Docker Community Forums

Share and learn in the Docker community.

Cannot start container, /run is full


I have some problems recently with Docker filling all the space in my /run tmpfs. It wasn’t the case before. I increased the RAM memory on a first server but that’s not a permanent solution.

When I start a container, i have this message :

ERROR: for matomo-app  Cannot start service matomo-app: write /var/run/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/7641c3a23eb4a4bb822a9fafcd731c6c43b87503337a059591c17cb6e1e4d5bc/config.json: no space left on device: unknown

Okay, so I do a df -h and my /run is full :

tmpfs                                 496M  447M   0M  100% /run

And then I discovered that all the space is filled up by “pid” files located in /run/docker/containerd/daemon/io.containerd.runtime.v1.linux/moby/CONTAINER_ID where CONTAINER_ID is ID of my containers.

Interesting fact, each folder weighs 50M. In each folder, I have 12653 PID files, each one weighs 4,0K, so it’s approximately 50M.

Don’t know if it’s related but I’m using Docker on a VMWare ESXi (Ubuntu 16.04).

It’s weird that Docker has to create so many PID files, isn’t it ?

Thank you for your time

Is anybody has an idea how I can fix this problem ? Thank you

I have the same issue after upgrade docker to Server Version: 18.09.6