My sinopia daemon refused to start. After dig out the journal, I found that
ExecStop run straight after
ExecStart, what the…
After some research, I found that for daemons, or any other program that put themselves at the background, systemd thought they are stopped, thus stop the service for you. To prevent this, you need following in your systemd service file:
so your daemons can live happily ever after.
I have learned a lot from Running systemd within a docker container, but it does not actually work in RHEL7, at least not the Red Hat official docker image , because fakesystemd is blocking the way.
Fortunately, I found the Review request of fakesystemd, which offer the way to swap the fakesystemd.
So here is my final docker script systemd_rhel7 (which also run httpd)
MAINTAINER “Ding-Yi Chen” <email@example.com>
ENV container docker
RUN yum -y update
RUN yum -y swap -- remove fakesystemd -- install systemd systemd-libs
RUN yum -y install httpd ; yum clean all
RUN systemctl enable httpd.service
VOLUME [ "/sys/fs/cgroup" ]
To build the image:
docker build -t systemd_rhel7 .
To run the container, note that it may kick you out of the system, but don’t worry, you just login back.
docker run –privileged -ti -v /sys/fs/cgroup:/sys/fs/cgroup:ro -p 80:80 systemd_rhel7
To test it