A fedora 24 docker image that runs with systemd enabled.

The advantages are:

• no more custom script for running service, just enable them
• log is handled on the journald host
• ripping zombie is properly handled
• signal are properly handled

$ docker run -v /sys/fs/cgroup:/sys/fs/cgroup:ro -t \
    -d --name f24 sathlan/f24-systemd
$ docker exec -ti exec f24 bash

# inside the container
$ dnf install -y nginx
$ systemctl enable nginx
$ systemctl start nginx

Create a simple dockerfile, where you enable the service and redirect the log.

FROM sathlan/f24-systemd
RUN dnf install -y nginx && dnf clean all
RUN sed -ie 's,.*access_log.*,access_log ^Cslog:server=unix:/dev/log;,' /etc/nginx/nginx.conf
RUN systemctl enable nginx

Build in and run it.

$ docker build -t my/nginx .
$ docker run -p 80:80 -v /sys/fs/cgroup:/sys/fs/cgroup:ro -t \
   -d --name nginx my/nginx

From the host you have the access log in the journal.

$ journalctl -f CONTAINER_NAME=nginx -a &
$ curl -s 127.0.0.1:80 >/dev/null

The host should be CentOS or Fedora. The user running the test should have systemd-journal permission to be able to read the host journal.

$ bundle install
$ bundle exec rake spec:f24-systemd
$ bundle exec rake spec:localhost

The test are dependants. You need to run spec:f24-systemd before running spec:localhost as the former create the service inside the image whose log will be checked in the journal.

• vlisivka/docker-centos7-systemd-unpriv