Hello, I'm trying to guarantee that all my cloned drbd resources start on the same node and I can't figure out the syntax of the constraint to do it.
I could nominate one of the drbd resources as a "leader" and have all the others follow it. But then if something happens to that leader the others are without constraint. I tried adding them to a group but got a syntax error from pcs saying that I wasn't allowed to add cloned resources to a group. If anyone is interested, it started from this example: https://edmondcck.medium.com/setup-a-highly-available-nfs-cluster-with-disk-encryption-using-luks-drbd-corosync-and-pacemaker-a96a5bdffcf8 There's a DRBD partition that gets mounted onto a local directory. The local directory is then mounted onto an exported directory (mount --bind). Then the nfs service (samba too) get started and finally the VIP. Please note that while I have 3 DRBD resources currently, that number may increase after the initial configuration is performed. I would just like to know a mechanism to make sure all the DRBD resources are colocated. Any suggestions welcome. [root@nas00 ansible]# pcs resource * Clone Set: drbdShare-clone [drbdShare] (promotable): * Masters: [ nas00 ] * Slaves: [ nas01 ] * Clone Set: drbdShareRead-clone [drbdShareRead] (promotable): * Masters: [ nas00 ] * Slaves: [ nas01 ] * Clone Set: drbdShareWrite-clone [drbdShareWrite] (promotable): * Masters: [ nas00 ] * Slaves: [ nas01 ] * localShare (ocf::heartbeat:Filesystem): Started nas00 * localShareRead (ocf::heartbeat:Filesystem): Started nas00 * localShareWrite (ocf::heartbeat:Filesystem): Started nas00 * nfsShare (ocf::heartbeat:Filesystem): Started nas00 * nfsShareRead (ocf::heartbeat:Filesystem): Started nas00 * nfsShareWrite (ocf::heartbeat:Filesystem): Started nas00 * nfsService (systemd:nfs-server): Started nas00 * smbService (systemd:smb): Started nas00 * vipN (ocf::heartbeat:IPaddr2): Started nas00 [root@nas00 ansible]# pcs constraint show --all Location Constraints: Ordering Constraints: promote drbdShare-clone then start localShare (kind:Mandatory) promote drbdShareRead-clone then start localShareRead (kind:Mandatory) promote drbdShareWrite-clone then start localShareWrite (kind:Mandatory) start localShare then start nfsShare (kind:Mandatory) start localShareRead then start nfsShareRead (kind:Mandatory) start localShareWrite then start nfsShareWrite (kind:Mandatory) start nfsShare then start nfsService (kind:Mandatory) start nfsShareRead then start nfsService (kind:Mandatory) start nfsShareWrite then start nfsService (kind:Mandatory) start nfsService then start smbService (kind:Mandatory) start nfsService then start vipN (kind:Mandatory) Colocation Constraints: localShare with drbdShare-clone (score:INFINITY) (with-rsc-role:Master) localShareRead with drbdShareRead-clone (score:INFINITY) (with-rsc-role:Master) localShareWrite with drbdShareWrite-clone (score:INFINITY) (with-rsc-role:Master) nfsShare with localShare (score:INFINITY) nfsShareRead with localShareRead (score:INFINITY) nfsShareWrite with localShareWrite (score:INFINITY) nfsService with nfsShare (score:INFINITY) nfsService with nfsShareRead (score:INFINITY) nfsService with nfsShareWrite (score:INFINITY) smbService with nfsShare (score:INFINITY) smbService with nfsShareRead (score:INFINITY) smbService with nfsShareWrite (score:INFINITY) vipN with nfsService (score:INFINITY) Ticket Constraints: Thank you for your time and attention. -John _______________________________________________ Manage your subscription: https://lists.clusterlabs.org/mailman/listinfo/users ClusterLabs home: https://www.clusterlabs.org/