[receiver/hostmetrics]: change uptime scraper to system scraper (#36123)

<!--Ex. Fixing a bug - Describe the bug and how this fixes the issue.
Ex. Adding a feature - Explain what this achieves.-->
#### Description
This PR makes some changes that I had hoped to suggest on #35954,
however I was unable to make my comment in time before the PR was
merged.

The changes this PR makes are:
* The `uptime` scraper is changed to be named `system`
* The scraper is registered using the scraper name when adding to the
scrapercontroller

<!-- Issue number (e.g. #1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
Amends the fix to #31627 (following a comment I made on #35932)

<!--Describe what testing was performed and which tests were added.-->
#### Testing

<!--Describe the documentation added.-->
#### Documentation

The documentation that was added for the `uptime` scraper was renamed
accordingly, and the description adjusted.

<!--Please delete paragraphs that you did not use before submitting.-->

.chloggen/add-hostmetric-system-uptime.yaml

@@ -5,15 +5,15 @@ change_type: enhancement
 component: hostmetricsreceiver
 
 # A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
-note: Add an uptime scraper in the hostmetrics receiver
+note: Add the system.uptime metric in the hostmetrics receiver
 
 # Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
 issues: [31627]
 
 # (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:
+subtext: This metric is provided by the new `system` scraper.
 
 # 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.

receiver/hostmetricsreceiver/README.md

@@ -17,7 +17,7 @@
 <!-- end autogenerated section -->
 
 The Host Metrics receiver generates metrics about the host system scraped
-from various sources and host entity event as log. This is intended to be 
+from various sources and host entity event as log. This is intended to be
 used when the collector is deployed as an agent.
 
 ## Getting Started
@@ -49,7 +49,7 @@ The available scrapers are:
 | [paging]     | All                          | Paging/Swap space utilization and I/O metrics          |
 | [processes]  | Linux, Mac                   | Process count metrics                                  |
 | [process]    | Linux, Windows, Mac          | Per process CPU, Memory, and Disk I/O metrics          |
-| [uptime]     | Linux, Windows, Mac          | Uptime metric                                          |
+| [system]     | Linux, Windows, Mac          | Miscellaneous system metrics                           |
 
 [cpu]: ./internal/scraper/cpuscraper/documentation.md
 [disk]: ./internal/scraper/diskscraper/documentation.md
@@ -60,7 +60,7 @@ The available scrapers are:
 [paging]: ./internal/scraper/pagingscraper/documentation.md
 [processes]: ./internal/scraper/processesscraper/documentation.md
 [process]: ./internal/scraper/processscraper/documentation.md
-[uptime]: ./internal/scraper/uptimescraper/documentation.md
+[system]: ./internal/scraper/systemscraper/documentation.md
 
 ### Notes
 
@@ -172,14 +172,14 @@ service:
 
 Host metrics are collected from the Linux system directories on the filesystem.
 You likely want to collect metrics about the host system and not the container.
-This is achievable by following these steps: 
+This is achievable by following these steps:
 
 #### 1. Bind mount the host filesystem
 
-The simplest configuration is to mount the entire host filesystem when running 
+The simplest configuration is to mount the entire host filesystem when running
 the container. e.g. `docker run -v /:/hostfs ...`.
 
-You can also choose which parts of the host filesystem to mount, if you know 
+You can also choose which parts of the host filesystem to mount, if you know
 exactly what you'll need. e.g. `docker run -v /proc:/hostfs/proc`.
 
 #### 2. Configure `root_path`

receiver/hostmetricsreceiver/config_test.go

@@ -27,7 +27,7 @@ import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/pagingscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processesscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processscraper"
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"
 )
 
 func TestLoadConfig(t *testing.T) {
@@ -119,8 +119,8 @@ func TestLoadConfig(t *testing.T) {
 				cfg.SetEnvMap(common.EnvMap{})
 				return cfg
 			})(),
-			uptimescraper.TypeStr: (func() internal.Config {
-				cfg := (&uptimescraper.Factory{}).CreateDefaultConfig()
+			systemscraper.TypeStr: (func() internal.Config {
+				cfg := (&systemscraper.Factory{}).CreateDefaultConfig()
 				cfg.SetEnvMap(common.EnvMap{})
 				return cfg
 			})(),

receiver/hostmetricsreceiver/factory.go

@@ -27,7 +27,7 @@ import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/pagingscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processesscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processscraper"
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"
 )
 
 const (
@@ -46,7 +46,7 @@ var (
 		pagingscraper.TypeStr:     &pagingscraper.Factory{},
 		processesscraper.TypeStr:  &processesscraper.Factory{},
 		processscraper.TypeStr:    &processscraper.Factory{},
-		uptimescraper.TypeStr:     &uptimescraper.Factory{},
+		systemscraper.TypeStr:     &systemscraper.Factory{},
 	}
 )
 

receiver/hostmetricsreceiver/hostmetrics_receiver_test.go

@@ -34,7 +34,7 @@ import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/pagingscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processesscraper"
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processscraper"
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"
 )
 
 var allMetrics = []string{
@@ -82,7 +82,7 @@ var factories = map[string]internal.ScraperFactory{
 	pagingscraper.TypeStr:     &pagingscraper.Factory{},
 	processesscraper.TypeStr:  &processesscraper.Factory{},
 	processscraper.TypeStr:    &processscraper.Factory{},
-	uptimescraper.TypeStr:     &uptimescraper.Factory{},
+	systemscraper.TypeStr:     &systemscraper.Factory{},
 }
 
