6.2. 删除 cert-manager Operator

流程

1. 从 openshift-cert-manager-operator 命名空间中删除订阅：

   $ oc delete --namespace=openshift-cert-manager-operator subscription openshift-cert-manager-operator
   
   subscription.operators.coreos.com "openshift-cert-manager-operator" deleted

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2. 检索已安装的 ClusterServiceVersion 的版本号：

   $ oc get --namespace=openshift-cert-manager-operator subscription openshift-cert-manager-operator -oyaml | grep currentCSV

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   输出示例：

     currentCSV: openshift-cert-manager.v1.7.1

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3. 从 openshift-cert-manager-operator 命名空间中删除 ClusterServiceVersion：

   $ oc delete --namespace=openshift-cert-manager-operator csv openshift-cert-manager.v1.7.1

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   输出示例：

   clusterserviceversion.operators.coreos.com "openshift-cert-manager.v1.7.1" deleted

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4. 获取 Operator 提供的 CustomResourceDefinitions 的当前列表，以便在删除 ClusterServiceVersion 后删除它们：

   $ oc get csv -n openshift-cert-manager-operator openshift-cert-manager.v1.7.1 -oyaml | grep "kind: CustomResourceDefinition" -A2 | grep name | awk '{print $2}'

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   输出示例：

   certificaterequests.cert-manager.io
   certificates.cert-manager.io
   certmanagers.config.openshift.io
   certmanagers.operator.openshift.io
   challenges.acme.cert-manager.io
   clusterissuers.cert-manager.io
   issuers.cert-manager.io
   orders.acme.cert-manager.io

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5. 删除与 cert-manager Operator 相关的 CustomResourceDefinitions：

   $ oc delete crd certificaterequests.cert-manager.io certificates.cert-manager.io certmanagers.config.openshift.io certmanagers.operator.openshift.io challenges.acme.cert-manager.io clusterissuers.cert-manager.io issuers.cert-manager.io orders.acme.cert-manager.io

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   输出示例：

   customresourcedefinition.apiextensions.k8s.io "certificaterequests.cert-manager.io" deleted
   customresourcedefinition.apiextensions.k8s.io "certificates.cert-manager.io" deleted
   customresourcedefinition.apiextensions.k8s.io "certmanagers.config.openshift.io" deleted
   customresourcedefinition.apiextensions.k8s.io "certmanagers.operator.openshift.io" deleted
   customresourcedefinition.apiextensions.k8s.io "challenges.acme.cert-manager.io" deleted
   customresourcedefinition.apiextensions.k8s.io "clusterissuers.cert-manager.io" deleted
   customresourcedefinition.apiextensions.k8s.io "issuers.cert-manager.io" deleted
   customresourcedefinition.apiextensions.k8s.io "orders.acme.cert-manager.io" deleted

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6. 删除 cert-manager Operator 拥有的命名空间：

   $ oc delete project openshift-cert-manager openshift-cert-manager-operator

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   输出示例：

   project.project.openshift.io "openshift-cert-manager" deleted
   project.project.openshift.io "openshift-cert-manager-operator" deleted

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