在构建时在 Kubernetes 容器中为反应应用程序杀死 -9

编程问答 2022-04-22

问题描述

我有一个 React 应用程序，我想使用 docker 文件将其部署到 kubernetes 并使用 Nginx 托管它。我的 Dockerfile 看起来像这样

FROM node:14-alpine as build

# Install git
RUN apk update && apk upgrade && \
    apk add --no-cache git

workdir /src
copY package*.json ./

RUN npm config set unsafe-perm true
RUN npm install
copY . .
RUN npm run build

运行kustomization后我的kuberetes配置如下

apiVersion: v1
data:
  settings.ts.ctmpl: |
    export const LIGHTHOUSE_API_HOST = 'stageBackendURL';
kind: ConfigMap
Metadata:
  name: lighthouse-web-configmap-6968hk6f5g
---
apiVersion: v1
kind: Service
Metadata:
  labels:
    app: lighthouse-web
    manifest_type: svc
  name: lighthouse-web
spec:
  ports:
  - port: 80
    protocol: TCP
    targetPort: 3001
  selector:
    app: lighthouse-web
  type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
Metadata:
  name: lighthouse-web
spec:
  minReadySeconds: 10
  progressDeadlineseconds: 600
  selector:
    matchLabels:
      app: lighthouse-web
  template:
    Metadata:
      labels:
        app: lighthouse-web
      name: lighthouse-web
    spec:
      containers:
      - args:
        - npm
        - run
        - serve
        image: <url to image>
        imagePullPolicy: Always
        name: lighthouse-web
        ports:
        - containerPort: 3001
          name: http
        volumeMounts:
        - mountPath: /src/src/settings.ts
          name: lighthouse-web-config
          subPath: settings.ts
        - mountPath: /src/build
          name: lighthouse-web-static
      - image: Nginx:1.14
        imagePullPolicy: Always
        name: Nginx
        ports:
        - containerPort: 80
          name: Nginx
        volumeMounts:
        - mountPath: /usr/share/Nginx/html
          name: lighthouse-web-static
      initContainers:
      - args:
        - -template
        - /config-templates/settings.ts.ctmpl:/config/settings.ts
        - -log-level
        - trace
        - -once
        image: <URL TO DOCKER IMAGE>
        imagePullPolicy: Always
        name: consul-template
        resources:
          limits:
            cpu: 500m
            memory: 500Mi
          requests:
            cpu: 500m
            memory: 500Mi
        volumeMounts:
        - mountPath: /config-templates
          name: lighthouse-web-configmap
        - mountPath: /config
          name: lighthouse-web-config
      volumes:
      - configMap:
          name: lighthouse-web-configmap-6968hk6f5g
        name: lighthouse-web-configmap
      - emptyDir: {}
        name: lighthouse-web-config
      - emptyDir: {}
        name: lighthouse-web-static

当我部署它时，构建目录是空的。我尝试通过 ssh 连接到容器并手动构建它，但出现此错误：

export NODE_OPTIONS=--max_old_space_size=4096 && react-scripts build

Creating an optimized production build...
The build Failed because the process exited too early. This probably means the system ran out of memory or someone called `kill -9` on the process.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] build: `export NODE_OPTIONS=--max_old_space_size=4096 && react-scripts build`
npm ERR! Exit status 1
npm ERR!

我之前将内存和 cpu 保持在 1gi 和 100m，但尝试增加到 16Gi 和 8Gi 但仍然没有工作。

解决方法

以上几点注意事项：

1：我会使用多阶段 Dockerfile 构建，其中您的整个构建过程发生在节点容器中，但最终的、完整的、构建的应用程序然后被复制到一个基于 nginx 的容器中，如

FROM node as build
...
FROM nginx
COPY --from=build /path/to/app /usr/share/nginx/html

2：npm 构建是昂贵的过程，在您的 kube 环境中执行 npm 构建，并设置合理的运行时限制，很可能会遇到您在此处提到的问题。

3：确保在您的工作站/构建系统上正确创建了应用程序工件

dockerkubernetesnpmnpmreactjsreactjssigkill