Pacemaker on Sébastien Han

Last friday failover and Stonith were evil...

Mon, 26 Nov 2012 19:10:00 +0000

Friday, end of the week, almost week-end, almost time to enjoy the warm weather of my hometown and yet…

Manage your symlinks with Pacemaker

Thu, 01 Nov 2012 01:07:00 +0000

Manages symlinks into a shared partition, which is shared among several machines.

Highly Available LVS

Fri, 19 Oct 2012 01:17:00 +0000

Highly Available LVS.

Galera arbitrator resource agent

Wed, 10 Oct 2012 14:50:00 +0000

If you run XtraDB/Galera in a 2 nodes cluster, it implies that on a split-brain event both nodes will goes down. That’s the default behavior of the cluster management system of Galera. This could be changed but we don’t really want that. This is why we use garbd in order to prevent split-brain situation. Basically it connects to your cluster and acts as a member. Let’s say someone, inadvertently bring down the dedicated link interface of your cluster, you’re in big trouble. In this particular situation garbd will act as a replication replay. That will let you some time to investigate about the outage without any downtime.

Pacemaker load-balancing with Clone

Sun, 16 Sep 2012 02:13:00 +0000

Introducing the load-balancing feature with Pacemaker.

Fencing LXC containers with STONITH

Tue, 11 Sep 2012 18:39:00 +0000

Introducing fencing on LXC container.

Corosync: Redundant Ring Protocol

Wed, 01 Aug 2012 22:59:00 +0000

Putting a Lord of the Rings picture could have been too cliché, so I opted for this… RRP abbreviation stands for Redundant Ring Protocol. A way to achieve HA on top of bonded interface.

Differences between active-active and active-passive cluster

Sat, 26 May 2012 22:30:00 +0000

Common thoughts and working of clustering forms. Pick up from the Sybase HA documentation. Good reminder :-)

Failover active/passive on NFS using Pacemaker and DRBD

Mon, 30 Apr 2012 19:19:00 +0000

Bring High-availability to your NFS server!

Simply audit a pacemaker based cluster

Fri, 27 Apr 2012 09:35:00 +0000

Simply audit a cluster platform based on pacemaker.

Respawn a pacemaker cluster

Thu, 26 Apr 2012 12:03:00 +0000

Issue type: pacemaker nfs/drbd cluster

6 posts all around the web
- 2 deviant from my configuration
- the rest.. no answer.

Seems legit.

LSB Compatibility Checks script

Sun, 22 Apr 2012 14:01:00 +0000

Sometimes you want to provide high availability on a service. Unfortunately there is no resource agent available by the provider. Thus you have to use the LSB script, which is also fine. Before that you just have to be sure that your LSB script is compatible. I wrote a simple bash script to figure this out :).

Active/Passive failover cluster on a MySQL Galera Cluster with HAProxy (custom ocf agent)

Thu, 19 Apr 2012 22:36:00 +0000

As promised, I will use a custom ocf agent for managing my HAProxy cluster

RAID Over IP en mode Actif/Passif sur un failover cluster

Mon, 18 Jul 2011 20:54:00 +0000

Suite des tutos sur le haute disponibilité. Après avoir configuré des disques en RAID, mis 2 serveurs en cluster avec gestion du failover nous allons maintenant mettre en place du RAID 1 Over IP afin de disposer des mêmes données sur les disques de chaque serveurs membres du cluster. La topologie proposée est basée sur du RAID 0 sur les serveurs. Ici on passe aux choses sérieuses mais ne vous en faites pas vous êtes déjà des As du cluster !

Introduction au cluster sous Linux

Mon, 04 Jul 2011 20:21:00 +0000

Ce tutoriel fait suite à celui sur la mise en place de RAID. Après avoir apporté de la redondance et de la tolérance de panne aux disques contenant les données il est également important voir crucial de faire la même chose pour les serveurs.