RHEL 8 New Features for Experienced Linux Administrators

Install the Stratis storage manager on servera.

1. Log in to servera as the root user.

   [student@workstation ~]$ ssh root@servera

2. 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...

3. 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.

Use the Stratis storage manager to create a new pool with the /dev/vdb device.

1. Create the stratispool pool with the /dev/vdb device.

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

2. Verify that the stratispool pool is now available.

   [root@servera ~]# stratis pool list
   Name        Total Physical Size  Total Physical Used
   stratispool               1 GiB               52 MiB            
   

Add /dev/vdc as an additional device to the stratispool pool.

1. Add /dev/vdc as an additional device to the stratispool pool.

   [root@servera ~]# stratis pool add-data stratispool /dev/vdc

2. Verify that /dev/vdc is part of the stratispool pool.

   [root@servera ~]# stratis blockdev
   Pool Name   Device Node    Physical Size   State  Tier
   stratispool /dev/vdb               1 GiB  In-use  Data
   stratispool /dev/vdc               1 GiB  In-use  Data            
   

Create the filesystem1 file system in the stratispool pool.

1. Create the filesystem1 file system in the stratispool pool.

   [root@servera ~]# stratis fs create stratispool filesystem1

2. Verify that the filesystem1 file system is now available.

   [root@servera ~]# stratis fs list stratispool
   Pool Name       Name         Used     Created            Device                 
   stratispool     filesystem1  546 MiB  Jan 23 2019 08:44  /stratis/stratispool/filesystem1

Mount the filesystem1 file system, and create a new file on it.

1. Create a new mount point, named /stratisvol.

   [root@servera ~]# mkdir /stratisvol

2. Mount the filesystem1 file system into the /stratisvol directory.

   [root@servera ~]# mount /stratis/stratispool/filesystem1 /stratisvol

3. Verify that the filesystem1 file system is now accessible.

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

4. Create a new empty file named file.txt.

   [root@servera ~]# touch /stratisvol/file.txt

Create a snapshot of the filesystem1 file system. When done, remove the file you previously created.

1. Create a snapshot, named filesystem1-snapshot, of the filesystem1 file system.

   [root@servera ~]# stratis fs snapshot stratispool filesystem1 filesystem1-snapshot

2. Remove the file.txt file.

   [root@servera ~]# rm -f /stratisvol/file.txt

Inspect the filesystem1-snapshot snapshot you just created, and verify that the file is available.

1. Create a mount point named /stratisvolsnap, for the snapshot.

   [root@servera ~]# mkdir /stratisvolsnap

2. Mount the filesystem1-snapshot snapshot in the /stratisvolsnap directory.

   [root@servera ~]# mount /stratis/stratispool/filesystem1-snapshot /stratisvolsnap/

3. Verify that the file.txt file is available.

   [root@servera ~]# ls /stratisvolsnap
   file.txt
   

Destroy the filesystem1-snapshot snapshot.

1. Unmount the filesystem1-snapshot snapshot.

   [root@servera ~]# umount /stratis/stratispool/filesystem1-snapshot

2. Destroy the filesystem1-snapshot snapshot.

   [root@servera ~]# stratis filesystem destroy stratispool filesystem1-snapshot

Destroy the filesystem1 file system.

1. Unmount the filesystem1 file system.

   [root@servera ~]# umount /stratis/stratispool/filesystem1

2. Destroy the filesystem1 file system.

   [root@servera ~]# stratis filesystem destroy stratispool filesystem1

Destroy the stratispool pool. When done, log out from servera.

1. Destroy the stratispool pool.

   [root@servera ~]# stratis pool destroy stratispool

2. Verify that the stratispool pool is not available.

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

3. Log out from servera.

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