Docker

Question

我正在尝试在 Digital Ocean Kubernetes 集群上的 Rails 应用程序中启动 Webpack Dev Server。我想不出正确的命令。该应用程序在 Docker 本地运行。

我不断收到这样的错误：

Error: failed to start container "exactpos-webpack": Error response from daemon: OCI runtime create failed: container_linux.go:348: starting container process caused "exec: \"bin/bash\": stat bin/bash: no such file or directory": unknown Back-off restarting failed container

这是我的 docker-compose.yml 文件中的代码：

webpack_dev_server: build: .
command: ./bin/webpack-dev-server 
ports:
- 3035:3035 
volumes:
- .:/usr/src/app
- gem_cache:/gems 
env_file:
- .env/development/web
- .env/development/database environment:
- WEBPACKER_DEV_SERVER_HOST=0.0.0.0

这是我的 kubectl 部署 yaml 文件：

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: exactpos-webpack
spec:
  replicas: 1
  minReadySeconds: 150
  strategy:
    type: RollingUpdate
    rollingUpdate:
      maxSurge: 1
      maxUnavailable: 1  
  selector:
    matchLabels: 
      app: exactpos-webpack
      tier: webpack
  template:
    metadata:
      name: exactpos-webppack
      labels:
        app: exactpos-webpack
        tier: webpack
    spec:
      imagePullSecrets:
        - name: dockerhub-cred
      containers:             
        - name: exactpos-webpack
          image: index.docker.io/markhorrocks/exactpos_webpacker_dev_server:prod
          command: ["bin/bash","-c", "./bin/webpack_dev_server"]
          imagePullPolicy: Always
          ports:
            - containerPort: 3500       
          readinessProbe:
            tcpSocket:
              port: 3500
            initialDelaySeconds: 150
            timeoutSeconds: 5
            periodSeconds: 5
            failureThreshold: 10
          livenessProbe:
            tcpSocket:
              port: 3500
            initialDelaySeconds: 120
            timeoutSeconds: 5
            periodSeconds: 5
            failureThreshold: 10
          env:
          - name: RAILS_LOG_TO_STDOUT
            value: "true"
          - name: RAILS_SERVE_STATIC_FILES
            value: "true"
          - name: DATABASE_NAME
            value: "exactpos_production"
          - name: DATABASE_PORT
            value: "5432"
          - name: DATABASE_URL
            value: "postgres"
          - name: DATABASE_USER
            valueFrom:
              secretKeyRef:
                name: "db-user"
                key: "username"
          - name: DATABASE_PASSWORD
            valueFrom:
              secretKeyRef:
                name: "db-user-pass"
                key: "password"
          - name: REDIS_URL
            value: "redis"
          - name: REDIS_PORT
            value: "6379"
          - name: RAILS_ENV
            value: "production"
          - name: WEBPACKER_DEV_SERVER_HOST
            value: "0.0.0.0"
          - name: SECRET_KEY_BASE
            valueFrom:
              secretKeyRef:
                name: "secret-key-base"
                key: "secret-key-base"

Answer 1

您的 deployment.yaml 有以下内容：

command: ["bin/bash","-c", "./bin/webpack_dev_server"]

docker 图像中没有 bin/bash。它应该是这样的：

command: ["/bin/bash","-c", "./bin/webpack_dev_server"]

我相信，它会解决你的问题。

EDIT1：我再次查看了您的 docker-compose.yml 文件并看到以下行：

volumes:
- .:/usr/src/app

这意味着您在 docker 的运行时将所有文件从 . 目录复制到 /usr/src/app。 config/webpacker.yml 是否出现在该位置？或者您在运行时从 . 目录中的任何内容覆盖了 /usr/src/app。您能否也分享一下您的应用程序的 DockerFile 以便更好地理解？

Docker - 无法在 Kubernetes 集群上启动 Webpack Dev Server

Docker - Unable to start Webpack Dev Server on Kubernetes Cluster

digital-ocean

kubernetes

docker-compose