[Pacemaker] Linux HA setup for CentOS 6.5
Sihan Goi
goister at gmail.com
Wed Oct 15 04:27:46 EDT 2014
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> 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> 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>> 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>
>>> 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>>
>>>
>>>
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>>>
>>>
>>> --
>>> 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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>>> http://oss.clusterlabs.org/__mailman/listinfo/pacemaker
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>>> <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>
>>>
>>>
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>>> 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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