prometheus: replace default port by a port between the recommended prometheus range

cmd/headscale/headscale_test.go

@@ -55,7 +55,7 @@ func (*Suite) TestConfigLoading(c *check.C) {
 	// Test that config file was interpreted correctly
 	c.Assert(viper.GetString("server_url"), check.Equals, "http://127.0.0.1:8080")
 	c.Assert(viper.GetString("listen_addr"), check.Equals, "0.0.0.0:8080")
-	c.Assert(viper.GetString("metrics_listen_addr"), check.Equals, "127.0.0.1:8081")
+	c.Assert(viper.GetString("metrics_listen_addr"), check.Equals, "127.0.0.1:9915")
 	c.Assert(viper.GetString("db_type"), check.Equals, "sqlite3")
 	c.Assert(viper.GetString("db_path"), check.Equals, "/var/lib/headscale/db.sqlite")
 	c.Assert(viper.GetString("tls_letsencrypt_hostname"), check.Equals, "")

config-example.yaml

@@ -20,7 +20,7 @@ listen_addr: 0.0.0.0:8080
 # to keep this endpoint private to your internal
 # network
 #
-metrics_listen_addr: 127.0.0.1:8081
+metrics_listen_addr: 127.0.0.1:9915
 
 # Address to listen for gRPC.
 # gRPC is used for controlling a headscale server

docs/examples/kustomize/base/configmap.yaml

@@ -5,5 +5,5 @@ metadata:
 data:
   server_url: $(PUBLIC_PROTO)://$(PUBLIC_HOSTNAME)
   listen_addr: "0.0.0.0:8080"
-  metrics_listen_addr: "127.0.0.1:8081"
+  metrics_listen_addr: "127.0.0.1:9915"
   ephemeral_node_inactivity_timeout: "30m"

integration_test/etc/config.yaml

@@ -14,7 +14,7 @@ dns_config:
 db_path: /tmp/integration_test_db.sqlite3
 private_key_path: private.key
 listen_addr: 0.0.0.0:8080
-metrics_listen_addr: 127.0.0.1:8081
+metrics_listen_addr: 127.0.0.1:9915
 server_url: http://headscale:8080
 
 derp: