CODEWITHSUNDEEP
dockerjenkinssystemd
SpaDev
SpaDev

Reputation: 179

Run a container that starts a systemd service

I am trying to create a Jenkins image that will have Jenkins up running with all plugins installed skipping the installation wizard.

I am stuck in the last bit. When I try to start jenkins (last instruction of my Dockerfile) using "systemctl start jenkins" I got the followoing error:

docker: Error response from daemon: OCI runtime create failed: container_linux.go:345: starting container process caused "exec: \"systemctl start jenkins\": executable file not found in $PATH": unknown.

After checking https://developers.redhat.com/blog/2019/04/24/how-to-run-systemd-in-a-container/ and https://developers.redhat.com/blog/2014/05/05/running-systemd-within-docker-container/

I tried with :

ENTRYPOINT:["/sbin/init"]

The result was:

a container was running but the service was not up.

[manuel@master useCaseJenkins]$ docker container run --name jenkins -d -p 8081:8080 manrodri/jenkins_use_case
2272206cdb8ce9483adfdaf4cbba5299c7d337dbe1b1e96e99a19821abd328e4

$ docker container ls 
CONTAINER ID        IMAGE                       COMMAND             CREATED             STATUS              PORTS                    NAMES
2272206cdb8c        manrodri/jenkins_use_case   "/sbin/init"        37 seconds ago      Up 36 seconds       0.0.0.0:8081->8080/tcp   jenkins

[manuel@master useCaseJenkins]$ curl http://localhost:8081
curl: (56) Recv failure: Connection reset by peer

the container logs don't show anything at all.

[manuel@master useCaseJenkins]$ docker container logs 2272206cdb8c
[manuel@master useCaseJenkins]$

I tried to run a simple httpd service in the same way as shown in the two sites I mentioned before with the same result. the container was running but nothing was up in port 80.

See my Dockerfile at https://github.com/manrodri/jenkinsUseCase/blob/master/Dockerfile

Upvotes: 0

Views: 1129

Answers (1)

Guido U. Draheim
Guido U. Draheim

Reputation: 3271

You do not need to run systemd in a container in order to have service manager. That's what you really want. ;)

If you want to check out my docker-systemctl-replacement then you can also have a look at the docker-systemctl-images which have some examples for you. At work I am even running Jenkins with that script but it is bit more complicated in its configuration to be shown in public.

Upvotes: 0

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