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I have this Dockerfile ...
FROM keymetrics/pm2:latest-alpine
RUN apk update && \
apk upgrade && \
apk add \
bash
COPY . ./
EXPOSE 1886 80 443
CMD pm2-docker start --auto-exit --env ${NODE_ENV} ecosystem.config.js
How can I execute the CMD command using sudo ?
I need to do this because the port 443 is allowed only for sudo user.
201
By default that Unix socket is owned by the user root and other users can only access it using sudo . The Docker daemon always runs as the root user. If you don't want to preface the docker command with sudo , create a Unix group called docker and add users to it.
Check if an user has sudo access in Alpine Linux. As you can see, the user "ostechnix" can run all commands in my Alpine Linux box. Let us switch to the new sudo user and verify if he can able to run sudo tasks. Run any sudo operation to verify if the user really has sudo permissions.
Alpine Linux is a Linux distribution built around musl libc and BusyBox. The image is only 5 MB in size and has access to a package repository that is much more complete than other BusyBox based images. This makes Alpine Linux a great image base for utilities and even production applications.
The su-exec can be used in alpine. Do add it the package, if not already available, add the following to your Dockerfile
RUN apk add --no-cache su-exec
Inside your scripts you'd run inside docker you can use the following to become another user:
exec su-exec <my-user> <my command>
Alternatively, you could add the more familiair sudo package while building your docker-file Add the following to your Dockerfile that's FROM alpine
RUN set -ex && apk --no-cache add sudo
After that you can use sudo
sudo -u <my-user> <my command>
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