第 5 章 使用 GitOps ZTP 手动安装单节点 OpenShift 集群

流程

1. 运行以下命令来创建输出文件夹：

   $ mkdir -p ./out

2. 从 ztp-site-generate 容器镜像导出 argocd 目录：

   $ podman run --log-driver=none --rm registry.redhat.io/openshift4/ztp-site-generate-rhel8:v4.16 extract /home/ztp --tar | tar x -C ./out

   ./out 目录包含 out/argocd/example/ 文件夹中的参考 PolicyGenerator 和 SiteConfig CR。

   输出示例

   out
    └── argocd
         └── example
              ├── acmpolicygenerator
              │     ├── {policy-prefix}common-ranGen.yaml
              │     ├── {policy-prefix}example-sno-site.yaml
              │     ├── {policy-prefix}group-du-sno-ranGen.yaml
              │     ├── {policy-prefix}group-du-sno-validator-ranGen.yaml
              │     ├── ...
              │     ├── kustomization.yaml
              │     └── ns.yaml
              └── siteconfig
                     ├── example-sno.yaml
                     ├── KlusterletAddonConfigOverride.yaml
                     └── kustomization.yaml

3. 为站点安装 CR 创建输出文件夹：

   $ mkdir -p ./site-install

4. 为您要安装的集群类型修改示例 SiteConfig CR。将 example-sno.yaml 复制到 site-1-sno.yaml，并修改 CR 以匹配您要安装的站点和裸机主机的详情，例如：

   # example-node1-bmh-secret & assisted-deployment-pull-secret need to be created under same namespace example-sno
   ---
   apiVersion: ran.openshift.io/v1
   kind: SiteConfig
   metadata:
     name: "example-sno"
     namespace: "example-sno"
   spec:
     baseDomain: "example.com"
     pullSecretRef:
       name: "assisted-deployment-pull-secret"
     clusterImageSetNameRef: "openshift-4.16"
     sshPublicKey: "ssh-rsa AAAA..."
     clusters:
       - clusterName: "example-sno"
         networkType: "OVNKubernetes"
         # installConfigOverrides is a generic way of passing install-config
         # parameters through the siteConfig.  The 'capabilities' field configures
         # the composable openshift feature.  In this 'capabilities' setting, we
         # remove all the optional set of components.
         # Notes:
         # - OperatorLifecycleManager is needed for 4.15 and later
         # - NodeTuning is needed for 4.13 and later, not for 4.12 and earlier
         # - Ingress is needed for 4.16 and later
         installConfigOverrides: |
           {
             "capabilities": {
               "baselineCapabilitySet": "None",
               "additionalEnabledCapabilities": [
                 "NodeTuning",
                 "OperatorLifecycleManager",
                 "Ingress"
               ]
             }
           }
         # It is strongly recommended to include crun manifests as part of the additional install-time manifests for 4.13+.
         # The crun manifests can be obtained from source-crs/optional-extra-manifest/ and added to the git repo ie.sno-extra-manifest.
         # extraManifestPath: sno-extra-manifest
         clusterLabels:
           # These example cluster labels correspond to the bindingRules in the PolicyGenTemplate examples
           du-profile: "latest"
           # These example cluster labels correspond to the bindingRules in the PolicyGenTemplate examples in ../policygentemplates:
           # ../policygentemplates/common-ranGen.yaml will apply to all clusters with 'common: true'
           common: true
           # ../policygentemplates/group-du-sno-ranGen.yaml will apply to all clusters with 'group-du-sno: ""'
           group-du-sno: ""
           # ../policygentemplates/example-sno-site.yaml will apply to all clusters with 'sites: "example-sno"'
           # Normally this should match or contain the cluster name so it only applies to a single cluster
           sites: "example-sno"
         clusterNetwork:
           - cidr: 1001:1::/48
             hostPrefix: 64
         machineNetwork:
           - cidr: 1111:2222:3333:4444::/64
         serviceNetwork:
           - 1001:2::/112
         additionalNTPSources:
           - 1111:2222:3333:4444::2
         # Initiates the cluster for workload partitioning. Setting specific reserved/isolated CPUSets is done via PolicyTemplate
         # please see Workload Partitioning Feature for a complete guide.
         cpuPartitioningMode: AllNodes
         # Optionally; This can be used to override the KlusterletAddonConfig that is created for this cluster:
         #crTemplates:
         #  KlusterletAddonConfig: "KlusterletAddonConfigOverride.yaml"
         nodes:
           - hostName: "example-node1.example.com"
             role: "master"
             # Optionally; This can be used to configure desired BIOS setting on a host:
             #biosConfigRef:
             #  filePath: "example-hw.profile"
             bmcAddress: "idrac-virtualmedia+https://[1111:2222:3333:4444::bbbb:1]/redfish/v1/Systems/System.Embedded.1"
             bmcCredentialsName:
               name: "example-node1-bmh-secret"
             bootMACAddress: "AA:BB:CC:DD:EE:11"
             # Use UEFISecureBoot to enable secure boot
             bootMode: "UEFI"
             rootDeviceHints:
               deviceName: "/dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0"
             # disk partition at `/var/lib/containers` with ignitionConfigOverride. Some values must be updated. See DiskPartitionContainer.md for more details
             ignitionConfigOverride: |
               {
                 "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"
                     }
                   ]
                 }
               }
             nodeNetwork:
               interfaces:
                 - name: eno1
                   macAddress: "AA:BB:CC:DD:EE:11"
               config:
                 interfaces:
                   - name: eno1
                     type: ethernet
                     state: up
                     ipv4:
                       enabled: false
                     ipv6:
                       enabled: true
                       address:
                         # For SNO sites with static IP addresses, the node-specific,
                         # API and Ingress IPs should all be the same and configured on
                         # the interface
                         - ip: 1111:2222:3333:4444::aaaa: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

