[extension/solarwindsapmsettingsextension] Overall structure of the n…

…ew component (#30153)

**Description:** 
- Adding the overall structure of the new component
`extension/solarwindsapmsettingsextension` for the first PR

**Link to tracking Issue:** [27668](#27668)

**Testing:** 
- Added config test
- Added basic factory test and extension test

**Documentation:**
- Updated the README.md

---------

Co-authored-by: Antoine Toulme <antoine@toulme.name>

.chloggen/add-solarwindsapmsettingsextension.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: new_component
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: solarwindsapmsettingsextension
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: added configuration and readme
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [27668]
+
+# (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]

.github/CODEOWNERS

@@ -107,6 +107,7 @@ extension/opampextension/                                @open-telemetry/collect
 extension/pprofextension/                                @open-telemetry/collector-contrib-approvers @MovieStoreGuy
 extension/remotetapextension/                            @open-telemetry/collector-contrib-approvers @atoulme
 extension/sigv4authextension/                            @open-telemetry/collector-contrib-approvers @Aneurysm9 @erichsueh3
+extension/solarwindsapmsettingsextension/                @open-telemetry/collector-contrib-approvers @jerrytfleung @cheempz
 extension/storage/                                       @open-telemetry/collector-contrib-approvers @dmitryax @atoulme @djaglowski
 extension/storage/dbstorage/                             @open-telemetry/collector-contrib-approvers @dmitryax @atoulme
 extension/storage/filestorage/                           @open-telemetry/collector-contrib-approvers @djaglowski

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -106,6 +106,7 @@ body:
       - extension/pprof
       - extension/remotetap
       - extension/sigv4auth
+      - extension/solarwindsapmsettings
       - extension/storage
       - extension/storage/dbstorage
       - extension/storage/filestorage

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -100,6 +100,7 @@ body:
       - extension/pprof
       - extension/remotetap
       - extension/sigv4auth
+      - extension/solarwindsapmsettings
       - extension/storage
       - extension/storage/dbstorage
       - extension/storage/filestorage

.github/ISSUE_TEMPLATE/other.yaml

@@ -100,6 +100,7 @@ body:
       - extension/pprof
       - extension/remotetap
       - extension/sigv4auth
+      - extension/solarwindsapmsettings
       - extension/storage
       - extension/storage/dbstorage
       - extension/storage/filestorage

cmd/otelcontribcol/builder-config.yaml

@@ -27,6 +27,7 @@ extensions:
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/pprofextension v0.92.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/remotetapextension v0.92.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/sigv4authextension v0.92.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension v0.92.0
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage v0.92.0
     import: github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage/filestorage
   - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage v0.92.0
@@ -449,6 +450,7 @@ replaces:
   - github.com/open-telemetry/opentelemetry-collector-contrib/extension/encoding/jaegerencodingextension => ../../extension/encoding/jaegerencodingextension
   - github.com/open-telemetry/opentelemetry-collector-contrib/extension/remotetapextension => ../../extension/remotetapextension
   - github.com/open-telemetry/opentelemetry-collector-contrib/extension/opampextension => ../../extension/opampextension
+  - github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension => ../../extension/solarwindsapmsettingsextension
   - github.com/open-telemetry/opentelemetry-collector-contrib/testbed/mockdatasenders/mockdatadogagentexporter => ../../testbed/mockdatasenders/mockdatadogagentexporter
   - github.com/open-telemetry/opentelemetry-collector-contrib/testbed => ../../testbed
   - github.com/open-telemetry/opentelemetry-collector-contrib/receiver/namedpipereceiver => ../../receiver/namedpipereceiver

cmd/otelcontribcol/extensions_test.go

@@ -244,6 +244,10 @@ func TestDefaultExtensions(t *testing.T) {
 				return cfg
 			},
 		},
+		{
+			extension:     "solarwindsapmsettings",
+			skipLifecycle: true, // Requires Solarwinds APM endpoint and token
+		},
 	}
 
 	extensionCount := 0

cmd/otelcontribcol/go.mod

@@ -80,6 +80,7 @@ require (
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/pprofextension v0.92.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/remotetapextension v0.92.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/sigv4authextension v0.92.0
+	github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension v0.92.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage v0.92.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/common v0.92.0
 	github.com/open-telemetry/opentelemetry-collector-contrib/internal/coreinternal v0.92.0
@@ -1186,6 +1187,8 @@ replace github.com/open-telemetry/opentelemetry-collector-contrib/extension/remo
 
 replace github.com/open-telemetry/opentelemetry-collector-contrib/extension/opampextension => ../../extension/opampextension
 
