[receiver/simpleprometheus] Support customizing job name (#34408)

**Description:** <Describe what has changed.>

Resolve
#31502


**Link to tracking Issue:** 31502

.chloggen/simple_prometheus_job_name.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: enhancement
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: simpleprometheusreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Support to set `job_name` in config
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [31502]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: [user]

receiver/simpleprometheusreceiver/README.md

@@ -29,6 +29,7 @@ The following settings are optional:
 - `collection_interval` (default = `10s`): The internal at which metrics should
 be emitted by this receiver.
 - `metrics_path` (default = `/metrics`): The path to the metrics endpoint.
+- `job_name` (default = `prometheus_simple/${endpoint}`): Prometheus scrape job name.
 - `params` (default = `{}`): The query parameters to pass to the metrics endpoint. If specified, params are appended to `metrics_path` to form the URL with which the target is scraped.
 - `use_service_account` (default = `false`): Whether or not to use the
 Kubernetes Pod service account for authentication.
@@ -76,4 +77,3 @@ Example:
 
 The full list of settings exposed for this receiver are documented [here](./config.go)
 with detailed sample configurations [here](./testdata/config.yaml).
-

receiver/simpleprometheusreceiver/config.go

@@ -25,6 +25,8 @@ type Config struct {
 	Labels map[string]string `mapstructure:"labels,omitempty"`
 	// Whether or not to use pod service account to authenticate.
 	UseServiceAccount bool `mapstructure:"use_service_account"`
+	// JobName allows users to customize the job name optionally.
+	JobName string `mapstructure:"job_name"`
 }
 
 // TODO: Move to a common package for use by other receivers and also pull

receiver/simpleprometheusreceiver/config_test.go

@@ -49,6 +49,7 @@ func TestLoadConfig(t *testing.T) {
 				},
 				CollectionInterval: 30 * time.Second,
 				MetricsPath:        "/v2/metrics",
+				JobName:            "job123",
 				Params:             url.Values{"columns": []string{"name", "messages"}, "key": []string{"foo", "bar"}},
 				UseServiceAccount:  true,
 			},

receiver/simpleprometheusreceiver/receiver.go

@@ -109,10 +109,14 @@ func getPrometheusConfig(cfg *Config) (*prometheusreceiver.Config, error) {
 	}
 	labels[model.AddressLabel] = model.LabelValue(cfg.Endpoint)
 
+	jobName := cfg.JobName
+	if jobName == "" {
+		jobName = fmt.Sprintf("%s/%s", metadata.Type, cfg.Endpoint)
+	}
 	scrapeConfig := &config.ScrapeConfig{
 		ScrapeInterval:  model.Duration(cfg.CollectionInterval),
 		ScrapeTimeout:   model.Duration(cfg.CollectionInterval),
-		JobName:         fmt.Sprintf("%s/%s", metadata.Type, cfg.Endpoint),
+		JobName:         jobName,
 		HonorTimestamps: true,
 		Scheme:          scheme,
 		MetricsPath:     cfg.MetricsPath,

receiver/simpleprometheusreceiver/receiver_test.go

@@ -111,6 +111,41 @@ func TestGetPrometheusConfig(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "Test with job name",
+			config: &Config{
+				ClientConfig: confighttp.ClientConfig{
+					Endpoint: "localhost:1234",
+				},
+				CollectionInterval: 10 * time.Second,
+				MetricsPath:        "/metric",
+				JobName:            "job123",
+			},
+			want: &prometheusreceiver.Config{
+				PrometheusConfig: &prometheusreceiver.PromConfig{
+					GlobalConfig: config.DefaultGlobalConfig,
+					ScrapeConfigs: []*config.ScrapeConfig{
+						{
+							ScrapeInterval:  model.Duration(10 * time.Second),
+							ScrapeTimeout:   model.Duration(10 * time.Second),
+							JobName:         "job123",
+							HonorTimestamps: true,
+							Scheme:          "https",
+							MetricsPath:     "/metric",
+							ServiceDiscoveryConfigs: discovery.Configs{
+								&discovery.StaticConfig{
+									{
+										Targets: []model.LabelSet{
+											{model.AddressLabel: model.LabelValue("localhost:1234")},
+										},
+									},
+								},
+							},
+						},
+					},
+				},
+			},
+		},
 		{
 			name: "Test with TLS",
 			config: &Config{

receiver/simpleprometheusreceiver/testdata/config.yaml

@@ -3,6 +3,7 @@ prometheus_simple/all_settings:
   endpoint: "localhost:1234"
   collection_interval: 30s
   metrics_path: /v2/metrics
+  job_name: "job123"
   params:
     columns: "name,messages"
     key: [ "foo","bar" ]