10.10. 配置 Image Registry Operator 以进行镜像的本地缓存

流程

1. 使用以下示例 YAML 文件创建 storage.bu 文件：

   variant: fcos
   version: 1.3.0
   storage:
     disks:
     - device: /dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0 1
       wipe_table: false
       partitions:
       - label: var-lib-containers
         start_mib: <start_of_partition> 2
         size_mib: <partition_size> 3
     filesystems:
       - path: /var/lib/containers
         device: /dev/disk/by-partlabel/var-lib-containers
         format: xfs
         wipe_filesystem: true
         with_mount_unit: true
         mount_options:
           - defaults
           - prjquota

   1

   指定根磁盘。

   2

   以 MiB 为单位指定分区的起始位置。如果值太小，安装会失败。

   3

   指定分区的大小。如果值太小，部署会失败。

2. 运行以下命令，将 storage.bu 转换为 Ignition 文件：

   $ butane storage.bu

   输出示例

   {"ignition":{"version":"3.2.0"},"storage":{"disks":[{"device":"/dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0","partitions":[{"label":"var-lib-containers","sizeMiB":0,"startMiB":250000}],"wipeTable":false}],"filesystems":[{"device":"/dev/disk/by-partlabel/var-lib-containers","format":"xfs","mountOptions":["defaults","prjquota"],"path":"/var/lib/containers","wipeFilesystem":true}]},"systemd":{"units":[{"contents":"# # Generated by Butane\n[Unit]\nRequires=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\nAfter=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\n\n[Mount]\nWhere=/var/lib/containers\nWhat=/dev/disk/by-partlabel/var-lib-containers\nType=xfs\nOptions=defaults,prjquota\n\n[Install]\nRequiredBy=local-fs.target","enabled":true,"name":"var-lib-containers.mount"}]}}

3. 使用 JSON Pretty Print 等工具将输出转换为 JSON 格式。

4. 将输出复制到 SiteConfig CR 中的 .spec.clusters.nodes.ignitionConfigOverride 字段中。

   Example

   [...]
   spec:
     clusters:
       - nodes:
           - ignitionConfigOverride: |
             {
               "ignition": {
                 "version": "3.2.0"
               },
               "storage": {
                 "disks": [
                   {
                     "device": "/dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0",
                     "partitions": [
                       {
                         "label": "var-lib-containers",
                         "sizeMiB": 0,
                         "startMiB": 250000
                       }
                     ],
                     "wipeTable": false
                   }
                 ],
                 "filesystems": [
                   {
                     "device": "/dev/disk/by-partlabel/var-lib-containers",
                     "format": "xfs",
                     "mountOptions": [
                       "defaults",
                       "prjquota"
                     ],
                     "path": "/var/lib/containers",
                     "wipeFilesystem": true
                   }
                 ]
               },
               "systemd": {
                 "units": [
                   {
                     "contents": "# # Generated by Butane\n[Unit]\nRequires=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\nAfter=systemd-fsck@dev-disk-by\\x2dpartlabel-var\\x2dlib\\x2dcontainers.service\n\n[Mount]\nWhere=/var/lib/containers\nWhat=/dev/disk/by-partlabel/var-lib-containers\nType=xfs\nOptions=defaults,prjquota\n\n[Install]\nRequiredBy=local-fs.target",
                     "enabled": true,
                     "name": "var-lib-containers.mount"
                   }
                 ]
               }
             }
   [...]

   注意

   如果 .spec.clusters.nodes.ignitionConfigOverride 字段不存在，请创建它。

验证

1. 在安装过程中，运行以下命令来在 hub 集群上验证 BareMetalHost 对象显示注解：

   $ oc get bmh -n my-sno-ns my-sno -ojson | jq '.metadata.annotations["bmac.agent-install.openshift.io/ignition-config-overrides"]

   输出示例

   "{\"ignition\":{\"version\":\"3.2.0\"},\"storage\":{\"disks\":[{\"device\":\"/dev/disk/by-id/wwn-0x6b07b250ebb9d0002a33509f24af1f62\",\"partitions\":[{\"label\":\"var-lib-containers\",\"sizeMiB\":0,\"startMiB\":250000}],\"wipeTable\":false}],\"filesystems\":[{\"device\":\"/dev/disk/by-partlabel/var-lib-containers\",\"format\":\"xfs\",\"mountOptions\":[\"defaults\",\"prjquota\"],\"path\":\"/var/lib/containers\",\"wipeFilesystem\":true}]},\"systemd\":{\"units\":[{\"contents\":\"# Generated by Butane\\n[Unit]\\nRequires=systemd-fsck@dev-disk-by\\\\x2dpartlabel-var\\\\x2dlib\\\\x2dcontainers.service\\nAfter=systemd-fsck@dev-disk-by\\\\x2dpartlabel-var\\\\x2dlib\\\\x2dcontainers.service\\n\\n[Mount]\\nWhere=/var/lib/containers\\nWhat=/dev/disk/by-partlabel/var-lib-containers\\nType=xfs\\nOptions=defaults,prjquota\\n\\n[Install]\\nRequiredBy=local-fs.target\",\"enabled\":true,\"name\":\"var-lib-containers.mount\"}]}}"

