Hi Rafael, 2009/10/19 Rafael Micó Miranda <rmicmirregs@xxxxxxxxx>: > Hi all, > > I've been requested to design a solution for a 2 node, active-passive, > cluster of Maven (http://maven.apache.org/) > > The cluster will be formed by: > > - 2 front-end nodes in which the Maven service will be run, in an > active-passive configuration (active-backup) > - I will use HP-ilo fencing devices as the nodes are HP servers > - a NFS mountpoint in which Maven can storage its files, served by a NAS > cluster > - a SQL database > > The need of an active-passive configuration is because, as I've been > told, the front-end nodes cannot run Maven at the same time because it > will cause database corruption. > > I'm accustomed to clusters in which nodes share a shared storage node, > so i could use a Qdisk daemon in a 2 node cluster in addition to fencing > to keep cluster quorate. This is not the situation as i will not have > available a shared storage device, and this will be the first cluster > using CMAN to be used in the company (i built the older ones with > Linux-HA). > > I have some doubts about the better way to achieve this configuration, > and I will like to share it with you and get your recommendations: > > 1.- "Scrip resource": as official RHEL 5.4 documentation says: "The > script resource allows a standard LSB-compliant init script to be used > to start a clustered service." > > I'm used to LSB scripts as part of the Linux-HA project: > http://www.linux-ha.org/LSBResourceAgent > > Is there any further information of the LSB compliance for resource > scripts in RHEL ? > Try this link (that you may already know !) http://sources.redhat.com/cluster/wiki/RGManager > > 2.- Service operational status: does rgmanager implement any way to > check the status of the "script" resources? If so, will the "script" > resource need an "status|monitor" method? How often will rgmanager check > the status of the resource? > This is in the your script resource metadata, under the <action/> section, you can define the interval at which rgmanager will launch the "status|monitor" action. It will have to return 0 if everythng is fine. (this is the LSB compliance thing) > > 3.- NFS resource operational status: same as above: does rgmanager > implement any way to check the status of the "nfs mountpoint" resources? > How often will rgmanager check the status of the resource? > same as above, check the interval metadata settings > > 4.- Qdisk: As far as i know, i will not be able to use Qdisk here. I > plan to use the 2 node cluster configuration: > > <cman expected_votes="1" two_node="1"/> > > Is there any other consideration to take into account to keep the > cluster quorate? > http://sources.redhat.com/cluster/wiki/FAQ/CMAN#two_node_dual may give you additionnal information > > > Any help/recommendations will be appreciated. > > Cheers, > > Rafael > > -- > Rafael Micó Miranda > > -- > Linux-cluster mailing list > Linux-cluster@xxxxxxxxxx > https://www.redhat.com/mailman/listinfo/linux-cluster > -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
