Hi Angel, two hints from my side. As you're working with ubuntu ask in this list which setup is or will be the best concerning corosync + pacemaker. I'm pretty sure (but I really don't know) that you'll get the advice to drop cman.
When you use cman + pacemaker than stonithing works as following. Use the pcmk-redirect in cman which causes that cman delegates stonith commands to pacemaker. In pacemaker you have to add the stonith agents which use your hardware. You have to enable stonithing in pacemaker with stonith-enabled="true". Another issue with stonithing. In a two node cluster you have to configure the stonith agents in a way that the remaining part (which ever it is, mostly the faster one) is able to shoot the other node even when cluster communication is lost. When the stonith action is done over the same wire as your cluster communication than stonithing is meaningless. Best regards Andreas Mock -----Ursprüngliche Nachricht----- Von: Angel L. Mateo [mailto:ama...@um.es] Gesendet: Mittwoch, 24. April 2013 14:49 An: The Pacemaker cluster resource manager Betreff: [Pacemaker] cman + corosync + pacemaker + fence_scsi Hello, I'm trying to configure a 2 node cluster in ubuntu with cman + corosync + pacemaker (the use of cman is because it is recommended at pacemaker quickstart). In order to solve the split brain in the 2 node cluster I'm using qdisk. For fencing, I'm trying to use fence_scsi and in this point I'm having the problem. I have attached my cluster.conf. xml <node id="/dev/block/8:33" type="normal" uname="/dev/block/8:33"/> node myotis51 node myotis52 primitive cluster_ip ocf:heartbeat:IPaddr2 \ params ip="155.54.211.167" \ op monitor interval="30s" property $id="cib-bootstrap-options" \ dc-version="1.1.6-9971ebba4494012a93c03b40a2c58ec0eb60f50c" \ cluster-infrastructure="cman" \ stonith-enabled="false" \ last-lrm-refresh="1366803979" At this moment I'm trying just with an IP resource, but at the end I'll get LVM resources and dovecot server running in top of them. The problem I have is that whenever I interrupt network traffic between my nodes (to check if quorum and fencing is working) the IP resource is started in both nodes of the cluster. So it seems that node fencing configure at cluster.conf is not working for me. Then I have tried to configure as a stonith resource (since it is listed by sudo crm ra list stonith), so I have tried to include primitive stonith_fence_scsi stonith:redhat/fence_scsi The problem I'm having with this is that I don't know how to indicate params for the resource (I have tried params devices="...", params -d ..., but they are not accepted) and with this (default) configuration I get: pr 24 14:39:14 myotis51 lrmd: [6759]: debug: on_msg_perform_op: add an operation operation monitor[5] on stonith_fence_scsi for client 6763, its parameters: crm_feature_set=[3.0.5] CRM_meta_timeout=[20000] to the operation list. Apr 24 14:39:14 myotis51 lrmd: [6759]: info: rsc:stonith_fence_scsi probe[5] (pid 10434) Apr 24 14:39:14 myotis51 lrmd: [10434]: ERROR: get_stonith_provider: No such device: redhat/fence_scsi Apr 24 14:39:14 myotis51 lrm-stonith: [10434]: ERROR: execra: No such legacy stonith device: redhat/fence_scsi Apr 24 14:39:14 myotis51 lrm-stonith: [10434]: debug: execra: stonith_fence_scsi_monitor returned -12 Apr 24 14:39:14 myotis51 lrmd: [6759]: WARN: Managed stonith_fence_scsi:monitor process 10434 exited with return code 7. Apr 24 14:39:14 myotis51 lrmd: [6759]: info: operation monitor[5] on stonith_fence_scsi for client 6763: pid 10434 exited with return code 7 Apr 24 14:39:14 myotis51 crmd: [6763]: debug: create_operation_update: do_update_resource: Updating resouce stonith_fence_scsi after complete monitor op (interval=0) Apr 24 14:39:14 myotis51 crmd: [6763]: info: process_lrm_event: LRM operation stonith_fence_scsi_monitor_0 (call=5, rc=7, cib-update=57, confirmed=true) not running I'm trying to use fence_scsi because I'm planning to use a shared storage (accesed via scsi fibre channel) and I don't want to use CLVM (because I need lvm snapshots, not supported by clvm), so I need a fencing device avoiding to concurrently use the same scsi devices in both nodes. Any idea on how to use fence_scsi? Or I could use any other fence/stonith device? Which one do you recommend? -- Angel L. Mateo Martínez Sección de Telemática Área de Tecnologías de la Información y las Comunicaciones Aplicadas (ATICA) http://www.um.es/atica Tfo: 868889150 Fax: 868888337 _______________________________________________ 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
