kubevirt通过json patch 关闭,启动虚拟机

JSON Patch由IETF在RFC 6902中规范.JavaScript Object Notation (JSON) Patch

JSON Path是描述JSON文档变化的格式. 使用它可以避免在只需要修改某一部分的时候发送整个文档内容. 当与HTTP PATCH方法混合使用的时候, 它允许在标准规范的基础上使用HTTP APIs进行部分更新.

   A JSON Patch document is a JSON [RFC4627] document that represents an
   array of objects.  Each object represents a single operation to be
   applied to the target JSON document.

   The following is an example JSON Patch document, transferred in an
   HTTP PATCH request:

   PATCH /my/data HTTP/1.1
   Host: example.org
   Content-Length: 326
   Content-Type: application/json-patch+json
   If-Match: "abc123"

   [
     { "op": "test", "path": "/a/b/c", "value": "foo" },
     { "op": "remove", "path": "/a/b/c" },
     { "op": "add", "path": "/a/b/c", "value": [ "foo", "bar" ] },
     { "op": "replace", "path": "/a/b/c", "value": 42 },
     { "op": "move", "from": "/a/b/c", "path": "/a/b/d" },
     { "op": "copy", "from": "/a/b/d", "path": "/a/b/e" }
   ]

kubevirt 通过vm类型控制虚拟机启动和关闭,下面是json patch 方式修改配置的方式,启动虚拟机.

[wjh@node1 mubot]$ kl get vm
NAME      AGE   STATUS    READY
mlcmlc0   13d   Stopped   False
mlcmlc1   13d   Running   True
mlcmlc2   13d   Stopped   False

[wjh@node1 mubot]$ kl get vmi
NAME      AGE     PHASE     IP            NODENAME   READY
mlcmlc1   13d     Running   172.17.0.18   node1      True


[wjh@node1 mubot]$ kl patch vm mlcmlc0 --type json -p '[{"op":"replace","path":"/spec/running","value":true}]'
virtualmachine.kubevirt.io/mlcmlc0 patched


[wjh@node1 mubot]$ kl get vm
NAME      AGE   STATUS     READY
mlcmlc0   13d   Starting   False
mlcmlc1   13d   Running    True
mlcmlc2   13d   Stopped    False

[wjh@node1 mubot]$ kl get vmi
NAME      AGE     PHASE     IP            NODENAME   READY
mlcmlc0   6m46s   Running   172.17.0.17   node1      True
mlcmlc1   13d     Running   172.17.0.18   node1      True