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--- linux:clvm [2015/10/30 09:47]
vondra [Installation (Debian Jessie)]
+++ linux:clvm [2015/11/06 16:02] (current)
vondra [Removing node from the cluster]
@@ Line 1: / Line 1: @@
 ====== Cluster LVM ======
+sources:
+[[https://www.suse.com/documentation/sle_ha/book_sleha/data/sec_ha_clvm_config.html]]
+[[https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Cluster_Administration/s1-admin-manage-nodes-delete-add-cli-CA.html]]
+[[https://www.ibm.com/developerworks/community/blogs/mhhaque/resource/RHCS_IBM_POWER.pdf?lang=zh]]
 ===== Installation (Debian Jessie) =====
   - install necessary packages:<code bash>
 apt-get install clvm cman</code>
-  - set locking-type in /etc/lvm/lmv.conf to 3
+  - edit /etc/lvm/lmv.conf, set:<code bash>
+mirror_logs_require_separate_pvs = 1
+locking_type = 3
+</code>
   - set no wait time for quorum:<code bash>echo "CMAN_QUORUM_TIMEOUT=0" >> /etc/default/cman</code>
   - create config file /etc/cluster/cluster.conf and put it to all nodes:<code xml>
-<cluster name="mycluster" config_version="2">
+<cluster name="mycluster" config_version="1">
    <clusternodes>
      <clusternode name="10.0.0.23" nodeid="1">
@@ Line 23: / Line 33: @@
 </cluster>
 </code>
-  - start cman service and clvm service:<code bash>
+  - start cman service and clvm service on all nodes:<code bash>
 service cman start
 service clvm start
@@ Line 34: / Line 44: @@
    M      8   2015-10-30 09:36:04  10.0.0.112
 </code>
+  - assuming that /dev/sdb and /dev/sdc are volumes exported from SANs
+  - create physical volumes:<code bash>
+pvcreate /dev/sdb
+pvcreate /dev/sdc</code>
+  - create clustered volume group:<code bash>
+vgcreate --clustered y guma_cerna /dev/sdb /dev/sdc</code>
+  - create mirrored lvm:<code bash>
+lvcreate -n testovaci_lv -m1 -L 1.0g guma_cerna --nosync</code>(--nosync means that data will not be synced upon creating - since the lv should not contain any data upon its creating its OK)
+  - (optional) check that the volume were created succesfully on both SANs:<code bash>
+lvs -a -o +devices</code>
+===== Adding/deleting node from cluster =====
+  - If deleting stop all cluster services on node e.g.:<code bash>
+service stop clvm
+service stop cman</code>
+  - install cman clvm on new node(s) - don't forget to setup the /etc/lvm/lvm.conf file
+  - attach SANs on new node(s)
+  - edit the /etc/cluster/cluster.conf and increase serial:<code xml>
+<cluster name="mycluster" config_version="2">
+   <clusternodes>
+     <clusternode name="10.0.0.23" nodeid="1">
+         <fence>
+         </fence>
+     </clusternode>
+     <clusternode name="10.0.0.112" nodeid="2">
+         <fence>
+         </fence>
+     </clusternode>
+     <clusternode name="10.0.0.110" nodeid="3">
+         <fence>
+         </fence>
+     </clusternode>
+  </clusternodes>
+   <fencedevices>
+   </fencedevices>
+   <rm>
+   </rm>
+</cluster></code>
+  - distribute the file to ALL nodes in cluster and issue following command from any node:<code bash>cman_tool version -r -S</code>
+  - to use previously created volumes those must be activated on new node:<code bash>
+lvchange -a y /dev/guma_cerna/testovaci_lv</code>
+===== Removing node from the cluster =====
+  - stop all cluster services and then stop cman service with parameter leave<code bash>
+service clvm stop
+service cman stop leave
+</code>

linux/clvm.1446194876.txt.gz · Last modified: 2015/10/30 09:47 by vondra