From 903b6658d85d2016685a04424345edc3ddcb6ea3 Mon Sep 17 00:00:00 2001
From: Tom Clegg <tom@curii.com>
Date: Mon, 25 Apr 2022 14:17:45 -0400
Subject: [PATCH] 18794: Export current version as metric (Go services only).

Arvados-DCO-1.1-Signed-off-by: Tom Clegg <tom@curii.com>
---
 lib/service/cmd.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/service/cmd.go b/lib/service/cmd.go
index 6f5efa5cb7..063ff9f6ee 100644
--- a/lib/service/cmd.go
+++ b/lib/service/cmd.go
@@ -119,6 +119,15 @@ func (c *command) RunCommand(prog string, args []string, stdin io.Reader, stdout
 	reg := prometheus.NewRegistry()
 	loader.RegisterMetrics(reg)
 
+	// arvados_version_running{version="1.2.3~4"} 1.0
+	mVersion := prometheus.NewGaugeVec(prometheus.GaugeOpts{
+		Namespace: "arvados",
+		Name:      "version_running",
+		Help:      "Indicated version is running.",
+	}, []string{"version"})
+	mVersion.WithLabelValues(cmd.Version.String()).Set(1)
+	reg.MustRegister(mVersion)
+
 	handler := c.newHandler(ctx, cluster, cluster.SystemRootToken, reg)
 	if err = handler.CheckHealth(); err != nil {
 		return 1
-- 
2.30.2