Set up Ansible homelab infrastructure

- Inventory based on tailscale
- Structure of the project

inventory/tailscale_inventory.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+"""
+Dynamic Ansible inventory via local tailscale status.
+Only includes peers tagged with tag:homelab.
+Groups: online, offline, <os>
+"""
+
+import json
+import subprocess
+
+FILTER_TAG = "tag:homelab"
+
+
+def run():
+    raw = subprocess.check_output(["tailscale", "status", "--json"])
+    data = json.loads(raw)
+
+    inv = {
+        "_meta": {"hostvars": {}},
+        "all": {"hosts": [], "children": ["online", "offline"]},
+        "online": {"hosts": []},
+        "offline": {"hosts": []},
+    }
+
+    for peer in data.get("Peer", {}).values():
+        # Filtre sur le tag
+        tags = peer.get("Tags") or []
+        if FILTER_TAG not in tags:
+            continue
+
+        name = peer["HostName"]
+        ip = peer["TailscaleIPs"][0]
+        up = peer.get("Online", False)
+
+        inv["all"]["hosts"].append(name)
+        inv["online" if up else "offline"]["hosts"].append(name)
+
+        inv["_meta"]["hostvars"][name] = {
+            "ansible_host": ip,
+        }
+
+    print(json.dumps(inv, indent=2))
+
+
+if __name__ == "__main__":
+    run()