 type testEnv struct {
@@ -404,7 +404,7 @@ func Benchmark_ScrapeUptimeMetrics(b *testing.B) {
 
 	cfg := &Config{
 		ControllerConfig: scraperhelper.NewDefaultControllerConfig(),
-		Scrapers:         map[string]internal.Config{uptimescraper.TypeStr: (&uptimescraper.Factory{}).CreateDefaultConfig()},
+		Scrapers:         map[string]internal.Config{systemscraper.TypeStr: (&systemscraper.Factory{}).CreateDefaultConfig()},
 	}
 
 	benchmarkScrapeMetrics(b, cfg)
@@ -444,6 +444,7 @@ func Benchmark_ScrapeSystemAndProcessMetrics(b *testing.B) {
 			networkscraper.TypeStr:    &networkscraper.Config{},
 			pagingscraper.TypeStr:     (&pagingscraper.Factory{}).CreateDefaultConfig(),
 			processesscraper.TypeStr:  &processesscraper.Config{},
+			systemscraper.TypeStr:     &systemscraper.Config{},
 		},
 	}
 

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/config.go → receiver/hostmetricsreceiver/internal/scraper/systemscraper/config.go

@@ -1,11 +1,11 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package uptimescraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+package systemscraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"
 
 import (
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal"
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper/internal/metadata"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper/internal/metadata"
 )
 
 // Config relating to Uptime Metric Scraper.

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/doc.go → receiver/hostmetricsreceiver/internal/scraper/systemscraper/doc.go

@@ -3,4 +3,4 @@
 
 //go:generate mdatagen metadata.yaml
 
-package uptimescraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+package systemscraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/documentation.md → receiver/hostmetricsreceiver/internal/scraper/systemscraper/documentation.md

@@ -1,6 +1,6 @@
 [comment]: <> (Code generated by mdatagen. DO NOT EDIT.)
 
-# hostmetricsreceiver/uptime
+# hostmetricsreceiver/system
 
 **Parent Component:** hostmetrics
 

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/factory.go → receiver/hostmetricsreceiver/internal/scraper/systemscraper/factory.go

@@ -1,26 +1,31 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package uptimescraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+package systemscraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"
 
 import (
 	"context"
 	"errors"
 	"runtime"
 
+	"go.opentelemetry.io/collector/component"
 	"go.opentelemetry.io/collector/receiver"
 	"go.opentelemetry.io/collector/receiver/scraperhelper"
 
 	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal"
-	hostmeta "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/metadata"
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper/internal/metadata"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper/internal/metadata"
 )
 
-// This file implements Factory for Uptime scraper.
+// This file implements Factory for System scraper.
 
 const (
 	// TypeStr the value of "type" key in configuration.
-	TypeStr = "uptime"
+	TypeStr = "system"
+)
+
+var (
+	// scraperType is the component type used for the built scraper.
+	scraperType component.Type = component.MustNewType(TypeStr)
 )
 
 // Factory is the Factory for scraper.
@@ -47,7 +52,7 @@ func (f *Factory) CreateMetricsScraper(
 	uptimeScraper := newUptimeScraper(ctx, settings, cfg.(*Config))
 
 	return scraperhelper.NewScraper(
-		hostmeta.Type,
+		scraperType,
 		uptimeScraper.scrape,
 		scraperhelper.WithStart(uptimeScraper.start),
 	)

receiver/hostmetricsreceiver/internal/scraper/systemscraper/factory_test.go

@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package systemscraper
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"go.opentelemetry.io/collector/receiver/receivertest"
+)
+
+func TestCreateSystemScraper(t *testing.T) {
+	factory := &Factory{}
+	cfg := &Config{}
+
+	scraper, err := factory.CreateMetricsScraper(context.Background(), receivertest.NewNopSettings(), cfg)
+
+	assert.NoError(t, err)
+	assert.NotNil(t, scraper)
+	assert.Equal(t, scraperType.String(), scraper.ID().String())
+}

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/metadata.yaml → receiver/hostmetricsreceiver/internal/scraper/systemscraper/metadata.yaml

@@ -1,4 +1,4 @@
-type: hostmetricsreceiver/uptime
+type: hostmetricsreceiver/system
 
 parent: hostmetrics
 

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/package_test.go → receiver/hostmetricsreceiver/internal/scraper/systemscraper/package_test.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package uptimescraper
+package systemscraper
 
 import (
 	"testing"

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/uptime.go → receiver/hostmetricsreceiver/internal/scraper/systemscraper/system_scraper.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package uptimescraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper"
+package systemscraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper"
 
 import (
 	"context"
@@ -14,7 +14,7 @@ import (
 	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.opentelemetry.io/collector/receiver"
 
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper/internal/metadata"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper/internal/metadata"
 )
 
 // scraper for Uptime Metrics

receiver/hostmetricsreceiver/internal/scraper/uptimescraper/uptime_test.go → receiver/hostmetricsreceiver/internal/scraper/systemscraper/system_scraper_test.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-package uptimescraper
+package systemscraper
 
 import (
 	"context"
@@ -14,7 +14,7 @@ import (
 	"go.opentelemetry.io/collector/pdata/pmetric"
 	"go.opentelemetry.io/collector/receiver/receivertest"
 
-	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/uptimescraper/internal/metadata"
+	"github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/systemscraper/internal/metadata"
 )
 
 func TestScrape(t *testing.T) {

receiver/hostmetricsreceiver/testdata/config.yaml

@@ -21,7 +21,7 @@ receivers:
         include:
           names: ["test2", "test3"]
           match_type: "regexp"
-      uptime:
+      system:
 
 processors:
   nop: