Docker exec into container
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In actual usage, your DevOps configuration management or orchestration engine would handle setting up the correct environment variables for each stage of the pipeline. If we use attach we can use only one instance of the shell. The point is to show how your containerized applications can interact with your host's development environment. The big advantage of doing it this way is you're getting a fully functional terminal.
Orphaned system processes are only a problem when running applications that double-fork and detach from their parent process aka daemonize. You can handle this by using a well known name that is resolved by a external resource instead. Explains running commands inside already running container or while launching container.
Note here that Start-Process and the -Wait parameter are used to run the installer. However, when necessary, you can set environment variables for each container rather than making stateful changes to the fixed image. If your container is running a webserver, for example, docker attach will probably connect you to the stdout of the web server process. Then, you can run another container, and with the --volumes-from option, share that volume with the first one. For more pointers and documentation see: That's pretty sweet.
How to get bash or ssh into a running container in background mode? - If you are performing a durable change to the configuration, it should be done in the image — because if you start a new container, the old configuration will be there again, and your changes will be lost. The first solution is pretty easy; but it requires root access to the Docker host which is not great from a security point of view.
Exiting a Docker Container August 29, 2017 Want to exit a docker container. You have several options to choose from. This is not what you want in this case. But those cause the command to stop, which in turns stops the container. What if you want it to keep running, but not in the docker exec into container. The Solution You can exit an interactive Docker session, without doing the above. What you want to do in that case, is daemonize the container. By typing ctrl+p and ctrl+q after each other, you turnwhich keeps the container running but frees up your terminal. You can attach to it later using docker attach, if you need to interact with the container more. Of course you should not rely on this workflow for anything more than experimenting around. Run it directly in the background, by starting it in detached mode with -d.
