[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

Re: [Linux-cluster] porblem with quorum at cluster boot

in 2-node cluster you don't need a quorum disk , there is a 2-node cluster option that will added to the cluster.conf , and the cluster will be functional quorate and everything , think of it  if you have 2 nodes only .

regarding your problem , is the problem occuring on a specific node , or on both , if on a specific node , then check connectivity with shared disk , also how are you shutting down the cluster ( hard shutdown? ) , simultaneously or at the same time, .... it all maters ?? also check the fencing devices is the fencing occurring correctly ( did you tried to unplug network cables from one node and observed behavior )???? many parameters to check , my recommendation is to troubleshoot step by step starting with the basics ( hardware .. ) and on the way up .  

On Fri, Sep 24, 2010 at 7:38 PM, emilio brambilla <emilio inet it> wrote:

I have a 2 node cluster with qdisk quorum partition;

each node has 1 vote and the qdisk has 1 vote too; in cluster.conf I have this explicit declaration:
<cman expected_votes="3" two_node="0"\>

when I have both 2 nodes active cman_tool status tell me this:

Version: 6.1.0
Nodes: 2
Expected votes: 3
Quorum device votes: 1
Total votes: 3
Node votes: 1
Quorum: 2

then, if I power off a node these value, as expected, changed this way:
Nodes: 1
Total votes: 2

and the cluster is still quorate and functional.

the problem is if I power off both the node and them power on only one of them: in this case the single node does not quorate and the cluster does not start: I have to power on both the node to have the cluster (and services on the cluster) working.

I'd like the cluster can work (and boot) even with a single node (ie, if one of the node has hw failure and is down I still want to be able to reboot the working node and have it booting correctly the cluster)

any hints? (thank's for reading all this)


Linux-cluster mailing list
Linux-cluster redhat com

[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]