Free Up Space Virtuozzo 7 / Compress VPS Containers HDD

Free Up Space On Virtuozzo Hosts

When using Virtuozzo and Ploop containers sometimes there can be issues with space management. It’s possible that you can delete a file inside a container and the container’s space usage is decreased but then that decrease in space is not reflected on the host node.

Symptom

For example, your hostnode has a 1TB hard drive and the full 1TB is being used. You have a container on this hostnode that is 50GB in size and the full 50GB is being used. You delete a .tar.gz file inside this container which is 10GB and the space on the container is now showing as using 40GB. When you check the hostnodes disk usage this 10GB is not showing.

Resolution

You have the ability to compress containers hard drives to free up space Virtuozzo. You achieve this by removing all the empty blocks from the expanding virtual disk to reduce its size.

yum install nano -y ; nano /bin/compress

Inside this file place the following code;

 !/bin/sh
 vzlist -a | awk '{print $1}' | sed '/CTID/d' > ctid.txt
 echo "Compact started on $(date)" >> compactlogs.txt
 for i in cat ctid.txt
 do
 prl_disk_tool compact --hdd /vz/private/$i/root.hdd;
 done
 echo "Compact finished on $(date)" >> compactlogs.txt

Save and close the file and chmod it to 700

chmod 700 /bin/compress

Finally, run the file and your containers will be compressed. It’s totally safe to run and will not delete any information.

/bin/compress

It could take up to 24 hours to run on a SATA based hostnode. A log file will be placed called compactlogs.txt which will tell you the time the compression started and ended.

After the process is complete check the space usage on your hostnode with the df -h command to see your newly gained space.

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