feat: deploy cobbler enc

- install python3.11 on all nodes
- create python3.11 venv for cobbler-enc
- install requirements in cobbler-enc venv
- symlink to /usr/local/bin/

site/profiles/templates/puppet/server/cobbler-enc.erb

@@ -0,0 +1,46 @@
+#!<%= @venv_path %>/bin/python
+"""
+External Node Classifier (ENC) for Puppet.
+
+If the environment specified in the YAML file is 'testing',
+the environment is not included in the output.
+"""
+
+import sys
+import yaml
+import requests
+
+def fetch_enc_data(cobbler_url: str, hostname: str) -> str:
+    """
+    Fetches and modifies ENC data from a given URL to ensure classes are in list format.
+    """
+    url = f"{cobbler_url}/cblr/svc/op/puppet/hostname/{hostname}"
+    try:
+        response = requests.get(url, verify='<%= @trusted_ca_cert %>')
+        response.raise_for_status()
+    except requests.RequestException as e:
+        sys.exit(f"Request failed: {e}")
+
+    data = yaml.safe_load(response.text)
+    data["parameters"] = data.get("parameters", {})
+
+    # Ensure 'classes' is in the desired list format
+    if "classes" in data:
+        if isinstance(data["classes"], dict):
+            data["parameters"]["enc_role"] = list(data["classes"].keys())
+            data["classes"] = list(data["classes"].keys())
+        else:
+            data["parameters"]["enc_role"] = list(data["classes"])
+            data["classes"] = list(data["classes"])
+
+    if "environment" in data:
+        data["parameters"]["enc_env"] = data["environment"]
+        if data["environment"] == "testing":
+            del data["environment"]
+
+    return yaml.dump(data)
+
+if __name__ == "__main__":
+    if len(sys.argv) != 2:
+        sys.exit(f"Usage: {sys.argv[0]} <hostname>")
+    print(fetch_enc_data("<%= @cobbler_base_url %>", sys.argv[1]))