求生成Global、DB2、Mongo三类CR的JSON Patch格式oc patch命令

1. Global CR 配置命令 #

用于添加/启用备份配置，不会覆盖spec.Global下的其他已有配置：

oc patch <Global-CR-Name> --type='json' -p='[
  {
    "op": "add",
    "path": "/spec/Global/backup",
    "value": {
      "enabled": true,
      "name": "backup-name",
      "storageClassName": "RWX",
      "size": "500Gi"
    }
  }
]'

说明：若spec.Global.backup已存在，add操作会替换该节点的全部内容；如需仅更新单个字段，可拆分操作，比如单独更新enabled字段用path: /spec/Global/backup/enabled

2. MongoDBCommunity CR 配置命令 #

用于追加volumeMount和volume配置，完全保留原有容器、卷的已有配置：

oc patch MongoDBCommunity staging-mongodb --type='json' -p='[
  {
    "op": "add",
    "path": "/spec/statefulSet/spec/template/spec/containers/name=mongod/volumeMounts/-",
    "value": {
      "name": "backup",
      "mountPath": "/opt/data/backup"
    }
  },
  {
    "op": "add",
    "path": "/spec/statefulSet/spec/template/spec/volumes/-",
    "value": {
      "name": "backup",
      "persistentVolumeClaim": {
        "claimName": "backup-pvc"
      }
    }
  }
]'

说明：name=mongod是JSON Patch的数组查询语法，精准定位目标容器；/-表示将新元素追加到数组末尾，不会修改原有数组项

3. db2ucluster CR 配置命令 #

用于在storage数组中追加备份存储配置，不影响原有存储项：

oc patch db2ucluster staging-db2 --type='json' -p='[
  {
    "op": "add",
    "path": "/spec/storage/-",
    "value": {
      "claimName": "backup-pvc",
      "name": "backup",
      "spec": {
        "resources": {}
      },
      "type": "existing"
    }
  }
]'

说明：/-将新的存储配置追加到spec.storage数组末尾，原有存储配置完全保留

内容的提问来源于stack exchange，提问作者Mohan1234