+replace github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension => ../../extension/solarwindsapmsettingsextension
+
 replace github.com/open-telemetry/opentelemetry-collector-contrib/testbed/mockdatasenders/mockdatadogagentexporter => ../../testbed/mockdatasenders/mockdatadogagentexporter
 
 replace github.com/open-telemetry/opentelemetry-collector-contrib/testbed => ../../testbed

extension/solarwindsapmsettingsextension/Makefile

@@ -0,0 +1 @@
+include ../../Makefile.Common

extension/solarwindsapmsettingsextension/README.md

@@ -0,0 +1,38 @@
+# Solarwinds APM Settings extension
+
+<!-- status autogenerated section -->
+| Status        |           |
+| ------------- |-----------|
+| Stability     | [development]  |
+| Distributions | [] |
+| Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aextension%2Fsolarwindsapmsettings%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aextension%2Fsolarwindsapmsettings) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aextension%2Fsolarwindsapmsettings%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aextension%2Fsolarwindsapmsettings) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@jerrytfleung](https://www.github.com/jerrytfleung), [@cheempz](https://www.github.com/cheempz) |
+
+[development]: https://github.com/open-telemetry/opentelemetry-collector#development
+<!-- end autogenerated section -->
+
+## Overview
+The Solarwinds APM Settings extension gets Solarwinds APM specific settings from Solarwinds APM collector and `/tmp/solarwinds-apm-settings.json` & `/tmp/solarwinds-apm-settings-raw` periodically.
+
+## Configuration
+
+Example:
+
+```yaml
+extensions:
+  solarwindsapmsettings:
+    endpoint: "<endpoint>"
+    key: "<token>:<name>"
+    interval: 1m
+```
+
+### endpoint (Required)
+The APM collector endpoint which this extension calls `getSettings`. See [here](https://documentation.solarwinds.com/en/success_center/observability/content/system_requirements/endpoints.htm) for our APM collector endpoints.
+
+### key (Required)
+The service key in format `<token>:<name>` for `getSettings` from Solarwinds APM collector. See [here](https://documentation.solarwinds.com/en/success_center/observability/content/configure/configure-services.htm) for configuring a service key.
+
+### interval (Optional)
+Periodic interval to get Solarwinds APM specific settings from Solarwinds APM collector.
+
+Default: `1m`

extension/solarwindsapmsettingsextension/config.go

@@ -0,0 +1,41 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package solarwindsapmsettingsextension // import "github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension"
+
+import (
+	"errors"
+	"strconv"
+	"strings"
+	"time"
+)
+
+type Config struct {
+	Endpoint string `mapstructure:"endpoint"`
+	Key      string `mapstructure:"key"`
+	Interval string `mapstructure:"interval"`
+}
+
+func (cfg *Config) Validate() error {
+	if len(cfg.Endpoint) == 0 {
+		return errors.New("endpoint must not be empty")
+	}
+	endpointArr := strings.Split(cfg.Endpoint, ":")
+	if len(endpointArr) != 2 {
+		return errors.New("endpoint should be in \"<host>:<port>\" format")
+	}
+	if _, err := strconv.Atoi(endpointArr[1]); err != nil {
+		return errors.New("the <port> portion of endpoint has to be an integer")
+	}
+	if len(cfg.Key) == 0 {
+		return errors.New("key must not be empty")
+	}
+	keyArr := strings.Split(cfg.Key, ":")
+	if len(keyArr) != 2 {
+		return errors.New("key should be in \"<token>:<service_name>\" format")
+	}
+	if _, err := time.ParseDuration(cfg.Interval); err != nil {
+		return errors.New("interval has to be a duration string. Valid time units are \"ns\", \"us\" (or \"µs\"), \"ms\", \"s\", \"m\", \"h\"")
+	}
+	return nil
+}

