Difference between revisions of "User talk:Gertp"
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== Generic active/passive clusters == | == Generic active/passive clusters == | ||
| − | Configuring a cluster using corosync and heartbeat | + | Configuring a cluster using corosync and heartbeat involves you having to write a start/stop and monitoring script for the service you are building the cluster for. |
| − | This script is very much like an "init.d" script, but you can't directly use an init.d script as heartbeat scripts use tri-state logic in stead of two-state logic. I.e., heartbeat controlled services are "running", "stopped" or "failed". | + | This script is very much like an "init.d" script, but you can't directly use an init.d script as heartbeat scripts use tri-state logic in stead of two-state logic. I.e., heartbeat controlled services are "running", "stopped" or "failed", whereas services controlled by init that fail are stopped and must be restarted. Heartbeat uses the third state "failed" as the trigger to migrate the service to another node in your service grid. |
Revision as of 14:27, 28 March 2011
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BDII setup on active/passive failover cluster
Generic active/passive clusters
Configuring a cluster using corosync and heartbeat involves you having to write a start/stop and monitoring script for the service you are building the cluster for.
This script is very much like an "init.d" script, but you can't directly use an init.d script as heartbeat scripts use tri-state logic in stead of two-state logic. I.e., heartbeat controlled services are "running", "stopped" or "failed", whereas services controlled by init that fail are stopped and must be restarted. Heartbeat uses the third state "failed" as the trigger to migrate the service to another node in your service grid.
Install the cluster engine & resource manager
You need to perform the installation on each cluster node.
Add the EPEL repo to /etc/yum.repos.d:
# rpm -Uhv http://download.fedora.redhat.com/pub/epel/5/x86_64/epel-release-5-4.noarch.rpm
Add the Clusterlabs repo to /etc/yum.repos.d:
# wget -O /etc/yum.repos.d/pacemaker.repo http://clusterlabs.org/rpm/epel-5/clusterlabs.repo
Now have yum install the cluster engine and resource managers. This will install loads of dependencies:
# yum -y install pacemaker
