Pacemaker : Set LVM Shared Storage2022/03/25 |
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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 Configure 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.2022-01.world.srv:dlp.target02] with [10G] size. |
| [2] | On all Cluster Nodes, Change LVM System ID. |
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[root@node01 ~]#
vi /etc/lvm/lvm.conf # line 1357 : uncomment and change system_id_source = " uname "
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| [3] | 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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# current session [root@node01 ~]# iscsiadm -m session -o show tcp: [1] 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target01 (non-flash) # discover [root@node01 ~]# iscsiadm -m discovery -t sendtargets -p 10.0.0.30 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target01 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target02 # login [root@node01 ~]# iscsiadm -m node --login --target iqn.2022-01.world.srv:dlp.target02
[root@node01 ~]#
iscsiadm -m session -o show tcp: [1] 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target01 (non-flash) tcp: [2] 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target02 (non-flash) # 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 --setautoactivation n 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
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| [4] | On other Nodes except a Node of [3], Scan LVM volumes to find new volume. |
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[root@node02 ~]#
iscsiadm -m session -o show tcp: [1] 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target01 (non-flash)
[root@node02 ~]#
iscsiadm -m discovery -t sendtargets -p 10.0.0.30 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target01 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target02
[root@node02 ~]#
iscsiadm -m node --login --target iqn.2022-01.world.srv:dlp.target02
[root@node02 ~]#
[root@node02 ~]# iscsiadm -m session -o show tcp: [1] 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target01 (non-flash) tcp: [2] 10.0.0.30:3260,1 iqn.2022-01.world.srv:dlp.target02 (non-flash) lvmdevices --adddev /dev/sdb1 [root@node02 ~]# lvm pvscan --cache --activate ay pvscan[17327] PV /dev/vda2 online, VG cs is complete. pvscan[17327] PV /dev/sdb1 ignore foreign VG. pvscan[17327] VG cs run autoactivation. 2 logical volume(s) in volume group "cs" now active |
| [5] | On a Node of [3], 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 --future # 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 2.1.2-4.el9-ada5c3b36e2) - partition with quorum
* Last updated: Fri Mar 25 10:01:54 2022
* Last change: Fri Mar 25 10:01:47 2022 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 node01.srv.world
Daemon Status:
corosync: active/enabled
pacemaker: active/enabled
pcsd: active/enabled
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