Hello guys: I've been recently reading "Pacemaker - Clusters from scratch" and working on a CentOS 7 system with pacemaker 1.1.13, corosync-2.3.4 and drbd84-utils-8.9.5.
The PDF instructs how to create a DRBD resource that seems to be automatically started due to a symmetric-cluster setup. However I want to setup an asymmetric-cluster/opt-in (symmetric-cluster=false) but I don't know how to configure a constraint to prefer node1 over node2 to start my DRBD resource as Master (Primary). So far this are my resources and constraints: [root@nodo1 ~]# pcs resource IPService (ocf::heartbeat:IPaddr2): Started nodo1 Web (systemd:httpd): Started nodo1 Master/Slave Set: clusterdataClone [clusterdata] Stopped: [ nodo1 nodo2 ] [root@nodo1 ~]# pcs constraint Location Constraints: Resource: IPService Enabled on: nodo2 (score:50) Enabled on: nodo1 (score:100) Resource: Web Enabled on: nodo2 (score:50) Enabled on: nodo1 (score:100) Ordering Constraints: start IPService then start Web (kind:Mandatory) Colocation Constraints: Web with IPService (score:INFINITY) My current DRBD status: [root@nodo1 ~]# drbdadm role clusterdb 0: Failure: (127) Device minor not allocated additional info from kernel: unknown minor Command 'drbdsetup-84 role 0' terminated with exit code 10 [root@nodo2 ~]# drbdadm role clusterdb 0: Failure: (127) Device minor not allocated additional info from kernel: unknown minor Command 'drbdsetup-84 role 0' terminated with exit code 10 I know that it's possible to configure my cluster as asymmetric and use constraints to avoid a resource running (or becoming master) on certain nodes, but this time I would like to learn how to do it with an opt-in scenario. Thanks in advance for your help. P.D. nodo1 & nodo2 are spanish names for node1 and node2 _______________________________________________ Users mailing list: Users@clusterlabs.org http://clusterlabs.org/mailman/listinfo/users Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org