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--- cn:ccr:virtualizzazione:documentazione:xen_live_migration [2009/07/07 14:46] – created chierici@cnaf.infn.it
+++ cn:ccr:virtualizzazione:documentazione:xen_live_migration [2009/07/07 14:47] (current) – chierici@cnaf.infn.it
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+===== XEN live migration Howto =====
+==== Pre-requisite ====
+SL5.2 x86_64 vanilla.
+==== Steps ====
+Live migration allows to move a machine seamlessly from a node to another, without the need to reboot.
+Of course a shared filesystem has to be available to both dom0 in order to access the domU disk image.
+In order to enable live migration on xen domUs you should install the following rpms (updated to the 8th Sep 2008):
+\\
+\\
+SL 5.2 repo:
+  kernel-xen-2.6.18-92.1.10.el5.x86_64
+  virt-viewer-0.0.2-2.el5.x86_64
+  virt-manager-0.5.3-8.el5.x86_64
+\\
+----
+\\
+XEN repo (see later):
+  xen-libs-3.3.0-2.x86_64
+  xen-3.3.0-2.x86_64
+  libvirt-0.4.4-3.x86_64
+  libvirt-python-0.4.4-3.x86_64
+  python-virtinst-0.300.2-8.sl.noarch
+\\
+----
+\\
+DAG repo:
+  qemu-0.9.1-1.el5.rf.x86_64
+\\
+----
+\\
+The XEN repo can be found at this address:\\
+www.gitco.de/repo/xen3.3.0
+**It is very important that you use these very versions (or maybe following ones), not any below the specified ones. Several testing has already been done with previous versions without any luck.**
+After this you should edit the file /etc/xen/xend-config.sxp modifying the following lines as described:
+  (xend-relocation-server yes)
+  (xend-relocation-port 8002)
+  (xend-relocation-address ' ')
+  (xend-relocation-hosts-allow ' ')
+After **restarting** the **xend** service, you are ready to start your VM and once it's running, you can issue the following command:
+  xm migrate -l <domU_name> <destination_dom0>