Grundkurs DockerEine praktische Einführung in die Welt.

If not overridden then by default centos or ubuntu docker containers run the /bin/bash command. Which starts a bash session and ends it soon after that. What if we want to start our container and keep a live connection to its interactive shell. For that we need to pass following flags in docker run command. $ docker run -it -v /tmp ubuntu /bin/bash Mit der Option -v werden neue Volumes erstellt und dem Container hinzugefügt: $ docker run -it -v /tmp -v /opt ubuntu /bin/bash Man kann auch mehrere Volumes miteinander verbinden, um sie alle demselben Container anzuhängen.

Um Docker-Volumes zu verstehen, ist es wichtig, zuerst zu verstehen, wie das Docker-Dateisystem funktioniert. Ein Docker-Image besteht aus mehreren schreibgeschützten Schichten. Wird ein Image aus einem Container gestartet, fügt Docker eine neue beschreibbare Schicht an der Spitze des Systems hinzu. Das wird in Docker Union File System genannt. Docker is an open source and popular operating system-level virtualization commonly known as “containerization” technology that primarily runs on Linux and Windows. Docker makes it easier to create, deploy, and run applications by using containers. With containers, developers and system. Personally, I love being able to choose between PowerShell, Bash or plain old cmd when I want to script something. And it’s always bugged me that I couldn’t get Docker working from Bash on Windows – until now. The original title of this post was “Running Docker from Bash on Windows”, but that would have been a slight overstatement. Once it runs, you can execute other commands in the same container with exec, such as: docker exec -ti CONTAINER_ID bash The above will start a bash session in the same container, which is great for taking a look around if you need to and perform one-off maintenance tasks.