Andrea <a.bacchi@...> writes: > > Michael Schwartzkopff <ms <at> ...> writes: > > > > > Am Donnerstag, 22. Januar 2015, 10:03:38 schrieb E. Kuemmerle: > > > On 21.01.2015 11:18 Digimer wrote: > > > > On 21/01/15 08:13 AM, Andrea wrote: > > > >> > Hi All, > > > >> > > > > >> > I have a question about stonith > > > >> > In my scenarion , I have to create 2 node cluster, but I don't > > > > Are you sure that you do not have fencing hardware? Perhaps you just did nit > > configure it? Please read the manual of you BIOS and check your system > board if > > you have a IPMI interface. > > > > > > >> > In my test, when I simulate network failure, split brain occurs, and > > > >> > when > > > >> > network come back, One node kill the other node > > > >> > -log on node 1: > > > >> > Jan 21 11:45:28 corosync [CMAN ] memb: Sending KILL to node 2 > > > >> > > > > >> > -log on node 2: > > > >> > Jan 21 11:45:28 corosync [CMAN ] memb: got KILL for node 2 > > > > That is how fencing works. > > > > Mit freundlichen Grüßen, > > > > Michael Schwartzkopff > > > > Hi All > > many thanks for your replies. > I will update my scenario to ask about adding some devices for stonith > - Option 1 > I will ask for having 2 vmware virtual machine, so i can try fance_vmware > -Option 2 > In the project, maybe will need a shared storage. In this case, the shared > storage will be a NAS that a can add to my nodes via iscsi. In this case I > can try fence_scsi > > I will write here about news > > Many thanks to all for support > Andrea >
some news - Option 2 In the customer environment I configured a iscsi target that our project will use as cluster filesystem [ONE]pvcreate /dev/sdb [ONE]vgcreate -Ay -cy cluster_vg /dev/sdb [ONE]lvcreate -L*G -n cluster_lv cluster_vg [ONE]mkfs.gfs2 -j2 -p lock_dlm -t ProjectHA:ArchiveFS /dev/cluster_vg/cluster_lv now I can add a Filesystem resource [ONE]pcs resource create clusterfs Filesystem device="/dev/cluster_vg/cluster_lv" directory="/var/mountpoint" fstype="gfs2" "options=noatime" op monitor interval=10s clone interleave=true and I can read and write from both node. Now I'd like to use this device with fence_scsi. It is ok? because I see in the man page this: "The fence_scsi agent works by having each node in the cluster register a unique key with the SCSI devive(s). Once registered, a single node will become the reservation holder by creating a "write exclu-sive, registrants only" reservation on the device(s). The result is that only registered nodes may write to the device(s)" It's no good for me, I need both node can write on the device. So, I need another device to use with fence_scsi? In this case I will try to create two partition, sdb1 and sdb2, on this device and use sdb1 as clusterfs and sdb2 for fencing. If i try to manually test this, I obtain before any operation [ONE]sg_persist -n --read-keys --device=/dev/disk/by-id/scsi-36e843b608e55bb8d6d72d43bfdbc47d4 PR generation=0x27, 1 registered reservation key follows: 0x98343e580002734d Then, I try to set serverHA1 key [serverHA1]fence_scsi -d /dev/disk/by-id/scsi-36e843b608e55bb8d6d72d43bfdbc47d4 -f /tmp/miolog.txt -n serverHA1 -o on But nothing has changed [ONE]sg_persist -n --read-keys --device=/dev/disk/by-id/scsi-36e843b608e55bb8d6d72d43bfdbc47d4 PR generation=0x27, 1 registered reservation key follows: 0x98343e580002734d and in the log: gen 26 17:53:27 fence_scsi: [debug] main::do_register_ignore (node_key=4d5a0001, dev=/dev/sde) gen 26 17:53:27 fence_scsi: [debug] main::do_reset (dev=/dev/sde, status=6) gen 26 17:53:27 fence_scsi: [debug] main::do_register_ignore (err=0) The same when i try on serverHA2 It is normal? In any case, i try to create a stonith device [ONE]pcs stonith create iscsi-stonith-device fence_scsi pcmk_host_list="serverHA1 serverHA2" devices=/dev/disk/by-id/scsi-36e843b608e55bb8d6d72d43bfdbc47d4 meta provides=unfencing and the cluster status is ok [ONE] pcs status Cluster name: MyCluHA Last updated: Tue Jan 27 11:21:48 2015 Last change: Tue Jan 27 10:46:57 2015 Stack: cman Current DC: serverHA1 - partition with quorum Version: 1.1.11-97629de 2 Nodes configured 5 Resources configured Online: [ serverHA1 serverHA2 ] Full list of resources: Clone Set: ping-clone [ping] Started: [ serverHA1 serverHA2 ] Clone Set: clusterfs-clone [clusterfs] Started: [ serverHA1 serverHA2 ] iscsi-stonith-device (stonith:fence_scsi): Started serverHA1 How I can try this from remote connection? Andrea _______________________________________________ Pacemaker mailing list: Pacemaker@oss.clusterlabs.org http://oss.clusterlabs.org/mailman/listinfo/pacemaker Project Home: http://www.clusterlabs.org Getting started: http://www.clusterlabs.org/doc/Cluster_from_Scratch.pdf Bugs: http://bugs.clusterlabs.org