在 Kubernetes 部署中將 configMap 作為參數傳遞

Question

I have a Dockerfile that starts a java process with this command CMD java -jar application.jar serve /path-to-file/setting.yaml

現在，我想將settings.yaml為 configMap，所以，我可以在 kubernetes 中管理它，而不是每次更新設置時都構建新的 docker 圖像。

My question is: is possible to achieve this now that I won't be passing setting.yaml in the Dockerfile but a kubernetes yaml as a confiMap?

 containers: - name: java-container image: javaimage:1.0 command: [""] args: ["pass the file here"]

是否可以將 kubernetes 部署中的文件作為args[""]上的 configMap 傳遞

Answer 1

首先，您將創建一個 ConfigMap：

cat <<EOF >file.yaml
[...]
EOF
kubectl create -n my-namespace configmap my-app-config --from-file=settings.yaml=file.yaml

然后，根據容器映像的CMD中加載的配置文件的路徑，將該 ConfigMap 掛載到正確的位置：

containers:
- name: app
  [ ... ]
  volumeMounts:
  - name: config-volume
    path: /path-to-file/settings.yaml
    subPath: settings.yaml
[ ... ]
volumes:
- name: config-volume
  configMap:
    name: my-app-config