Is there a detailed explanation for resource monitor and start timeouts and intervals with examples, for dummies?
my resource configured s follows: [root@lustre-mds1 ~]# pcs resource show MDT00 Warning: This command is deprecated and will be removed. Please use 'pcs resource config' instead. Resource: MDT00 (class=ocf provider=heartbeat type=Filesystem) Attributes: MDT00-instance_attributes device=/dev/mapper/mds00 directory=/lustre/mds00 force_unmount=safe fstype=lustre Operations: monitor: MDT00-monitor-interval-20s interval=20s timeout=40s start: MDT00-start-interval-0s interval=0s timeout=60s stop: MDT00-stop-interval-0s interval=0s timeout=60s I issued manual failover with the following commands: crm_resource --move -r MDT00 -H lustre-mds1 resource tried but returned back with the entries in pacemaker.log like these: Dec 12 15:53:23 Filesystem(MDT00)[1886100]: INFO: Running start for /dev/mapper/mds00 on /lustre/mds00 Dec 12 15:53:45 Filesystem(MDT00)[1886100]: ERROR: Couldn't mount device [/dev/mapper/mds00] as /lustre/mds00 tried again with the same result: Dec 12 16:11:04 Filesystem(MDT00)[1891333]: INFO: Running start for /dev/mapper/mds00 on /lustre/mds00 Dec 12 16:11:26 Filesystem(MDT00)[1891333]: ERROR: Couldn't mount device [/dev/mapper/mds00] as /lustre/mds00 Why it cannot move? Does this 20 sec interval (between start and error) have anything to do with monitor interval settings? [root@lustre-mgs ~]# pcs constraint show --full Location Constraints: Resource: MDT00 Enabled on: Node: lustre-mds1 (score:100) (id:location-MDT00-lustre-mds1-100) Node: lustre-mds2 (score:100) (id:location-MDT00-lustre-mds2-100) Disabled on: Node: lustre-mgs (score:-INFINITY) (id:location-MDT00-lustre-mgs--INFINITY) Node: lustre1 (score:-INFINITY) (id:location-MDT00-lustre1--INFINITY) Node: lustre2 (score:-INFINITY) (id:location-MDT00-lustre2--INFINITY) Node: lustre3 (score:-INFINITY) (id:location-MDT00-lustre3--INFINITY) Node: lustre4 (score:-INFINITY) (id:location-MDT00-lustre4--INFINITY) Ordering Constraints: start MGT then start MDT00 (kind:Optional) (id:order-MGT-MDT00-Optional) start MDT00 then start OST1 (kind:Optional) (id:order-MDT00-OST1-Optional) start MDT00 then start OST2 (kind:Optional) (id:order-MDT00-OST2-Optional) with regards to ordering constraint: OST1 and OST2 are started now, while I'm exercising MDT00 failover.
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