为 Kubernetes 部署返回未定义的环境变量

Question

我发了一个question similar to this and tried to implement what the answer for this question said: How to access Kubernetes container environment variables from Next.js application?

但是，当我仍然调用我的环境变量执行 process.env.USERNAME 时，我仍然返回未定义的...我的部署文件是否做错了什么？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，尽管我不确定这样做是否正确。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！此外，我正在尝试将我的环境变量设置为 Secrets，因为我不想公开我的任何变量，因为它包含敏感信息。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 Secrets 部分在我的 yaml 文件中的样子

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

我的 Secrets yaml 文件的样子：

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。如果你想从 configmap 中设置值，那么像下面这样更新 env

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

并像下面这样更新 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，请单击 here

如果您想将机密用作环境变量，请检查here

Answer 2

经过几天弄清楚如何将 Secrets 用作环境变量后，我弄清楚了如何在我的 nodejs 应用程序中引用它！

在我以正常方式调用环境变量之前，process.env.VARIABLE_NAME，但是当我将 Secrets 作为环境变量时，这对我不起作用。为了获得变量的值，我必须在 Javascript 文件中执行 process.env.ENVIRONMENTAL_VARIABLES_USERNAME，这对我有用！其中 ENVIRONMENTAL_VARIABLES 是 name 而 USERNAME 是关键！

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

为 Kubernetes 部署返回未定义的环境变量

Environmental variables returning undefined for Kubernetes deployment

deployment

environment-variables

node.js

kubernetes

kubernetes-secrets