27
edits
Changes
improved tar based backup/restore
follow these steps:
==Create the container== Create a container using centos-4-i386-minimal and set a valid nameserver==:
<pre>
vzctl create $CTID --ostemplate centos-4-i386-minimal --config CONFIG_TEMPLATE --ipadd container_IP --hostname tempvzctl set $CTID --nameserver NAMESERVER_IP --save
</pre>
==Install centos-5-release packages==
Use <code>vzctl exec</code> to execute the rpm install command on the container:
<pre>
vzctl exec $CTID rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-notes-5.56-0.i386.rpmrpm -Uvh \ http://mirror.centos.org/centos/5/os/i386/CentOS/centos-release-5-56.el5.centos.1.i386.rpm
</pre>
Note: centos-release-5 depends on notes-package, start with that one.
==Backup your dev== Backup the container /dev/directory, since as initscripts need needs udev and will remove vzdev you'll net need the backup==:
<pre>
tar -cf $CTID.dev.tar .-C /vz/private/$CTID dev
</pre>
==Install initscripts package== Install initscripts package (forced and with no deps)==, as per below:
<pre>
vzctl exec $CTID rpm -Uvh http://mirror.centos.org/centos/5/os/i386/CentOS/initscripts-8.45.3033-21.el5.centos.i386.rpm --force --nodeps
</pre>
Note: If the "transfer failed", go to the [http://mirror.centos.org/centos/5/os/i386/CentOS/ CentOS5 mirror] and find the latest initscripts rpm and use that instead. ==Exit from containerUpdate conf file==<pre>exit</pre>
<pre>
OSTEMPLATE="centos-4-i386-minimal"
</pre>
<pre>
OSTEMPLATE="centos-5-i386-minimal"
</pre>
Alternatively, use the 'sed' command to replace it:<pre>sed -i 's#OSTEMPLATE="centos-4#OSTEMPLATE="centos-5#g' /etc/vz/conf/$CTID.conf</pre> ==Copy existing template from== Copy existing template from:
<pre>
/vz/template/centos/4
</pre>
==Update yum.conf== In /vz/template/centos/45/i386/config/yum.conf change mirrors to CentOS 5 Using sed: <pre>sed -i 's#centos4#centos5#g' /vz/template/centos/5/i386/config/yum.confsed -i 's#CentOS 4#CentOS 5#g' /vz/template/centos/5/i386/config/yum.confsed -i 's#centos/4/#centos/5/#g' /vz/template/centos/5/i386/config/yum.conf</pre> ==Upgrade container packages== db-version will complain, so delete the conflicting database first:<pre>rm -fr /vz/root/$CTID/var/lib/rpm/__*</pre> Now run vzyum to upgrade the contain packages:<pre>vzyum $CTID upgrade</pre> ===Troubleshooting=== If you get this error: <pre>Error: Missing Dependency: python-abi = 2.3 is needed by package python-elementtree</pre> and/or<pre>warning: rpmts_HdrFromFdno: Header V3 DSA signature: NOKEY, key ID e8562897Public key for libsepol-1.15.2-3.el5.i386.rpm is not installed</pre> You need to run the following before trying again:
<pre>
</pre>
==Stop Test your VE==Check you can enter your VE:
<pre>
vzctl stop enter $CTID
</pre>
<pre>
</pre>
==Leave the container private dir (or it will not start)=Troubleshooting===
<pre>
</pre>
If you see errors like this, see the [[VPS_enter_failed]] article.
==Start the containerStop your VE==
<pre>
vzctl start stop $CTID
</pre>
==Remove container IPRestore dev== This will replace the new /dev/ with the old one:
<pre>
</pre>
==Stop Remove containerIP ==
<pre>
vzctl stop set $CTID--ipdel all --save
</pre>
==Create the template==
<pre>
cd /vz/private/$CTID
tar --numeric-owner -zcf /vz/template/cache/centos-5.5-i386-minimal.tar.gz .
</pre>