Find out disk usage of all VPSs in an OpenVZ node
This article describes how you can find out disk usage of active (or running) VPSs in your SubHosting.net OpenVZ hardware node running CentOS 5/6 operating system.
Running the commands given here requires root user privilege. Use vzlist command to get the disk usage of running VPSs and awk command to process and display the output in desired format. Both vzlist and awk should be installed by default in your OpenVZ hardware node. Otherwise, install them using YUM package manager. You need to install gawk (for awk) and vzctl (for vzlist) packages.
Displaying disk usage of active VPSs
Use vzlist command and pipe its output to awk command as given below:
vzlist -H -o veid,hostname,diskspace | awk '{ printf("%d\t%s\t%.2f GB\n", $1, $2, $3/(1024*1024))}'
2002 vps.domain1.com 171.75 GB
2006 vps.domain2.com 7.00 GB
2008 vps.domain3.com 120.19 GB
2009 vps.domain4.com 0.94 GB
2011 vps.domain5.com 67.67 GB
2013 vps.domain6.com 132.94 GB
2015 vps.domain7.com 37.74 GB
2016 vps.domain8.com 5.80 GB
2018 vps.domain9.com 109.59 GB
2019 vps.domain10.com 18.14 GB
2021 vps.domain11.com 55.15 GB
2022 vps.domain12.com 35.29 GB
Displaying disk usage of active VPSs with total disk usage
You can modify awk command as follows to find out sum of disk usage of all VPSs:
vzlist -H -o veid,hostname,diskspace | awk '{ printf("%d\t%s\t%.2f GB\n", $1, $2, $3/(1024*1024))} {sum += $3} END {printf("Total disk usage: %.2f GB\n", sum/(1024*1024))}'
2002 vps.domain1.com 171.75 GB
2006 vps.domain2.com 7.00 GB
2008 vps.domain3.com 120.19 GB
2009 vps.domain4.com 0.94 GB
2011 vps.domain5.com 67.67 GB
2013 vps.domain6.com 132.94 GB
2015 vps.domain7.com 37.74 GB
2016 vps.domain8.com 5.80 GB
2018 vps.domain9.com 109.59 GB
2019 vps.domain10.com 18.14 GB
2021 vps.domain11.com 55.15 GB
2022 vps.domain12.com 35.29 GB
Total disk usage: 762.12 GB