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follow these steps:
 
follow these steps:
  
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==Create the container==
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1 - Create a container using centos-4-i386-minimal and set a valid nameserver  
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<pre>
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Create a container using centos-4-i386-minimal and set a valid nameserver:
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vzctl create CTID --ostemplate centos-4-i386-minimal --config CONFIG_TEMPLATE --ipadd container_IP --hostname temp
 +
vzctl set CTID --nameserver NAMESERVER_IP --save
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</pre>
 +
2 - Enter in container
 
<pre>
 
<pre>
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vzctl create $CTID --ostemplate centos-4-i386-minimal --config CONFIG_TEMPLATE --ipadd container_IP --hostname temp
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vzctl enter CTID
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vzctl set $CTID --nameserver NAMESERVER_IP --save
 
 
</pre>
 
</pre>
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3 - Install centos-5-release packages
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==Install centos-5-release packages==
 
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Use <code>vzctl exec</code> to execute the rpm install command on the container:
 
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<pre>
 
<pre>
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vzctl exec $CTID rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-notes-5.6-0.i386.rpm \ http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-5-6.el5.centos.1.i386.rpm
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rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-notes-5.5-0.i386.rpm
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rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-5-5.el5.centos.i386.rpm
 
</pre>
 
</pre>
 
Note: centos-release-5 depends on notes-package, start with that one.
 
Note: centos-release-5 depends on notes-package, start with that one.
  
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==Backup dev==
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4 - Backup your /dev/, since initscripts need udev and will remove vzdev you'll net the backup
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<pre>
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Backup the container /dev/ directory, as initscripts needs udev and will remove vzdev you'll need the backup:
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tar -cf dev.tar ./dev
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</pre>
 +
5 - Install initscripts package (forced and with no deps)
 
<pre>
 
<pre>
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tar -cf $CTID.dev.tar -C /vz/private/$CTID dev
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rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/initscripts-8.45.30-2.el5.centos.i386.rpm --force --nodeps
 
</pre>
 
</pre>
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6 - Exit from container
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==Install initscripts package==
 
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Install initscripts package (forced and with no deps), as per below:
 
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<pre>
 
<pre>
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vzctl exec $CTID rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/initscripts-8.45.33-1.el5.centos.i386.rpm --force --nodeps
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exit
 
</pre>
 
</pre>
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7 - In /etc/vz/conf/CSID.conf replace
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Note: If the "transfer failed", go to the [http://mirror.centos.org/centos/5/os/i386/CentOS/ CentOS5 mirror] and find the latest initscripts rpm and use that instead.
 
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==Update conf file==
 
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Edit /etc/vz/conf/$CSID.conf and replace
 
 
<pre>
 
<pre>
 
OSTEMPLATE="centos-4-i386-minimal"
 
OSTEMPLATE="centos-4-i386-minimal"
 
</pre>
 
</pre>
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with
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to
 
<pre>
 
<pre>
 
OSTEMPLATE="centos-5-i386-minimal"
 
OSTEMPLATE="centos-5-i386-minimal"
 
</pre>
 
</pre>
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8 - Coppy existing template from
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Alternatively, use the 'sed' command to replace it:
 
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<pre>
 
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sed -i 's#OSTEMPLATE="centos-4#OSTEMPLATE="centos-5#g' /etc/vz/conf/$CTID.conf
 
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</pre>
 
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==Copy existing template==
 
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Copy existing template from:
 
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<pre>
 
<pre>
 
/vz/template/centos/4
 
/vz/template/centos/4
Line 68: Line 50:
 
/vz/template/centos/5
 
/vz/template/centos/5
 
</pre>
 
</pre>
 +
9 - In /vz/template/centos/4/i386/config/yum.conf change mirrors to CentOS 5
  
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==Update yum.conf==
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10 - Upgrade container packages using vzyum (32bit only)
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In /vz/template/centos/5/i386/config/yum.conf change mirrors to CentOS 5
 
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Using sed:
 
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<pre>
 
<pre>
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sed -i 's#centos4#centos5#g' /vz/template/centos/5/i386/config/yum.conf
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vzyum CTID upgrade
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sed -i 's#CentOS 4#CentOS 5#g' /vz/template/centos/5/i386/config/yum.conf
 
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sed -i 's#centos/4/#centos/5/#g' /vz/template/centos/5/i386/config/yum.conf
 
 
</pre>
 
</pre>
 +
Note: on 64-bit yum db-version might complain. Do "rm /vz/root/VZNUM/var/lib/rpm/__*" to delete conflicting DB.
  
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==Upgrade container packages==
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11 - Stop your VE
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db-version will complain, so delete the conflicting database first:
 
 
<pre>
 
<pre>
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rm -fr /vz/root/$CTID/var/lib/rpm/__*
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vzctl stop CTID
 
</pre>
 
</pre>
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12 - Replace the new /dev/ with the old one
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Now run vzyum to upgrade the contain packages:
 
 
<pre>
 
<pre>
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vzyum $CTID upgrade
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cd /vz/private/CTID
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rm -rf dev
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tar -xvf dev.tar
 
</pre>
 
</pre>
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13 - Leave the container private dir (or it will not stard)
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===Troubleshooting===
 
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If you get this error:
 
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<pre>
 
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Error: Missing Dependency: python-abi = 2.3 is needed by package python-elementtree
 
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</pre>
 
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and/or
 
 
<pre>
 
<pre>
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warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897
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cd
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Public key for libsepol-1.15.2-3.el5.i386.rpm is not installed
 
 
</pre>
 
</pre>
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14 - Start the container
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You need to run the following before trying again:
 
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<pre>
 
<pre>
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vzctl exec $CTID rpm -e --justdb python-elementtree --nodeps
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vzctl start CTID
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vzctl exec $CTID rpm --import http://mirrors.kernel.org/centos/RPM-GPG-KEY-CentOS-5
 
 
</pre>
 
</pre>
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15 - Remove container IP
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==Test your VE==
 
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Check you can enter your VE:
 
 
<pre>
 
<pre>
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vzctl enter $CTID
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vzctl set --ipdel container_IP
 
</pre>
 
</pre>
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16 - Stop container
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All went OK? Exit the VE:
 
 
<pre>
 
<pre>
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exit
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vzctl stop CTID
 
</pre>
 
</pre>
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17 - Create the template
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===Troubleshooting===
 
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<pre>
 
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Unable to open pty: No such file or directory
 
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</pre>
 
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If you see errors like this, see the [[VPS_enter_failed]] article.
 
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==Stop your VE==
 
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<pre>
 
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vzctl stop $CTID
 
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</pre>
 
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==Restore dev==
 
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This will replace the new /dev/ with the old one:
 
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<pre>
 
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mv /vz/private/$CTID/dev /vz/private/$CTID/dev.old
 
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tar -xvf $CTID.dev.tar -C /vz/private/$CTID
 
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</pre>
 
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== Remove container IP ==
 
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<pre>
 
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vzctl set $CTID --ipdel all --save
 
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</pre>
 
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==Create the template==
 
 
<pre>
 
<pre>
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cd /vz/private/$CTID
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cd /vz/private/CTID
 
tar --numeric-owner -zcf /vz/template/cache/centos-5.5-i386-minimal.tar.gz .
 
tar --numeric-owner -zcf /vz/template/cache/centos-5.5-i386-minimal.tar.gz .
 
</pre>
 
</pre>

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