Jake Smith [[email protected]] kirjoitti:
----- Original Message -----
> From: "Andreas Kurz" <[email protected]>
> To: [email protected]
> Sent: Thursday, October 4, 2012 9:50:52 AM
> Subject: Re: [Pacemaker] apache on too many nodes?
>
> On 10/03/2012 10:47 PM, Jake Smith wrote:
> >
> >
> >
> > ----- Original Message -----
> >> From: [email protected]
> >> To: [email protected]
> >> Sent: Wednesday, October 3, 2012 4:36:10 PM
> >> Subject: [Pacemaker] apache on too many nodes?
> >>
> >> Hello,
> >>
> >> I'm currently testing out a 2 node system with the simple goal of
> >> providing failover so that the services are run on one node at a
> >> time.
> >> I have some of the mysql and apache configuration files in the
> >> drbd
> >> partition.
> >>
> >> Without apache everything works as expected drbd and mysql start
> >> and
> >> stop properly on the nodes, but as soon as i try to put apache
> >> into
> >> to mix nothing works anymore.
> >>
> >> Using the following configuration:
> >>
> >> primitive drbd ocf:linbit:drbd params drbd_resource="drbd" op
> >> start
> >> interval="0" timeout="240s" op stop interval="0" timeout="100s"
> >> ms drbd_ms drbd meta master-max="1" master-node-max="1"
> >> clone-max="2"
> >> clone-node-max="1" notify="true"
> >> primitive drbd_fs ocf:heartbeat:Filesystem params
> >> device="/dev/drbd0"
> >> directory="/mnt/drbd" fstype="ext3" op start interval="0"
> >> timeout="60" op stop interval="0" timeout="120"
> >> primitive service_mysqld lsb:mysql op monitor interval="15s"
> >> primitive service_apache lsb:apache2 op monitor interval="15s"
> >> group services_group service_mysqld service_apache
> >> colocation lamp_services inf: drbd_fs drbd_ms:Master
> >> services_group
> >
> > Pretty sure your colocation is the problem - services_group should
> > be first not last...
> >
> > colocation lamp_services inf: services_group drbd_fs drbd_ms:Master
>
> It has to be:
>
> colocation lamp_services inf: drbd_fs services_group drbd_ms:Master
>
Oooh thanks for the correction Andreas - didn't know that the group would be
paired with a primitive to create a set! And I concur - much clearer/easier if
you just put the fs in the group.
Jake
> ... if you really want to use resource-sets, I'd recommend putting
> the
> fs into the services_group on the first position to avoid confusion
> and use:
>
> colocation lamp_services inf: services_group drbd_ms:Master
>
> You disabled automatic start via init for apache & mysql? You checked
> the apache LSB script for LSB compliance?
apache doesen't start on startup and the init scripts are LSB compilant.
I think there is something in the way apache starts. I had the apache
configuration files in the drbd partition
Which does work if I simply removed apache from the pacemaker configuration and
started it manually.
Now i have apache configuration files on both nodes seperately.
It does take a minute or so to start up with a buch of:
[Fri Oct 05 03:21:14 2012] [notice] Apache/2.2.16 (Debian)
PHP/5.3.3-7+squeeze14 with Suhosin-Patch configured -- resuming normal
operations
[Fri Oct 05 03:21:14 2012] [notice] caught SIGTERM, shutting down
[Fri Oct 05 03:21:15 2012] [notice] Apache/2.2.16 (Debian)
PHP/5.3.3-7+squeeze14 with Suhosin-Patch configured -- resuming normal
operations
[Fri Oct 05 03:21:15 2012] [notice] caught SIGTERM, shutting down
Fri Oct 05 03:21:48 2012] [notice] Apache/2.2.16 (Debian) PHP/5.3.3-7+squeeze14
with Suhosin-Patch configured -- resuming normal operations
[Fri Oct 05 03:21:48 2012] [notice] caught SIGTERM, shutting down
[Fri Oct 05 03:21:49 2012] [notice] Apache/2.2.16 (Debian)
PHP/5.3.3-7+squeeze14 with Suhosin-Patch configured -- resuming normal
operations
in apache error log, but it does eventually work as expected.
I also ended up removing the group as it seemed unneccessary
primitive drbd ocf:linbit:drbd params drbd_resource="drbd" op start interval="0" timeout="240s" op
stop interval="0" timeout="100s"
ms drbd_ms drbd meta master-max="1" master-node-max="1" clone-max="2" clone-node-max="1"
notify="true"
primitive drbd_fs ocf:heartbeat:Filesystem params device="/dev/drbd0" directory="/mnt/drbd" fstype="ext3" op start
interval="0" timeout="60" op stop interval="0" timeout="120"
primitive service_mysqld lsb:mysql op monitor interval="15s"
primitive service_apache lsb:apache2 op monitor interval="15s"
colocation lamp_services inf: service_apache app_ip service_mysqld drbd_fs
drbd_ms:Master
order lamp_order inf: drbd_ms:promote drbd_fs:start app_ip:start
service_mysqld:start service_apache:start
I still don't quite understand why apache is behaving this way.
Many thanks to both of you!
:Mrv
>
> Regards,
> Andreas
>
> --
> Need help with Pacemaker?
> http://www.hastexo.com/now
>
> >
> > because you want the services group to run on the same node as the
> > drbd filesystem which has to run on the same node as the drbd
> > Master.
> >
> >> order lamp_order inf: drbd_ms:promote drbd_fs:start
> >> services_group:start
> >>
> >> I think it wants to start apache on both nodes for some reason
> >> (and
> >> fails ofcourse) and promptly stops everything.
> >>
> >> service_apache (lsb:apache2) Started (unmanaged) FAILED[ node1
> >> node2
> >> ]
> >>
> >> I'm probably doing something stupid here. Using debian squeeze.
> >>
> >> :Mrv
> >>
> >>
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> >>
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> >>
> >>
> >
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> >
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> >
>
>
>
>
>
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>
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>
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