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InstanceMigration

Revision as of 06:46, 3 September 2010 by JesseAndrews (talk)
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Summary

Develop a feature to allow cloud administrators to perform maintenance tasks of physical servers. This feature will allow admins to shutdown an instance and move it to a new host node.

Release Note

An internal admin tool to move instances from a compute node has been added to OpenStack compute.

Rationale

Hardware fails. A user's instance shouldn't be permanently lost when hardware must be removed from the pool.

User stories

A member of the operations team notices that the hardware on a server is failing. To protect the users, the instances are migrated and the system is sent to the datacenter team.

Assumptions

  • more than one node exists
  • compute nodes are able to rsync/scp between each other -- or the image is moved to the object store.

Implementation

a nova-manage command will be added that:

  • shutdown the instance
  • determines a new server to migrate the instance (via the scheduler)
  • the compute node that receives the run command retrieves the image from the existing server.
  • the network configuration is kept the same, and the new VM is restarted

Test/Demo Plan