Pacemaker : Configure GFS2 Filesystem2021/06/11 |
Configure GFS2 Filesystem on 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 shared storage on ISCSI Target, refer to here.
On this example, it created ISCSI storage as IQN [iqn.2021-06.world.srv:dlp.target03] with [10G] size. |
[2] | |
[3] | On all Cluster Nodes, Install required packages and change LVM settings. |
# enable [HighAvailability, ResilientStorage] repo and install (disabled by default) [root@node01 ~]# dnf --enablerepo=ha,resilientstorage -y install lvm2-lockd gfs2-utils dlm
[root@node01 ~]#
vi /etc/lvm/lvm.conf # line 1178 : change use_lvmlockd = 1
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[4] | On a Node in cluster, configure DLM resource for GFS2 filesystem. |
# set [no-quorum-policy=freeze] on GFS2 [root@node01 ~]# pcs property set no-quorum-policy=freeze
# create controld resource # [dlm] ⇒ any name you like # [--group] ⇒ any group name [root@node01 ~]# pcs resource create dlm ocf:pacemaker:controld op monitor interval=30s on-fail=fence --group locking
# create clone of [locking] to activate it on all nodes in cluster [root@node01 ~]# pcs resource clone locking interleave=true
# create lvmlockd resource # [lvmlockdd] ⇒ any name # [--group] ⇒ the same group with controld resource [root@node01 ~]# pcs resource create lvmlockdd ocf:heartbeat:lvmlockd op monitor interval=30s on-fail=fence --group locking
# verify status # OK if all [Started] [root@node01 ~]# pcs status --full Cluster name: ha_cluster Cluster Summary: * Stack: corosync * Current DC: node01.srv.world (1) (version 2.1.2-4.el8-ada5c3b36e2) - partition with quorum * Last updated: Wed Mar 9 15:25:26 2022 * Last change: Wed Mar 9 15:25:07 2022 by root via cibadmin on node01.srv.world * 2 nodes configured * 5 resource instances configured Node List: * Online: [ node01.srv.world (1) node02.srv.world (2) ] Full List of Resources: * scsi-shooter (stonith:fence_scsi): Started node01.srv.world * Clone Set: locking-clone [locking]: * Resource Group: locking:0: * dlm (ocf::pacemaker:controld): Started node01.srv.world * lvmlockdd (ocf::heartbeat:lvmlockd): Started node01.srv.world * Resource Group: locking:1: * dlm (ocf::pacemaker:controld): Started node02.srv.world * lvmlockdd (ocf::heartbeat:lvmlockd): Started node02.srv.world Migration Summary: Fencing History: * unfencing of node02.srv.world successful: delegate=node02.srv.world, client=pacemaker-controld.188120, origin=node02.srv.world, completed='2022-03-09 17:15:21 +09:00' * unfencing of node01.srv.world successful: delegate=node01.srv.world, client=pacemaker-controld.188120, origin=node02.srv.world, completed='2022-03-09 17:15:21 +09:00' Tickets: PCSD Status: node01.srv.world: Online node02.srv.world: Online Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled |
[5] | On a Node in cluster, configure shared volume on shared storage. [sdb] on the example below is shared storage from ISCSI Target. |
# 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 chared volume [root@node01 ~]# vgcreate --shared vg_gfs2 /dev/sdb1 Volume group "vg_gfs2" successfully created VG vg_gfs2 starting dlm lockspace Starting locking. Waiting until locks are ready... |
[6] | Move to an another node that you did not configure shared volume on [5] and start lock manager for shared volume. |
[root@node02 ~]# vgs VG #PV #LV #SN Attr VSize VFree cs 1 2 0 wz--n- <29.00g 0 vg_gfs2 1 0 0 wz--ns <9.98g <9.98g[root@node02 ~]# vgchange --lock-start vg_gfs2 VG vg_gfs2 starting dlm lockspace Starting locking. Waiting until locks are ready... |
[7] | Back to the node you set shared volume and create logical volume and configure GFS2 filesystem. |
# create logical volume [root@node01 ~]# lvcreate -l 100%FREE -n lv_gfs2 vg_gfs2 Logical volume "lv_gfs2" created. # format with GFS2 [root@node01 ~]# mkfs.gfs2 -j2 -p lock_dlm -t ha_cluster:gfs2-01 /dev/vg_gfs2/lv_gfs2
This will destroy any data on /dev/dm-2