2. 安装后，检查单节点 OpenShift 磁盘状态。

   1. 运行以下命令，在单节点 OpenShift 节点上进入 debug 会话。

      此步骤被实例化为一个名为 <node_name>-debug 的 debug pod:

      $ oc debug node/my-sno-node

      1. 运行以下命令，将 /host 设置为 debug shell 中的根目录。

         debug pod 在 pod 中的 /host 中挂载主机的 root 文件系统。将根目录改为 /host，您可以运行主机可执行路径中包含的二进制文件：

         # chroot /host

      2. 运行以下命令，列出所有可用块设备的信息：

         # lsblk

         输出示例

         NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINTS
         sda      8:0    0 446.6G  0 disk
         ├─sda1   8:1    0     1M  0 part
         ├─sda2   8:2    0   127M  0 part
         ├─sda3   8:3    0   384M  0 part /boot
         ├─sda4   8:4    0 243.6G  0 part /var
         │                                /sysroot/ostree/deploy/rhcos/var
         │                                /usr
         │                                /etc
         │                                /
         │                                /sysroot
         └─sda5   8:5    0 202.5G  0 part /var/lib/containers

      3. 运行以下命令，显示文件系统磁盘空间使用情况的信息：

         # df -h

         输出示例

         Filesystem      Size  Used Avail Use% Mounted on
         devtmpfs        4.0M     0  4.0M   0% /dev
         tmpfs           126G   84K  126G   1% /dev/shm
         tmpfs            51G   93M   51G   1% /run
         /dev/sda4       244G  5.2G  239G   3% /sysroot
         tmpfs           126G  4.0K  126G   1% /tmp
         /dev/sda5       203G  119G   85G  59% /var/lib/containers
         /dev/sda3       350M  110M  218M  34% /boot
         tmpfs            26G     0   26G   0% /run/user/1000

流程

1. 在适当的 PolicyGenTemplate CR 中配置存储类、持久性卷声明、持久性卷和镜像 registry 配置。例如，要配置单个站点，请将以下 YAML 添加到文件 example-sno-site.yaml 中：

   sourceFiles:
     # storage class
     - fileName: StorageClass.yaml
       policyName: "sc-for-image-registry"
       metadata:
         name: image-registry-sc
         annotations:
           ran.openshift.io/ztp-deploy-wave: "100" 1
     # persistent volume claim
     - fileName: StoragePVC.yaml
       policyName: "pvc-for-image-registry"
       metadata:
         name: image-registry-pvc
         namespace: openshift-image-registry
         annotations:
           ran.openshift.io/ztp-deploy-wave: "100"
       spec:
         accessModes:
           - ReadWriteMany
         resources:
           requests:
             storage: 100Gi
         storageClassName: image-registry-sc
         volumeMode: Filesystem
     # persistent volume
     - fileName: ImageRegistryPV.yaml 2
       policyName: "pv-for-image-registry"
       metadata:
         annotations:
           ran.openshift.io/ztp-deploy-wave: "100"
     - fileName: ImageRegistryConfig.yaml
       policyName: "config-for-image-registry"
       complianceType: musthave
       metadata:
         annotations:
           ran.openshift.io/ztp-deploy-wave: "100"
       spec:
         storage:
           pvc:
             claim: "image-registry-pvc"

   1

   根据您要在站点、通用或组级别配置镜像 registry，为 ztp-deploy-wave 设置适当的值。ZTP-deploy-wave: "100" 适用于开发或测试，因为它允许您将引用的源文件分组到一起。

   2

   在 ImageRegistryPV.yaml 中，确保将 spec.local.path 字段设置为 /var/imageregistry，以匹配 SiteConfig CR 中为 mount_point 字段设置的值。

   重要

   不要为 - fileName: ImageRegistryConfig.yaml 配置设置 complianceType: mustonlyhave。这可能导致 registry pod 部署失败。

2. 提交 Git 中的 PolicyGenTemplate 更改，然后推送到由 GitOps ZTP Argo CD 应用程序监控的 Git 存储库。