When deploying an instance, sometimes an error occurs and deployment fails. If this happens with a new deployment, usually it is simplest to delete the failed instance and deploy again. However, if you must fix the broken instance, there is a nova rescue command that will help you. This section explains how to use the nova rescue command to fix broken instances.
If you are using the Vagrant environment, these steps are to be carried out on our network node under the user that has access to our OpenStack Compute credentials (as created in the Installation of command-line tools on network recipe).
Ensure that you are logged onto the network node and that it has Internet access to allow us to install the required packages in our environment for running OVS and Neutron. If you created this node with Vagrant, you can execute the following command:
vagrant ssh network