Are you sure you want to proceed? [y/n] y
Discarding device contents (may take a while on large devices): Done
Adding journals: Done
Building resource groups: Done
Creating quota file: Done
Writing superblock and syncing: Done
Device: /dev/vg_gfs2/lv_gfs2
Block size: 4096
Device size: 9.98 GB (2615296 blocks)
Filesystem size: 9.98 GB (2615293 blocks)
Journals: 2
Journal size: 32MB
Resource groups: 42
Locking protocol: "lock_dlm"
Lock table: "ha_cluster:gfs2-01"
UUID: 599ad893-7251-4281-beee-fb02d1
# create LVM-activate resource # [shared_lv] ⇒ any name # [--group] ⇒ any group name [root@node01 ~]# pcs resource create shared_lv ocf:heartbeat:LVM-activate lvname=lv_gfs2 vgname=vg_gfs2 activation_mode=shared vg_access_mode=lvmlockd --group shared_vg
# create clone of [LVM-activate] [root@node01 ~]# pcs resource clone shared_vg interleave=true
# set start order as [locking] → [shared_vg] [root@node01 ~]# pcs constraint order start locking-clone then shared_vg-clone Adding locking-clone shared_vg-clone (kind: Mandatory) (Options: first-action=start then-action=start) # set that [shared_vg] and [locking] start on a same node [root@node01 ~]# pcs constraint colocation add shared_vg-clone with locking-clone
# create Filesystem resource # [shared_fs] ⇒ any name # [device] ⇒ device with GFS2 formatted # [directory] ⇒ any directory you'd like to mount GFS2 filesystem # [--group] ⇒ the same group with LVM-activate resource [root@node01 ~]# pcs resource create shared_fs ocf:heartbeat:Filesystem device="/dev/vg_gfs2/lv_gfs2" directory="/home/gfs2-share" fstype="gfs2" options=noatime op monitor interval=10s on-fail=fence --group shared_vg
# verify status # OK if all [Started] [root@node01 ~]# pcs status --full Cluster name: ha_cluster Cluster Summary: * Stack: corosync * Current DC: node02.srv.world (2) (version 2.1.2-4.el8-ada5c3b36e2) - partition with quorum * Last updated: Wed Mar 9 17:24:51 2022 * Last change: Wed Mar 9 17:24:34 2022 by root via cibadmin on node01.srv.world * 2 nodes configured * 9 resource instances configured Node List: * Online: [ node01.srv.world (1) node02.srv.world (2) ] Full List of Resources: * scsi-shooter (stonith:fence_scsi): Started node01.srv.world * Clone Set: locking-clone [locking]: * Resource Group: locking:0: * dlm (ocf::pacemaker:controld): Started node01.srv.world * lvmlockdd (ocf::heartbeat:lvmlockd): Started node01.srv.world * Resource Group: locking:1: * dlm (ocf::pacemaker:controld): Started node02.srv.world * lvmlockdd (ocf::heartbeat:lvmlockd): Started node02.srv.world * Clone Set: shared_vg-clone [shared_vg]: * Resource Group: shared_vg:0: * shared_lv (ocf::heartbeat:LVM-activate): Started node01.srv.world * shared_fs (ocf::heartbeat:Filesystem): Started node01.srv.world * Resource Group: shared_vg:1: * shared_lv (ocf::heartbeat:LVM-activate): Started node02.srv.world * shared_fs (ocf::heartbeat:Filesystem): Started node02.srv.world Migration Summary: Fencing History: * unfencing of node02.srv.world successful: delegate=node02.srv.world, client=pacemaker-controld.188120, origin=node02.srv.world, completed='2022-03-09 17:15:21 +09:00' * unfencing of node01.srv.world successful: delegate=node01.srv.world, client=pacemaker-controld.188120, origin=node02.srv.world, completed='2022-03-09 17:15:21 +09:00' Tickets: PCSD Status: node01.srv.world: Online node02.srv.world: Online Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled # OK if GFS2 filesystem is mounted on both nodes [root@node01 ~]# df -hT /home/gfs2-share Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/vg_gfs2-lv_gfs2 gfs2 10G 67M 10G 1% /home/gfs2-share[root@node02 ~]# df -hT /home/gfs2-share Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/vg_gfs2-lv_gfs2 gfs2 10G 67M 10G 1% /home/gfs2-share |
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