The Almighty Pause Container

When checking out the nodes of your Kubernetes cluster, you may have noticed some containers called “pause” running when you do a docker ps on the node.

$ docker psCONTAINER ID IMAGE COMMAND ......3b45e983c859 gcr.io/google_containers/pause-amd64:3.0 "/pause" ......dbfc35b00062 gcr.io/google_containers/pause-amd64:3.0 "/pause" ......c4e998ec4d5d gcr.io/google_containers/pause-amd64:3.0 "/pause" ......508102acf1e7 gcr.io/google_containers/pause-amd64:3.0 "/pause" ...

What are these “pause” containers and why are there so many of them? What’s going on?

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