docs: add manual aws modification steps
@@ -257,6 +257,37 @@ Listing Clusters
- AWS profile used for deploying cluster resources.
- default
+.. _aws-modifying-deployment:
+
+************************
+ Modifying a Deployment
+************************
+
+To modify an already deployed cluster you have a few options:
+
+1. If what you'd like to change is provided as a ``det deploy`` CLI
+option, you can re-deploy the cluster using ``det deploy``. Use the same
+full ``det deploy`` command as on cluster creation, but update the
+options as necessary, while keeping the ``cluster-id`` the same. ``det
+deploy`` would then find the existing cluster, take it down and spin up
+a new one with the updated options.
+
+2. If you want more control over the master configuration while
+minimizing the downtime, you can ssh into the master instance using the
+private key from the keypair that was used to provision the cluster.
+Once you're successfully connected, you can modify ``master.yaml`` under
+``/usr/local/determined/etc`` and restart the master docker container
+for your changes to take effect :
+
+.. code:: bash
+
+ sudo docker container restart determined-master
+
+For example, if you want to add or modify resource pools you can edit
+the master configuration file at
+``/usr/local/determined/etc/master.yaml`` and add a new resource pool
+entry.
+
.. _aws-manual-deployment:
*******************
