Detaching volumes from an instance
As Cinder volumes can only be attached to one host at a time, you need to detach it from one instance before attaching it to another. To detach a volume, we use another Nova client option called volume-detach
.
Getting ready
To begin with, ensure you are logged in to the Ubuntu host that has access to Nova client tools. If using the Vagrant environment that accompanies the book, you can access these tools from the controller
node:
vagrant ssh controller
This recipe assumes you have created an openrc
file. To create an openrc
file on each node where you need it, open a text file named openrc
, and add the following contents:
export OS_TENANT_NAME=cookbook export OS_USERNAME=admin export OS_PASSWORD=openstack export ...
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