[Pacemaker] DRBD with Pacemaker on CentOs 6.5

[Andrew Beekhof]

> On 27 Oct 2014, at 6:05 pm, Sihan Goi <goister at gmail.com> wrote:
> 
> Hi,
> 
> That offending line is as follows:
> DocumentRoot "/var/www/html"
> 
> I'm guessing it needs to be updated to the DRBD block device, but I'm not sure how to do that, or even what the block device is.
> 
> fdisk -l shows the following, which I'm guessing is the block device?
> /dev/mapper/vg_node02-drbd--demo
> 
> lvs shows the following:
> drbd-demo vg_node02 -wi-ao----  1.00g
> 
> btw I'm running the commands on node02 (secondary) rather than node01 (primary). It's just a matter of convenience due to the physical location of the machine. Does it matter?

Um, you need to mount /dev/mapper/vg_node02-drbd--demo to /var/www/html with a FileSystem resource.
Have you not done this?

> 
> Thanks.
> 
> On Mon, Oct 27, 2014 at 11:35 AM, Andrew Beekhof <andrew at beekhof.net> wrote:
> Oct 27 10:28:44 node02 apache(WebSite)[10515]: ERROR: Syntax error on line 292 of /etc/httpd/conf/httpd.conf: DocumentRoot must be a directory
> 
> 
> 
> > On 27 Oct 2014, at 1:36 pm, Sihan Goi <goister at gmail.com> wrote:
> >
> > Hi Andrew,
> >
> > Logs in /var/log/httpd/ are empty, but here's a snippet of /var/log/messages right after I start pacemaker and do a "crm status"
> >
> > http://pastebin.com/ivQdyV4u
> >
> > Seems like the Apache service doesn't come up. This only happens after I run the commands in the guide to configure DRBD.
> >
> > On Fri, Oct 24, 2014 at 8:29 AM, Andrew Beekhof <andrew at beekhof.net> wrote:
> > logs?
> >
> > > On 23 Oct 2014, at 1:08 pm, Sihan Goi <goister at gmail.com> wrote:
> > >
> > > Hi, can anyone help? Really stuck here...
> > >
> > > On Mon, Oct 20, 2014 at 9:46 AM, Sihan Goi <goister at gmail.com> wrote:
> > > Hi,
> > >
> > > I'm following the "Clusters from Scratch" guide for Fedora 13, and I've managed to get a 2 node cluster working with Apache. However, once I tried to add DRBD 8.4 to the mix, it stopped working.
> > >
> > > I've followed the DRBD steps in the guide all the way till "cib commit fs" in Section 7.4, right before "Testing Migration". However, when I do a crm_mon, I get the following "failed actions".
> > >
> > > Last updated: Thu Oct 16 17:28:34 2014
> > > Last change: Thu Oct 16 17:26:04 2014 via crm_shadow on node01
> > > Stack: cman
> > > Current DC: node02 - partition with quorum
> > > Version: 1.1.10-14.el6_5.3-368c726
> > > 2 Nodes configured
> > > 5 Resources configured
> > >
> > >
> > > Online: [ node01 node02 ]
> > >
> > > ClusterIP    (ocf::heartbeat:IPaddr2):    Started node02
> > >  Master/Slave Set: WebDataClone [WebData]
> > >      Masters: [ node02 ]
> > >      Slaves: [ node01 ]
> > > WebFS   (ocf::heartbeat:Filesystem):    Started node02
> > >
> > > Failed actions:
> > >     WebSite_start_0 on node02 'unknown error' (1): call=278, status=Timed Out, last-rc-change='Thu Oct 16 17:26:28 2014', queued=20000ms, exec=0ms
> > >     WebSite_start_0 on node01 'unknown error' (1): call=203, status=Timed
> > > Out, last-rc-change='Thu Oct 16 17:26:09 2014', queued=20000ms, exec=0ms
> > >
> > > Seems like the apache Website resource isn't starting up. Apache was
> > > working just fine before I configured DRBD. What did I do wrong?
> > >
> > > --
> > > - Goi Sihan
> > > goister at gmail.com
> > >
> > >
> > >
> > > --
> > > - Goi Sihan
> > > goister at gmail.com
> > > _______________________________________________
> > > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> > >
> > > Project Home: http://www.clusterlabs.org
> > > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > > Bugs: http://bugs.clusterlabs.org
> >
> >
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs: http://bugs.clusterlabs.org
> >
> >
> >
> > --
> > - Goi Sihan
> > goister at gmail.com
> > _______________________________________________
> > Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> > http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> >
> > Project Home: http://www.clusterlabs.org
> > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> > Bugs: http://bugs.clusterlabs.org
> 
> 
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org
> 
> 
> 
> -- 
> - Goi Sihan
> goister at gmail.com
> _______________________________________________
> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
> http://oss.clusterlabs.org/mailman/listinfo/pacemaker
> 
> Project Home: http://www.clusterlabs.org
> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf
> Bugs: http://bugs.clusterlabs.org