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--- archive_xen [2007/03/15 13:57] – /* Booting and Shutting Down */ mediawiki_default
+++ archive_xen [2026/09/27 00:52] (current) – removed - external edit (Unknown date) 127.0.0.1
@@ Line 1: / Line 1: @@
-====== Overview ======
-  *  We have two P4 PCs, [[vislor]] and [[adric]], running Xen 3.0.1.
-  *  They run Fedora core 5 dom0s with Fedora's Xen-patched kernels (version 2.6.15).
-  *  As neither machine has space for more than one hard disk, the systems use DRBD to provide data redundancy.
-  *  [[vislor]] (P4 1.7GHz/768MB/40GB) is intended to run domUs for production services as it is the most powerful of the two.
-  *  [[adric]] (P4 1.6GHz/512MB/60GB) runs testing or sandbox domUs, may be used to test new versions of Xen, and provides a mirror of the production domUs' root filesystems.
-====== OS Setup ======
-The unpopular decision to run Fedora core on [[vislor]] and [[adric]] was made based on its excellent Xen packaging and the poor state of the Debian Xen-patched kernels. --Pert 12:40, 20 October 2006 (BST)
-In order to document the installation and to provide an easy way for the boxes to be re-installed by others I used kickstart scripts; available here (only accessable from tardis):
-  *  http://packages.tardis.ed.ac.uk/fedora/ks-vislor.cfg
-  *  http://packages.tardis.ed.ac.uk/fedora/ks-adric.cfg
-====== Disk Setup ======
-**Vislor:**
-  *  hda1: 4GB ext3 /
-  *  hda2: 30GB DRBD-PV (drbd0)
-  *  hda3: ~3GB LVM-PV (swaps VG)
-  *  hda4: 512MB swap
-  *  drbd0: 30GB LVM-PV (prod-roots VG)
-**Adric:**
-  *  hda1: 4GB ext3 /
-  *  hda2: 30GB DRBD-PV (drbd0)
-  *  hda3: 512MB swap
-  *  hda5: 20GB LVM-PV (test-roots VG)
-  *  hda6: ~3GB LVM-PV (swaps VG)
-====== How to build DRBD for Fedora ======
-<code>yum install make gcc flex bison rpm-build kernel-xen0-devel
-wget http://oss.linbit.com/drbd/0.7/drbd-0.7.21.tar.gz
-tar -xzvf drbd-0.7.21.tar.gz
-cd drbd-0.7.21/
-patch <<'END'
---- drbd.spec.in.orig   2006-10-19 11:05:09.000000000 +0100
-+++ drbd.spec.in        2006-10-19 11:05:45.000000000 +0100
-@@ -64,9 +64,9 @@
- %prep
- %setup
- test -d %{kdir}/.
--test $(echo -e "#include <linux/version.h>\ndrbd_kernel_release UTS_RELEASE" |
--       gcc -nostdinc -E -P -I%{kdir}/include - |
--       sed -ne 's/^drbd_kernel_release "\(.*\)".*/\1/p') = %{kernelversion}
-+#test $(echo -e "#include <linux/version.h>\ndrbd_kernel_release UTS_RELEASE" |
-+#       gcc -nostdinc -E -P -I%{kdir}/include - |
-+#       sed -ne 's/^drbd_kernel_release "\(.*\)".*/\1/p') = %{kernelversion}
- %build
- echo kernelversion=%{kernelversion}
-END
-make rpm
-</code>
-====== How to Add New Instances ======
-Login to leela, and add the new box to /etc/bind/db.tardis and /etc/bind/db.193.62.81. Use co -l to check out the files and ci -u -wusername to log it back in. Remember to update the serial number. See the [[dns_service]] page.
-Login to vislor, which is the main xen machine. Use the mkdomU.bash script to create the new instance like so:
-<code>
-mkdomU.bash -vh <newmachinename>
-</code>
-Say yes to shadow passwords, type in root password (twice), say no to creating a user account.
-If you want to do something complicated, have a look at /etc/mkdomU.conf, or at the script at /usr/local/bin/mkdomU.bash .
-Don't forget to unmount the domU filesystem!
-<code>
-umount /mnt/mkdomU
-</code>
-Run
-<code>
-xm create -c <newmachinename>.conf
-</code>
-to get the instance up and running. You should be able to log in.  Use ctrl+] to get back to vislor's console.
-====== Booting and Shutting Down ======
-Xen's init scripts are set up to perform an `xm save` (copy the RAM to disk) for each domU that's running when vislor and/or adric are shut down and to restore saved domUs on boot.  This should take care of the cases where tardis is shut down intentionally, but a bit more work will have to be done following an unexpected power loss.  (When do they happen anyway? ;-)
-To start all domUs on vislor do:
-  for foo in /etc/xen/*.conf; do xm create -c $foo; done
-  <WAIT FOR A LOGIN PROMPT>
-  ctrl+]
-  <WAIT FOR A LOGIN PROMPT>
-  ctrl+]
-  ....