乱读天书，不求甚解

周祎骏的个人云笔记

乱读天书，不求甚解

Kubernetes 02.23 ConfigMap

2023-05-17 02:22:05 36 0 0

admin

> APIresource: ConfigMap

# 创建ConfigMap
```
# 获得YAML 模板
kubectl create cm my-configmap --from-literal=k=v --dry-run=client -o yaml > configmap.yaml
vim configmap.yaml 
kubectl apply -f ./configmap.yaml

# 获取configmap 的信息和详细信息
kubectl get cm my-configmap
kubectl describe cm my-configmap
```
往configmap 里塞大量内容
```yaml
apiVersion: v1
data:
  keyy: vvv
  ttt: |
    lalala
    hahaha
kind: ConfigMap
metadata:
  creationTimestamp: null
  name: my-configmap
```
导入整个文件
```
kubectl create cm etc-hosts --from-file=/etc/hosts
```

# 在pod 中使用ConfigMap
## 只获取一个值
```yaml
spec:
  containers:
  - image: centos:latest
    name: my-pod-container
    env:
      - name: config_map_keyy
        valueFrom:
          configMapKeyRef:
            name: my-configmap
            key: my-key
```
## 获取所有值
```
spec:
  containers:
  - image: centos:latest
    name: my-pod-container
    env:
      - name: sleep_time
        value: "86400"
    envFrom:
      - configMapRef:
          name: my-configmap
```
## 通过volumeMount 获得所有值
```
spec:
  containers:
  - image: centos:latest
    name: my-pod-container
    volumeMounts:
      - name: config-volume
        mountPath: /config
  volumes:
    - name: config-volume
      configMap:
        name: my-configmap
```
## 通过volumeMount 获得值
```
spec:
  containers:
  - image: centos:latest
    name: my-pod-container
    volumeMounts:
      - name: config-volume
        mountPath: /config
  volumes:
    - name: config-volume
      configMap:
        name: my-configmap
        items:
          - key: xxx
            path: xxx.file 
```

上一篇: Kubernetes 02.10 pod节点调度_per_topology

下一篇: Kubernetes 02.24 Secret

文档导航