[PATCH] Fix incompatibility between CTDB NFS RPC service restoration and systemd (bug 13860)

[Amitay Isaacs]

On Fri, Mar 29, 2019 at 2:02 PM Martin Schwenke via samba-technical
<samba-technical at lists.samba.org> wrote:
>
> When CTDB detects that NFS RPC services have failed it attempts to
> restart them.  For a subset of services that generally have not had
> their own initscript, CTDB constructs a command-line by hand and starts
> the RPC service directly.
>
> Now that we're testing CTDB on a platform with systemd, we have noticed
> that this plays very badly with systemd and probably any other init
> system that provides fine-grained control over all of the RPC services,
> tracking them with PID files, stopping and starting them carefully.
> For example, let's say that CTDB hand-restarts rpc.statd after a
> failure.  Later, when systemd tries to restart rpc.statd it will be
> unable to do some because it is already running.
>
> So, instead of restarting RPC services manually, do all service
> stops/starts via the NFS call-out.  When systemd is in use those
> restarts are done via systemd.  The default for the call-out is now to
> use systemd, but it can be made to use Sys-V init services via a single
> line change.
>
> A couple of related buglets are also fixed.
>
> Please review and maybe push...
>
> peace & happiness,
> martin

Pushed to autobuild.

Amitay.