16.4.2. 关于单节点 OpenShift 的基于镜像的部署

流程

1. 运行以下命令来创建工作目录：

   $ mkdir ibi-config-iso-workdir 

   1

   1

   将 ibi-config-iso-workdir 替换为工作目录的名称。

2. 创建安装清单：

   1. 创建定义 install-config 清单的 YAML 文件：

      install-config.yaml 文件示例

      apiVersion: v1
      metadata:
        name: sno-cluster-name
      baseDomain: host.example.com
      compute:
        - architecture: amd64
          hyperthreading: Enabled
          name: worker
          replicas: 0
      controlPlane:
        architecture: amd64
        hyperthreading: Enabled
        name: master
        replicas: 1
      networking:
        clusterNetwork:
        - cidr: 10.128.0.0/14
          hostPrefix: 23
        machineNetwork:
        - cidr: 192.168.200.0/24
        networkType: OVNKubernetes
        serviceNetwork:
        - 172.30.0.0/16
      platform:
        none: {}
      fips: false
      cpuPartitioningMode: "AllNodes"
      pullSecret: '{"auths":{"<your_pull_secret>"}}}'
      sshKey: 'ssh-rsa <your_ssh_pub_key>'

      重要

      如果您的集群部署需要代理配置，您必须执行以下操作：

      • 从带有代理配置的 seed 集群创建 seed 镜像。代理配置不必相互匹配。
      • 在安装清单中配置 machineNetwork 字段。
   2. 将文件保存到工作目录中。

3. 可选。运行以下命令，在工作目录中创建配置模板：

   $ openshift-install image-based create config-template --dir ibi-config-iso-workdir/

   输出示例

   INFO Config-Template created in: ibi-config-iso-workdir

   该命令在工作目录中创建 image-based-config.yaml 配置模板：

   #
   # Note: This is a sample ImageBasedConfig file showing
   # which fields are available to aid you in creating your
   # own image-based-config.yaml file.
   #
   apiVersion: v1beta1
   kind: ImageBasedConfig
   metadata:
     name: example-image-based-config
   additionalNTPSources:
     - 0.rhel.pool.ntp.org
     - 1.rhel.pool.ntp.org
   hostname: change-to-hostname
   releaseRegistry: quay.io
   # networkConfig contains the network configuration for the host in NMState format.
   # See https://nmstate.io/examples.html for examples.
   networkConfig:
     interfaces:
       - name: eth0
         type: ethernet
         state: up
         mac-address: 00:00:00:00:00:00
         ipv4:
           enabled: true
           address:
             - ip: 192.168.122.2
               prefix-length: 23
           dhcp: false

4. 编辑配置文件：

   image-based-config.yaml 文件示例

   #
   # Note: This is a sample ImageBasedConfig file showing
   # which fields are available to aid you in creating your
   # own image-based-config.yaml file.
   #
   apiVersion: v1beta1
   kind: ImageBasedConfig
   metadata:
     name: sno-cluster-name
   additionalNTPSources:
     - 0.rhel.pool.ntp.org
     - 1.rhel.pool.ntp.org
   hostname: host.example.com
   releaseRegistry: quay.io
   # networkConfig contains the network configuration for the host in NMState format.
   # See https://nmstate.io/examples.html for examples.
   networkConfig:
       interfaces:
         - name: ens1f0
           type: ethernet
           state: up
           ipv4:
             enabled: true
             dhcp: false
             auto-dns: false
             address:
               - ip: 192.168.200.25
                 prefix-length: 24
           ipv6:
             enabled: false
       dns-resolver:
         config:
           server:
             - 192.168.15.47
             - 192.168.15.48
       routes:
         config:
         - destination: 0.0.0.0/0
           metric: 150
           next-hop-address: 192.168.200.254
           next-hop-interface: ens1f0

5. 运行以下命令，在工作目录中创建配置 ISO：

   $ openshift-install image-based create config-image --dir ibi-config-iso-workdir/

   输出示例

   INFO Adding NMConnection file <ens1f0.nmconnection>
   INFO Consuming Install Config from target directory
   INFO Consuming Image-based Config ISO configuration from target directory
   INFO Config-Image created in: ibi-config-iso-workdir/auth

   查看工作目录中的输出：

   输出示例

   ibi-config-iso-workdir/
   ├── auth
   │   ├── kubeadmin-password
   │   └── kubeconfig
   └── imagebasedconfig.iso

6. 使用您首选的方法将 imagebasedconfig.iso 附加到预安装的主机，然后重新启动主机以完成配置过程并部署集群。

1. 运行以下命令，将 kubeconfig 环境变量导出到 kubeconfig 文件中：

   $ export KUBECONFIG=ibi-config-iso-workdir/auth/kubeconfig

2. 运行以下命令验证集群是否响应：

   $ oc get nodes

   输出示例

   NAME                                         STATUS   ROLES                  AGE     VERSION
   node/sno-cluster-name.host.example.com       Ready    control-plane,master   5h15m   v1.30.3