remove 'make db'

The db-file, essentially providing reverse lookup of classes to host
names, is only used by some Nagios configuration instances and causes
continuing operational headaches in those ops-repos.

It should be kept/refactored to only apply to the monitoring hosts in
the cases where it is used, but we don't want any new ops-repos to use
it hence it should be removed from upstream multiverse.

fabfile/db.py

@@ -1,49 +0,0 @@
-import os
-import yaml
-import re
-
-def _all_hosts():
-   return filter(lambda fn: '.' in fn and not fn.startswith('.') and os.path.isdir(fn),os.listdir("."))
-
-def _load_db():
-   rules = dict()
-   rules_file = "cosmos-rules.yaml";
-   if os.path.exists(rules_file):
-      with open(rules_file) as fd:
-         rules.update(yaml.load(fd))
- 
-   all_hosts = _all_hosts()
-
-   members = dict()
-   for node_name in all_hosts:
-      for reg,cls in rules.iteritems():
-         if re.match(reg,node_name):
-            for cls_name in cls.keys():
-               h = members.get(cls_name,[])
-               h.append(node_name)
-               members[cls_name] = h
-   members['all'] = all_hosts
-
-   classes = dict()
-   for node_name in all_hosts:
-      node_classes = dict()
-      for reg,cls in rules.iteritems():
-         if re.match(reg,node_name):
-            node_classes.update(cls)
-      classes[node_name] = node_classes
-
-   # Sort member lists for a more easy to read diff
-   for cls in members.keys():
-       members[cls].sort()
-
-   return dict(classes=classes,members=members)
-
-_db = None
-def cosmos_db():
-   global _db
-   if _db is None:
-      _db = _load_db()
-   return _db
-
-if __name__ == '__main__':
-   print yaml.dump(cosmos_db())

global/overlay/etc/puppet/cosmos_enc.py

@@ -1,18 +1,37 @@
 #!/usr/bin/env python3
+#
+# Puppet 'External Node Classifier' to tell puppet what classes to apply to this node.
+#
+# Docs: https://puppet.com/docs/puppet/5.3/nodes_external.html
+#
 
-import sys
-import yaml
 import os
 import re
+import sys
+
+import yaml
+
+rules_path = os.environ.get("COSMOS_RULES_PATH", "/etc/puppet")
 
 node_name = sys.argv[1]
 
-db_file = os.environ.get("COSMOS_ENC_DB","/etc/puppet/cosmos-db.yaml")
-db = dict(classes=dict())
+rules = dict()
+for p in rules_path.split(":"):
+    rules_file = os.path.join(p, "cosmos-rules.yaml")
+    if os.path.exists(rules_file):
+        with open(rules_file) as fd:
+            rules.update(yaml.safe_load(fd))
 
-if os.path.exists(db_file):
-   with open(db_file) as fd:
-      db.update(yaml.load(fd))
+found = False
+classes = dict()
+for reg, cls in rules.items():
+    if re.search(reg, node_name):
+        classes.update(cls)
+        found = True
 
-print(yaml.dump(dict(classes=db['classes'].get(node_name,dict()),parameters=dict(roles=db.get('members',[])))))
+if not found:
+   sys.stderr.write(f"{sys.argv[0]}: {node_name} not found in cosmos-rules.yaml\n")
 
+print("---\n" + yaml.dump(dict(classes=classes)))
+
+sys.exit(0)