[Pacemaker] Linux HA setup for CentOS 6.5
Sihan Goi
goister at gmail.com
Thu Oct 16 01:35:45 UTC 2014
Hi,
Thanks for the guide! I thought I had the same exact version...mine is also
named "Pacemaker 1.1 Clusters from Scratch Creating Active/Passive and
Active/Active Clusters on Fedora Edition 5", but my version of the document
is meant for Fedora 17, and uses pcs and systemctl calls which don't exist
on CentOS 6.5. I was trying to get it to work on CentOS 7 but realized
support for DRBD on CentOS 7 is really lacking.
I'll refer to the version you posted from hereon.
On Wed, Oct 15, 2014 at 11:43 PM, Digimer <lists at alteeve.ca> wrote:
> Let pacemaker start cman/corosync on EL6.
>
> This is the guide that covers it, written by Pacemaker's author:
>
> http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html-
> single/Clusters_from_Scratch/index.html
>
> It notes that it's based on Fedora 13, but that maps to EL6 almost
> perfectly.
>
> A very slightly altered approach is here, in my *very* unfinished tutorial:
>
> https://alteeve.ca/w/Anvil!_Tutorial_3_on_EL6#Configuring_the_Anvil.21
>
> The main difference is that Andrew's approach (see section 8.2.2) is to
> disable quorum via editing /etc/sysconfig/cman, where my approach handles
> it in the main /etc/cluster/cluster.conf (cman's main config file).
>
> In any case, from then on, start pacemaker and let it handle everything
> else.
>
> Cheers
>
> digimer
>
> On 15/10/14 04:27 AM, Sihan Goi wrote:
>
>> Hi,
>>
>> So I've decided to make things simpler and go with a wired network
>> instead of wireless. I connected both boxes to a router, manually edited
>> the ifcfg-eth0 files to set static IP addresses for both boxes (not
>> before downloading and building a driver for the nic of 1 of the boxes),
>> did a "chkconfig NetworkManager off", "service NetworkManager stop", and
>> "service network restart".
>>
>> I'm able to ping each other via IP address and hostname. I also already
>> have corosync, pacemaker, crmsh and cman installed.
>>
>> I then did the following as per the guide at
>> http://geekpeek.net/linux-cluster-corosync-pacemaker
>>
>> service corosync start - success.
>> service pacemaker start - I get a "Starting cman...corosync cluster
>> engine is already running [FAILED]"
>>
>> What's up? :(
>>
>> On Oct 15, 2014 12:23 PM, "Sihan Goi" <goister at gmail.com
>> <mailto:goister at gmail.com>> wrote:
>>
>> No typo.
>>
>> [root at node02 network-scripts]# ls -lah
>> /etc/sysconfig/network-scripts/ifcfg-*
>> -rw-r--r--. 1 root root 254 Oct 10 2013
>> /etc/sysconfig/network-scripts/ifcfg-lo
>>
>> I installed CentOS 6.5 with the LiveDVD. I found it weird as well
>> that these files were missing.
>>
>> On Wed, Oct 15, 2014 at 11:54 AM, Digimer <lists at alteeve.ca
>> <mailto:lists at alteeve.ca>> wrote:
>>
>> Sure there isn't a typo there?
>>
>> an-c05n01:~# ls -lah /etc/sysconfig/network-__scripts/ifcfg-*
>> -rw-r--r--. 1 root root 225 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-bond0
>> -rw-r--r--. 1 root root 220 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-bond1
>> -rw-r--r--. 1 root root 198 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-bond2
>> -rw-r--r--. 1 root root 149 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-eth0
>> -rw-r--r--. 1 root root 144 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-eth1
>> -rw-r--r--. 1 root root 152 Mar 14 2013
>> /etc/sysconfig/network-__scripts/ifcfg-eth2
>> -rw-r--r--. 1 root root 149 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-eth3
>> -rw-r--r--. 1 root root 144 Jan 16 2013
>> /etc/sysconfig/network-__scripts/ifcfg-eth4
>> -rw-r--r--. 1 root root 152 Mar 14 2013
>> /etc/sysconfig/network-__scripts/ifcfg-eth5
>> -rw-r--r--. 1 root root 254 Jul 22 09:56
>> /etc/sysconfig/network-__scripts/ifcfg-lo
>> -rw-r--r--. 1 root root 213 Mar 13 2013
>> /etc/sysconfig/network-__scripts/ifcfg-vbr2
>>
>> I've never seen an EL6 install without the files there,
>> 'network' or NetworkManager aside.
>>
>> digimer
>>
>> On 14/10/14 11:32 PM, Sihan Goi wrote:
>>
>> There aren't any config files in
>> /etc/sysconfig/network-__scripts. When I
>> was using CentOS 7, the config files were there
>> (ifcfg-something) but in
>> this CentOS 6.5 installation, they are missing.
>>
>> If is possible to not use cman, and just use corosync and
>> pacemaker? If
>> so, how?
