Centos – Docker, System has not been booted with systemd as init system (PID 1). Can’t operate

centosdocker

I am trying to create docker container for one of the centos service created by us.

We have 2 rpm files.

After installing on base image of centos 8.

I installed those 2 rpm files in it.

But, when I try to start the service, I am getting this error. when I ran
systemctl start <service_name>

System has not been booted with systemd as init system (PID 1). Can't operate

Failed to connect to bus: Host is down

Based, on the feedback of different posts, I tried creating container with below steps.

docker run -it -p 8080:80 -p 16700:16700 centos

docker run -it -p 8080:80 -p 16700:16700 –privileged=true centos

Both same issue. Please suggest.

Best Answer

Docker is designed around the idea of a single service per container. While there are workarounds to get systemd running in a container those are AFAIK only useful in the context of ci test jobs.

Instead of starting the process with systemctl find the actual command executed by systemd when running systemctl start servicename by looking for the ExecStart instruction in the unit file of the service. That is the command (you might need to adjust it a bit) which should be set as the CMD instruction in the Dockerfile.

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