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14.5. GitOps ZTP의 이미지 사전 캐싱

SiteConfig 매니페스트는 OpenShift 클러스터를 설치 및 구성하는 방법을 정의합니다. ZTP( GitOps Zero Touch Provisioning) 프로비저닝 워크플로우에서 factory-precaching-cli 툴에는 site Config 매니페스트에 다음과 같은 추가 필드가 필요합니다.

  • clusters.ignitionConfigOverride
  • nodes.installerArgs
  • nodes.ignitionConfigOverride

추가 필드가 있는 siteConfig의 예

apiVersion: ran.openshift.io/v1
kind: SiteConfig
metadata:
  name: "example-5g-lab"
  namespace: "example-5g-lab"
spec:
  baseDomain: "example.domain.redhat.com"
  pullSecretRef:
    name: "assisted-deployment-pull-secret"
  clusterImageSetNameRef: "img4.9.10-x86-64-appsub"
1 

  sshPublicKey: "ssh-rsa ..."
  clusters:
  - clusterName: "sno-worker-0"
    clusterImageSetNameRef: "eko4-img4.11.5-x86-64-appsub"
2 

    clusterLabels:
      group-du-sno: ""
      common-411: true
      sites : "example-5g-lab"
      vendor: "OpenShift"
    clusterNetwork:
      - cidr: 10.128.0.0/14
        hostPrefix: 23
    machineNetwork:
      - cidr: 10.19.32.192/26
    serviceNetwork:
      - 172.30.0.0/16
    networkType: "OVNKubernetes"
    additionalNTPSources:
      - clock.corp.redhat.com
    ignitionConfigOverride:
      '{
        "ignition": {
          "version": "3.1.0"
        },
        "systemd": {
          "units": [
            {
              "name": "var-mnt.mount",
              "enabled": true,
              "contents": "[Unit]\nDescription=Mount partition with artifacts\nBefore=precache-images.service\nBindsTo=precache-images.service\nStopWhenUnneeded=true\n\n[Mount]\nWhat=/dev/disk/by-partlabel/data\nWhere=/var/mnt\nType=xfs\nTimeoutSec=30\n\n[Install]\nRequiredBy=precache-images.service"
            },
            {
              "name": "precache-images.service",
              "enabled": true,
              "contents": "[Unit]\nDescription=Extracts the precached images in discovery stage\nAfter=var-mnt.mount\nBefore=agent.service\n\n[Service]\nType=oneshot\nUser=root\nWorkingDirectory=/var/mnt\nExecStart=bash /usr/local/bin/extract-ai.sh\n#TimeoutStopSec=30\n\n[Install]\nWantedBy=multi-user.target default.target\nWantedBy=agent.service"
            }
          ]
        },
        "storage": {
          "files": [
            {
              "overwrite": true,
              "path": "/usr/local/bin/extract-ai.sh",
              "mode": 755,
              "user": {
                "name": "root"
              },
              "contents": {
                "source": "data:,%23%21%2Fbin%2Fbash%0A%0AFOLDER%3D%22%24%7BFOLDER%3A-%24%28pwd%29%7D%22%0AOCP_RELEASE_LIST%3D%22%24%7BOCP_RELEASE_LIST%3A-ai-images.txt%7D%22%0ABINARY_FOLDER%3D%2Fvar%2Fmnt%0A%0Apushd%20%24FOLDER%0A%0Atotal_copies%3D%24%28sort%20-u%20%24BINARY_FOLDER%2F%24OCP_RELEASE_LIST%20%7C%20wc%20-l%29%20%20%23%20Required%20to%20keep%20track%20of%20the%20pull%20task%20vs%20total%0Acurrent_copy%3D1%0A%0Awhile%20read%20-r%20line%3B%0Ado%0A%20%20uri%3D%24%28echo%20%22%24line%22%20%7C%20awk%20%27%7Bprint%241%7D%27%29%0A%20%20%23tar%3D%24%28echo%20%22%24line%22%20%7C%20awk%20%27%7Bprint%242%7D%27%29%0A%20%20podman%20image%20exists%20%24uri%0A%20%20if%20%5B%5B%20%24%3F%20-eq%200%20%5D%5D%3B%20then%0A%20%20%20%20%20%20echo%20%22Skipping%20existing%20image%20%24tar%22%0A%20%20%20%20%20%20echo%20%22Copying%20%24%7Buri%7D%20%5B%24%7Bcurrent_copy%7D%2F%24%7Btotal_copies%7D%5D%22%0A%20%20%20%20%20%20current_copy%3D%24%28%28current_copy%20%2B%201%29%29%0A%20%20%20%20%20%20continue%0A%20%20fi%0A%20%20tar%3D%24%28echo%20%22%24uri%22%20%7C%20%20rev%20%7C%20cut%20-d%20%22%2F%22%20-f1%20%7C%20rev%20%7C%20tr%20%22%3A%22%20%22_%22%29%0A%20%20tar%20zxvf%20%24%7Btar%7D.tgz%0A%20%20if%20%5B%20%24%3F%20-eq%200%20%5D%3B%20then%20rm%20-f%20%24%7Btar%7D.gz%3B%20fi%0A%20%20echo%20%22Copying%20%24%7Buri%7D%20%5B%24%7Bcurrent_copy%7D%2F%24%7Btotal_copies%7D%5D%22%0A%20%20skopeo%20copy%20dir%3A%2F%2F%24%28pwd%29%2F%24%7Btar%7D%20containers-storage%3A%24%7Buri%7D%0A%20%20if%20%5B%20%24%3F%20-eq%200%20%5D%3B%20then%20rm%20-rf%20%24%7Btar%7D%3B%20current_copy%3D%24%28%28current_copy%20%2B%201%29%29%3B%20fi%0Adone%20%3C%20%24%7BBINARY_FOLDER%7D%2F%24%7BOCP_RELEASE_LIST%7D%0A%0A%23%20workaround%20while%20https%3A%2F%2Fgithub.com%2Fopenshift%2Fassisted-service%2Fpull%2F3546%0A%23cp%20%2Fvar%2Fmnt%2Fmodified-rhcos-4.10.3-x86_64-metal.x86_64.raw.gz%20%2Fvar%2Ftmp%2F.%0A%0Aexit%200"
              }
            },
            {
              "overwrite": true,
              "path": "/usr/local/bin/agent-fix-bz1964591",
              "mode": 755,
              "user": {
                "name": "root"
              },
              "contents": {
