example.com
          server:
          - 1111:2222:3333:4444::2
      routes:
        config:
        - destination: ::/0
          next-hop-interface: eno1
          next-hop-address: 1111:2222:3333:4444::1
          table-id: 254

nodes:
- hostName: "example-node2.example.com"
  role: "worker"
  bmcAddress: "idrac-virtualmedia+https://[1111:2222:3333:4444::bbbb:1]/redfish/v1/Systems/System.Embedded.1"
  bmcCredentialsName:
    name: "example-node2-bmh-secret"
  bootMACAddress: "AA:BB:CC:DD:EE:11"
  bootMode: "UEFI"
  nodeNetwork:
    interfaces:
      - name: eno1
        macAddress: "AA:BB:CC:DD:EE:11"
    config:
      interfaces:
        - name: eno1
          type: ethernet
          state: up
          macAddress: "AA:BB:CC:DD:EE:11"
          ipv4:
            enabled: false
          ipv6:
            enabled: true
            address:
            - ip: 1111:2222:3333:4444::1
              prefix-length: 64
      dns-resolver:
        config:
          search:
          - example.com
          server:
          - 1111:2222:3333:4444::2
      routes:
        config:
        - destination: ::/0
          next-hop-interface: eno1
          next-hop-address: 1111:2222:3333:4444::1
          table-id: 254

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为新主机创建一个 BMC 身份验证 secret，如 SiteConfig 文件的 spec.nodes 部分中的 bmcCredentialsName 字段引用：

apiVersion: v1
data:
  password: "password"
  username: "username"
kind: Secret
metadata:
  name: "example-node2-bmh-secret"
  namespace: example-sno
type: Opaque

apiVersion: v1
data:
  password: "password"
  username: "username"
kind: Secret
metadata:
  name: "example-node2-bmh-secret"
  namespace: example-sno
type: Opaque

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提交 Git 中的更改，然后推送到由 GitOps ZTP ArgoCD 应用程序监控的 Git 存储库。
当 ArgoCD cluster 应用程序同步时，由 GitOps ZTP 插件生成的 hub 集群中会出现两个新清单：
- BareMetalHost
- NMStateConfig
  重要
  不应为 worker 节点配置 cpuset 字段。worker 节点的工作负载分区会在节点安装完成后通过管理策略添加。

验证

您可以通过几种方法监控安装过程。

运行以下命令，检查预置备镜像是否已创建：

oc get ppimg -n example-sno

$ oc get ppimg -n example-sno

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输出示例

NAMESPACE       NAME            READY   REASON
example-sno     example-sno     True    ImageCreated
example-sno     example-node2   True    ImageCreated

NAMESPACE       NAME            READY   REASON
example-sno     example-sno     True    ImageCreated
example-sno     example-node2   True    ImageCreated

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检查裸机主机的状态：

oc get bmh -n example-sno

$ oc get bmh -n example-sno

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输出示例

NAME            STATE          CONSUMER   ONLINE   ERROR   AGE
example-sno     provisioned               true             69m
example-node2   provisioning              true             4m50s

NAME            STATE          CONSUMER   ONLINE   ERROR   AGE
example-sno     provisioned               true             69m
example-node2   provisioning              true             4m50s

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1: provisioning 状态表示从安装介质引导的节点正在进行中。

持续监控安装过程：

运行以下命令监控代理安装过程：

oc get agent -n example-sno --watch

$ oc get agent -n example-sno --watch

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输出示例

NAME                                   CLUSTER   APPROVED   ROLE     STAGE
671bc05d-5358-8940-ec12-d9ad22804faa   example-sno   true       master   Done
[...]
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Starting installation
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Installing
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Writing image to disk
[...]
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Waiting for control plane
[...]
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Rebooting
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Done

NAME                                   CLUSTER   APPROVED   ROLE     STAGE
671bc05d-5358-8940-ec12-d9ad22804faa   example-sno   true       master   Done
[...]
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Starting installation
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Installing
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Writing image to disk
[...]
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Waiting for control plane
[...]
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Rebooting
14fd821b-a35d-9cba-7978-00ddf535ff37   example-sno   true       worker   Done

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当 worker 节点安装完成后，worker 节点证书会被自动批准。此时，worker 会出现在 ManagedClusterInfo 状态中。运行以下命令查看状态：

oc get managedclusterinfo/example-sno -n example-sno -o \
jsonpath='{range .status.nodeList[*]}{.name}{"\t"}{.conditions}{"\t"}{.labels}{"\n"}{end}'

$ oc get managedclusterinfo/example-sno -n example-sno -o \
jsonpath='{range .status.nodeList[*]}{.name}{"\t"}{.conditions}{"\t"}{.labels}{"\n"}{end}'

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输出示例

example-sno	[{"status":"True","type":"Ready"}]	{"node-role.kubernetes.io/master":"","node-role.kubernetes.io/worker":""}
example-node2	[{"status":"True","type":"Ready"}]	{"node-role.kubernetes.io/worker":""}

example-sno	[{"status":"True","type":"Ready"}]	{"node-role.kubernetes.io/master":"","node-role.kubernetes.io/worker":""}
example-node2	[{"status":"True","type":"Ready"}]	{"node-role.kubernetes.io/worker":""}

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返回顶部

13.6. 使用 GitOps ZTP 将 worker 节点添加到单节点 OpenShift 集群

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