   注意

   从 ztp-site-generate 容器的 out/extra-manifest 目录中提取引用 CR 配置文件后，您可以使用 extraManifests.searchPaths 来包含包含这些文件的 git 目录的路径。这允许 GitOps ZTP 管道在集群安装过程中应用这些 CR 文件。如果您配置 searchPaths 目录，GitOps ZTP 管道不会在站点安装过程中从 ztp-site-generate 容器获取清单。

5. 运行以下命令，通过处理修改后的 SiteConfig CR site-1-sno.yaml 来生成第 0 天安装 CR：

   $ podman run -it --rm -v `pwd`/out/argocd/example/siteconfig:/resources:Z -v `pwd`/site-install:/output:Z,U registry.redhat.io/openshift4/ztp-site-generate-rhel8:v4.16 generator install site-1-sno.yaml /output

   输出示例

   site-install
   └── site-1-sno
       ├── site-1_agentclusterinstall_example-sno.yaml
       ├── site-1-sno_baremetalhost_example-node1.example.com.yaml
       ├── site-1-sno_clusterdeployment_example-sno.yaml
       ├── site-1-sno_configmap_example-sno.yaml
       ├── site-1-sno_infraenv_example-sno.yaml
       ├── site-1-sno_klusterletaddonconfig_example-sno.yaml
       ├── site-1-sno_machineconfig_02-master-workload-partitioning.yaml
       ├── site-1-sno_machineconfig_predefined-extra-manifests-master.yaml
       ├── site-1-sno_machineconfig_predefined-extra-manifests-worker.yaml
       ├── site-1-sno_managedcluster_example-sno.yaml
       ├── site-1-sno_namespace_example-sno.yaml
       └── site-1-sno_nmstateconfig_example-node1.example.com.yaml

6. 可选：使用 -E 选项处理参考 SiteConfig CR，只为特定集群类型生成 day-0 MachineConfig 安装 CR。例如，运行以下命令：

   1. 为 MachineConfig CR 创建输出文件夹：

      $ mkdir -p ./site-machineconfig

   2. 生成 MachineConfig 安装 CR：

      $ podman run -it --rm -v `pwd`/out/argocd/example/siteconfig:/resources:Z -v `pwd`/site-machineconfig:/output:Z,U registry.redhat.io/openshift4/ztp-site-generate-rhel8:v4.16 generator install -E site-1-sno.yaml /output

      输出示例

      site-machineconfig
      └── site-1-sno
          ├── site-1-sno_machineconfig_02-master-workload-partitioning.yaml
          ├── site-1-sno_machineconfig_predefined-extra-manifests-master.yaml
          └── site-1-sno_machineconfig_predefined-extra-manifests-worker.yaml

7. 使用上一步中的参考 PolicyGenerator CR 生成并导出 day-2 配置 CR。运行以下命令：

   1. 为 day-2 CR 创建输出文件夹：

      $ mkdir -p ./ref

   2. 生成并导出第 2 天配置 CR：

      $ podman run -it --rm -v `pwd`/out/argocd/example/acmpolicygenerator:/resources:Z -v `pwd`/ref:/output:Z,U registry.redhat.io/openshift4/ztp-site-generate-rhel8:v4.16 generator config -N . /output

      该命令在 ./ref 文件夹中为单节点 OpenShift、三节点集群和标准集群生成示例组和特定于站点的 PolicyGenerator CR。

      输出示例

      ref
       └── customResource
            ├── common
            ├── example-multinode-site
            ├── example-sno
            ├── group-du-3node
            ├── group-du-3node-validator
            │    └── Multiple-validatorCRs
            ├── group-du-sno
            ├── group-du-sno-validator
            ├── group-du-standard
            └── group-du-standard-validator
                 └── Multiple-validatorCRs

8. 使用生成的 CR 作为安装集群的 CR 的基础。您可以将安装 CR 应用到 hub 集群，如 "Installing a single managed cluster" 所述。配置 CR 可以在集群安装后应用到集群。