Installation guide

The command should result in a listing of your new Havana Compute hosts. For
example:
# no va --o s-reg i o n-name Havana ho st-l i st
+-------------------------------------------+----------------
+----------+
| host_name | service
| zone |
+-------------------------------------------+---------------
-+----------+
| rdo-havana-nova-api-net0.default.virt | cert
| internal |
| rdo-havana-nova-api-net0.default.virt | conductor
| internal |
| rdo-havana-nova-api-net0.default.virt | consoleauth
| internal |
| rdo-havana-nova-api-net0.default.virt | scheduler
| internal |
| rdo-havana-nova-compute-net0.default.virt | compute_havana
| internal |
+-------------------------------------------+---------------
-+----------+
3.4 .2. Move inst ances t o t he new environment
1. Migrate instances from the Grizzly environment to the Havana Compute nodes. The simplest
method for 'migrating' an instance is to simply stop the instance running in your Grizzly
environment and deploy a new one on the Havana infrastructure.
If re-deployment is not an option, you can move instances from your Grizzly compute nodes
to your Havana compute nodes with minimal downtime using the following process:
a. Make a snapshot of the existing instance.
b. Delete the existing instance.
c. Boot a new instance on the Havana Compute nodes from the snapshot.
d. Allocate and assign any necessary floating addresses:
In an OpenStack Networking (neutron) environment, re-assign your previously
allocated addresses as soon as the instance to which they were assigned is shut
down.
In a Compute networking environment, you will need to create new floating IP
pools identical to those in your Grizzly environment and then explicitly allocate the
necessary floating IP addresses before assigning them.
To allocate explicit addresses, use the no va fl o ati ng -i p-bul k-create
command.
2. When you are able to move all the instances from one of your existing Grizzly Compute
nodes, you can re-deploy that node in your Havana compute environment.
3. When you have moved all your Compute nodes into the Havana environment, you can retire
any remaining Grizzly Compute services.
Red Hat Ent erprise Linux O penSt ack Plat form 4 Release Not es
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