>>
>> On Wed, Oct 15, 2014 at 11:22 AM, Digimer <lists at alteeve.ca
>> <mailto:lists at alteeve.ca>
>> <mailto:lists at alteeve.ca <mailto:lists at alteeve.ca>>> wrote:
>>
>> You can manually configure the wireless LAN without
>> NetworkManager.
>> If you take a look, there should be existing config
>> files in
>> /etc/sysconfig/network-____scripts/ for the wireless
>>
>> connection. I've
>> not done it myself since many Fedora's ago, but I
>> believe you can
>> change NMCONTROLLER="no" and then start it up with
>> /etc/sysconfig/network start. I could be a bit wrong,
>> but I am sure
>> you can make wireless work without NM.
>>
>> Question; Servers with WLAN? I assume these won't be
>> used for corosync?
>>
>> digimer
>>
>>
>> On 14/10/14 11:17 PM, Sihan Goi wrote:
>>
>> Hi,
>>
>> Is there a tutorial showing how to get a basic
>> Linux HA setup with
>> replicated storage (via DRBD) working on CentOS
>> 6.5? I want to have
>> mySQL as the HA resource with the database
>> replicated across the
>> nodes.
>> I've scoured the web for one but it seems that I
>> get stuck in
>> each one
>> somewhere.
>>
>> To elaborate, I have 2 CentOS 6.5 nodes configured
>> with distinct
>> hostnames and static IPs. They are connected to a
>> wireless AP,
>> and can
>> ping each other.
>>
>> I tried following this guide -
>> http://clusterlabs.org/____quickstart-redhat.html
>> <http://clusterlabs.org/__quickstart-redhat.html>
>>
>> <http://clusterlabs.org/__quickstart-redhat.html
>> <http://clusterlabs.org/quickstart-redhat.html>>
>> However, cman will not start when NetworkManager is
>> running, and my
>> nodes cannot connect to the wireless AP without
>> NetworkManager
>> running.
>> Am I missing something or is that the stupidest
>> dependency ever?
>> How is
>> a cluster supposed to work when the nodes aren't
>> connected to
>> one another?
>>
>> I also tried following the "clusters from scratch"
>> guide but
>> that seems
>> to rely on systemctl calls which aren't available
>> on CentOS 6.5.
>>
>> Any help?
>>
>> --
>> - Goi Sihan
>> goister at gmail.com <mailto:goister at gmail.com>
>> <mailto:goister at gmail.com <mailto:goister at gmail.com>>
>> <mailto:goister at gmail.com
>> <mailto:goister at gmail.com> <mailto:goister at gmail.com
>> <mailto:goister at gmail.com>>>
>>
>>
>> ___________________________________________________
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>>
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>>
>> Project Home: http://www.clusterlabs.org
>> Getting started:
>> http://www.clusterlabs.org/____doc/Cluster_from_Scratch.pdf
>> <http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf>
>>
>> <http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf
>> <http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>>
>> Bugs: http://bugs.clusterlabs.org
>>
>>
>>
>> --
>> Digimer
>> Papers and Projects: https://alteeve.ca/w/
>> What if the cure for cancer is trapped in the mind of a
>> person
>> without access to education?
>>
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>>
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>> <http://oss.clusterlabs.org/mailman/listinfo/pacemaker>>
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started:
>> http://www.clusterlabs.org/____doc/Cluster_from_Scratch.pdf
>> <http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf>
>>
>>
>> <http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf
>> <http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>>
>> Bugs: http://bugs.clusterlabs.org
>>
>>
>>
>>
>> --
>> - Goi Sihan
>> goister at gmail.com <mailto:goister at gmail.com>
>> <mailto:goister at gmail.com <mailto:goister at gmail.com>>
>>
>>
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>> http://oss.clusterlabs.org/__mailman/listinfo/pacemaker
>> <http://oss.clusterlabs.org/mailman/listinfo/pacemaker>
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started:
>> http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf
>> <http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>
>> Bugs: http://bugs.clusterlabs.org
>>
>>
>>
>> --
>> Digimer
>> Papers and Projects: https://alteeve.ca/w/
>> What if the cure for cancer is trapped in the mind of a person
>> without access to education?
>>
>> _________________________________________________
>> Pacemaker mailing list: Pacemaker at oss.clusterlabs.org
>> <mailto:Pacemaker at oss.clusterlabs.org>
>> http://oss.clusterlabs.org/__mailman/listinfo/pacemaker
>> <http://oss.clusterlabs.org/mailman/listinfo/pacemaker>
>>
>> Project Home: http://www.clusterlabs.org
>> Getting started:
>> http://www.clusterlabs.org/__doc/Cluster_from_Scratch.pdf
>> <http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf>
>> Bugs: http://bugs.clusterlabs.org
>>
>>
>>
>>
>> --
>> - Goi Sihan
>> goister at gmail.com <mailto: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
>>
>>
>
> --
> Digimer
> Papers and Projects: https://alteeve.ca/w/
> What if the cure for cancer is trapped in the mind of a person without
> access to education?
>
> _______________________________________________
> 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
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