RHEL 8 New Features for Experienced Linux Administrators

Log in to servera as the root user.

[student@workstation ~]$ ssh root@servera

If not previously done, install the stratisd and the stratis-cli packages on servera.

[root@servera ~]# yum install stratisd stratis-cli
...output omitted...
Is this ok [y/N]: y
...output omitted...

If not previously done, enable the stratisd service on servera to start at boot time.

[root@servera ~]# systemctl enable --now stratisd
Created symlink /etc/systemd/system/sysinit.target.wants/stratisd.service → /usr/lib/systemd/system/stratisd.service.

Verify that the stratisd service is available.

[root@servera ~]# systemctl status stratisd

Create the labpool pool with the /dev/vdb and the /dev/vdc devices.

[root@servera ~]# stratis pool create labpool /dev/vdb /dev/vdc

Verify that the labpool pool is now available.

[root@servera ~]# stratis pool list
Name        Total Physical Size  Total Physical Used
labpool               2 GiB             56 MiB            

Create the labfs file system in the labpool pool.

[root@servera ~]# stratis fs create labpool labfs

Verify that the labfs file system is now available.

[root@servera ~]# stratis fs list labpool
Pool Name       Name         Used     Created            Device                 
labpool     labfs  546 MiB  Jan 23 2019 08:44  /stratis/labpool/labfs

Create a new mount point named /stratislab.

[root@servera ~]# mkdir /stratislab

Mount the labfs file system into the /stratislab directory.

[root@servera ~]# mount /stratis/labpool/labfs /stratislab

Verify that the labfs file system is now accessible.

[root@servera ~]# mount
... output omitted ...
/dev/mapper/stratis-1-b5ceb83a7c57488a9c02b501d1419ce4-thin-fs-333a2d9922c04ee6abebcc71bdb047b5 on /stratislab type xfs (rw,relatime,seclabel,attr2,inode64,sunit=2048,swidth=2048,noquota)

Create a snapshot of the labfs file system. Name the snapshot labfs-snapshot.

[root@servera ~]# stratis fs snapshot labpool labfs labfs-snapshot

Destroy the labfs-snapshot snapshot.

[root@servera ~]# stratis filesystem destroy labpool labfs-snapshot

Unmount the labfs file system.

[root@servera ~]# umount /stratis/labpool/labfs

Destroy the labfs file system.

[root@servera ~]# stratis filesystem destroy labpool labfs

Destroy the labpool pool.

[root@servera ~]# stratis pool destroy labpool

Verify that the labpool pool is not available.

[root@servera ~]# stratis pool list
Name    Total Physical Size  Total Physical Used

Create the vdolab volume with the /dev/vdd device. Use 30 GB as its logical size.

[root@servera ~]# vdo create --name=vdolab --device=/dev/vdd --vdoLogicalSize=30G
Creating VDO vdolab
Starting VDO vdolab
Starting compression on VDO vdolab
VDO instance 0 volume is ready at /dev/mapper/vdolab

Verify that the vdolab volume is available.

[root@servera ~]# vdo list
vdolab

Create an XFS file system on the vdolab volume. Wait until the system registers the device node.

[root@servera ~]# mkfs.xfs -K /dev/mapper/vdolab
...output omitted...
[root@servera ~]# udevadm settle

Create the /mnt/vdolab directory.

[root@servera ~]# mkdir -m 1777 /mnt/vdolab

Mount the vdolab volume on /mnt/vdolab.

[root@servera ~]# mount /dev/mapper/vdolab /mnt/vdolab/

Unmount the vdolab volume.

[root@servera ~]# umount /mnt/vdolab

Remove the vdolab volume.

[root@servera ~]# vdo remove --name=vdolab
Removing VDO vdolab
Stopping VDO vdolab

Log out from servera.

[root@servera ~]# exit
[student@workstation ~]$