Difference between revisions of "Rename vServer"

Latest revision as of 22:23, 21 October 2011

[edit] General Administrative Tasks and System Tweaks

[edit] Renaming a vServer

Suppose you want to rename your vserver (the directories not the hostname). This can be accomplished by renaming the config directory and the root for the vserver in question, then modifying 3 symlinks to match.

  1. Stop the vserver in question
  2. rename the /vservers/<server name> directory
  3. rename the /etc/vservers/<server name> directory
  4. update link: /etc/vservers/<server name>/run -> /var/run/vservers/<server name>
  5. update link: /etc/vservers/<server name>/vdir -> /etc/vservers/.defaults/vdirbase/<server name>
  6. update link: /etc/vservers/<server name>/cache -> /etc/vservers/.defaults/cachebase/<server name>
  7. update link: /var/run/vservers.rev/<server XID> -> /etc/vservers/<server name>
  8. Start the vserver in question. It should start properly.

A script is provided below to help speed up the renaming process and reduce downtime by automating the sequence. Please make sure you verify the first 5 variables before running the script!

[edit] Sample vServer renaming bash script (wrote for Debian)

The script below does not create the dir/symlink for the cache dir - I will update it within the week.

#!/bin/sh

data_path="/data/vservers"
config_path="/etc/vservers"
run_path="/var/run/vservers"
run_rev_path="/var/run/vservers.rev"
vserver_exec="/usr/sbin/vserver"

### DO NOT CHANGE ANYTHING AFTER THIS LINE ###

orig_dir=`pwd`

function throwError {
  echo ""
  echo "-------------------------------"
  echo "Error: $error";
  echo "-------------------------------"
  cd $orig_dir
  exit 0
}

function checkExist {
  echo ""
  cd $data_path
  ls --color $data_path
  echo ""
  echo -n "What is the name of the vServer you wish to rename? : "
  read orig_name

  if [[ ! -d "$data_path/$orig_name" ]]; then
    checkExist
  fi
}

function newName {
  echo ""
  echo -n "What is the new name you would like? : "
  read new_name

  if [[ "$new_name" == "" ]]; then
    echo "Name supplied was empty"
    newName
  fi

  if [[ -d "$data_path/$new_name" ]]; then
    echo "Name already in use!"
    newName
  fi
}

function confirm {
  read u_confirm
  if [[ "$u_confirm" != "y" ]]; then
    error="Cancelled by user"
    throwError
  fi
}

echo ""
echo "Data path:         $data_path"
echo "Config path:       $config_path"
echo "Run path:          $run_path"
echo "Run rev path:      $run_rev_path"
echo "vServer executable $vserver_exec"
echo ""
echo -n "Are these paths correct? y/N : "
confirm

checkExist
newName

# Check all the dirs and symlinks exist

if [[ ! -d "$config_path/$orig_name" ]] || [[ "$orig_name" == "" ]]; then
  error="vServer config path doesn't exist"
  throwError
fi

# Grab the context for that vServer
context=`cat $config_path/$orig_name/context`

if [[ ! -d "$run_rev_path/$context" ]]; then
  error="vServer run rev path ($run_rev_path/$context) doesn't exist"
  throwError
fi

if [[ ! -f "$vserver_exec" ]]; then
  error="vServer exec file doesn't exist"
  throwError
fi


# Confirm before stopping vServer

echo ""
echo -n "Are you ready to start the renaming process? y/N : "
confirm

$vserver_exec $orig_name stop

mv $data_path/$orig_name $data_path/$new_name

mv $config_path/$orig_name $config_path/$new_name

/bin/rm $config_path/$new_name/run
ln -s $run_path/$new_name $config_path/$new_name/run

/bin/rm $config_path/$new_name/vdir
ln -s $config_path/.defaults/vdirbase/$new_name $config_path/$new_name/vdir

/bin/rm $config_path/$new_name/cache
ln -s $config_path/.defaults/cachebase/$new_name $config_path/$new_name/cache

/bin/rm $run_rev_path/$context
ln -s $config_path/$new_name $run_rev_path/$context

$vserver_exec $new_name start

cd $orig_dir