Pacemaker : Set Cluster Resource (NFS)2021/06/11

Set NFS Cluster Resource and Configure Active/Passive NFS Server.

This example is based on the environment like follows.
1) Basic Cluster setting is done
2) Fence Device is set
3) LVM shared storage is set

                       +--------------------+
                       | [  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   |
|      NFS Server      |          |          |      NFS Server      |
+----------------------+          |          +----------------------+
                            vip:10.0.0.60
                                  |
                       +----------+---------+
                       | [   NFS Clients  ] |
                       |                    |
                       +--------------------+

[1]	On all Cluster Nodes, if Firewalld is running, allow NFS service.

[root@node01 ~]#

firewall-cmd --add-service=nfs --permanent

success

# for NFSv3

[root@node01 ~]#

firewall-cmd --add-service={nfs3,mountd,rpc-bind} --permanent

success

[root@node01 ~]#

firewall-cmd --reload

success

[2]	On a Node in Cluster, Add NFS resource. [/dev/vg_ha/lv_ha] on the example below is LVM shared storage.

[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 01:30:15 2021
  * Last change:  Fri Jun 11 01:21:31 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

# create a directory for NFS filesystem

[root@node01 ~]#

mkdir /home/nfs-share

# set Filesystem resource

# [nfs_share] ⇒ any name

# [device=***] ⇒ shared storage

# [directory=***] ⇒ mount point

# [--group ***] ⇒ set in the same group with shared storage

[root@node01 ~]#

pcs resource create nfs_share ocf:heartbeat:Filesystem device=/dev/vg_ha/lv_ha directory=/home/nfs-share fstype=ext4 --group ha_group

[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 01:31:20 2021
  * Last change:  Fri Jun 11 01:31:12 2021 by root via cibadmin on node01.srv.world
  * 2 nodes configured
  * 3 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
    * nfs_share (ocf::heartbeat:Filesystem):     Started node02.srv.world

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled

# mount automatically on a node that resources started

[root@node02 ~]#

df -hT /home/nfs-share

Filesystem              Type  Size  Used Avail Use% Mounted on
/dev/mapper/vg_ha-lv_ha ext4  9.8G   37M  9.3G   1% /home/nfs-share

# set nfsserver resource

# [nfs_daemon] ⇒ any name

# [nfs_shared_infodir=***] ⇒ specify a directory that NFS server related files are located

[root@node01 ~]#

pcs resource create nfs_daemon ocf:heartbeat:nfsserver nfs_shared_infodir=/home/nfs-share/nfsinfo nfs_no_notify=true --group ha_group

# set IPaddr2 resource

# virtual IP address clients access to NFS service

[root@node01 ~]#

pcs resource create nfs_vip ocf:heartbeat:IPaddr2 ip=10.0.0.60 cidr_netmask=24 --group ha_group

# set nfsnotify resource

# [source_host=***] ⇒ same one with vip above

[root@node01 ~]#

pcs resource create nfs_notify ocf:heartbeat:nfsnotify source_host=10.0.0.60 --group ha_group

[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 01:34:53 2021
  * Last change:  Fri Jun 11 01:34:48 2021 by root via cibadmin on node01.srv.world
  * 2 nodes configured
  * 6 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
    * nfs_share (ocf::heartbeat:Filesystem):     Started node02.srv.world
    * nfs_daemon        (ocf::heartbeat:nfsserver):      Started node02.srv.world
    * nfs_vip   (ocf::heartbeat:IPaddr2):        Started node02.srv.world
    * nfs_notify        (ocf::heartbeat:nfsnotify):      Started node02.srv.world

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled

[3]	On an active Node NFS filesystem mounted, set exportfs setting.

# create a directory for exportfs

[root@node02 ~]#

mkdir -p /home/nfs-share/nfs-root/share01

# set exportfs resource

# [nfs_root] ⇒ any name

# [clientspec=*** options=*** directory=***] ⇒ exports setting

# [fsid=0] ⇒ root point on NFSv4

[root@node02 ~]#

pcs resource create nfs_root ocf:heartbeat:exportfs clientspec=10.0.0.0/255.255.255.0 options=rw,sync,no_root_squash directory=/home/nfs-share/nfs-root fsid=0 --group ha_group

# set exportfs resource

[root@node02 ~]#

pcs resource create nfs_share01 ocf:heartbeat:exportfs clientspec=10.0.0.0/255.255.255.0 options=rw,sync,no_root_squash directory=/home/nfs-share/nfs-root/share01 fsid=1 --group ha_group

[root@node02 ~]#

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 01:36:58 2021
  * Last change:  Fri Jun 11 01:36:51 2021 by root via cibadmin on node02.srv.world
  * 2 nodes configured
  * 8 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
    * nfs_share (ocf::heartbeat:Filesystem):     Started node02.srv.world
    * nfs_daemon        (ocf::heartbeat:nfsserver):      Started node02.srv.world
    * nfs_vip   (ocf::heartbeat:IPaddr2):        Started node02.srv.world
    * nfs_notify        (ocf::heartbeat:nfsnotify):      Started node02.srv.world
    * nfs_root  (ocf::heartbeat:exportfs):       Started node02.srv.world
    * nfs_share01       (ocf::heartbeat:exportfs):       Started node02.srv.world

Daemon Status:
  corosync: active/enabled
  pacemaker: active/enabled
  pcsd: active/enabled

[root@node02 ~]#

showmount -e

Export list for node02.srv.world:
/home/nfs-share/nfs-root         10.0.0.0/255.255.255.0
/home/nfs-share/nfs-root/share01 10.0.0.0/255.255.255.0

[4]	Verify settings to access to virtual IP address with NFS from any client computer.

# mount with NFSv4

[root@client ~]#

mount -t nfs4 10.0.0.60:share01 /mnt

[root@client ~]#

df -hT /mnt

Filesystem         Type  Size  Used Avail Use% Mounted on
10.0.0.60:/share01 nfs4  9.8G   37M  9.3G   1% /mnt

# mount with NFSv3

[root@client ~]#

mount -t nfs 10.0.0.60:/home/nfs-share/nfs-root/share01 /mnt

[root@client ~]#

df -T /mnt

Filesystem                                 Type 1K-blocks  Used Available Use% Mounted on
10.0.0.60:/home/nfs-share/nfs-root/share01 nfs   10231808 37376   9655296   1% /mnt

Matched Content