From 69201f4d314debbb79ca16902e203c2c4987e822 Mon Sep 17 00:00:00 2001
From: joffrey-bion <joffrey.bion@gmail.com>
Date: Wed, 17 Feb 2021 03:06:09 +0100
Subject: Attempt at better "instance" variable for metrics

---
 .../kotlin/org/luxons/sevenwonders/server/SevenWonders.kt  | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

(limited to 'sw-server')

diff --git a/sw-server/src/main/kotlin/org/luxons/sevenwonders/server/SevenWonders.kt b/sw-server/src/main/kotlin/org/luxons/sevenwonders/server/SevenWonders.kt
index 923ebcb5..93ff0be7 100644
--- a/sw-server/src/main/kotlin/org/luxons/sevenwonders/server/SevenWonders.kt
+++ b/sw-server/src/main/kotlin/org/luxons/sevenwonders/server/SevenWonders.kt
@@ -21,7 +21,19 @@ class SevenWonders {
     fun metricsCommonTags(): MeterRegistryCustomizer<MeterRegistry>? = MeterRegistryCustomizer { registry ->
         registry.config()
             .commonTags("application", "seven-wonders")
-            .commonTags("instance", InetAddress.getLocalHost().hostAddress)
+            .commonTags("instance", findInstanceName())
+    }
+
+    private fun findInstanceName(): String? {
+        val hostname = System.getenv("HOSTNAME")?.takeIf { it.isNotBlank() }
+        if (hostname != null) {
+            return hostname
+        }
+        val computerName = System.getenv("COMPUTERNAME")?.takeIf { it.isNotBlank() }
+        if (computerName != null) {
+            return computerName
+        }
+        return InetAddress.getLocalHost().hostName
     }
 }
 
-- 
cgit