extension/solarwindsapmsettingsextension/config_test.go

@@ -0,0 +1,66 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package solarwindsapmsettingsextension
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestValidate(t *testing.T) {
+	tests := []struct {
+		name string
+		cfg  *Config
+		err  error
+	}{
+		{
+			name: "nothing",
+			cfg:  &Config{},
+			err:  errors.New("endpoint must not be empty"),
+		},
+		{
+			name: "empty key",
+			cfg: &Config{
+				Endpoint: "host:12345",
+			},
+			err: errors.New("key must not be empty"),
+		},
+		{
+			name: "invalid endpoint",
+			cfg: &Config{
+				Endpoint: "invalid",
+				Key:      "token:name",
+			},
+			err: errors.New("endpoint should be in \"<host>:<port>\" format"),
+		},
+		{
+			name: "invalid endpoint format but port is not an integer",
+			cfg: &Config{
+				Endpoint: "host:abc",
+				Key:      "token:name",
+			},
+			err: errors.New("the <port> portion of endpoint has to be an integer"),
+		},
+		{
+			name: "invalid key",
+			cfg: &Config{
+				Endpoint: "host:12345",
+				Key:      "invalid",
+			},
+			err: errors.New("key should be in \"<token>:<service_name>\" format"),
+		},
+	}
+	for _, tc := range tests {
+		t.Run(tc.name, func(t *testing.T) {
+			err := tc.cfg.Validate()
+			if tc.err != nil {
+				require.EqualError(t, err, tc.err.Error())
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

extension/solarwindsapmsettingsextension/doc.go

@@ -0,0 +1,7 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate mdatagen metadata.yaml
+
+// Package solarwindsapmsettingsextension
+package solarwindsapmsettingsextension // import "github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension"

extension/solarwindsapmsettingsextension/extension.go

@@ -0,0 +1,37 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package solarwindsapmsettingsextension // import "github.com/open-telemetry/opentelemetry-collector-contrib/extension/solarwindsapmsettingsextension"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/extension"
+	"go.uber.org/zap"
+)
+
+type solarwindsapmSettingsExtension struct {
+	logger *zap.Logger
+	config *Config
+	cancel context.CancelFunc
+}
+
+func newSolarwindsApmSettingsExtension(extensionCfg *Config, logger *zap.Logger) (extension.Extension, error) {
+	settingsExtension := &solarwindsapmSettingsExtension{
+		config: extensionCfg,
+		logger: logger,
+	}
+	return settingsExtension, nil
+}
+
+func (extension *solarwindsapmSettingsExtension) Start(_ context.Context, _ component.Host) error {
+	extension.logger.Debug("Starting up solarwinds apm settings extension")
+	_, extension.cancel = context.WithCancel(context.Background())
+	return nil
+}
+
+func (extension *solarwindsapmSettingsExtension) Shutdown(_ context.Context) error {
+	extension.logger.Debug("Shutting down solarwinds apm settings extension")
+	return nil
+}

extension/solarwindsapmsettingsextension/extension_test.go

@@ -0,0 +1,53 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package solarwindsapmsettingsextension
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"go.opentelemetry.io/collector/extension"
+	"go.uber.org/zap"
+)
+
+func TestCreateExtension(t *testing.T) {
+	conf := &Config{
+		Endpoint: "apm-testcollector.click:443",
+		Key:      "valid:unittest",
+		Interval: "1s",
+	}
+	ex := createAnExtension(conf, t)
+	require.NoError(t, ex.Shutdown(context.TODO()))
+}
+
+func TestCreateExtensionWrongEndpoint(t *testing.T) {
+	conf := &Config{
+		Endpoint: "apm-testcollector.nothing:443",
+		Key:      "valid:unittest",
+		Interval: "1s",
+	}
+	ex := createAnExtension(conf, t)
+	require.NoError(t, ex.Shutdown(context.TODO()))
+}
+
+func TestCreateExtensionWrongKey(t *testing.T) {
+	conf := &Config{
+		Endpoint: "apm-testcollector.click:443",
+		Key:      "invalid",
+		Interval: "1s",
+	}
+	ex := createAnExtension(conf, t)
+	require.NoError(t, ex.Shutdown(context.TODO()))
+}
+
+// create extension
+func createAnExtension(c *Config, t *testing.T) extension.Extension {
+	logger, err := zap.NewProduction()
+	require.NoError(t, err)
+	ex, err := newSolarwindsApmSettingsExtension(c, logger)
+	require.NoError(t, err)
+	require.NoError(t, ex.Start(context.TODO(), nil))
+	return ex
+}