无法从docker容器连接到SSHECONNREFUSED127.0.0.1:22-NodeJS

Question

我正在nodejs上使用node-ssh模块。当我启动到ssh的连接时，它给出了错误。我也在使用WSL Ubuntu 18。我有docker compose文件。我在/etc/ssh/sshd\u config上将密码身份验证标记为“yes”。我可以从wsl ubuntu连接ssh。但是当我试图从我的Docked nodejs项目连接时。它给出了错误127.0.0.1:22

在nodejs上，我请求用户身份验证，运行一些命令，等等。

const Client = require('node-ssh').NodeSSH;
var client   = new Client();   

client.connect({
     host              : 'localhost',
     port              : 22,
     username          : req.body.username,
     password          : req.body.password,
     keepaliveInterval : 30 * 1000, // 30 minutes for idle as milliseconds
     keepaliveCountMax : 1,
}).then(()=>{

     // LOGIN SUCCESS

}).catch((e)=>{

     console.log(e); // ECONFUSED ERROR
     // LOGIN FAILED

});

docker撰写。yml公司

version: '3.8'

services:
  api:
    build:
      dockerfile: Dockerfile
      context: "./server"
    ports:
      - "3030:3030"
    depends_on:
      - mysql_db
    volumes:
      - /app/node_modules
      - ./server:/app

 ...

还有我的api的Dockerfile

Dockerfile文件

FROM node:alpine
WORKDIR /app
COPY package.json ./
COPY package-lock.json ./
COPY ./ ./
RUN npm i
RUN apk update \
&& apk add openssh-server 
COPY sshd_config /etc/ssh/
EXPOSE 22
CMD ["npm", "run", "start"]

[UPDATE__][Dockerfile]

FROM node:alpine
WORKDIR /app
COPY package.json ./
COPY package-lock.json ./
COPY ./ ./
RUN npm i \
&& apk add --update openssh \
&& rm  -rf /tmp/* /var/cache/apk/*
COPY sshd_config /etc/ssh/
# add entrypoint script
ADD ./docker-entrypoint.sh /usr/local/bin
# make sure we get fresh keys
RUN rm -rf /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_dsa_key
EXPOSE 22
ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["/usr/sbin/sshd","-D"]

[UPDATE\uu 2][Dockerfile]


FROM node:alpine
WORKDIR /app
COPY package.json ./
COPY package-lock.json ./
COPY ./ ./
RUN npm i
RUN apk update && \
apk add openssh-client \ 
&& rm -rf /tmp/* /var/cache/apk/*

EXPOSE 22
CMD ["npm", "run", "start"]

[解决方案]
我已经更改了Dockerfile和我的nodejs代码。按照Stefan Golubović的建议申请后，我已经从docker容器连接了WSL的SSHhost.docker.internal.并使用了node：最新而不是node：高山docker图像。感谢@Stefan Golubović和@Etienne Dijon

[固定]

const Client = require('node-ssh').NodeSSH;
var client   = new Client();   

client.connect({
     host              : 'host.docker.internal', // It's worked on WSL2
     port              : 22,
     username          : req.body.username,
     password          : req.body.password,
     keepaliveInterval : 30 * 1000, // 30 minutes for idle as milliseconds
     keepaliveCountMax : 1,
}).then(()=>{

     // LOGIN SUCCESS

}).catch((e)=>{

     console.log(e); // ECONFUSED ERROR
     // LOGIN FAILED

});

[已修复]


FROM node:latest
WORKDIR /app
COPY package.json ./
COPY package-lock.json ./
COPY ./ ./
RUN npm i
RUN apt-get update 
EXPOSE 22
CMD ["npm", "run", "start"]




Answer 1

>

您可以使用其他节点映像来运行您的应用程序，如node：最新https://hub.docker.com/_/node

基于debian，替代node的等效版本：alpine

尽量避免在docker容器中使用ssh，您可以使用脚本作为入口点在运行时配置您的容器

文档：https://docs.docker.com/engine/reference/builder/#entrypoint

html" target="_blank">脚本示例的最佳实践：https://docs.docker.com/develop/develop-images/dockerfile_best-practices/#entrypoint

要确保一切正常，您可以手动运行它

docker run-it-rm-name testalpine-v$PWD:/app/node:alpine/bin/sh

然后：

cd /app/
npm i
apk update && apk add openssh-server
# show listening services, openssh is not displayed
netstat -tlpn

如您所见，openssh不是自动启动的

Alpine有一个wiki，需要更新：

https://wiki.alpinelinux.org/wiki/Setting_up_a_ssh-server

阿尔卑斯山图像中没有rc更新。

这张图片是关于在alpine上运行ssh服务器的：

https://github.com/danielguerra69/alpine-sshd

正如您在Dockerfile中所看到的那样，涉及到更多步骤：

检查存储库以获取更新的dockerfile

FROM alpine:edge
MAINTAINER Daniel Guerra <[e-mail]>

# add openssh and clean
RUN apk add --update openssh \
&& rm  -rf /tmp/* /var/cache/apk/*
# add entrypoint script
ADD docker-entrypoint.sh /usr/local/bin
# make sure we get fresh keys
RUN rm -rf /etc/ssh/ssh_host_rsa_key /etc/ssh/ssh_host_dsa_key

EXPOSE 22
ENTRYPOINT ["docker-entrypoint.sh"]
CMD ["/usr/sbin/sshd","-D"]

容器启动后，您可以使用docker exec：

docker exec -it <container name/id> /bin/sh

这里留档：

https://docs.docker.com/engine/reference/commandline/exec/

• Updated dockerfile

  FROM node:alpine
  
  WORKDIR /app
  
  COPY ./ ./
  
  RUN npm i
  
  ENTRYPOINT ["npm", "run", "start"]