Monitoring with Pacemaker

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1、MonitoringwithPacemakerMartinG.LoschwitzWho?GeneralDisclaimerWhatIamnotsaying...PacemakerdoesNOTreplacemonitoringWTF?Theonlythingbetterthanmonitoring......ismoarmonitoring!PMdoesnotreplacemonitoring......butitaddsanotherlayertoit.Now,imagineatypical2-nodeclusterDRBDDRBD,theDRBDlogoan

2、dLINBITareregisteredtrademarksofLINBITInformationTechnologiesGmbH.hastexoisnotaffiliatedwiththetrademarkowner.DRBDDRBD,theDRBDlogoandLINBITareregisteredtrademarksofLINBITInformationTechnologiesGmbH.hastexoisnotaffiliatedwiththetrademarkowner.AndassumethatMySQLcrashesIcingawillnotice.

3、Somewhen.Somebodywillbealarmed.Andfixtheproblemsoon.Hopefully.5minutesofdowntimeAnavailabilityof99,997%equalsto...15minutesofdowntimeAppliestoothersoftware,tooDelayisbadCanweautomatizethis?Yeswecan!Nagios/Icingahooks?Better:Pacemaker!Pacemakercan......restartfailedresources...movefai

4、ledresources...stopfailedresources...killnodesactingupSoundsgood,eh?„SoyouwantPacemakermonitoring“UsePacemaker19991999HB119992005HB1HB2199920052009HB1HB2PM199920052009HB1HB2PM199920052009HB1HB2PM199920052009HB1HB2PMMonitoringinPacemakerNodemonitoring„Fail-Over“NodehealthflagsNodeheal

5、thflagsnodealicenodebobpropertyno-quorum-policy="ignore"stonith-enabled="false"ode-health-strategy="migrate-on-red”Nodehealthflagsnodealicenodebobpropertyno-quorum-policy="ignore"stonith-enabled="false"ode-health-strategy="migrate-on-red”alice:~$crm_attribute--nodealice--name'#

6、health-temp’--update'red'--lifetimerebootHelpfulforSMARTcheckingHelpfulfortempcheckingHelpfulforfancheckingNodeBiasmigration-thresholdMySQLmigrationthresholdprimitivep_mysqlocf:heartbeat:mysql[…]metamigration-threshold=“3”migrationthresholdprimitivep_mysqlocf:heartbeat:mysql[…]meta

7、migration-threshold=“3”alice:~$crmresourcecleanupp_mysqlSTONITHDRBDDRBD,theDRBDlogoandLINBITareregisteredtrademarksofLINBITInformationTechnologiesGmbH.hastexoisnotaffiliatedwiththetrademarkowner.DRBDDRBD,theDRBDlogoandLINBITareregisteredtrademarksofLINBITInformationTechnologiesGmbH.h

8、astexoisnota