Technically, yes. Practically, no. You need to know if your configuration is working. The best way to do that is to simulate a failure and watch to make sure that the fence actions happen. I would strongly recommend scheduling down time to do this. digimer On 01/07/2013 02:55 AM, Rainer Schubert wrote: > Hi, > > thank you for the fast answer. Now I have one question: > > - It is possible to integrate the fencing-service on a working cluster? > > I have working virtualisation enviroment with 50 VMs, so i can't take > them down. > > best regards > > > > 2013/1/4 Digimer <lists@xxxxxxxxxx>: >> As Emmanuel said, you need fencing. >> >> Please read this: >> >> https://alteeve.ca/w/2-Node_Red_Hat_KVM_Cluster_Tutorial#Concept.3B_Fencing >> >> digimer >> >> On 01/04/2013 02:26 AM, Rainer Schubert wrote: >>> Hi, >>> >>> my cluster.conf: >>> >>> <?xml version="1.0"?> >>> <cluster name="my_lvm_cluster" config_version="2"> >>> <clusternodes> >>> <clusternode name="mynode1" nodeid="1"> >>> </clusternode> >>> >>> <clusternode name="mynode2" nodeid="2"> >>> </clusternode> >>> <clusternode name="mynode3" nodeid="3"> >>> </clusternode> >>> <clusternode name="mynode4" nodeid="4"> >>> </clusternode> >>> </clusternodes> >>> </cluster> >>> >>> 2013/1/3 Digimer <lists@xxxxxxxxxx>: >>>> On 01/03/2013 08:21 AM, Rainer Schubert wrote: >>>>> Hi, >>>>> >>>>> I have created a small CMAN-Cluster with 3 Nodes and a CLVM >>>>> configuration. Now, I want to add a new node (mynode4). CMAN works >>>>> fine, cman_tool shows all members: >>>>> >>>>> # cman_tool nodes >>>>> Node Sts Inc Joined Name >>>>> 1 M 408 2013-01-03 14:00:57 mynode1 >>>>> 2 M 408 2013-01-03 14:00:57 mynode2 >>>>> 3 M 408 2013-01-03 14:00:57 mynode3 >>>>> 4 M 404 2013-01-03 14:00:56 mynode4 >>>>> >>>>> >>>>> cman_tool services (on mynode4) >>>>> >>>>> fence domain >>>>> member count 4 >>>>> victim count 0 >>>>> victim now 0 >>>>> master nodeid 1 >>>>> wait state none >>>>> members 1 2 3 4 >>>>> >>>>> >>>>> corosync: >>>>> >>>>> corosync-cfgtool -s >>>>> Printing ring status. >>>>> Local node ID 4 >>>>> RING ID 0 >>>>> id = 10.10.10.13 >>>>> status = ring 0 active with no faults >>>>> >>>>> Everything looks fine, from my site. No I will start clvmd >>>>> >>>>> :~# /etc/init.d/clvm start >>>>> Starting Cluster LVM Daemon: clvm clvmd startup timed out >>>>> >>>>> The CLVM runs into a time out. >>>>> >>>>> My System: >>>>> >>>>> cat /etc/debian_version >>>>> 6.0.6 >>>>> >>>>> # lvm version >>>>> LVM version: 2.02.66(2) (2010-05-20) >>>>> Library version: 1.02.48 (2010-05-20) >>>>> Driver version: 4.22.0 >>>>> >>>>> dpkg -l |grep clvm >>>>> ii clvm 2.02.66-5 >>>>> Cluster LVM Daemon for lvm2 >>>>> >>>>> dpkg -l |grep cman >>>>> ii cman 3.0.12-2 >>>>> Red Hat cluster suite - cluster manager >>>>> ii libcman3 3.0.12-2 >>>>> Red Hat cluster suite - cluster manager libraries >>>>> >>>>> Have anybody a idea, what running false? >>>>> >>>>> best regards >>>>> >>>> >>>> Can you post your cluster.conf please? Obfuscate as little as you can >>>> please. >>>> >>>> -- >>>> Digimer >>>> Papers and Projects: https://alteeve.ca/w/ >>>> What if the cure for cancer is trapped in the mind of a person without >>>> access to education? >> >> >> -- >> Digimer >> Papers and Projects: https://alteeve.ca/w/ >> What if the cure for cancer is trapped in the mind of a person without >> access to education? -- Digimer Papers and Projects: https://alteeve.ca/w/ What if the cure for cancer is trapped in the mind of a person without access to education? -- Linux-cluster mailing list Linux-cluster@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/linux-cluster
