[receiver/hostmetrics] Allow process scraping under FreeBSD

Author: nozomi-gedimitr

receiver/hostmetricsreceiver/README.md

@@ -47,8 +47,8 @@ The available scrapers are:
 | [memory]     | All                          | Memory utilization metrics                             |
 | [network]    | All                          | Network interface I/O metrics & TCP connection metrics |
 | [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          |
+| [processes]  | Linux, Mac, FreeBSD          | Process count metrics                                  |
+| [process]    | Linux, Windows, Mac, FreeBSD | Per process CPU, Memory, and Disk I/O metrics          |
 | [system]     | Linux, Windows, Mac          | Miscellaneous system metrics                           |
 
 [cpu]: ./internal/scraper/cpuscraper/documentation.md

receiver/hostmetricsreceiver/internal/scraper/processscraper/factory.go

@@ -44,8 +44,8 @@ func createMetricsScraper(
 	settings scraper.Settings,
 	cfg component.Config,
 ) (scraper.Metrics, error) {
-	if runtime.GOOS != "linux" && runtime.GOOS != "windows" && runtime.GOOS != "darwin" {
-		return nil, errors.New("process scraper only available on Linux, Windows, or macOS")
+	if runtime.GOOS != "linux" && runtime.GOOS != "windows" && runtime.GOOS != "darwin" && runtime.GOOS != "freebsd" {
+		return nil, errors.New("process scraper only available on Linux, Windows, macOS, or FreeBSD")
 	}
 
 	s, err := newProcessScraper(settings, cfg.(*Config))

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

@@ -26,7 +26,7 @@ func TestCreateResourceMetricsScraper(t *testing.T) {
 
 	scraper, err := factory.CreateMetrics(context.Background(), scrapertest.NewNopSettings(metadata.Type), cfg)
 
-	if runtime.GOOS == "linux" || runtime.GOOS == "windows" || runtime.GOOS == "darwin" {
+	if runtime.GOOS == "linux" || runtime.GOOS == "windows" || runtime.GOOS == "darwin" || runtime.GOOS == "freebsd" {
 		assert.NoError(t, err)
 		assert.NotNil(t, scraper)
 	} else {

receiver/hostmetricsreceiver/internal/scraper/processscraper/process_scraper_darwin.go renamed to receiver/hostmetricsreceiver/internal/scraper/processscraper/process_scraper_bsds.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-//go:build darwin
+//go:build darwin || freebsd
 
 package processscraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processscraper"
 

receiver/hostmetricsreceiver/internal/scraper/processscraper/process_scraper_others.go

@@ -1,7 +1,7 @@
 // Copyright The OpenTelemetry Authors
 // SPDX-License-Identifier: Apache-2.0
 
-//go:build !linux && !windows && !darwin
+//go:build !linux && !windows && !darwin && !freebsd
 
 package processscraper // import "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/hostmetricsreceiver/internal/scraper/processscraper"