Alpine pause container

This container is an alpine based container which does nothing except stays alive even without being run with -it. It can be used to replace the kubernetes pause container with one that has a shell, e.g. when testing some part of kubernetes in an interactive manner.

Usage

Run this container using docker run karlherler/pause, this will call the pause program (which does nothing but idle). If you want to override the pause application you can postfix the docker run command with any other command as the program is started using the CMD dockerfile parameter.

After the container is started you can investigate it by running docker exec -it containername sh

Usage from kubernetes

Simply replace image: kubernetes/pause with image: karlherler/pause in your pod spec and the new pod will support kubectl exec podname -i -t sh

Building

The simplest way to build this container is to call make using the make utility. This container relies on a small c program and thus building will require a c compiler of some sort, specifically one supporting gcc like flags. It is tested with gcc (version 6.1.1) and clang (version 3.8.0).

Using the docker container does not require any building.