Fedora template update - Revision history

Nik.martin: /* Creating/starting a temporary container */

2009-01-31T02:38:20Z

‎Creating/starting a temporary container

Nik.martin: added nameserver instruction

2009-01-31T02:38:04Z

added nameserver instruction

Gjanssens: VE->container

2008-02-26T11:12:52Z

VE->container

Kir: /* Testing */

2007-11-15T09:12:56Z

‎Testing

Kir: created

2007-11-13T15:24:29Z

created

New page

This article describes the procedure of manual template update, using Fedora template as an example.

This is useful in the case you have some precreated template which is a bit old, and you want to create many VEs based on it. To escape the updating of all those new VEs right after their creation, it makes sense to update the template itself.

The idea is simple: you create a temporary VE, start it, run the update cycle and then pack the results into a tarball. Some caution must be taken in order for this tarball to be clean though.

The below instructions are for updating Fedora 7 template for PPC architecture, using VE IDs 111 and 222 as temporary VEs. Please substitute your own VE IDs and template names.

== Creating/starting a temporary VE ==

You should create a temporary VE first.

# vzctl create 111 --ostemplate fedora-7-ppc-minimal

Next you should assign a proper IP address to it. This IP does not have to be public -- see [[Using NAT for VE with private IPs]].
# vzctl set 111 --ipadd 10.0.0.111 --save

Finally, start your new VE:
# vzctl start 111

== Updating a VE ==

First, enter a VE:
# vzctl enter 111

Check that you can access Internet:
<pre>
# ping -c 1 www.ru
PING www.ru (194.87.0.50) 56(84) bytes of data.
64 bytes from www.ru (194.87.0.50): icmp_seq=1 ttl=56 time=1.92 ms

--- www.ru ping statistics ---
1 packets transmitted, 1 received, 0% packet loss, time 0ms
rtt min/avg/max/mdev = 1.920/1.920/1.920/0.000 ms
</pre>

Next, run the update procedure:
# yum -y update

As this can take a few minutes or even hours, this is good time to go make some coffee.

== Clean up ==

Сlean the yum repository inside a VE to minimize:
# yum clean all

Еxit from a VE and stop it:

# logout
exited from VE 111
# vzctl stop 111

Remove the IP from the VE:
# vzctl set 111 --ipdel all --save

== Packing a new template cache ==

Now, rename or remove the existing template cache:
# mv /vz/template/cache/fedora-7-ppc-minimal.tar.gz /vz/template/cache/fedora-7-ppc-minimal.tar.gz-old

Now create a new tarball:
# cd /vz/private/111
# tar czf /vz/template/cache/fedora-7-ppc-minimal.tar.gz .

Clean up:
# vzctl destroy 111

== Testing ==

First, compare the sizes of the old and the new template caches:
# ls -lh /vz/template/cache/fedora-7-ppc-minimal*
-rw-r--r-- 1 root root 99M 2007-11-13 18:11 /vz/template/cache/fedora-7-ppc-minimal.tar.gz
-rw-r--r-- 1 root root 91M 2007-08-31 02:46 /vz/template/cache/fedora-7-ppc-minimal.tar.gz-old
The sizes should not differ much.

Try to create and start VE made from your new template:
# vzctl create 222 --ostemplate fedora-7-ppc-minimal
# vzctl set 222 --ipadd 10.0.0.222 --save
# vzctl start 222
# vzctl enter 222

Now execute a few basic commands to check VE is fine. Examples are: ps ax, rpm -qa, etc.

Finally, clean up the testing VE:
# vzctl stop 222
# vzctl destroy 222

[[Category: HOWTO]]
[[Category: Templates]]

@@ Line 16: / Line 16: @@
   # vzctl set 111 --ipadd 10.0.0.111 --save
-Then add a nameserver to the [[containter]].  This is necessary so the container and yum can resolve hostnames:
+Then add a nameserver to the [[container]].  This is necessary so the container and yum can resolve hostnames:
   # vzctl set 111 --nameserver <ip addr>

@@ Line 15: / Line 15: @@
 Next you should assign a proper IP address to it. This IP does not have to be public -- see [[Using NAT for VE with private IPs]].
   # vzctl set 111 --ipadd 10.0.0.111 --save
 Finally, start your new [[container]]:

@@ Line 1: / Line 1: @@
 This article describes the procedure of manual template update, using Fedora template as an example.
-This is useful in the case you have some precreated template which is a bit old, and you want to create many VEs based on it. To escape the updating of all those new VEs right after their creation, it makes sense to update the template itself.
+This is useful in the case you have some precreated template which is a bit old, and you want to create many [[container]]s based on it. To escape the updating of all those new [[container]]s right after their creation, it makes sense to update the template itself.
-The idea is simple: you create a temporary VE, start it, run the update cycle and then pack the results into a tarball. Some caution must be taken in order for this tarball to be clean though.
+The idea is simple: you create a temporary [[container]], start it, run the update cycle and then pack the results into a tarball. Some caution must be taken in order for this tarball to be clean though.
-The below instructions are for updating Fedora 7 template for PPC architecture, using VE IDs 111 and 222 as temporary VEs. Please substitute your own VE IDs and template names.
+The below instructions are for updating Fedora 7 template for PPC architecture, using VEIDs 111 and 222 as temporary [[container]]s. Please substitute your own VEIDs and template names.
-== Creating/starting a temporary VE ==
+== Creating/starting a temporary container ==
-You should create a temporary VE first.
+You should create a temporary [[container]] first.
   # vzctl create 111 --ostemplate fedora-7-ppc-minimal
@@ Line 16: / Line 16: @@
   # vzctl set 111 --ipadd 10.0.0.111 --save
-Finally, start your new VE:
+Finally, start your new [[container]]:
   # vzctl start 111
-== Updating a VE ==
+== Updating a container ==
-First, enter a VE:
+First, enter a [[container]]:
   # vzctl enter 111
@@ Line 42: / Line 42: @@
 == Clean up ==
-Сlean the yum repository inside a VE to minimize:
+Сlean the yum repository inside a [[container]] to minimize:
   # yum clean all
-Еxit from a VE and stop it:
+Еxit from a [[container]] and stop it:
   # logout
@@ Line 51: / Line 51: @@
   # vzctl stop 111
-Remove the IP from the VE:
+Remove the IP from the [[container]]:
   # vzctl set 111 --ipdel all --save
@@ Line 74: / Line 74: @@
 The sizes should not differ much.
-Try to create and start VE made from your new template:
+Try to create and start [[container]] made from your new template:
   # vzctl create 222 --ostemplate fedora-7-ppc-minimal
   # vzctl set 222 --ipadd 10.0.0.222 --save
@@ Line 80: / Line 80: @@
   # vzctl enter 222
-Now execute a few basic commands to check VE is fine. Examples are: ps ax, rpm -qa, etc.
+Now execute a few basic commands to check [[container]] is fine. Examples are: ps ax, rpm -qa, etc.
-Finally, clean up the testing VE:
+Finally, clean up the testing [[container]]:
   # vzctl stop 222
   # vzctl destroy 222

@@ Line 85: / Line 85: @@
   # vzctl stop 222
   # vzctl destroy 222
 [[Category: HOWTO]]
 [[Category: Templates]]