16.3. 使用基于镜像的安装预安装单节点 OpenShift

流程

1. 创建实时安装 ISO 并嵌入您的单节点 OpenShift seed 镜像 URL 和其他安装工件：

   1. 运行以下命令来创建工作目录：

      $ mkdir ibi-iso-workdir 1

      1

      将 ibi-iso-workdir 替换为工作目录的名称。

   2. 可选。在配置 ImageBasedInstallationConfig 资源时，创建安装配置模板以用作参考：

      $ openshift-install image-based create image-config-template --dir ibi-iso-workdir 1

      1

      如果没有指定工作目录，命令将使用当前目录。

      输出示例

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

      该命令在目标目录中创建 image-based-installation-config.yaml 安装配置模板：

      #
      # Note: This is a sample ImageBasedInstallationConfig file showing
      # which fields are available to aid you in creating your
      # own image-based-installation-config.yaml file.
      #
      apiVersion: v1beta1
      kind: ImageBasedInstallationConfig
      metadata:
        name: example-image-based-installation-config
      # The following fields are required
      seedImage: quay.io/openshift-kni/seed-image:4.17.0
      seedVersion: 4.17.0
      installationDisk: /dev/vda
      pullSecret: '<your_pull_secret>'
      # networkConfig is optional and 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

   3. 编辑安装配置文件：

      image-based-installation-config.yaml 示例文件

      apiVersion: v1beta1
      kind: ImageBasedInstallationConfig
      metadata:
        name: example-image-based-installation-config
      seedImage: quay.io/repo-id/seed:latest
      seedVersion: "4.17.0"
      extraPartitionStart: "-240G"
      installationDisk: /dev/disk/by-id/wwn-0x62c...
      sshKey: 'ssh-ed25519 AAAA...'
      pullSecret: '{"auths": ...}'
      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

   4. 运行以下命令来创建实时安装 ISO：

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

      输出示例

      INFO Consuming Image-based Installation ISO Config from target directory
      INFO Creating Image-based Installation ISO with embedded ignition

验证

1. 登录到目标主机。

2. 运行以下命令来查看系统日志：

   $ journalctl -b

   输出示例

   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13T17:01:44Z" level=info msg="All the precaching threads have finished."
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13T17:01:44Z" level=info msg="Total Images: 125"
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13T17:01:44Z" level=info msg="Images Pulled Successfully: 125"
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13T17:01:44Z" level=info msg="Images Failed to Pull: 0"
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13T17:01:44Z" level=info msg="Completed executing pre-caching"
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13T17:01:44Z" level=info msg="Pre-cached images successfully."
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13 17:01:44" level=info msg="Skipping shutdown"
   Aug 13 17:01:44 10.46.26.129 install-rhcos-and-restore-seed.sh[2876]: time="2024-08-13 17:01:44" level=info msg="IBI preparation process finished successfully!"
   Aug 13 17:01:44 10.46.26.129 systemd[1]: var-lib-containers-storage-overlay.mount: Deactivated successfully.
   Aug 13 17:01:44 10.46.26.129 systemd[1]: Finished SNO Image-based Installation.
   Aug 13 17:01:44 10.46.26.129 systemd[1]: Reached target Multi-User System.
   Aug 13 17:01:44 10.46.26.129 systemd[1]: Reached target Graphical Interface.