从节点映像运行docker容器时找不到Npm [英] Npm not found when running docker container from node image

问题描述

# Dockerfile
FROM node:7-alpine
RUN mkdir -p /src/app
WORKDIR /src/app
COPY package.json /src/app/package.json
RUN npm install
COPY . /src/app
EXPOSE 3000
CMD ['npm', 'start']

我正在尝试完成 katacoda.com 练习/ courses / docker / 3 rel = noreferrer>使用上述Dockerfile对nodejs 应用程序进行Docker化。构建完成，但运行映像立即退出，并且在docker日志中，我看到：

I'm trying to complete a katacoda.com exercise for Dockerizing nodejs applications with the Dockerfile above. The build completes but running the image quits immediately and in the docker logs I see:

/bin/sh: [npm,: not found

我尝试使用 docker -it nodeapp在交互模式下运行容器/ bin / bash 引发错误 docker：来自守护程序的错误响应：oci运行时错误：container_linux.go：262：启动容器进程导致 exec：\ / bin / bash\：stat / bin / bash：没有这样的文件或目录。因此，我不确定这里发生了什么。

I tried running the container in interactive mode with docker -it nodeapp /bin/bash which raised the error docker: Error response from daemon: oci runtime error: container_linux.go:262: starting container process caused "exec: \"/bin/bash\": stat /bin/bash: no such file or directory". So I'm not sure what is going on here.

推荐答案

它不起作用的原因是单引号

The reason it doesn't work is single quotes

CMD ['npm', 'start']

应该是

CMD ["npm", "start"]

当您不使用双引号时，docker将删除单引号并将命令作为 [npm，start]

When you don't use double quotes, docker will remove the single quotes and process the command as [npm, start]

这就是为什么您看到错误 [npm，：未找到

That is why you see error [npm, : not found

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