Configuring an LVM Volume with an ext4

 

3.2. Configuring an LVM Volume with an ext4 File System

This use case requires that you create an LVM logical volume on storage that is shared between the nodes of the cluster.

The following procedure creates an LVM logical volume and then creates an ext4 file system on that volume. In this example, the shared partition /dev/sdb1 is used to store the LVM physical volume from which the LVM logical volume will be created.

Note

LVM volumes and the corresponding partitions and devices used by cluster nodes must be connected to the cluster nodes only.

Since the /dev/sdb1 partition is storage that is shared, you perform this procedure on one node only,

1. Create an LVM physical volume on partition /dev/sdb1.

   [root@z1 ~]# pvcreate /dev/sdb1
     Physical volume "/dev/sdb1" successfully created
   

2. Create the volume group my_vg that consists of the physical volume /dev/sdb1.

   [root@z1 ~]# vgcreate my_vg /dev/sdb1
     Volume group "my_vg" successfully created
   

3. Create a logical volume using the volume group my_vg.

   [root@z1 ~]# lvcreate -L450 -n my_lv my_vg
     Rounding up size to full physical extent 452.00 MiB
     Logical volume "my_lv" created
   

   You can use the lvs command to display the logical volume.

   [root@z1 ~]# lvs
     LV      VG      Attr      LSize   Pool Origin Data%  Move Log Copy%  Convert
     my_lv   my_vg   -wi-a---- 452.00m
     ...
   

4. Create an ext4 file system on the logical volume my_lv.

   [root@z1 ~]# mkfs.ext4 /dev/my_vg/my_lv
   mke2fs 1.42.7 (21-Jan-2013)
   Filesystem label=
   OS type: Linux