                "source": "data:,%23%21%2Fusr%2Fbin%2Fsh%0A%0A%23%20This%20script%20is%20a%20workaround%20for%20bugzilla%201964591%20where%20symlinks%20inside%20%2Fvar%2Flib%2Fcontainers%2F%20get%0A%23%20corrupted%20under%20some%20circumstances.%0A%23%0A%23%20In%20order%20to%20let%20agent.service%20start%20correctly%20we%20are%20checking%20here%20whether%20the%20requested%0A%23%20container%20image%20exists%20and%20in%20case%20%22podman%20images%22%20returns%20an%20error%20we%20try%20removing%20the%20faulty%0A%23%20image.%0A%23%0A%23%20In%20such%20a%20scenario%20agent.service%20will%20detect%20the%20image%20is%20not%20present%20and%20pull%20it%20again.%20In%20case%0A%23%20the%20image%20is%20present%20and%20can%20be%20detected%20correctly%2C%20no%20any%20action%20is%20required.%0A%0AIMAGE%3D%24%28echo%20%241%20%7C%20sed%20%27s%2F%3A.%2A%2F%2F%27%29%0Apodman%20image%20exists%20%24IMAGE%20%7C%7C%20echo%20%22already%20loaded%22%20%7C%7C%20echo%20%22need%20to%20be%20pulled%22%0A%23podman%20images%20%7C%20grep%20%24IMAGE%20%7C%7C%20podman%20rmi%20--force%20%241%20%7C%7C%20true"
              }
            }
          ]
        }
      }'
    nodes:
      - hostName: "snonode.sno-worker-0.example.domain.redhat.com"
        role: "master"
        bmcAddress: "idrac-virtualmedia+https://10.19.28.53/redfish/v1/Systems/System.Embedded.1"
        bmcCredentialsName:
          name: "worker0-bmh-secret"
        bootMACAddress: "e4:43:4b:bd:90:46"
        bootMode: "UEFI"
        rootDeviceHints:
          deviceName: /dev/disk/by-path/pci-0000:01:00.0-scsi-0:2:0:0
        installerArgs: '["--save-partlabel", "data"]'
        ignitionConfigOverride: |
           {
            "ignition": {
              "version": "3.1.0"
            },
            "systemd": {
              "units": [
                {
                  "name": "var-mnt.mount",
                  "enabled": true,
                  "contents": "[Unit]\nDescription=Mount partition with artifacts\nBefore=precache-ocp-images.service\nBindsTo=precache-ocp-images.service\nStopWhenUnneeded=true\n\n[Mount]\nWhat=/dev/disk/by-partlabel/data\nWhere=/var/mnt\nType=xfs\nTimeoutSec=30\n\n[Install]\nRequiredBy=precache-ocp-images.service"
                },
                {
                  "name": "precache-ocp-images.service",
                  "enabled": true,
                  "contents": "[Unit]\nDescription=Extracts the precached OCP images into containers storage\nAfter=var-mnt.mount\nBefore=machine-config-daemon-pull.service nodeip-configuration.service\n\n[Service]\nType=oneshot\nUser=root\nWorkingDirectory=/var/mnt\nExecStart=bash /usr/local/bin/extract-ocp.sh\nTimeoutStopSec=60\n\n[Install]\nWantedBy=multi-user.target"
                }
              ]
            },
            "storage": {
              "files": [
                {
                  "overwrite": true,
                  "path": "/usr/local/bin/extract-ocp.sh",
                  "mode": 755,
                  "user": {
                    "name": "root"
                  },
                  "contents": {
                    "source": "data:,%23%21%2Fbin%2Fbash%0A%0AFOLDER%3D%22%24%7BFOLDER%3A-%24%28pwd%29%7D%22%0AOCP_RELEASE_LIST%3D%22%24%7BOCP_RELEASE_LIST%3A-ocp-images.txt%7D%22%0ABINARY_FOLDER%3D%2Fvar%2Fmnt%0A%0Apushd%20%24FOLDER%0A%0Atotal_copies%3D%24%28sort%20-u%20%24BINARY_FOLDER%2F%24OCP_RELEASE_LIST%20%7C%20wc%20-l%29%20%20%23%20Required%20to%20keep%20track%20of%20the%20pull%20task%20vs%20total%0Acurrent_copy%3D1%0A%0Awhile%20read%20-r%20line%3B%0Ado%0A%20%20uri%3D%24%28echo%20%22%24line%22%20%7C%20awk%20%27%7Bprint%241%7D%27%29%0A%20%20%23tar%3D%24%28echo%20%22%24line%22%20%7C%20awk%20%27%7Bprint%242%7D%27%29%0A%20%20podman%20image%20exists%20%24uri%0A%20%20if%20%5B%5B%20%24%3F%20-eq%200%20%5D%5D%3B%20then%0A%20%20%20%20%20%20echo%20%22Skipping%20existing%20image%20%24tar%22%0A%20%20%20%20%20%20echo%20%22Copying%20%24%7Buri%7D%20%5B%24%7Bcurrent_copy%7D%2F%24%7Btotal_copies%7D%5D%22%0A%20%20%20%20%20%20current_copy%3D%24%28%28current_copy%20%2B%201%29%29%0A%20%20%20%20%20%20continue%0A%20%20fi%0A%20%20tar%3D%24%28echo%20%22%24uri%22%20%7C%20%20rev%20%7C%20cut%20-d%20%22%2F%22%20-f1%20%7C%20rev%20%7C%20tr%20%22%3A%22%20%22_%22%29%0A%20%20tar%20zxvf%20%24%7Btar%7D.tgz%0A%20%20if%20%5B%20%24%3F%20-eq%200%20%5D%3B%20then%20rm%20-f%20%24%7Btar%7D.gz%3B%20fi%0A%20%20echo%20%22Copying%20%24%7Buri%7D%20%5B%24%7Bcurrent_copy%7D%2F%24%7Btotal_copies%7D%5D%22%0A%20%20skopeo%20copy%20dir%3A%2F%2F%24%28pwd%29%2F%24%7Btar%7D%20containers-storage%3A%24%7Buri%7D%0A%20%20if%20%5B%20%24%3F%20-eq%200%20%5D%3B%20then%20rm%20-rf%20%24%7Btar%7D%3B%20current_copy%3D%24%28%28current_copy%20%2B%201%29%29%3B%20fi%0Adone%20%3C%20%24%7BBINARY_FOLDER%7D%2F%24%7BOCP_RELEASE_LIST%7D%0A%0Aexit%200"
                  }
                }
              ]
            }
           }
        nodeNetwork:
          config:
            interfaces:
              - name: ens1f0
                type: ethernet
                state: up
                macAddress: "AA:BB:CC:11:22:33"
                ipv4:
                  enabled: true
                  dhcp: true
                ipv6:
                  enabled: false
          interfaces:
            - name: "ens1f0"
              macAddress: "AA:BB:CC:11:22:33"

