I have had no issues running docker inside of a Focal Fossa LXD container. Recently I tried to install docker inside a LXD container running Jammy Jellyfish. The docker service does not seem to start.
root@Search-Engine:~# docker ps
Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?
root@Search-Engine:~# systemctl status docker
Failed to dump process list for 'docker.service', ignoring: Input/output error
× docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Sun 2022-07-03 20:12:53 UTC; 20s ago
TriggeredBy: × docker.socket
Docs: https://docs.docker.com
Process: 420 ExecStart=/usr/bin/dockerd -H fd:// --containerd=/run/containerd/containerd.sock (code=exited, status=1/FAILURE)
Main PID: 420 (code=exited, status=1/FAILURE)
Tasks: 0
Memory: 160.0K
CGroup: /system.slice/docker.service
Jul 03 20:12:53 Search-Engine systemd[1]: docker.service: Scheduled restart job, restart counter is at 3.
Jul 03 20:12:53 Search-Engine systemd[1]: Stopped Docker Application Container Engine.
Jul 03 20:12:53 Search-Engine systemd[1]: docker.service: Start request repeated too quickly.
Jul 03 20:12:53 Search-Engine systemd[1]: docker.service: Failed with result 'exit-code'.
Jul 03 20:12:53 Search-Engine systemd[1]: Failed to start Docker Application Container Engine.```
Yes, I have. By the way, be sure to watch my YouTube channel devoted to LXD https://youtube.com/@scottibyte. The solution is to install your Docker in 22.04 with the script from the docker web site. Also, be sure to set security.nesting=true to nest inside of a LXD:
When I create a container under ubunt20.4.6, I will report these two types of errors. Have you ever encountered it?
My Docker is installed with 20.10.0. What version is yours,
docker: Error response from daemon: Could not check if docker-default AppArmor profile was loaded: open /sys/kernel/security/apparmor/profiles: permission denied.
docker: Error response from daemon: failed to create shim task: OCI runtime create failed: runc create failed: unable to start container process: can’t get final child’s PID from pipe: EOF: unknown.
@cc_jack What host is your LXD installed on? Perhaps set both security.nesting=true. I nest docker inside of LXD on both ubuntu 20.04 and 22.04 LXD containers. Usually OCI runtime errors in Docker are indicative of not having security.nesting=true which is what you need to nest docker inside of LXD.
I created ubunt 20.04.6 in the LXD that comes with QNAP NAS
I have previously run this command on QNAP NAS with security. testing=true, and also in ubunt 20.04.6, but it was of no use. I have tried changing the Docker version to adapt to ubunt 20.04.6,
My ultimate goal is to run Docker on Ubuntu 20.04.6, especially the homeassistant hasso supervisor
@cc_jack ohhhhhhhh well QNAP NAS is very different. Would you please come by my chat to discuss this subject https://chat.scottibyte.com/ . I have two QNAP NAS systems and their implementation of LXD results in a few minor issues that I need to ask you some questions and tell you some workarounds.
Thank you