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Old 10-05-2020, 04:42 AM   #16
berndbausch
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Quote:
Originally Posted by banderas20 View Post
However, If I issue the following command to run the image:

Code:
docker run -ti -v /sys/fs/cgroup:/sys/fs/cgroup:ro centos7-systemd
It crashes with this error:

Code:
Failed to mount tmpfs at /run: Operation not permitted
[!!!!!!] Failed to mount API filesystems, freezing.
Exactly the same thing happened to me. No idea why, but the Stackoverflow thread saved me.
 
Old 10-05-2020, 04:46 AM   #17
berndbausch
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In short: First start the default process in the container, which is /sbin/init (see the Dockerfile). This runs systemd. Then run a shell inside the container, install sshd and start it with systemctl.
Quote:
Originally Posted by banderas20 View Post
This last part I didn't understand. Anyway, I finally managed to get it up and running.
I mean that the first command is docker run. It launches the process defined by CMD ["/usr/sbin/init"] in the Dockerfile. This also launches systemd.
Second step: Run a shell in this container with docker exec. From this shell, you can install sshd and start it.
 
Old 10-06-2020, 03:33 AM   #18
banderas20
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@berndbausch,

thanks a million, mate!
 
  


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