From c92673fb1480cd6e3404a004522cbb851be4115d Mon Sep 17 00:00:00 2001
From: Nicholas Blott <blottn@tcd.ie>
Date: Thu, 16 Dec 2021 12:28:46 +0000
Subject: [PATCH] Remove check against cfg so interval/ timeout are always set
 (#10023)

Signed-off-by: Nicholas Blott <blottn@tcd.ie>
---
 cmd/promtool/sd_test.go | 11 +++++++----
 scrape/target.go        | 34 ++++++++++++++--------------------
 scrape/target_test.go   |  6 +++++-
 3 files changed, 26 insertions(+), 25 deletions(-)

diff --git a/cmd/promtool/sd_test.go b/cmd/promtool/sd_test.go
index 7f80437cf..5fa97bf8a 100644
--- a/cmd/promtool/sd_test.go
+++ b/cmd/promtool/sd_test.go
@@ -15,6 +15,7 @@ package main
 
 import (
 	"testing"
+	"time"
 
 	"github.com/prometheus/common/model"
 
@@ -37,6 +38,8 @@ func TestSDCheckResult(t *testing.T) {
 	require.Nil(t, err)
 
 	scrapeConfig := &config.ScrapeConfig{
+		ScrapeInterval: model.Duration(1 * time.Minute),
+		ScrapeTimeout:  model.Duration(10 * time.Second),
 		RelabelConfigs: []*relabel.Config{{
 			SourceLabels: model.LabelNames{"foo"},
 			Action:       relabel.Replace,
@@ -50,14 +53,14 @@ func TestSDCheckResult(t *testing.T) {
 		{
 			DiscoveredLabels: labels.Labels{
 				labels.Label{Name: "__address__", Value: "localhost:8080"},
-				labels.Label{Name: "__scrape_interval__", Value: "0s"},
-				labels.Label{Name: "__scrape_timeout__", Value: "0s"},
+				labels.Label{Name: "__scrape_interval__", Value: "1m"},
+				labels.Label{Name: "__scrape_timeout__", Value: "10s"},
 				labels.Label{Name: "foo", Value: "bar"},
 			},
 			Labels: labels.Labels{
 				labels.Label{Name: "__address__", Value: "localhost:8080"},
-				labels.Label{Name: "__scrape_interval__", Value: "0s"},
-				labels.Label{Name: "__scrape_timeout__", Value: "0s"},
+				labels.Label{Name: "__scrape_interval__", Value: "1m"},
+				labels.Label{Name: "__scrape_timeout__", Value: "10s"},
 				labels.Label{Name: "foo", Value: "bar"},
 				labels.Label{Name: "instance", Value: "localhost:8080"},
 				labels.Label{Name: "newfoo", Value: "bar"},
diff --git a/scrape/target.go b/scrape/target.go
index 59d6c9403..e017a4584 100644
--- a/scrape/target.go
+++ b/scrape/target.go
@@ -418,28 +418,22 @@ func PopulateLabels(lset labels.Labels, cfg *config.ScrapeConfig) (res, orig lab
 		return nil, nil, err
 	}
 
-	var interval string
-	var intervalDuration model.Duration
-	if interval = lset.Get(model.ScrapeIntervalLabel); interval != cfg.ScrapeInterval.String() {
-		intervalDuration, err = model.ParseDuration(interval)
-		if err != nil {
-			return nil, nil, errors.Errorf("error parsing scrape interval: %v", err)
-		}
-		if time.Duration(intervalDuration) == 0 {
-			return nil, nil, errors.New("scrape interval cannot be 0")
-		}
+	interval := lset.Get(model.ScrapeIntervalLabel)
+	intervalDuration, err := model.ParseDuration(interval)
+	if err != nil {
+		return nil, nil, errors.Errorf("error parsing scrape interval: %v", err)
+	}
+	if time.Duration(intervalDuration) == 0 {
+		return nil, nil, errors.New("scrape interval cannot be 0")
 	}
 
-	var timeout string
-	var timeoutDuration model.Duration
-	if timeout = lset.Get(model.ScrapeTimeoutLabel); timeout != cfg.ScrapeTimeout.String() {
-		timeoutDuration, err = model.ParseDuration(timeout)
-		if err != nil {
-			return nil, nil, errors.Errorf("error parsing scrape timeout: %v", err)
-		}
-		if time.Duration(timeoutDuration) == 0 {
-			return nil, nil, errors.New("scrape timeout cannot be 0")
-		}
+	timeout := lset.Get(model.ScrapeTimeoutLabel)
+	timeoutDuration, err := model.ParseDuration(timeout)
+	if err != nil {
+		return nil, nil, errors.Errorf("error parsing scrape timeout: %v", err)
+	}
+	if time.Duration(timeoutDuration) == 0 {
+		return nil, nil, errors.New("scrape timeout cannot be 0")
 	}
 
 	if timeoutDuration > intervalDuration {
diff --git a/scrape/target_test.go b/scrape/target_test.go
index 32ab4669e..0e02dd8f9 100644
--- a/scrape/target_test.go
+++ b/scrape/target_test.go
@@ -371,7 +371,11 @@ func TestNewClientWithBadTLSConfig(t *testing.T) {
 func TestTargetsFromGroup(t *testing.T) {
 	expectedError := "instance 0 in group : no address"
 
-	targets, failures := TargetsFromGroup(&targetgroup.Group{Targets: []model.LabelSet{{}, {model.AddressLabel: "localhost:9090"}}}, &config.ScrapeConfig{})
+	cfg := config.ScrapeConfig{
+		ScrapeTimeout:  model.Duration(10 * time.Second),
+		ScrapeInterval: model.Duration(1 * time.Minute),
+	}
+	targets, failures := TargetsFromGroup(&targetgroup.Group{Targets: []model.LabelSet{{}, {model.AddressLabel: "localhost:9090"}}}, &cfg)
 	if len(targets) != 1 {
 		t.Fatalf("Expected 1 target, got %v", len(targets))
 	}