Error while installing docker on lxc container with zfs storage pool

1

hi,
I am trying to install docker in lxc container with security.privileged and security.nesting options as true. it is showing error of
service error message
docker.service - Docker Application Container Engine
Loaded: loaded (/lib/systemd/system/docker.service; enabled; vendor preset: enabled)
Active: failed (Result: start-limit-hit) since Mon 2019-01-28 10:10:38 UTC; 33s ago
Docs: https://docs.docker.com
Process: 681 ExecStart=/usr/bin/dockerd -H fd:// (code=exited, status=1/FAILURE)
Main PID: 681 (code=exited, status=1/FAILURE)

Jan 28 10:10:38 kmaster systemd[1]: docker.service: Failed with result ‘exit-code’.
Jan 28 10:10:38 kmaster systemd[1]: docker.service: Service hold-off time over, scheduling restart.
Jan 28 10:10:38 kmaster systemd[1]: Stopped Docker Application Container Engine.
Jan 28 10:10:38 kmaster systemd[1]: docker.service: Start request repeated too quickly.
Jan 28 10:10:38 kmaster systemd[1]: Failed to start Docker Application Container Engine.
Jan 28 10:10:38 kmaster systemd[1]: docker.service: Unit entered failed state.
Jan 28 10:10:38 kmaster systemd[1]: docker.service: Failed with result ‘start-limit-hit’.
Jan 28 10:11:03 kmaster systemd[1]: docker.service: Start request repeated too quickly.
Jan 28 10:11:03 kmaster systemd[1]: Failed to start Docker Application Container Engine.
Jan 28 10:11:03 kmaster systemd[1]: docker.service: Failed with result ‘start-limit-hit’.

Is there any way to install docker in lxc container with zfs storage

2

Hi!

Is this on LXC or LXD?

Docker on LXD requires only security.nesting and not security.privileged.
I think there are other error messages that are not shown above.

Here is how I run Docker on LXD. At the end, hello-world should be running for you.

# Προετοιμασία του container (τα τρέχουμε στο host)
lxc launch ubuntu:18.04 docker
lxc config set docker security.nesting true
lxc config set docker linux.kernel_modules overlay
lxc exec docker -- mkdir -p /lib/modules/`uname -r`/
lxc file push /lib/modules/`uname -r`/modules.dep.bin docker/lib/modules/`uname -r`/modules.dep.bin
lxc restart docker

# Εγκατάσταση του Docker και εκτέλεση του hello-world (τα τρέχουμε μέσα στο container)
curl -fsSL https://download.docker.com/linux/ubuntu/gpg | sudo apt-key add -
sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
sudo apt install docker-ce
sudo docker run hello-world
3

What storage driver is docker using in your case? For me it’s still vfs, doing exactly the same.

4

By default, the Docker Storage driver on Ubuntu is “aufs”.
Docker suggest that not to use “vfs” storage driver in Production, It recommends to use in development and production environments.