How can I expose more than 1 port with Docker?
To expose just one port, this is what you need to do: To expose multiple ports, simply provide multiple -p arguments:
docker
How to get the IP address of the docker host from inside a docker container
As @MichaelNeale noticed, there is no sense to use this method in Dockerfile (except when we need this IP during build time only), because this IP will be hardcoded during build time.
Why am I getting an RTNETLINK Operation Not Permitted when using Pipework with Docker containers?
Docker containers do not have full privileges by default. Try adding this to the docker run command: List of capabilities
Docker: How to clear the logs properly for a Docker container?
First the bad answer. From this question there’s a one-liner that you can run: instead of echo, there’s the simpler: or there’s the truncate command: I’m not a big fan of either of those since they modify Docker’s files directly. The external log deletion could happen while docker is writing json formatted data to the file, resulting … Read more
Docker – Name is already in use by container
Running the docker registry with below command always throws an error: How can I prevent this error ?
build context for docker image very large
The Docker client sends the entire “build context” to the Docker daemon. That build context (by default) is the entire directory the Dockerfile is in (so, the entire rpms tree). You can setup a .dockerignore file to get Docker to ignore some files. You might want to experiment with it. Alternatively, you can move your rpms folder one directory level above your Dockerfile, and … Read more
An error, “failed to solve with frontend dockerfile.v0”
I had the same issue and all I had to do was to capitalize the Docker configuration filename: dockerfile > didn’t work Dockerfile > did work
Correct way to detach from a container without stopping it
Update: As mentioned in below answers Ctrl+p, Ctrl+q will now turn interactive mode into daemon mode. Well Ctrl+C (or Ctrl+\) should detach you from the container but it will kill the container because your main process is a bash. A little lesson about docker. The container is not a real full functional OS. When you run a container the process you launch take the … Read more
docker: “build” requires 1 argument. See ‘docker build –help’
You need to add a dot, which means to use the Dockerfile in the local directory. For example: docker build -t mytag . It means you use the Dockerfile in the local directory, and if you use docker 1.5 you can specify a Dockerfile elsewhere. Extract from the help output from docker build: -f, –file=”” … Read more
Error response from daemon: getsockopt: connection refused
I had the same issue, seems like it related to certificates on your registry host. Check here on how to fix that: https://github.com/docker/docker/issues/23620