Chapter 6. Rerunning cloud-init on a virtual machine

Procedure

1. Log in to your VM.
2. Add or change directives, for example, modify the cloud.cfg file in the /etc/cloud directory or add directives to the /etc/cloud/cloud.cfg.d directory.
3. Run the cloud-init clean command to clean directories so that cloud-init can rerun.

4. Run the following commands as root to clean the VM data:

   rm -Rf /var/lib/cloud/instances/
   rm -Rf /var/lib/cloud/instance
   rm -Rf /var/lib/cloud/data/

   Note

   You can save the cleaned image as a template image and use that image for multiple VMs. The new VMs will use the updated configuration to run cloud-init.

5. Rerun cloud-init or reboot the VM to implement the configuration changes you made. For details on re-running cloud-init, see Re-run cloud-init.

Procedure

1. Create and launch an instance for the Red Hat OpenStack Platform. For information about creating instances for Red Hat OpenStack Platform, see Creating an instance. In this example, the virtual machine (VM) includes cloud-init, which runs upon boot of the VM.
2. Add or change directives. For example, modify the user-data.file file that is stored on the OpenStack HTTP server.

3. Clean the virtual machine:

   # rm -rf /etc/resolv.conf /run/cloud-init
   # userdel -rf cloud-user
   # hostnamectl set-hostname localhost.localdomain
   # rm /etc/NetworkManager/conf.d/99-cloud-init.conf

   Note

   You can save the cleaned image as a template image and use that image for multiple virtual machines. The new virtual machines run cloud-init, using your updated cloud-init configuration.

4. Rerun cloud-init or reboot the VM to implement the configuration changes you made. For details on re-running cloud-init, see Re-run cloud-init.