How do I fix this error when installing a docker container? What does it mean? docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/mnt/user/appdata/postgresql_alpine" to rootfs at "/var/lib/postgresql/data": change mount propagation through procfd: open o_path procfd: open /var/lib/docker/btrfs/subvolumes/93598d4db74bc40f1c319adf4ada747e78f880d725d690e63d36c8c4cb73c9e5/var/lib/postgresql/data: no such file or directory: unknown.

Not sure if it's related but I recently converted my Docker Service, Docker data-root from "btrfs vDisk" to "Directory". I can install other Apps from the community store just fine.

Attached Diagnostics just incase that helps and below is all the info I have from the docker install. There are no other logs that I'm aware of.

docker run
  -d
  --name='PostgreSQL_Alpine'
  --net='dinopark'
  --pids-limit 2048
  -e TZ="America/Los_Angeles"
  -e HOST_OS="Unraid"
  -e HOST_HOSTNAME="FossilTower"
  -e HOST_CONTAINERNAME="PostgreSQL_Alpine"
  -e 'POSTGRES_DB'='postgres'
  -e 'POSTGRES_USER'='postgres'
  -e 'POSTGRES_PASSWORD'='postgres'
  -l net.unraid.docker.managed=dockerman
  -l net.unraid.docker.icon=''
  -p '5432:5432/tcp'
  -v '/mnt/user/appdata/postgresql_alpine':'/var/lib/postgresql/data':'rw'
  --user=99:100
  --memory=2G
  --restart=unless-stopped 'postgres:alpine'


WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
78493e6f64fb7919b98a4349bdc5ee164b1f762653aa8a0db2a50188bd39c0ad
docker: Error response from daemon: failed to create task for container: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: error during container init: error mounting "/mnt/user/appdata/postgresql_alpine" to rootfs at "/var/lib/postgresql/data": change mount propagation through procfd: open o_path procfd: open /var/lib/docker/btrfs/subvolumes/93598d4db74bc40f1c319adf4ada747e78f880d725d690e63d36c8c4cb73c9e5/var/lib/postgresql/data: no such file or directory: unknown.

The command failed.

fossiltower-diagnostics-20251028-1727.zip

Try recreating the Docker folder as an image, in my experience, Docker folders can sometimes cause strange errors.

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/#re-creating-the-docker-image-file

Then:

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/#reinstalling-docker-applications

Also see below if you have any custom docker networks:

https://docs.unraid.net/unraid-os/troubleshooting/common-issues/docker-troubleshooting/#restoring-docker-custom-networks