Add agent version

pgmon.py

@@ -17,6 +17,8 @@ from http.server import BaseHTTPRequestHandler, HTTPServer
 from http.server import ThreadingHTTPServer
 from urllib.parse import urlparse, parse_qs
 
+VERSION = '0.1.0'
+
 # Configuration
 config = {}
 
@@ -201,6 +203,10 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
         name = parsed_path.path.strip('/')
         parsed_query = parse_qs(parsed_path.query)
 
+        if name == 'agent_version':
+            self._reply(200, f"{VERSION}")
+            return
+
         # Note: Parse_qs returns the values as a list.  Since we always expect
         #       single values, just grab the first from each.
         args = {key: values[0] for key, values in parsed_query.items()} 
@@ -210,7 +216,7 @@ class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
             metric = config['metrics'][name]
         except KeyError:
             log.error(f"Unknown metric: {name}")
-            self.wfile.write(bytes('Unknown metric', 'utf-8'))
+            self._reply(404, 'Unknown metric')
             return
 
         # Get the dbname

pgmon_templates.yaml

@@ -11,6 +11,21 @@ zabbix_export:
       groups:
         - name: 'My Templates'
       items:
+        - uuid: 763920af8da84db8a9a2667d9653cb21
+          name: 'PostgreSQL Agent Version'
+          key: 'web.page.get[localhost,/agent_version,{$AGENT_PORT}]'
+          delay: 1h
+          history: 90d
+          value_type: TEXT
+          description: 'PostgreSQL monitoring agent version number'
+          preprocessing:
+            - type: REGEX
+              parameters:
+                - '\n\s?\n([\s\S]*)'
+                - \1
+          tags:
+            - tag: Application
+              value: PostgreSQL
         - uuid: 8706eccb7edc4fa394f552fc31f401a9
           name: 'Max Frozen XID Age'
           key: 'web.page.get[localhost,/max_frozen_age,{$AGENT_PORT}]'