15.5. GitOps ZTP でのイメージの事前キャッシュ
SiteConfig マニフェストは、OpenShift クラスターをインストールおよび設定する方法を定義します。GitOps Zero Touch Provisioning (ZTP) プロビジョニングワークフローの場合、factory-precaching-cli ツールでは SiteConfig マニフェストに次の追加フィールドが必要です。
-
clusters.ignitionConfigOverride -
nodes.installerArgs -
nodes.ignitionConfigOverride
SiteConfig v1 は、OpenShift Container Platform バージョン 4.18 以降では非推奨になります。ClusterInstance カスタムリソースを使用する SiteConfig Operator を通じて、同等の改良された機能が利用できるようになりました。詳細は、Procedure to transition from SiteConfig CRs to the ClusterInstance API を参照してください。
SiteConfig Operator の詳細は、SiteConfig を参照してください。
追加フィールドを含む SiteConfig の例
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"
sshPublicKey: "ssh-rsa ..."
clusters:
- clusterName: "sno-worker-0"
clusterImageSetNameRef: "eko4-img4.11.5-x86-64-appsub"
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"
15.5.1. clusters.ignitionConfigOverride フィールドについて リンクのコピーリンクがクリップボードにコピーされました!
clusters.ignitionConfigOverride フィールドは、GitOps ZTP 検出段階で Ignition 形式の設定を追加します。この設定には、仮想メディアにマウントされた ISO の systemd サービスが含まれます。これにより、スクリプトが検出 RHCOS ライブ ISO の一部となり、アシステッドインストーラー (AI) イメージのロードにスクリプトを使用できるようになります。
systemdサービス-
systemdサービスはvar-mnt.mountとprecache-images.servicesです。precache-images.serviceは、var-mnt.mountユニットによって/var/mntにマウントされるディスクパーティションに依存します。このサービスは、extract-ai.shというスクリプトを呼び出します。 extract-ai.sh-
extract-ai.shスクリプトは、必要なイメージをディスクパーティションからローカルコンテナーストレージに展開してロードします。スクリプトが正常に終了したら、イメージをローカルで使用できます。 agent-fix-bz1964591-
agent-fix-bz1964591スクリプトは、AI の問題の回避策です。AI がイメージを削除して、agent.serviceがレジストリーからイメージを再度プルするように強制するのを防ぐために、agent-fix-bz1964591スクリプトは、要求されたコンテナーイメージが存在するかどうかを確認します。