Re:Docker Raises $95M Series D Round for Its Container Platform
by otterley on Tuesday April 14, 2015 @09:39AM
(#9374103)
I thought we were talking about Docker, not systemd. systemd is pretty powerful, but you have to write the glue Docker is providing yourself.
If you mean a scenario where Docker launches systemd, we don't do that. In my view Docker is just a packaging system; each container's pid 1 is the app we're deploying.
Re:Docker Raises $95M Series D Round for Its Container Platform
by chimeracoder on Tuesday April 14, 2015 @09:45AM
(#9374151)
> If you mean a scenario where Docker launches systemd, we don't do that. In my view Docker is just a packaging system; each container's pid 1 is the app we're deploying.
No, systemd is actually capable of running Docker containers directly (even without Docker).
I definitely wouldn't recommend running systemd inside a container unless you're using systemd to launch the container (instead of Docker), since Docker doesn't handle init systems very well, whereas systemd has this built-in. Though you can also go with the one-app-process-per-container approach as well with systemd, which also works.
Re:Docker Raises $95M Series D Round for Its Container Platform
by otterley on Tuesday April 14, 2015 @10:25AM
(#9374463)
If you have any citations that describe how to make systemd run Docker containers without Docker, I'd like to see them.
Re:Docker Raises $95M Series D Round for Its Container Platform
by grosskur on Tuesday April 14, 2015 @09:12PM
(#9378349)
Starting with systemd 219, you can download a Docker image from a registry with "machinectl pull-dkr", and run it with "machinectl start":
http://www.freedesktop.org/software/systemd/man/machinectl.h...
Sure there is. Systemd will actually do this for you.
Docker recently eschewed LXC, and I'm still not sure I understand exactly why, but even after the move to libcontainer, systemd is capable of handling this.