Failed to get D-Bus connection: Operation not permitted

Question

I\'m trying to install ambari 2.6 on a docker centos7 image but in the the ambari setup step and exactly while initializing the postgresql db I receive this error:

Answer 1

Run this command:

docker run -it -p 1001:25 --name postfix1 --privileged -d   --cap-add=SYS_ADMIN -v /sys/fs/cgroup:/sys/fs/cgroup:ro postfix

Answer 2

Use this command

docker run -d -it --privileged IMAGE /usr/sbin/init

And access root in container

systemctl start httpd.service

This should work!

Answer 3

On Centos7 all the services are started and stopped throught the systemd daemon. The systemctl command will simply try to talk to the daemon by using a d-bus channel - and that's where the message comes from.

Instead of running a container in priviledged mode (so it is not really contained) you could also try out the docker-systemctl-replacement to avoid the situation.