How to connect to Node Container app via SSH?

Question

Using docker to run a node application i am unable to access it via SSH in the azure portal. I have added an ssh config file and am using apk add openssh. The app runs fine without adding the commands to add SSH. No clue how to get it to work correctly. Getting azure connection refused

FROM node:14-alpine as builder
WORKDIR /app/

COPY package.json yarn.lock /app/

RUN yarn

ADD . .

RUN yarn build

FROM node:14-alpine as runner
WORKDIR /app/
ENV NODE_ENV=production

COPY --from=builder /app/build /app/
COPY --from=builder /app/package.json /app/yarn.lock /app/
COPY src/database/prisma/schema.prisma /app/prisma/

RUN yarn

COPY docker/sshd_config /etc/ssh/
RUN mkdir /var/run/sshd
RUN apk add openssh && echo "root:MyP@ssword1" | chpasswd

#EXPOSE 8080
#CMD node web_server/index.js
EXPOSE 8080 2222
CMD /usr/sbin/sshd &; node web_server/index.js

Answer 1

If your app runs fine, try to add the followings:

Add a sshd_config file to your repository, like the following example.

Port            2222
ListenAddress       0.0.0.0
LoginGraceTime      180
X11Forwarding       yes
Ciphers aes128-cbc,3des-cbc,aes256-cbc,aes128-ctr,aes192-ctr,aes256-ctr
MACs hmac-sha1,hmac-sha1-96
StrictModes         yes
SyslogFacility      DAEMON
PasswordAuthentication  yes
PermitEmptyPasswords    no
PermitRootLogin     yes
Subsystem sftp internal-sftp

In your Dockerfile, try to add the following commands:

# ssh
COPY docker/sshd_config /etc/ssh/
RUN mkdir /var/run/sshd
RUN apk add openssh && echo "root:MyP@ssword1" | chpasswd

COPY sshd_config /etc/ssh/
COPY init.sh /usr/local/bin/

EXPOSE 8080 2222
CMD ["bash","init.sh"]

Add init.sh in the root folder of your project.

#!/bin/bash
set -e
echo "Starting SSH ..."
service ssh start
node web_server/index.js

Or, change your last code to CMD ["/usr/sbin/sshd","-D", "node web_server/index.js"]

For more references, seehere1 and here2