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solution not workaround!
This article contents describes known reasons of migration failures, and solutions for those.
== Problem #1 ==
loaded on destination node. Consequently <tt>iptables-restore</tt> fails.
=== Workaround Solution ===
Load all iptables kernel modules that are used by VE on destination node.
=== Links ===
* http://bugzilla.openvz.org/show_bug.cgi?id={{bug|631}}
* http://forum.openvz.org/index.php?t=tree&th=2756&mid=14198&&rev=&reveal=
supported by <tt>028stab031</tt> and older kernels.
=== Workaround Solution ===
* for 2.6.18 rhel5 based kernels: Update till <tt>028stab035</tt> or newer kernel
* for 2.6.18 mainstream based kernels: Update till <tt>028stab043</tt> or newer kernel
=== Links ===
* http://bugzilla.openvz.org/show_bug.cgi?id={{bug|552}}
* http://forum.openvz.org/index.php?t=tree&goto=14780&#msg_14780
Checkpointing doesn't support <tt>tun</tt> device inside VE till <tt>2.6.18-028stab049</tt> and <tt>2.6.9-023stab044.14</tt> kernels. This device is usually used for [[VPN via the TUN/TAP device]] in VE.
=== Workaround Solution ===
* for 2.6.18 based kernels: update till <tt>028stab049</tt> or newer kernel
* for 2.6.9 based kernels: update till <tt>023stab044.14</tt> or newer kernel
=== Links ===
* http://bugzilla.openvz.org/show_bug.cgi?id={{Bug|642}}
* http://forum.openvz.org/index.php?t=tree&goto=14826&#msg_14826
[[Category:Troubleshooting]]
