Add ansible and playbook to trigger upgrade

inventory

@@ -0,0 +1,31 @@
+#!/usr/bin/env python
+
+import json
+import subprocess
+
+IGNORED_HOSTS = [
+    "inc1",
+    "inc2",
+    "media1",
+    "nixos-test1",
+    "ns3",
+    "ns4",
+    "template1",
+]
+
+result = subprocess.run(["nix", "flake", "show", "--json"], stdout=subprocess.PIPE, stderr=subprocess.DEVNULL)
+results = json.loads(result.stdout)
+
+configs = results.get("nixosConfigurations")
+hosts = [x for x in configs.keys() if x not in IGNORED_HOSTS]
+
+output = {
+    "all": {
+        "hosts": hosts,
+        "vars": {
+            "ansible_python_interpreter": "/run/current-system/sw/bin/python3"
+        },
+    }
+}
+
+print(json.dumps(output))