General questions about failover, config changes and restarting

[S Carr]

On 3 March 2016 at 15:02, James Dore <james.dore at new.ox.ac.uk> wrote:
> Any ideas why my servers need so many restarts? I try to leave them to settle for five or six minutes before trying again, but they just seem to stick with things like
>
> dhcpd.log-20151123:2015-11-23T10:17:58.203346+00:00 garibaldi dhcpd: failover peer newc-dhcp: I move from normal to shutdown
> dhcpd.log-20151123:2015-11-23T10:18:03.848105+00:00 garibaldi dhcpd: failover peer newc-dhcp: I move from shutdown to startup
> dhcpd.log-20151123:2015-11-23T10:18:03.854208+00:00 garibaldi dhcpd: failover peer newc-dhcp: peer moves from normal to communications-interrupted
> dhcpd.log-20151123:2015-11-23T10:18:03.927644+00:00 garibaldi dhcpd: failover peer newc-dhcp: I move from startup to shutdown
> dhcpd.log-20151123:2015-11-23T10:18:03.940208+00:00 garibaldi dhcpd: failover peer newc-dhcp: peer moves from communications-interrupted to partner-down

So what version of DHCPD are you running, a (stupid) feature was
introduced in a particular version (now regressed) to automatically
enter partner-down on a shut down, that is the root of your problems,
you should not be entering partner-down at all as the partner is not
down, and then it has to go through it's recovery stage to get back
into normal mode. Also check the init script to make sure it's not
doing anything silly with omshell to initiate a shutdown as that will
also trigger partner-down.

Others on the list might be able to comment which version this change
was regressed in.

Steve