On 26/04/2013, at 4:25 PM, Angel L. Mateo <ama...@um.es> wrote: > El 26/04/13 02:01, Andrew Beekhof escribió: >> >> On 24/04/2013, at 10:48 PM, Angel L. Mateo <ama...@um.es> wrote: >> >>> 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. >> >> If you want to use qdisk, then you need something newer than 1.1.8 (which >> did not know how to filter qdisk from the membership). >> > Oopps. I have cman 3.1.7, corosync 1.4.2 and pacemaker 1.1.6 (the ones > provided with ubuntu 12.04). > > My purpose for using qdisk is to solve split brain problem in my two > nodes cluster. Another suggestion for this?
Another node (with standby=true) might be an option. Or try and get a newer version. > >> >>> 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. >> >> Do both side claim to have quorum? >> Also, had you enabled fencing the cluster would have shot its peer before >> trying to start the IP. >> > I think I did (and this configuration with stonith disabled is because > modified for later tests) but I will check it again. > >>> >>> So it seems that node fencing configure at cluster.conf is not working >>> for me. >> >> Because pacemaker cannot use it from there. >> You need to follow >> >> >> http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html/Clusters_from_Scratch/_configuring_cman_fencing.html >> >> and then teach pacemaker about fence_scsi: >> >> >> http://clusterlabs.org/doc/en-US/Pacemaker/1.1-plugin/html/Clusters_from_Scratch/ch09.html >> >>> 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: >> >> See the above link to chapter 9. >> > I have tried this. The problem I'm having is that I don't know how to > create the resource using fence_scsi. I have tried different syntaxes > > crm(live)configure# primitive stonith_fence_scsi stonith:redhat/fence_scsi \ Remove the "redhat/" part. > > params name="scsi_fence" devices="/dev/sdc" > ERROR: stonith_fence_scsi: parameter name does not exist 'name' is the name of the machine to be shot and is filled in at runtime > ERROR: stonith_fence_scsi: parameter devices does not exist This looks like crmsh not knowing how to find the agent's metadata and can be ignored. "man fence_scsi" looks like you need a value for "key" though > > crm(live)configure# primitive stonith_fence_scsi stonith:redhat/fence_scsi \ > > params n="scsi_fence" d="/dev/sdc" > ERROR: stonith_fence_scsi: parameter d does not exist > ERROR: stonith_fence_scsi: parameter n does not exist > > crm(live)configure# primitive stonith_fence_scsi stonith:redhat/fence_scsi \ > > params -n="scsi_fence" -d="/dev/sdc" > ERROR: stonith_fence_scsi: parameter -d does not exist > ERROR: stonith_fence_scsi: parameter -n does not exist > > Does anyone has an example for this? What I would like to do is that in > case of problems, the node with the use of scsi channel (the one using my LMV > volumes) shoots the other one. Could I use the same behaviour with > external/sbd stonith resource? > > -- > 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 _______________________________________________ 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
