Goal:
A single Block Volume to be mounted on multiple servers.
We will attach a block volume on node 1 i.e. erpapp1.
The same block volume will be mounted on node 2 i.e. erpapp2.
Create a block volume and attach it to the compute instance.
There are two unformatted drives on Node 1:
Format the drive.
mkfs.xfs /dev/sdc
mkfs.xfs /dev/sdc
[root@erpapp1 ~]# mkfs.xfs /dev/sdd
meta-data=/dev/sdd isize=256 agcount=4, agsize=3276800 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=0 finobt=0, sparse=0, rmapbt=0, reflink=0
data = bsize=4096 blocks=13107200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=6400, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@erpapp1 ~]# blkid
/dev/sda3: UUID="b1d6c458-09df-4003-91f8-274d9bb47090" TYPE="xfs" PARTUUID="de4cf50d-6ab6-4b33-a1bb-b702baadb616"
/dev/sda1: SEC_TYPE="msdos" UUID="87DD-8565" TYPE="vfat" PARTLABEL="EFI System Partition" PARTUUID="8fb535c2-3a84-4cba-b9d1-46861f4ce6fb"
/dev/sda2: UUID="72b79731-1dec-4324-849b-ce3027278329" TYPE="swap" PARTUUID="a01c99a8-6311-4a73-9861-a107ea867dc3"
/dev/sdb: UUID="43b5eb95-de8d-452f-a8c3-8c883bf4c587" TYPE="xfs"
/dev/sdc: UUID="fd78adbf-d224-4552-b59a-89e93bf7bfcc" TYPE="xfs"
/dev/sdd: UUID="e958eed2-a136-4395-b8c0-e4718d46c571" TYPE="xfs"
Create the directory structure on both the nodes.
# mkdir /u02
# chown -R applprod:oinstall /u02
# mkdir /u03
# chown -R applprod:oinstall /u03
Add entry in /etc/fstab file of primary node for both the mount points.
UUID=fd78adbf-d224-4552-b59a-89e93bf7bfcc /u02 xfs defaults,noatime,_netdev 0 2
UUID="e958eed2-a136-4395-b8c0-e4718d46c571" /u03 xfs defaults,noatime,_netdev 0 2
Start NFS Service on the primary server.
To start an NFS server, use the following command:
# systemctl start nfs
To enable NFS to start at boot, use the following command:
# systemctl enable nfs
Add entry in the /etc/exports file of primary node for both the mount points.
cat /etc/exports
/u02 erpapp2(rw,sync,no_root_squash)
/u03 erpapp2(rw,sync,no_root_squash)
# exportfs -ra
Node 2:
# mkdir /u02
# chown -R applprod:oinstall /u02
# mkdir /u03
# chown -R applprod:oinstall /u03
Add entry in /etc/fstab file of secondary node for both the mount points.
erpapp1:/u02 /u02 nfs rw,nointr,bg,hard,timeo=600,wsize=65536,rsize=65536,nfsvers=4,tcp 0 0
erpapp1:/u03 /u03 nfs rw,nointr,bg,hard,timeo=600,wsize=65536,rsize=65536,nfsvers=4,tcp 0 0
Mount the drives on both the servers.
mount -a
[root@erpapp1 ~]# df -h /u02 /u03/
Filesystem Size Used Avail Use% Mounted on
/dev/sdc 500G 131G 370G 27% /u02
/dev/sdd 50G 33M 50G 1% /u03
[root@erpapp2 ~]# df -h /u02 /u03/
Filesystem Size Used Avail Use% Mounted on
erpapp1:/u02 500G 131G 370G 27% /u02
erpapp1:/u03 50G 33M 50G 1% /u03