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Old 04-02-2014, 10:18 PM   #1
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Registered: Apr 2014
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Lightbulb Linux Cluster fail over testing

Hi Guys,

I am not much aware of clusters but i have few questions can someone provide the overview as it would be very helpful for me.

How can i perform cluster failover test to see all the services are failing back to other node ? If it is using veritas cluster then what kind of pre-prequisite i need to follow ?

If it is not using veritas cluster then how to check whether host is clustered or not ? if clustered how can i perform failover to other nodes?

If my question is not clear please forgive me and let me know what are the required steps i need to follow this procedure ?

Old 04-02-2014, 11:40 PM   #2
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Location: Eelam
Distribution: Redhat, Solaris, Suse
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Looks so far you haven't deployed any cluster solution. Anyhow, just assume you are running 2 nodes Apache web-server cluster. in-order to access the web services you might have at-least one VIP.
Let say the VIP reside in one node and web-server in another node it will be troublesome. both resource (vip and web-server) must reside in same node.

For fail-over testing just stop the web-server from the master node and monitor the second node whether the web-server and vip moving to the second node if both moved in to your second node seems fail-over is working (just try this first)
Old 04-03-2014, 08:58 PM   #3
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Thanks for the information. i worked on windows cluster as we are doing some array based migrations using mpxtool(block level) copy. Now we are working on linux hosts and usually it is an offline migration.
I see some hosts are possible clusters so i want to determine which hosts are cluster ? We have suse systems so i figured out on one server it shows this output does that mean is this a cluster ?

#-> find / -name hacluster
#-> find / -name cluster
#-> clustat
-bash: clustat: command not found
#-> hastatus -sum
-bash: hastatus: command not found
from the above output i see this host doesn't have veritas cluster but there is some hacluster when i tried to look for cluster.conf file i dont see and i am not aware for this hacluster.

If you know anything about this please let me know this would be very helpful.


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