[Pacemaker] Linux HA setup for CentOS 6.5
Sihan Goi
goister at gmail.com
Thu Oct 16 00:14:59 EDT 2014
After following the guide, I've successfully managed to get Apache server
up and running in the cluster as an active/passive setup, but with some
differences. My cluster stack is stated as being cman while the guide's is
openais. Not sure if that's a problem. Also, some commands in the guide
don't seem to work.
I'm moving on to DRBD installation now, but when I do a "yum install
drbd-pacemaker drbd-udev", these packages are not available. After some
googling, it seems that drbd83-utils/kmod-drbd83 or
drbd84-utils/kmod-drbd84 is available via another repo. Does this work with
the guide?
On Thu, Oct 16, 2014 at 9:35 AM, Sihan Goi <goister at gmail.com> wrote:
> 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>>>
>>>
>>>
>>> ___________________________________________________
>>> Pacemaker mailing list:
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>>> <mailto:Pacemaker at oss.clusterlabs.org>
>>> <mailto: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>
>>>
>>> <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>
>>>
>>> <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>
>>> <mailto: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>
>>>
>>> <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>
>>>
>>>
>>> <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>>
>>>
>>>
>>> _________________________________________________
>>> 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
>>>
>>>
>>>
>>> --
>>> 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
>
--
- Goi Sihan
goister at gmail.com
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