riwaha Posted March 16, 2019 Posted March 16, 2019 On an Odroid C2 and Le Potato, both running Armbian 5.75, Docker fails to run hello-world when inside an LXD container, reproducible by running the following commands results in an error Spoiler apt-get update apt-get install snapd snap install lxd lxd init # set storage pool to dir , not xfs or btrfs lxc launch ubuntu:bionic docker lxc config set docker security.nesting true lxc config set docker linux.kernel_modules ip_tables, overlay lxc restart docker lxc exec ubuntu -- /bin/bash # inside the container apt-get update apt-get install docker.io systemctl enable docker systemctl start docker docker run --rm hello-world /var/log/syslog shows Spoiler docker dockerd[148]: time="2019-03-16T12:37:02.592553328Z" level=error msg="error unmounting /var/lib/docker/overlay2/1ed547e71f4803d40b3b3b3a65c96bf8553bb9532b733be2a5c50b803cc1aea-init/merged: invalid argument" storage-driver=overlay2 docker dockerd[148]: time="2019-03-16T12:37:02.592553328Z" level=error msg="Handler for POST /v1.39/containers/create returned error: error creating overlay mount to /var/lib/docker/overlay2/1ed547e71f4803d40b3b3b3a65c96bf8553bb9532b733be2a5c50b803cc1aea-init/merged: operation not permitted Running the same commands on Ubuntu 18.04 x86_64 runs the Docker container inside LXD without error. I have tried searching, I have found that it used to not be supported if the LXD storage pool was XFS, in this case LXD storage pool is dir which works on x86_64, but not Armbian, I am thinking it is kernel config, but have not found what would be missing.
Igor Posted March 16, 2019 Posted March 16, 2019 14 minutes ago, riwaha said: both running Armbian 5.75 Without armbianmonitor -u I have no idea which kernel you are using ... and kernel (config) is the most likely problem. Docker dependencies should be covered but snap and lxd ... never paid attention to that. Check meson64 default-next-dev kernel config(s) and sent a PR with changes - what needs to be enabled.
riwaha Posted March 16, 2019 Author Posted March 16, 2019 I am sorry, it's 5.75 stable Ubuntu 18.04.2 LTS 4.19.20-meson64, branch next. I won't be near it for a while, so I can't get the armbianmonitor -u unfortunately.
riwaha Posted March 18, 2019 Author Posted March 18, 2019 On 3/16/2019 at 9:27 AM, Igor said: Without armbianmonitor -u I have no idea which kernel you are using ... and kernel (config) is the most likely problem. Docker dependencies should be covered but snap and lxd ... never paid attention to that. Check meson64 default-next-dev kernel config(s) and sent a PR with changes - what needs to be enabled. I got a chance to look into this further. It looks like a patch for the overlay module will be needed, I found a commit that enabled mounting in user namespaces for overlay fstype in ubuntu-xenial , it is still used in ubuntu-bionic. I just tested it on 4.19.y branch and it fixes the issue. I have forked armbian/build, and have tested it in meson64-next, should I test it in -default and -dev as well, or should I send a PR with just meson64-next?
Recommended Posts