View source for VScaler: Add/Remove nodes from the environment with Kolla

== Prereqs ==

* Nodes to add should be pre-configured with docker etc.
** Dave has a playbook for this, but kolla has a command for this as well, which is '''<tt>kolla-ansible bootstrap-servers</tt>'''. This command will configure all the existing nodes as well, so needs more investigation to limit it to specific nodes.

== Destroy a configured node ==

Note: Change <tt>gpu07</tt> in the following command to any node that you want to destroy. '''This node has to be in the inventory file'''.

'''For the latest kolla-ansible version you can use:'''
<syntaxhighlight>
kolla-ansible -i ./multinode --limit=gpu07 destroy

# or for multiple nodes
kolla-ansible -I ./multinode --limit="gpu07,gpu08" destroy
</syntaxhighlight>

'''For older kolla-ansible versions the --limit option is not available, so you need to use the fill ansible-playbook command:'''
<syntaxhighlight>
ansible-playbook -i vScaler/deploy/multinode --limit=gpu07 -e @/etc/kolla/globals.yml \
-e @/etc/kolla/passwords.yml -e CONFIG_DIR=/etc/kolla -e action=destroy /usr/share/kolla/ansible/destroy.yml
</syntaxhighlight>

== Add a node ==

* Add the hostname of the node in the inventory file, under any category that you need it to be
* Change <tt>gpu01</tt> in the following command to the node you want to add and run it

'''For the latest kolla-ansible version you can use:'''
<syntaxhighlight>
kolla-ansible -i vScaler/deploy/multinode --limit=gpu07 deploy
</syntaxhighlight>

'''For older kolla-ansible versions the --limit option is not available, so you need to use the fill ansible-playbook command:'''
<syntaxhighlight>
ansible-playbook -i vScaler/deploy/multinode --limit=gpu01 -e @/etc/kolla/globals.yml \
-e @/etc/kolla/passwords.yml -e CONFIG_DIR=/etc/kolla -e action=deploy /usr/share/kolla/ansible/site.yml
</syntaxhighlight>