1
spec.clusters.clusterImageSetNameRef 필드에 다른 이미지 세트를 지정하지 않는 한 배포에 사용되는 클러스터 이미지 세트를 지정합니다.
2
개별 클러스터를 배포하는 데 사용되는 클러스터 이미지 세트를 지정합니다. 정의된 경우 사이트 수준에서 spec.clusterImageSetNameRef 를 덮어씁니다.

14.5.1. cluster.ignitionConfigOverride 필드 이해
링크 복사

clusters.ignitionConfigOverride 필드는 GitOps ZTP 검색 단계에서 Ignition 형식으로 구성을 추가합니다. 구성에는 가상 미디어에 마운트된 ISO의 systemd 서비스가 포함됩니다. 이렇게 하면 스크립트는 검색 RHCOS 라이브 ISO의 일부이며 지원 설치 관리자(AI) 이미지를 로드하는 데 사용할 수 있습니다.

systemd 서비스
systemd 서비스는 var-mnt.mount 및 precache-images.services 입니다. precache-images.service 는 var-mnt.mount 단위의 /var/mnt 에 마운트할 디스크 파티션에 따라 다릅니다. 서비스는 extract-ai.sh 라는 스크립트를 호출합니다.
extract-ai.sh
extract-ai.sh 스크립트는 디스크 파티션의 필수 이미지를 추출하고 로컬 컨테이너 스토리지로 로드합니다. 스크립트가 성공적으로 완료되면 이미지를 로컬에서 사용할 수 있습니다.
agent-fix-bz1964591
agent-fix-bz1964591 스크립트는 AI 문제에 대한 해결 방법입니다. AI가 이미지를 제거하지 못하도록 하여 agent.service 가 레지스트리에서 이미지를 다시 가져올 수 있도록 agent-fix-bz1964591 스크립트에서 요청된 컨테이너 이미지가 존재하는지 확인합니다.
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