On Thu, 13 Aug 2009, Les Mikesell wrote:
> Geoff Galitz wrote:
>>
>> ...so I
>> know for a fact updates can break a running system.
>
> On CentOS? Fedora does that all the time but _not_ having behavior-changing
> updates in the long life of a major release is most of the point of 'enterprise'
> distributions. It's probably not perfect - and I wouldn't do auto-updates on
> production servers either but it should at least be very unusual for a CentOS
> update to break anything.
You mean like every time new Apache2 updates come along they
_shouldn't_ break my failover cluster???
I've gotten into the habit of doing this each time I see an "httpd"
update come down 'cuz a reboot will kill the cluster again:
If I did a reboot I need to edit haresources and restart heartbeat
to get my DRBD drive back, then add links back in:
*) Remove "httpd" from the end of /etc/ha.d/haresources
*) Restart heartbeat so that it'll mount my DRBD drive.
*) Fix up the symlinks in /replicated/etc/httpd/:
logs -> ../../var/log/httpd
modules -> /usr/lib64/httpd/modules
run -> /var/run
*) Add "httpd" back into the haresources file.
*) Restart heartbeat to check that the cluster comes up ok.
"httpd" updates remove the symlinks (that maybe "drbdlinks" creates?
Can't recall) which point into my DRBD drive.
If I didn't do a reboot yet then I can fix things up with a subset
of the above 'cuz the DRBD drive will still be mounted.
The above is probably necessary because I'm doing something wrong...
Do I need to break the cluster before the update so that Apache2
doesn't touch the DRBD drive/drbdlinks stuff, then restart the
cluster? That seems likely.
--
Curt Mills, WE7U hacker at fluke dot com
Senior Methods Engineer/SysAdmin
"Lotto: A tax on people who are bad at math!"
"Windows: Microsoft's tax on computer illiterates!" -- WE7U
"The world DOES revolve around me: I picked the coordinate system!"
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