I am able to run the openSuSE container opensuse/leap:42.3 from Docker Hub. I am using a Ubuntu 16.04 server as my host.
However, when installing software via zypper in the container, I am seeing occasional errors of the form:
(38/42) Installing: policycoreutils-2.5-6.4.1.x86_64 ..................................................................................... Additional rpm output: Failed to connect to bus: No such file or directory Created symlink from /etc/systemd/system/multi-user.target.wants/restorecond.service to /usr/lib/systemd/system/restorecond.service.
Looking around, it looks like this is related to systemd not being used as the default init service for the container. However, that seems to be wrong, since:
- /sbin/init is present and symlinked to systemd
- systemd appears to have been the default since SuSE 12.3
- Attempting to install systemd or systemd-sysvinit indicates that those packages are already initialized.
I also looked at other suggestions:
- Running the container with /sbin/init as the entrypoint / default for CMD. That results in the container hanging completely.
docker run -i -t --rm -m 4g -e container=docker opensuse/leap:42.3 /sbin/init
- Mounting /run and /sys/fs/cgroups from host to container. No luck. Same problem as above.
docker run -i -t --rm -m 4g -e container-docker -v /run -v /sys/fs/cgroup:/sys/fs/cgroup:ro ose /sbin/init
In both cases, the Docker daemon or container or host freezes with:
!!!!!!] Failed to mount API filesystems, freezing. Freezing execution.
I am OK with ignoring the original error but it seems like this could cause other less obvious errors.
What should I do to fix this? I would prefer not to run the containers with SYS_ADMIN privileges or as a fully privileged container.
5c652285b5a4:/ # uname -a Linux 5c652285b5a4 4.13.0-39-generic #44~16.04.1-Ubuntu SMP Thu Apr 5 16:43:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
cdpteam@cxtlxbld2:~$ uname -a Linux cxtlxbld2 4.13.0-39-generic #44~16.04.1-Ubuntu SMP Thu Apr 5 16:43:10 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
cdpteam@cxtlxbld2:~$ docker info Containers: 1 Running: 1 Paused: 0 Stopped: 0 Images: 11 Server Version: 18.03.1-ce Storage Driver: overlay2 Backing Filesystem: extfs Supports d_type: true Native Overlay Diff: true Logging Driver: json-file Cgroup Driver: cgroupfs Plugins: Volume: local Network: bridge host ipvlan macvlan null overlay Log: awslogs fluentd gcplogs gelf journald json-file logentries splunk syslog Swarm: inactive Runtimes: cc-runtime runc Default Runtime: runc Init Binary: docker-init containerd version: 773c489c9c1b21a6d78b5c538cd395416ec50f88 runc version: 4fc53a81fb7c994640722ac585fa9ca548971871 init version: 949e6fa Security Options: apparmor seccomp Profile: default Kernel Version: 4.13.0-39-generic Operating System: Ubuntu 16.04.4 LTS OSType: linux Architecture: x86_64 CPUs: 4 Total Memory: 15.39GiB Name: cxtlxbld2 ID: 44MA:AQXY:4ZTA:SMTC:U6SD:RWRR:YMRX:N2W3:BNMI:SKIV:JBX2:YVYN Docker Root Dir: /z/d Debug Mode (client): false Debug Mode (server): true File Descriptors: 26 Goroutines: 37 System Time: 2018-08-01T18:01:11.407778634Z EventsListeners: 0 Registry: https://index.docker.io/v1/ Labels: Experimental: true Insecure Registries: 127.0.0.0/8 Live Restore Enabled: false
Client: Version: 18.03.1-ce API version: 1.37 Go version: go1.9.5 Git commit: 9ee9f40 Built: Thu Apr 26 07:17:20 2018 OS/Arch: linux/amd64 Experimental: false Orchestrator: swarm Server: Engine: Version: 18.03.1-ce API version: 1.37 (minimum version 1.12) Go version: go1.9.5 Git commit: 9ee9f40 Built: Thu Apr 26 07:15:30 2018 OS/Arch: linux/amd64 Experimental: true