docker - w3toppers.com

How to create a Mongo Docker Image with default collections and data?

The problem was that information could not be saved on /db/data, so I’ve created a solution creating my own data directory. # Parent Dockerfile https://github.com/docker-library/mongo/blob/982328582c74dd2f0a9c8c77b84006f291f974c3/3.0/Dockerfile FROM mongo:latest # Modify child mongo to use /data/db2 as dbpath (because /data/db wont persist the build) RUN mkdir -p /data/db2 \ && echo “dbpath = /data/db2” > /etc/mongodb.conf \ … Read more

Start sshd automatically with docker container

Just try: ENTRYPOINT service ssh restart && bash in your dockerfile, it works fun for me! more details here: How to automatically start a service when running a docker container?

Cannot find module ‘sass’

To note! node-sass is deprecated as by now! Warning: LibSass and Node Sass are deprecated. While they will continue to receive maintenance releases indefinitely, there are no plans to add additional features or compatibility with any new CSS or Sass features. Projects that still use it should move onto Dart Sass. Instead you can see … Read more

How to set uid and gid in Docker Compose?

Try this So, you need to put: user: “${UID}:${GID}” in your docker compose and provide UID and GID as docker-compose parameter UID=${UID} GID=${GID} docker-compose up (or define UID and GID as environment variables).

How to access the VM created by docker’s HyperKit?

Update 2019-01-31, thanks to ru10’s update, now there is a better way: screen ~/Library/Containers/com.docker.docker/Data/vms/0/tty Original Answer: After a while, I found following way to get a shell of the VM that was created by HyperKit: Run from terminal: screen ~/Library/Containers/com.docker.docker/Data/com.docker.driver.amd64-linux/tty You will see an empty screen, then type enter, you will get a login prompt. … Read more

Assigning vhosts to Docker ports

This answer might be a bit late, but what you need is an automatic reverse proxy. I have used two solutions for that: jwilder/nginx-proxy Traefik With time, my preference is to use Traefik. Mostly because it is well documented and maintained, and comes with more features (load balancing with different strategies and priorities, healthchecks, circuit … Read more

How to stop all containers when one container stops with docker-compose?

You can use: docker-compose up –abort-on-container-exit Which will stop all containers if one of your containers stops

What is the authoritative list of Docker Run exit codes?

For Docker >= 1.10 see this PR, which follows standard chroot exit codes: 125: docker run itself fails 126: contained command cannot be invoked 127: if contained command cannot be found 128 + n Fatal error signal n: 130 = (128+2) Container terminated by Control-C 137 = (128+9) Container received a SIGKILL 143 = (128+15) … Read more

How many CPUs does a docker container use?

As Charles mentions, by default all can be used, or you can limit it per container using the –cpuset-cpus parameter. docker run –cpuset-cpus=”0-2″ myapp:latest That would restrict the container to 3 CPU’s (0, 1, and 2). See the docker run docs for more details. The preferred way to limit CPU usage of containers is with … Read more

Get Environment Variable from Docker Container

To view all env variables: docker exec container env To get one: docker exec container env | grep VARIABLE | cut -d’=’ -f2