Kubernetes 配置与存储

kubectl create configmap app-config --from-literal=LOG_LEVEL=debug  # 字面量创建
kubectl create configmap nginx-conf --from-file=nginx.conf        # 从文件创建

apiVersion: v1
kind: ConfigMap
metadata:
  name: app-config
data:
  LOG_LEVEL: "debug"        # 普通键值
  app.yaml: |               # 多行文件内容
    port: 8080

apiVersion: v1
kind: Pod
metadata:
  name: web
spec:
  containers:
    - name: web
      image: nginx:1.25
      envFrom:
        - configMapRef:
            name: app-config   # 所有键一次性注入

spec:
  containers:
    - name: web
      image: nginx:1.25
      volumeMounts:
        - name: config
          mountPath: /etc/config   # 每个键变成一个文件
  volumes:
    - name: config
      configMap:
        name: app-config

echo -n 'admin' | base64    # 编码:YWRtaW4=

apiVersion: v1
kind: Secret
metadata:
  name: db-secret
type: Opaque          # 通用类型
data:
  username: YWRtaW4=  # base64 编码后的值
  password: cGFzc3dvcmQ=

apiVersion: v1
kind: PersistentVolumeClaim
metadata:
  name: data-pvc
spec:
  storageClassName: standard   # 触发动态供给
  accessModes:
    - ReadWriteOnce
  resources:
    requests:
      storage: 5Gi
---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: app
spec:
  selector:
    matchLabels:
      app: app
  template:
    metadata:
      labels:
        app: app
    spec:
      containers:
        - name: app
          image: nginx:1.25
          volumeMounts:
            - name: data
              mountPath: /data   # 数据写入此处即持久化
      volumes:
        - name: data
          persistentVolumeClaim:
            claimName: data-pvc

kubectl apply -f pvc-deploy.yaml
kubectl get pvc data-pvc   # STATUS 显示 Bound 即绑定成功