Thank for the link emmanuel, it seems to be a solution for my problem, i will test it!
2012/6/26 emmanuel segura <emi2f...@gmail.com> > Look here > http://www.clusterlabs.org/doc/en-US/Pacemaker/1.1/html/Pacemaker_Explained/ch09s03s03.html > > :-) > > 2012/6/26 coma <coma....@gmail.com> > >> Hello, >> >> i running on a 2 node cluster with corosync & drbd in active/passive mode >> for mysql hight availablity. >> >> The cluster working fine (failover/failback & replication ok), i have no >> network outage (network is monitored and i've not seen any failure) but >> split-brain occurs very often and i don't anderstand why, maybe you can >> help me? >> >> I'm new pacemaker/corosync/DRBD user, so my cluster and drbd >> configuration are probably not optimal, so if you have any comments, tips >> or examples I would be very grateful! >> >> Here is an exemple of corosync log when a split-brain occurs (1 hour log >> to see before/after split-brain): >> >> http://pastebin.com/3DprkcTA >> >> Thank you in advance for any help! >> >> >> More details about my configuration: >> >> I have: >> One prefered "master" node (node1) on a virtual server, and one "slave" >> node on a physical server. >> On each server, >> eth0 is connected on my main LAN for client/server communication (with >> cluster VIP) >> Eth1 is connected on a dedicated Vlan for corosync communication >> (network: 192.168.3.0 /30) >> Eth2 is connected on a dedicated Vlan for drbd replication (network: >> 192.168.2.0/30) >> >> Here is my drbd configuration: >> >> >> resource drbd-mysql { >> protocol C; >> disk { >> on-io-error detach; >> } >> handlers { >> fence-peer "/usr/lib/drbd/crm-fence-peer.sh"; >> after-resync-target "/usr/lib/drbd/crm-unfence-peer.sh"; >> split-brain "/usr/lib/drbd/notify-split-brain.sh root"; >> } >> net { >> cram-hmac-alg sha1; >> shared-secret "secret"; >> after-sb-0pri discard-younger-primary; >> after-sb-1pri discard-secondary; >> after-sb-2pri call-pri-lost-after-sb; >> } >> startup { >> wfc-timeout 1; >> degr-wfc-timeout 1; >> } >> on node1{ >> device /dev/drbd1; >> address 192.168.2.1:7801; >> disk /dev/sdb; >> meta-disk internal; >> } >> on node2 { >> device /dev/drbd1; >> address 192.168.2.2:7801; >> disk /dev/sdb; >> meta-disk internal; >> } >> } >> >> >> Here my cluster config: >> >> node node1 \ >> attributes standby="off" >> node node2 \ >> attributes standby="off" >> primitive Cluster-VIP ocf:heartbeat:IPaddr2 \ >> params ip="10.1.0.130" broadcast="10.1.7.255" nic="eth0" >> cidr_netmask="21" iflabel="VIP1" \ >> op monitor interval="10s" timeout="20s" \ >> meta is-managed="true" >> primitive cluster_status_page ocf:heartbeat:ClusterMon \ >> params pidfile="/var/run/crm_mon.pid" >> htmlfile="/var/www/html/cluster_status.html" \ >> op monitor interval="4s" timeout="20s" >> primitive datavg ocf:heartbeat:LVM \ >> params volgrpname="datavg" exclusive="true" \ >> op start interval="0" timeout="30" \ >> op stop interval="0" timeout="30" >> primitive drbd_mysql ocf:linbit:drbd \ >> params drbd_resource="drbd-mysql" \ >> op monitor interval="15s" >> primitive fs_mysql ocf:heartbeat:Filesystem \ >> params device="/dev/datavg/data" directory="/data" fstype="ext4" >> primitive mail_alert ocf:heartbeat:MailTo \ >> params email="myem...@test.com" \ >> op monitor interval="10" timeout="10" depth="0" >> primitive mysqld ocf:heartbeat:mysql \ >> params binary="/usr/bin/mysqld_safe" config="/etc/my.cnf" >> datadir="/data/mysql/databases" user="mysql" >> pid="/var/run/mysqld/mysqld.pid" socket="/var/lib/mysql/mysql.sock" >> test_passwd="cluster_test" test_table="Cluster_Test.dbcheck" >> test_user="cluster_test" \ >> op start interval="0" timeout="120" \ >> op stop interval="0" timeout="120" \ >> op monitor interval="30s" timeout="30s" OCF_CHECK_LEVEL="1" >> target-role="Started" >> group mysql datavg fs_mysql Cluster-VIP mysqld cluster_status_page >> mail_alert >> ms ms_drbd_mysql drbd_mysql \ >> meta master-max="1" master-node-max="1" clone-max="2" >> clone-node-max="1" notify="true" >> location mysql-preferred-node mysql inf: node1 >> colocation mysql_on_drbd inf: mysql ms_drbd_mysql:Master >> order mysql_after_drbd inf: ms_drbd_mysql:promote mysql:start >> property $id="cib-bootstrap-options" \ >> dc-version="1.1.6-3.el6-a02c0f19a00c1eb2527ad38f146ebc0834814558" >> \ >> cluster-infrastructure="openais" \ >> expected-quorum-votes="2" \ >> stonith-enabled="false" \ >> no-quorum-policy="ignore" \ >> last-lrm-refresh="1340701656" >> rsc_defaults $id="rsc-options" \ >> resource-stickiness="100" \ >> migration-threshold="2" \ >> failure-timeout="30s" >> >> _______________________________________________ >> Pacemaker mailing list: Pacemaker@oss.clusterlabs.org >> http://oss.clusterlabs.org/mailman/listinfo/pacemaker >> >> Project Home: http://www.clusterlabs.org >> Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf >> Bugs: http://bugs.clusterlabs.org >> >> > > > -- > esta es mi vida e me la vivo hasta que dios quiera > > _______________________________________________ > Pacemaker mailing list: Pacemaker@oss.clusterlabs.org > http://oss.clusterlabs.org/mailman/listinfo/pacemaker > > Project Home: http://www.clusterlabs.org > Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf > Bugs: http://bugs.clusterlabs.org > >
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