[ClusterLabs] Bloody Newbie needs help for OCFS2 on pacemaker+corosync+pcs

Tue Aug 2 13:16:56 UTC 2016

Hello Kyle + all,

No luck at all. Cant get o2cb up at all. Please find details below. Thanks in advance for any help.

First I tried to translate your crm syntax to pcs syntax:

primitive p_o2cb lsb:o2cb \
        op monitor interval="10" timeout="30" \
        op start interval="0" timeout="120" \
        op stop interval="0" timeout="120"

  |||
  vvv

# pcs resource create ResO2CB lsb:o2cb \
        op monitor interval="10" timeout="30" \
        op start interval="0" timeout="120" \
        op stop interval="0" timeout="120"

Error: Unable to create resource 'lsb:o2cb', it is not installed on this system (use --force to override)

I checked my installation and found this:

# rpm -ql pacemaker | grep o2cb
/usr/share/man/man7/ocf_pacemaker_o2cb.7.gz

According this, I would expect /usr/lib/ocf/resource.d/pacemaker/o2cb but there is no such script.

But I succeeded in:

# pcs resource create --force ResO2CB ocf:pacemaker:o2cb \
    op monitor interval="10" timeout="30" \
    op start interval="0" timeout="120" \
    op stop interval="0" timeout="120"

# pcs resource show
...
ResO2CB        (ocf::pacemaker:o2cb):  Stopped
...

Trying to debug-start:

# pcs resource debug-start ResO2CB
Error performing operation: Input/output error

# rpm -qi pacemaker
Name        : pacemaker
Version     : 1.1.13
Release     : 10.el7
Architecture: x86_64
Install Date: Sa 23 Jul 2016 15:23:51 CEST
Group       : System Environment/Daemons
Size        : 1400509
License     : GPLv2+ and LGPLv2+
Signature   : RSA/SHA256, Sa 21 Nov 2015 19:24:37 CET, Key ID 72f97b74ec551f03
Source RPM  : pacemaker-1.1.13-10.el7.src.rpm
Build Date  : Sa 21 Nov 2015 18:10:40 CET
...

It seems that o2cb script is missing in that RPM. Or did I miss to install any package?

Best Regards

Thomas Hluchnik

Am Tuesday 02 August 2016 12:39:27 schrieb Kyle O'Donnell:
> er forgot
> 
> primitive p_o2cb lsb:o2cb \
>         op monitor interval="10" timeout="30" \
>         op start interval="0" timeout="120" \
>         op stop interval="0" timeout="120"
> 
> ----- Original Message -----
> From: "Kyle O'Donnell" <kyleo at 0b10.mx>
> To: "users" <users at clusterlabs.org>
> Sent: Tuesday, August 2, 2016 6:38:11 AM
> Subject: Re: [ClusterLabs] Bloody Newbie needs help for OCFS2 on	pacemaker+corosync+pcs
> 
> primitive mysan ocf:heartbeat:Filesystem \
>         params device="/dev/myocsdevice" directory="/mymount" fstype="ocfs2" options="rw,noatime" \
>         op monitor timeout="40" interval="20" depth="0"
> clone cl_ocfs2mgmt p_o2cb \
>         meta interleave="true"
> clone cl_mysan mysan \
>         meta target-role="Started"
> order o_myresource_fs inf: cl_mysan myresource
> 
> 
> ----- Original Message -----
> From: thl at it-hluchnik.de
> To: "users" <users at clusterlabs.org>
> Sent: Tuesday, August 2, 2016 6:31:44 AM
> Subject: [ClusterLabs] Bloody Newbie needs help for OCFS2 on	pacemaker+corosync+pcs
> 
> Hello everybody,
> I am new to pacemaker (and to this list), trying to understand pacemaker. For this I created three virtual hosts in my VirtualBox plus four shared disks, attached with each of the three nodes.
> 
> I installed Oracle Enterprise Linux 7.1, did a "yum update" and got OEL7.2.
> Then I created four OCFS2 devices, working fine on all of my three nodes. They are started by systemd, using o2cb.service and ocfs2.service and running fine.
> 
> Now I have started with learning pacemaker by "Clusters from Scratch" and meanwhile I have a virtual IP and a Webserver, this works fine so far.
> 
> Next I want to control my OCFS2 devices by pacemaker, not by systemd. I searched the net and found some howtos, but they rely on crmsh instead of pcs. Most headaches come from DRBD which I don't understand at all. Why the hell does it seem that I need DRBD for running OCFS2?
> 
> Is there anybody who can explain me how to get that running (after disabling o2cb.service & ocfs2.service):
> 
> - create a resource which manages and controls o2cb stack
> - create another resource which manages OCFS2 mountpoints
> - create constraints for the Web Server (all Apache config / content shall be copied to one of the OCFS2 filesystems)
> 
> The Web Server shall be dependent from availability of a mounted OCFS2 device. If it stops working, the Web Server must switch to a node where that mount point is OK.
> 
> Thanks in advance for any help
> 
> Thomas Hluchnik
> 
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