After an OpenVZ VPS is created, can i automatically execute some vzctl commands on it?

Comments

• rds100 Member

  February 2016

  /etc/vz/dists/scripts/postcreate.sh

  Thanked by 1postcd
• Jacob Member

  February 2016

  Does the panel you're using not give you this functionality?

  @postcd said:
  After an OpenVZ VPS is created/mounted/started(vzctl start), can i set the host server so it automatically execute some vzctl commands on the VPS?

  i mean enable tun/tap

  set netfilter full for the virtual machine

  append new line into /etc/vz/conf/CTID.conf

  VPS is created from within web panel which i cant tweak so this would need to be set on the host server to execute by default on aall new VPS
• postcd Member

  February 2016 edited February 2016

  @rds100 said:
  /etc/vz/dists/scripts/postcreate.sh

  Thank you, in this file they says:

  Runs on the host system and performs these postinstall tasks for a particular container (specified by $VE_ROOT environment)

  i assume $VE_ROOT is for example "/vz/root/3050"

  and to get CTID for further use (like for vzctl commands) i just add line:

  VPSID=$(echo $VE_ROOT |grep -o '[0-9]*')

  vzctl set $VPSID parametershere
• Corey Member

  February 2016

  Can't you also just add this stuff in the default vz.conf file?
• elgs Member

  February 2016

  How did you create your OpenVZ containers? Manually, WHMCS modules or script? Essentially you might need to attach some kind of hooks upon CT (re)created.
• AlexanderM Member, Patron Provider, Top Host

  February 2016

  You can edit the default config at /etc/vz/conf/*.conf-sample and it gets copied to CT configuration during creation.

  Alexander

  Thanked by 1postcd
• postcd Member

  February 2016 edited February 2016

  Into /etc/vz/dists/scripts/postcreate.sh i pasted function like:

  customcommands()

  {

  VPSID=$(echo $VE_ROOT |grep -o '[0-9]*')

  vzctl set $VPSID --ioprio 3 --save

  }

  and called it within that script. After i do vzctl create, it says that "Container already locked".

  I see there is also /etc/vz/dists/scripts/prestart.sh file, but it is used also on VPS restarts.

  @AlexanderM

  $ cat /etc/vz/vz.conf|grep CONFIGFILE

  CONFIGFILE="vswap-256m"

  that config file is there: /etc/vz/conf/ve-vswap-256m.conf-sample

  OpenVZ says: "During container creation, this configuration file is copied to CTID.conf, for example, with CTID of 123: /etc/vz/conf/123.conf"

  so i assume i just need to edit that file ve-vswap-256m.conf-sample in my case or other *.conf-sample file if im using web based control panel to automate VPSs setups using different templates.
• linuxthefish Member

  February 2016

  You need to wait until the container is fully setup before running commands, add something like sleep 10 to your script
• postcd Member

  February 2016 edited February 2016

  @linuxthefish , that is good idea

  i also wish to confirm that method with modiffying /etc/vz/conf/ve-vswap-256m.conf-sample file and other .conf-sample files worked to populate newly created VPSs conf files with additional values like in my case:

  IOLIMIT="numberhere"

  IOPSLIMIT="numberhere"