将 Secret values/environment var 传递给 flexvol 选项

Question

我正在尝试使用 k8s 秘密或从我的本地环境中获取环境变量来设置 flexvol 选项值，这可能吗？

我可以看到 secrets 已成功挂载，但 flexvol 无法成功挂载。如果有的话，除了 secrets 之外还有什么不同的解决方案，不胜感激。

deployment.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-deployment
  namespace: default
  labels:
    app: my-deployment
spec:
  replicas: 1
  selector:
    matchLabels:
      app: my-deployment
  template:
    metadata:
      labels:
        app: my-deployment
    spec:
      containers:
      - image: traefik:1.7.7-alpine
        name: traefik
        livenessProbe:
          tcpSocket:
            port: 80
          failureThreshold: 3
          initialDelaySeconds: 10
          periodSeconds: 10
          successThreshold: 1
          timeoutSeconds: 2
        volumeMounts:
        - name: certs 
          mountPath: /certs
        ports:
        - name: http
          containerPort: 80
          protocol: TCP
        env:
        - name: KV_NAME
          valueFrom:
            secretKeyRef:
              name: flexvol-var-secret
              key: keyvaultname
        - name: KV_OBJ_NAME
          valueFrom:
            secretKeyRef:
              name: flexvol-var-secret
              key: keyvaultobjectname
        - name: TENANT_ID
          valueFrom:
            secretKeyRef:
              name: flexvol-var-secret
              key: tenantid
        - name: RESOURCE_GROUP
          valueFrom:
            secretKeyRef:
              name: flexvol-var-secret
              key: resourcegroup
        - name: SUB_ID
          valueFrom:
            secretKeyRef:
              name: flexvol-var-secret
              key: subscriptionid
      volumes:
      - name: certs
        flexVolume:
          driver: "azure/kv"
          secretRef:
            name: kvcreds
          options:
            keyvaultname: ${KV_NAME}
            keyvaultobjectname: ${KV_OBJ_NAME}
            keyvaultobjecttype: "secret"
            tenantid: ${TENANT_ID}
            resourcegroup: ${RESOURCE_GROUP}
            subscriptionid: ${SUB_ID}

secret.yaml

kind: Secret
apiVersion: v1
metadata:
  name: flexvol-var-secret
  labels:
    name: flexvol-var-secret
  annotations:
    description: Template for flexVolume variables values
stringData:
  keyvaultname: "###"
  keyvaultobjectname: "###"
  tenantid: ""###"
  resourcegroup: "###"
  subscriptionid: "###"

Answer 1

我一直在研究同样的事情，如果没有外部工具，这真的不可能。

问题是flexvolume只是从secret中获取credentials，rest是配置，需要传入。你这里要做的本质上是变量替换，kubernetes没有，也不会支持: https://github.com/kubernetes/kubernetes/issues/52787#issuecomment-369645645

从好的方面来说，您可以使用任何工具将这些值替换为环境变量中的变量，从 bash/ps 脚本到适当的 kubernetes 部署解决方案，如 helm。

KV flexvolume 是开源的，因此也可以进行修改以处理此用例

将 Secret values/environment var 传递给 flexvol 选项

Pass Secret values/environment var to the flexvol options

kubernetes

azure-keyvault

azure-aks