On 12/30/2009 10:04 AM, f...@fredleroy.com wrote: > Hi all, > > I'm a real newbie to pacemaker and after quite a few reading, I believe my > setup would be the following : > - 2 node cluster active/passive > - using debian lenny, 1 nic per node, hard raid1 on each node > - plan to use the corosync/pacemaker package > - each node will host drdb (protocol c), ip, apache and mysql services > - drdb will be used for apache and mysql conf and data files > - will group ip, apache and mysql > - will use ms for drdb > - drdb will be using internal meta data > - group of services will be collocated on drdb master > - order group after drdb master. > > Is this a workable setup ?
we're basically doing the same for a couple of customers. with either 1 or more different drbd devices (for each service). e.g. example crm status output: > Master/Slave Set: ms_drbd_data > Masters: [ node1 ] > Slaves: [ node2 ] > Resource Group: group_data > fs_data (ocf::heartbeat:Filesystem): Started node1 > Resource Group: group_webservice > wwwip (ocf::heartbeat:IPaddr2): Started node1 > apache2 (ocf::heartbeat:apache): Started node1 > Resource Group: group_mysql > intip_sql (ocf::heartbeat:IPaddr2): Started node1 > mysql-server (ocf::heartbeat:mysql): Started node1 > stonith_rackpdu_node1 (stonith:external/rackpdu): Started node2 > stonith_rackpdu_node2 (stonith:external/rackpdu): Started node1 however, i'm still on some old, testing debian packages: * pacmemaker 1.0.4-2ec1d189f9c23093bf9239a980534b661baf782d with * openais-legacy 0.80.5+svn20090606-1~bpo50+1 thus i cannot directly comment on corosync/pacemaker. > I'm a bit worried about performance issues regarding disk latency, > especially with one nic (lan is gigabit). we have 2 nics per server. 1 for external services and 1 with a cross over cable for fast drbd replication. drbd tuning might be an important issue for you. > Also I would like to monitor operations of all services in the group (ip, > apache and mysql) and drdb so if one fails a switch of node is performed. > I did not understand if this was feasible with lsb (mysqld, for all the > other services i'll try to use the ofc) ? afairc the lsb complient scripts use the "/etc/init.d/lsb-script status" command to monitor the resource. but for each service you mentioned (mysql, apache, ip, drbd) there is a corresponding ocf compliant resource agent. cheers, raoul -- ____________________________________________________________________ DI (FH) Raoul Bhatia M.Sc. email. r.bha...@ipax.at Technischer Leiter IPAX - Aloy Bhatia Hava OEG web. http://www.ipax.at Barawitzkagasse 10/2/2/11 email. off...@ipax.at 1190 Wien tel. +43 1 3670030 FN 277995t HG Wien fax. +43 1 3670030 15 ____________________________________________________________________ _______________________________________________ Pacemaker mailing list Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker
