From d3ac6703c69de146609b94fe23c5ae456b3de644 Mon Sep 17 00:00:00 2001
From: "Peter J. Holzer" <hjp@hjp.at>
Date: Tue, 6 Feb 2024 11:45:21 +0100
Subject: [PATCH] Record postgresql version

---
 clients/record_postgresql_version | 36 +++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100755 clients/record_postgresql_version

diff --git a/clients/record_postgresql_version b/clients/record_postgresql_version
new file mode 100755
index 0000000..4ad2be5
--- /dev/null
+++ b/clients/record_postgresql_version
@@ -0,0 +1,36 @@
+#!/usr/bin/python3
+import re
+import subprocess
+import time
+
+import ltsdb_record
+
+p = subprocess.run(["psql", "-c", "select version()", "-A", "-t", "-X", "-q",],
+                   stdout=subprocess.PIPE, universal_newlines=True)
+
+# This works only for PostgreSQL 10.x and above. I don't expect to encounter
+# older versions any more.
+m = re.match(r"^PostgreSQL (\d+).(\d+) ", p.stdout)
+if m:
+    version = int(m.group(1)) + int(m.group(2)) / 100
+
+report0 = []
+report0.append({ "measure": "postgresql_version", "unit": "version", "value":
+version})
+now = time.time()
+report = [
+    {
+        "description": {
+            "hostname": ltsdb_record.node,
+            "measure": r["measure"],
+            "unit": r["unit"]
+        },
+        "data": [
+            [now, r["value"]]
+        ]
+    }
+    for r in report0
+]
+
+success = ltsdb_record.record_observations(report)
+exit(1 - success)