Merge pull request prometheus#1593 from prometheus/release-1.20

Merge release-1.20 back to main

Author: ArthurSens

CHANGELOG.md

@@ -1,5 +1,13 @@
 ## Unreleased
 
+## 1.20.2 / 2024-08-23
+
+* [BUGFIX] promhttp: Unset Content-Encoding header when data is uncompressed. #1596
+
+## 1.20.1 / 2024-08-20
+
+* [BUGFIX] process-collector: Fixed unregistered descriptor error when using process collector with `PedanticRegistry` on linux machines. #1587
+
 ## 1.20.0 / 2024-08-14
 
 * [CHANGE] :warning: go-collector: Remove `go_memstat_lookups_total` metric which was always 0; Go runtime stopped sharing pointer lookup statistics. #1577
@@ -10,7 +18,7 @@
 * [FEATURE] promhttp: Add experimental support for `zstd` on scrape, controlled by the request `Accept-Encoding` header. #1496
 * [FEATURE] api/v1: Add `WithLimit` parameter to all API methods that supports it. #1544
 * [FEATURE] prometheus: Add support for created timestamps in constant histograms and constant summaries. #1537
-* [FEATURE] process-collectors: Add network usage metrics: `process_network_receive_bytes_total` and `process_network_transmit_bytes_total`. #1555
+* [FEATURE] process-collector: Add network usage metrics: `process_network_receive_bytes_total` and `process_network_transmit_bytes_total`. #1555
 * [FEATURE] promlint: Add duplicated metric lint rule. #1472
 * [BUGFIX] promlint: Relax metric type in name linter rule. #1455
 * [BUGFIX] promhttp: Make sure server instrumentation wrapping supports new and future extra responseWriter methods. #1480

VERSION

@@ -1 +1 @@
-1.20.0
+1.20.2

prometheus/collectors/dbstats_collector_test.go

@@ -21,7 +21,7 @@ import (
 )
 
 func TestDBStatsCollector(t *testing.T) {
-	reg := prometheus.NewRegistry()
+	reg := prometheus.NewPedanticRegistry()
 	{
 		db := new(sql.DB)
 		if err := reg.Register(NewDBStatsCollector(db, "db_A")); err != nil {

prometheus/collectors/go_collector_latest_test.go

@@ -63,7 +63,7 @@ var memstatMetrics = []string{
 }
 
 func TestGoCollectorMarshalling(t *testing.T) {
-	reg := prometheus.NewRegistry()
+	reg := prometheus.NewPedanticRegistry()
 	reg.MustRegister(NewGoCollector(
 		WithGoCollectorRuntimeMetrics(GoRuntimeMetricsRule{
 			Matcher: regexp.MustCompile("/.*"),
@@ -80,7 +80,7 @@ func TestGoCollectorMarshalling(t *testing.T) {
 }
 
 func TestWithGoCollectorDefault(t *testing.T) {
-	reg := prometheus.NewRegistry()
+	reg := prometheus.NewPedanticRegistry()
 	reg.MustRegister(NewGoCollector())
 	result, err := reg.Gather()
 	if err != nil {
@@ -100,7 +100,7 @@ func TestWithGoCollectorDefault(t *testing.T) {
 }
 
 func TestWithGoCollectorMemStatsMetricsDisabled(t *testing.T) {
-	reg := prometheus.NewRegistry()
+	reg := prometheus.NewPedanticRegistry()
 	reg.MustRegister(NewGoCollector(
 		WithGoCollectorMemStatsMetricsDisabled(),
 	))
@@ -157,7 +157,7 @@ func TestGoCollectorAllowList(t *testing.T) {
 		},
 	} {
 		t.Run(test.name, func(t *testing.T) {
-			reg := prometheus.NewRegistry()
+			reg := prometheus.NewPedanticRegistry()
 			reg.MustRegister(NewGoCollector(
 				WithGoCollectorMemStatsMetricsDisabled(),
 				WithGoCollectorRuntimeMetrics(test.rules...),
@@ -219,7 +219,7 @@ func TestGoCollectorDenyList(t *testing.T) {
 		},
 	} {
 		t.Run(test.name, func(t *testing.T) {
-			reg := prometheus.NewRegistry()
+			reg := prometheus.NewPedanticRegistry()
 			reg.MustRegister(NewGoCollector(
 				WithGoCollectorMemStatsMetricsDisabled(),
 				WithoutGoCollectorRuntimeMetrics(test.matchers...),
@@ -242,7 +242,7 @@ func TestGoCollectorDenyList(t *testing.T) {
 }
 
 func ExampleGoCollector() {
-	reg := prometheus.NewRegistry()
+	reg := prometheus.NewPedanticRegistry()
 
 	// Register the GoCollector with the default options. Only the base metrics, default runtime metrics and memstats are enabled.
 	reg.MustRegister(NewGoCollector())
@@ -252,7 +252,7 @@ func ExampleGoCollector() {
 }
 
 func ExampleGoCollector_WithAdvancedGoMetrics() {
-	reg := prometheus.NewRegistry()
+	reg := prometheus.NewPedanticRegistry()
 
 	// Enable Go metrics with pre-defined rules. Or your custom rules.
 	reg.MustRegister(

prometheus/process_collector.go

@@ -140,6 +140,8 @@ func (c *processCollector) Describe(ch chan<- *Desc) {
 	ch <- c.maxVsize
 	ch <- c.rss
 	ch <- c.startTime
+	ch <- c.inBytes
+	ch <- c.outBytes
 }
 
 // Collect returns the current state of all metrics of the collector.

prometheus/process_collector_test.go

@@ -37,7 +37,7 @@ func TestProcessCollector(t *testing.T) {
 		t.Skipf("skipping TestProcessCollector, procfs not available: %s", err)
 	}
 
-	registry := NewRegistry()
+	registry := NewPedanticRegistry()
 	if err := registry.Register(NewProcessCollector(ProcessCollectorOpts{})); err != nil {
 		t.Fatal(err)
 	}

prometheus/promhttp/http.go

@@ -203,8 +203,10 @@ func HandlerForTransactional(reg prometheus.TransactionalGatherer, opts HandlerO
 
 		defer closeWriter()
 
-		rsp.Header().Set(contentEncodingHeader, encodingHeader)
-
+		// Set Content-Encoding only when data is compressed
+		if encodingHeader != string(Identity) {
+			rsp.Header().Set(contentEncodingHeader, encodingHeader)
+		}
 		enc := expfmt.NewEncoder(w, contentType)
 
 		// handleError handles the error according to opts.ErrorHandling

prometheus/promhttp/http_test.go

@@ -267,7 +267,7 @@ func TestInstrumentMetricHandler(t *testing.T) {
 		t.Errorf("got HTTP status code %d, want %d", got, want)
 	}
 
-	if got, want := writer.Header().Get(contentEncodingHeader), string(Identity); got != want {
+	if got, want := writer.Header().Get(contentEncodingHeader), ""; got != want {
 		t.Errorf("got HTTP content encoding header %s, want %s", got, want)
 	}