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Created attachment 1288206[details]
output of systemctl status docker after the last two docker info commands
The act of 'systemctl start container-engine', even once, makes any subsequent 'systemctl start docker' run an unusable docker daemon.
# systemctl disable --now docker
Removed symlink /etc/systemd/system/multi-user.target.wants/docker.service.
# atomic install --system --system-package=no --name container-engine [IMG]
[succeeds]
container-engine has been installed but never run. docker still works:
# systemctl start docker
# docker info
[succeeds]
Stop docker, switch to container-engine:
# systemctl stop docker;systemctl start container-engine
# docker info
[succeeds]
Switch back to docker:
# systemctl stop container-engine;systemctl start docker
# docker info
[15-second pause]
Error response from daemon: plugin rhel-push-plugin failed with error: plugin not found
Subsequent attempts fail differently:
# docker info
An error occurred trying to connect: Get http://%2Fvar%2Frun%2Fdocker.sock/v1.24/info: EOF
systemctl status docker reports it still running and active, but with a panic. See attachment.
I have not yet found a way to get plain docker working again. The obvious first thing to try was rm -rf /run/docker* /run/containerd.sock; it has no effect. rpm -V docker docker-client docker-common docker-rhel-push-plugin reports only /etc/sysconfig/docker* and /var/lib/docker (expected).
docker-1.12.6-39.1.git6ffd653.el7.x86_64
rhel-push-plugin is the same. I don't think it's possible to install docker-x with docker-rhel-push-plugin-y: it's an rpm "=" dependency.
rhel-push-plugin is fine, incidentally:
# rpm -V docker-rhel-push-plugin
[no output]
# ls -lZ /usr/libexec/docker/rhel-push-plugin
-rwxr-xr-x. root root system_u:object_r:container_runtime_exec_t:s0 /usr/libexec/docker/rhel-push-plugin
# atomic version $IMG
IMAGE NAME VERSION IMAGE ID
[...]container-engine:latest 1.12.6-4 7d4eccca7dfc