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Cold migration for instances created on ephemeral storage
With cold migration instance will be rebooted
E.g. to migrated instance with UUID e1914906-7e33-4d30-88f0-785130fdd85d to the compute node cld-np-14:
| Code Block | ||
|---|---|---|
| ||
nova migrate e1914906-7e33-4d30-88f0-785130fdd85d --host cld-np-14.cloud.pd.infn.it |
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If source and target hypervisor aren't compatible, you will get an error message. In this case find another compatible target hypervisor or use cold migration (see above).
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Troubleshooting
If source and target compute nodes have different settings for SELINUX (e.g. 'disabled' vs 'permissive') live migration will fail. No errors will be reported when issuing the command and no errors will be reported in the output of "openstack server event list <uuid> command". In the nova log of the compute node you will see something like:
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