Question

我发布了一个与此类似的question，并尝试实现该问题的答案：How to access Kubernetes container environment variables from Next.js application?

但是，当我仍然将环境变量称为process.env.USERNAME时，我仍然没有得到定义...我在部署文件中做错了吗？这是我的deployment.yaml的副本：

metadata:
  namespace: <namespace>
  releaseName: <release name>
  releaseVersion: 1.0.0
  target: <target>
auth:
replicaCount: 1
image:
  repository: '<name of repository is here>'
  pullPolicy: <always>
container:
  multiPorts:
  - containerPort: 443
  name: HTTPS
  protocol: TCP
  - containerPort: 80
  name: HTTP
  protocol: TCP
  env:
  - name: USERNAME
    valueFrom:
      secretKeyRef:
        name: my-username
        key: username
  - name: PASSWORD
    valueFrom:
      secretKeyRef:
        name: my-password
        key: password
  - name: HOST
    valueFrom:
      secretKeyRef:
        name: my-host
        key: host
  volumeMounts:
  - name: config
    mountPath: "/configMap"
    readOnly: true
volume:
  - name: config
    configMap:
      name: environmental-variables
resources:
  requests:
    cpu: 0.25
    memory: 256Mi
  limits:
    cpu: 1
    memory: 1024Mi
variables:
- name: NODE_ENV
  value: <node env value here>
ingress:
  enabled: true
  ingressType: <ingressType>
  applicationType: <application type>
  serviceEndpoint: <endpoint>
  multiPaths:
    - path: /
    - HTTPS
tls: 
  enabled: true
  secretName: <name>
autoscale:
  enabled: false
  minReplicas: 1
  maxReplicas: 5
  cpuAverageUtilization: 50
  memoryUtilizationValue: 50
annotations:
  ingress:
    nginx.ingress.kubernetes.io/affinity: <affinity>
    nginx.ingress.kubernetes.io/session-cookie-name: <cookie-name>
    nginx.ingress.kubernetes.io/session-cookie-expires: <number>
    nginx.ingress.kubernetes.io/session-cookie-max-age: <number>

我还创建了一个configMap.yaml文件，尽管我不确定这是否是正确的方法。这是我的configMap.yaml文件：

apiVersion: v1
kind: ConfigMap
metadata:
  name: environmental-variables
data:
  .env: |
    USERNAME: <username>
    PASSWORD: <password>
    HOST: <host>

任何帮助将不胜感激！另外，由于我不想公开任何变量，因为它包含敏感信息，因此我试图将环境变量设置为Secrets。我正在尝试使用Express在Node.js应用程序上执行此操作。谢谢！

编辑：这是我的Yaml文件中的“秘密”部分的样子

secrets:
  - name: environmental-variables
  key: USERNAME
  - name: environmental-variables
  key: PASSWORD

“我的秘密” yaml文件的外观如下：

kind: Secret
apiVersion: v1
metadata:
  name: environmental-variables
  namespace: tda-dev-duck-dev
data:
  USERNAME: <username>
  PASSWORD: <password>

Answer 1

您创建了ConfigMap，并试图从秘密中获取价值。如果您想从configmap中设置值，请按照以下说明更新环境

env:
  - name: USERNAME
    valueFrom:
      configMapKeyRef:
        name: environmental-variables # this is ConfigMap Name
        key: USERNAME # this is key in ConfigMap
  - name: PASSWORD
    valueFrom:
      configMapKeyRef:
        name: environmental-variables
        key: PASSWORD
  - name: HOST
    valueFrom:
      configMapKeyRef:
        name: environmental-variables
        key: HOST

并按照以下说明更新configmap

apiVersion: v1
kind: ConfigMap
metadata:
  name: environmental-variables
data:
  USERNAME: <username>
  PASSWORD: <password>
  HOST: <host>

要了解如何使用ConfigMap数据定义容器环境变量，请点击here

如果要将机密用作环境变量，请检查here

Answer 2

经过数天的思考，如何将Secrets用作环境变量，我想出了如何在我的nodejs应用程序中引用它！

在我以通常的方式调用环境变量process.env.VARIABLE_NAME之前，但是当我将Secrets作为环境变量使用时，这对我不起作用。为了获取变量的值，我必须在Javascript文件中执行process.env.ENVIRONMENTAL_VARIABLES_USERNAME，这对我来说很有效！其中ENVIRONMENTAL_VARIABLES是name，而USERNAME是密钥！

不确定这是否对其他人有帮助，但这是我设法在nodejs应用程序中访问我的Secrets的方法！

对于Kubernetes部署，环境变量返回未定义

2 个答案: