terraform: openstack node groups (#1966)

* openstack

* rename to base_name

* fix openstack boot vtpm

* add docs for accessing bootstrapper logs

* rename to initial count

dev-docs/workflows/debug-cluster.md

@@ -0,0 +1,57 @@
+# Debug cluster
+
+A debug cluster allows quicker iteration cycles during development by being able to upload new bootstrapper binaries through the `cdbg` tool.
+Furthermore, a debug cluster allows you to access the bootstrapper logs through the cloud providers serial console.
+
+## Creating a debug cluster
+
+After building (see [here](./build-develop-deploy.md#build)), you can find all CLIs and binaries in the `build` directory.
+
+The cluster creation mostly follows the [official docs instructions](https://docs.edgeless.systems/constellation/getting-started/first-steps), but varies slightly in the following steps:
+
+`./constellation config generate <CSP>`
+by default uses the referenced nightly image.
+To replace them with the latest debug image, run
+
+```sh
+bazel run //internal/api/versionsapi/cli -- latest --ref main --stream debug
+```
+
+to fetch the latest version and insert in the `image` field of the config file.
+
+Before cluster creation you need to configure the cluster as debug.
+Set `debugCluster: true` in the config:
+
+```sh
+yq eval -i '.debugCluster=true' constellation-conf.yaml
+```
+
+Fetch measurements for the debug image:
+
+```sh
+./constellation config fetch-measurements --insecure
+```
+
+Create the cluster and deploy the debug images:
+
+```sh
+./constellation create ...
+```
+
+```sh
+./cdbg deploy
+```
+
+Finally run:
+
+```sh
+./constellation init
+```
+
+## Access bootstrapper logs
+
+Once logged in to the control-plane machine, execute:
+
+```sh
+journalctl -fu constellation-bootstrapper
+```