Kubernetes 如何显示装载特定configmap/secret的所有部署/守护程序？

有时，我想探索装载特定configmap/secret的所有部署/守护程序

---

有什么方法可以通过

kubectl

实现这一点吗？

您需要

jq

来执行如此复杂的查询。 给你：

kubectl get -o json deploy,daemonset | jq '[.items[] | . as $parent | .spec.template.spec.volumes[]? | select(.configMap != null) | {kind:$parent.kind, name:$parent.metadata.name, configMap:.configMap.name}]'

jq

命令被解构：

[ // output as array
  .items[] // iterate over root key 'items'
  | 
  . as $parent // store the current entry as $parent to refer to it later
  | 
  .spec.template.spec.volumes[]? // iterate over its volumes (the ? to prevent error if there is no volume
  | 
  select(.configMap != null) // select only those volumes with configMap key 
  | 
  {kind:$parent.kind, name:$parent.metadata.name, configMap:.configMap.name} // now construct the output using $parent's kind and name and the configMap's name
]

示例输出：

[
  {
    "kind": "Deployment",
    "name": "telemetry-agent",
    "configMap": "telemetry-config-map"
  },
  {
    "kind": "DaemonSet",
    "name": "fluent-bit",
    "configMap": "fluent-bit"
  },
  {
    "kind": "DaemonSet",
    "name": "telegraf",
    "configMap": "telegraf"
  }
]

---

注意：如果要查找特定的configMap，只需替换

select（）

子句

.configMap！=null

到

.configMap.name==“特定的configMap”

。另外，如果您想从所有名称空间进行查询，可以将

--all namespaces

添加到

kubectl get

命令中，您需要使用

jq

来执行如此复杂的查询。 给你：

kubectl get -o json deploy,daemonset | jq '[.items[] | . as $parent | .spec.template.spec.volumes[]? | select(.configMap != null) | {kind:$parent.kind, name:$parent.metadata.name, configMap:.configMap.name}]'

jq

命令被解构：

[ // output as array
  .items[] // iterate over root key 'items'
  | 
  . as $parent // store the current entry as $parent to refer to it later
  | 
  .spec.template.spec.volumes[]? // iterate over its volumes (the ? to prevent error if there is no volume
  | 
  select(.configMap != null) // select only those volumes with configMap key 
  | 
  {kind:$parent.kind, name:$parent.metadata.name, configMap:.configMap.name} // now construct the output using $parent's kind and name and the configMap's name
]

示例输出：

[
  {
    "kind": "Deployment",
    "name": "telemetry-agent",
    "configMap": "telemetry-config-map"
  },
  {
    "kind": "DaemonSet",
    "name": "fluent-bit",
    "configMap": "fluent-bit"
  },
  {
    "kind": "DaemonSet",
    "name": "telegraf",
    "configMap": "telegraf"
  }
]

注意：如果要查找特定的configMap，只需替换

select（）

子句

.configMap！=null

到

.configMap.name==“特定的configMap”

。另外，如果您想从所有名称空间进行查询，可以将

--all namespace

添加到

kubectl get

命令中