Pacemaker : Set LVM Shared Storage2021/06/11 |
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Configure Active/Passive HA-LVM (High Availability LVM) volume in Cluster.
This example is based on the environment like follows.
Before this setting, Configure basic settings of Cluster and set Fence device first.
+--------------------+
| [ ISCSI Target ] |
| dlp.srv.world |
+---------+----------+
10.0.0.30|
|
+----------------------+ | +----------------------+
| [ Cluster Node#1 ] |10.0.0.51 | 10.0.0.52| [ Cluster Node#2 ] |
| node01.srv.world +----------+----------+ node02.srv.world |
| | | |
+----------------------+ +----------------------+
|
| [1] |
Create a storage for share on ISCSI Target, refer to here.
On this example, it created ISCSI storage as IQN [iqn.2021-06.world.srv:dlp.target02] with [10G] size. |
| [2] | |
| [3] | On all Cluster Nodes, Change LVM System ID. |
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[root@node01 ~]#
vi /etc/lvm/lvm.conf # line 1235 : change system_id_source = " uname "
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| [4] | On a Node in Cluster, Set LVM on shared storage. [sdb] on the example below is shared storage from ISCSI Target. |
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# set LVM [root@node01 ~]# parted --script /dev/sdb "mklabel gpt" [root@node01 ~]# parted --script /dev/sdb "mkpart primary 0% 100%" [root@node01 ~]# parted --script /dev/sdb "set 1 lvm on"
# create physical volume [root@node01 ~]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created. # create volume group [root@node01 ~]# vgcreate vg_ha /dev/sdb1 Volume group "vg_ha" successfully created with system ID node01.srv.world # confirm the value of [System ID] equals the value of [$ uname -n] [root@node01 ~]# vgs -o+systemid VG #PV #LV #SN Attr VSize VFree System ID cs 1 2 0 wz--n- <29.00g 0 vg_ha 1 0 0 wz--n- <9.98g <9.98g node01.srv.world # create logical volume [root@node01 ~]# lvcreate -l 100%FREE -n lv_ha vg_ha Logical volume "lv_ha" created. # format with ext4 [root@node01 ~]# mkfs.ext4 /dev/vg_ha/lv_ha
# deactivate volume group [root@node01 ~]# vgchange vg_ha -an 0 logical volume(s) in volume group "vg_ha" now active |
| [5] | On other Nodes except a Node of [4], Scan LVM volumes to find new volume. |
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[root@node02 ~]# lvm pvscan --cache --activate ay pvscan[1739] PV /dev/vda2 online, VG cl is complete. pvscan[1739] PV /dev/sdb1 ignore foreign VG. pvscan[1739] VG cl run autoactivation. 2 logical volume(s) in volume group "cs" now active |
| [6] | On a Node of [4], Set shared storage as a Cluster resource. |
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# [lvm_ha] ⇒ any name # [vgname=***] ⇒ volume group name # [--group] ⇒ any name [root@node01 ~]# pcs resource create lvm_ha ocf:heartbeat:LVM-activate vgname=vg_ha vg_access_mode=system_id --group ha_group # confirm status # OK if LVM resource is [Started] [root@node01 ~]# pcs status
Cluster name: ha_cluster
Cluster Summary:
* Stack: corosync
* Current DC: node01.srv.world (version 2.0.5-9.el8_4.1-ba59be7122) - partition with quorum
* Last updated: Fri Jun 11 01:22:02 2021
* Last change: Fri Jun 11 01:19:52 2021 by root via cibadmin on node01.srv.world
* 2 nodes configured
* 2 resource instances configured
Node List:
* Online: [ node01.srv.world node02.srv.world ]
Full List of Resources:
* scsi-shooter (stonith:fence_scsi): Started node01.srv.world
* Resource Group: ha_group:
* lvm_ha (ocf::heartbeat:LVM-activate): Started node02.srv.world
Daemon Status:
corosync: active/enabled
pacemaker: active/enabled
pcsd: active/enabled
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