[ClusterLabs] DLM not working on my GFS2/pacemaker cluster

[emmanuel segura]

please share your cluster config and say if your fencing is working.

2016-01-19 3:47 GMT+01:00  <daniel at benoy.name>:
> One of my clusters is having a problem. It's no longer able to set up its
> GFS2 mounts. I've narrowed the problem down a bit. Here's the output when I
> try to start the DLM daemon (Normally this is something corosync/pacemaker
> starts up for me, but here it is on the command line for the debug output):
>   # dlm_controld -D -q 04561 dlm_controld 4.0.1 started
>   4561 our_nodeid 168528918
>   4561 found /dev/misc/dlm-control minor 56
>   4561 found /dev/misc/dlm-monitor minor 55
>   4561 found /dev/misc/dlm_plock minor 54
>   4561 /sys/kernel/config/dlm/cluster/comms: opendir failed: 2
>   4561 /sys/kernel/config/dlm/cluster/spaces: opendir failed: 2
>   4561 cmap totem.rrp_mode = 'none'
>   4561 set protocol 0
>   4561 set recover_callbacks 1
>   4561 cmap totem.cluster_name = 'cwwba'
>   4561 set cluster_name cwwba
>   4561 /dev/misc/dlm-monitor fd 11
>   4561 cluster quorum 1 seq 672 nodes 2
>   4561 cluster node 168528918 added seq 672
>   4561 set_configfs_node 168528918 10.11.140.22 local 1
>   4561 /sys/kernel/config/dlm/cluster/comms/168528918/addr: open failed: 1
>   4561 cluster node 168528919 added seq 672
>   4561 set_configfs_node 168528919 10.11.140.23 local 0
>   4561 /sys/kernel/config/dlm/cluster/comms/168528919/addr: open failed: 1
>   4561 cpg_join dlm:controld ...
>   4561 setup_cpg_daemon 13
>   4561 dlm:controld conf 1 1 0 memb 168528918 join 168528918 left
>   4561 daemon joined 168528918
>   4561 fence work wait for cluster ringid
>   4561 dlm:controld ring 168528918:672 2 memb 168528918 168528919
>   4561 fence_in_progress_unknown 0 startup
>   4561 receive_protocol 168528918 max 3.1.1.0 run 0.0.0.0
>   4561 daemon node 168528918 prot max 0.0.0.0 run 0.0.0.0
>   4561 daemon node 168528918 save max 3.1.1.0 run 0.0.0.0
>   4561 set_protocol member_count 1 propose daemon 3.1.1 kernel 1.1.1
>   4561 receive_protocol 168528918 max 3.1.1.0 run 3.1.1.0
>   4561 daemon node 168528918 prot max 3.1.1.0 run 0.0.0.0
>   4561 daemon node 168528918 save max 3.1.1.0 run 3.1.1.0
>   4561 run protocol from nodeid 168528918
>   4561 daemon run 3.1.1 max 3.1.1 kernel run 1.1.1 max 1.1.1
>   4561 plocks 14
>   4561 receive_protocol 168528918 max 3.1.1.0 run 3.1.1.0
>
> As you can see, it's trying to configure the node addresses, but it's unable
> to write to the 'addr' file under the /sys/kernel/config configfs tree (See
> the 'open failed' lines above). I have no idea why. dmesg isn't saying
> anything. Nothing is telling me why it doesn't want me writing there. And I
> can confirm this behavior on the prompt as well.
>
> Trying to start CLVM results in complaints about the node not having an
> address set, which makes sense given the
>
> Here's the exact same command run twice. First, on a very similarly
> configured cluster (which is currently running):
>   # cat /sys/kernel/config/dlm/cluster/comms/169446438/addrcat
>   cat: /sys/kernel/config/dlm/cluster/comms/169446438/addr: Permission
> denied
> (That's what I expect to see. It's a write-only file.)
>
> And now on this messed up cluster:
>   # cat /sys/kernel/config/dlm/cluster/comms/168528918/addr
>   cat: /sys/kernel/config/dlm/cluster/comms/168528918/addr: Operation not
> permitted
>
> Why 'operation not permitted'? dmesg isn't telling me anything at all, and I
> don't see any way to get the kernel to spit out some kind of explanation for
> why it's blocking me. Can anyone help? At least point me in a direction
> where I can get the system to give me some indication why it's behaving this
> way?
>
> I'm running Ubuntu 14.04, and I've posted this on the Ubuntu forums as well:
> http://ubuntuforums.org/showthread.php?t=2310383
>
>
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