[Pacemaker] Linux HA setup for CentOS 6.5
Andrew Beekhof
andrew at beekhof.net
Thu Oct 16 01:48:11 EDT 2014
On 16 Oct 2014, at 3:31 pm, Alex Samad - Yieldbroker <Alex.Samad at yieldbroker.com> wrote:
> I believe there was a change 6.4 -> 6.5 that moved from openais to cman… I believe in rhel7 it is going back..
No, its going to native corosync (which is quite different to running against a custom plugin loaded into openais).
'cman' here is pretty much openais with a different config file and init script
>
> I ran into this problem when I upgraded my centos 6.2 -> 6.5..
>
> A
>
> From: Sihan Goi [mailto:goister at gmail.com]
> Sent: Thursday, 16 October 2014 3:15 PM
> To: The Pacemaker cluster resource manager
> Subject: Re: [Pacemaker] Linux HA setup for CentOS 6.5
>
> 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:
> 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
>
>
>
> --
> 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
> _______________________________________________
> 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
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 841 bytes
Desc: Message signed with OpenPGP using GPGMail
URL: <https://lists.clusterlabs.org/pipermail/pacemaker/attachments/20141016/17df9f89/attachment-0003.sig>
More information about the Pacemaker
mailing list