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Stack2Stack

stack2stack is a simple python script to aid data migration from one Openstack cloud to another through use of the APIs. It aims to cleanly migrate the data keeping as much in sync as possible, up to the limitations of the Openstack APIs themselves. Currently the script migrates

  • Keystone Users
  • Keystone Tenants
  • Keystone roles
  • Keystone Tenant Memberships
  • Glance Images
  • Networks from nova networking to neutron
  • Security groups from nova networking to neutron

How to use

Simply edit the top of the stack2stack.py file, defining the credentials of the two openstack clouds you wish to use in the migration (old_cloud_* are the source cloud, new_cloud_* are the target cloud). Then simply run

python -u stack2stack.py | tee stack2stack.log

This will run the migration and capture the output to stdout and the log file stack2stack.log

Limitations

Currently stack2stack has the following limitations, some of which are slowly being addressed

  • As the api offers no way to expose the underlying cinder volumes, cinder volumes are not migrated
  • As the APIs do not expose users passwords, currently each user account in the new cloud has their password reset (and is printed in the log)
  • No support for migration neutron-to-neutron networks (yet)