Add systemctl resource agent to manage systemd services.

[sebastic]

An alternative to LSB resource agents.

We're using it at $DAYJOB for about a year now.

[knet-ci-bot]

Can one of the admins verify this patch?

[oalbrigt]

Pacemaker supports running systemd services as "agents", so what's the point in using this agent instead?

[sebastic]

It's an alternative.

I developed it back then because I didn't find documentation how to use systemd services with pacemaker.

That documentation is still hard to find.

[oalbrigt]

@kgaillot Sounds like we should consider making the systemd documentation easier to find (and maybe mention it where appropriate).

[kpfleming]

Agreed! I'm using the systemd RA and it works fine, but there is literally zero documentation available for it.

[kgaillot]

There's a brief mention in "Pacemaker Explained", but it could definitely be improved.