From 7325372375324ff6818a5a98ce4f89ff1e412bdb Mon Sep 17 00:00:00 2001
From: Colin Adler <colin1adler@gmail.com>
Date: Fri, 4 Nov 2022 14:48:19 -0500
Subject: [PATCH] fix: use prometheus default registry

Using a custom registry got rid of all of the default runtime metrics.
---
 cli/server.go    | 10 ++++------
 coderd/coderd.go |  8 ++++----
 2 files changed, 8 insertions(+), 10 deletions(-)

diff --git a/cli/server.go b/cli/server.go
index 8a8e4998db5d7..24500e7d2c287 100644
--- a/cli/server.go
+++ b/cli/server.go
@@ -505,23 +505,21 @@ func Server(vip *viper.Viper, newAPI func(context.Context, *coderd.Options) (*co
 				defer serveHandler(ctx, logger, nil, cfg.Pprof.Address.Value, "pprof")()
 			}
 			if cfg.Prometheus.Enable.Value {
-				options.PrometheusRegistry = prometheus.NewRegistry()
-				closeUsersFunc, err := prometheusmetrics.ActiveUsers(ctx, options.PrometheusRegistry, options.Database, 0)
+				options.PrometheusRegisterer = prometheus.DefaultRegisterer
+				closeUsersFunc, err := prometheusmetrics.ActiveUsers(ctx, options.PrometheusRegisterer, options.Database, 0)
 				if err != nil {
 					return xerrors.Errorf("register active users prometheus metric: %w", err)
 				}
 				defer closeUsersFunc()
 
-				closeWorkspacesFunc, err := prometheusmetrics.Workspaces(ctx, options.PrometheusRegistry, options.Database, 0)
+				closeWorkspacesFunc, err := prometheusmetrics.Workspaces(ctx, options.PrometheusRegisterer, options.Database, 0)
 				if err != nil {
 					return xerrors.Errorf("register workspaces prometheus metric: %w", err)
 				}
 				defer closeWorkspacesFunc()
 
 				//nolint:revive
-				defer serveHandler(ctx, logger, promhttp.InstrumentMetricHandler(
-					options.PrometheusRegistry, promhttp.HandlerFor(options.PrometheusRegistry, promhttp.HandlerOpts{}),
-				), cfg.Prometheus.Address.Value, "prometheus")()
+				defer serveHandler(ctx, logger, promhttp.Handler(), cfg.Prometheus.Address.Value, "prometheus")()
 			}
 
 			// We use a separate coderAPICloser so the Enterprise API
diff --git a/coderd/coderd.go b/coderd/coderd.go
index 43ae621be144b..14910a6381c05 100644
--- a/coderd/coderd.go
+++ b/coderd/coderd.go
@@ -78,7 +78,7 @@ type Options struct {
 	GoogleTokenValidator *idtoken.Validator
 	GithubOAuth2Config   *GithubOAuth2Config
 	OIDCConfig           *OIDCConfig
-	PrometheusRegistry   *prometheus.Registry
+	PrometheusRegisterer prometheus.Registerer
 	SecureAuthCookie     bool
 	SSHKeygenAlgorithm   gitsshkey.Algorithm
 	Telemetry            telemetry.Reporter
@@ -132,8 +132,8 @@ func New(options *Options) *API {
 	if options.Authorizer == nil {
 		options.Authorizer = rbac.NewAuthorizer()
 	}
-	if options.PrometheusRegistry == nil {
-		options.PrometheusRegistry = prometheus.NewRegistry()
+	if options.PrometheusRegisterer == nil {
+		options.PrometheusRegisterer = prometheus.NewRegistry()
 	}
 	if options.TailnetCoordinator == nil {
 		options.TailnetCoordinator = tailnet.NewCoordinator()
@@ -204,7 +204,7 @@ func New(options *Options) *API {
 		httpmw.Recover(api.Logger),
 		httpmw.ExtractRealIP(api.RealIPConfig),
 		httpmw.Logger(api.Logger),
-		httpmw.Prometheus(options.PrometheusRegistry),
+		httpmw.Prometheus(options.PrometheusRegisterer),
 		// handleSubdomainApplications checks if the first subdomain is a valid
 		// app URL. If it is, it will serve that application.
 		api.handleSubdomainApplications(