One service, two nodes, HA Post: 302580035

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Top Forums UNIX for Dummies Questions & Answers One service, two nodes, HA Post 302580035 by Flomaster on Wednesday 7th of December 2011 09:00:09 AM

12-07-2011

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One service, two nodes, HA

Hi all. I have two nodes taken different places. They are connected together on a network. So, i have a service, it works on one of nodes and when the node is unavailable the service should will be launched on other node.

Solution: rhel cluster, keepalive, hearbeat...may be Carp

but what if the channel in between nodes will break and servers remain to work...split brain?

And looking ahead may be will need to transfer service but with different addresses(same config but diff network ip)

If somebody worked with similar tasks prompt where to look please!! Smilie

Flomaster

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LEARN ABOUT CENTOS

quorum_overview

QUORUM_OVERVIEW(8)				    Corosync Cluster Engine Programmer's Manual 				QUORUM_OVERVIEW(8)

NAME

       quorum_overview - Quorum Library Overview

OVERVIEW

       The  quorum library is delivered with the corosync project. It is the external interface to the quorum service. This service is loaded into
       all nodes in a corosync cluster and track the quorum status of a node. In order for quorum service to be useful, a quorum provider must	be
       configured.

       The library provides a mechanism to:

       * Query the quorum status

       * Receive notifications of quorum state changes

BUGS

       No known bugs at the time of writing. The authors are from outerspace. Deal with it.

SEE ALSO

       corosync-quorumtool(8),	corosync.conf(5),  votequorum(5),  quorum_initialize(3),  quorum_finalize(3),  quorum_getquorate(3), quorum_track-
       start(3), quorum_trackstop(3), quorum_fd_get(3), quorum_dispatch(3), quorum_context_set(3), quorum_context_get(3)

corosync Man Page						    2012-02-09							QUORUM_OVERVIEW(8)