kubernetes - 将Secret值/环境var传递给flexvol选项

Question

我正在尝试使用k8s secret 或从本地环境获取环境变量来设置flexvol选项值，这可能吗？

我可以看到成功安装了 secret ，但是flexvol无法成功安装。知道除了 secret 以外还有其他解决方案。

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

我一直在研究同一件事，如果没有外部工具，这实际上是不可能的。

问题在于，flexvolume仅从 secret 中获取凭据，而其余部分则被认为是配置，并且需要传递。在这里您要做的实际上是变量替换，而kubernetes不支持，并且不支持: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来用env变量，bash / ps脚本以及适当的kubernetes部署解决方案(例如helm)中的变量替换这些值。

KV flexvolume是开源的，因此也可以进行修改以处理此用例