[exporter/sematext] New component: Sematext Exporter (open-telemetry#37161)

#### Description
First PR of New component: Sematext Exporter.

<!-- Issue number (e.g. open-telemetry#1234) or full URL to issue, if applicable. -->
#### Link to tracking issue
open-telemetry#36465

---------

Co-authored-by: Andrzej Stencel <[email protected]>

Author: 2 people

.chloggen/sematextexporter-new-component.yaml

@@ -0,0 +1,21 @@
+# 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: exporter/sematext
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Add a new component for exporting metrics and logs to Sematext"
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [36465]
+# (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

@@ -73,6 +73,7 @@ exporter/prometheusremotewriteexporter/                          @open-telemetry
 exporter/pulsarexporter/                                         @open-telemetry/collector-contrib-approvers @dmitryax @dao-jun
 exporter/rabbitmqexporter/                                       @open-telemetry/collector-contrib-approvers @swar8080 @atoulme
 exporter/sapmexporter/                                           @open-telemetry/collector-contrib-approvers @dmitryax @atoulme
+exporter/sematextexporter/                                       @open-telemetry/collector-contrib-approvers @AkhigbeEromo
 exporter/sentryexporter/                                         @open-telemetry/collector-contrib-approvers @AbhiPrasad
 exporter/signalfxexporter/                                       @open-telemetry/collector-contrib-approvers @dmitryax @crobert-1
 exporter/splunkhecexporter/                                      @open-telemetry/collector-contrib-approvers @atoulme @dmitryax

.github/ISSUE_TEMPLATE/bug_report.yaml

@@ -78,6 +78,7 @@ body:
       - exporter/pulsar
       - exporter/rabbitmq
       - exporter/sapm
+      - exporter/sematext
       - exporter/sentry
       - exporter/signalfx
       - exporter/splunkhec

.github/ISSUE_TEMPLATE/feature_request.yaml

@@ -72,6 +72,7 @@ body:
       - exporter/pulsar
       - exporter/rabbitmq
       - exporter/sapm
+      - exporter/sematext
       - exporter/sentry
       - exporter/signalfx
       - exporter/splunkhec

.github/ISSUE_TEMPLATE/other.yaml

@@ -72,6 +72,7 @@ body:
       - exporter/pulsar
       - exporter/rabbitmq
       - exporter/sapm
+      - exporter/sematext
       - exporter/sentry
       - exporter/signalfx
       - exporter/splunkhec

.github/ISSUE_TEMPLATE/unmaintained.yaml

@@ -77,6 +77,7 @@ body:
       - exporter/pulsar
       - exporter/rabbitmq
       - exporter/sapm
+      - exporter/sematext
       - exporter/sentry
       - exporter/signalfx
       - exporter/splunkhec

cmd/githubgen/allowlist.txt

@@ -1,4 +1,5 @@
 abhishek-at-cloudwerx
+AkhigbeEromo
 Caleb-Hurshman
 cemdk
 dlopes7

exporter/sematextexporter/Makefile

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

exporter/sematextexporter/README.md

@@ -0,0 +1,59 @@
+# Sematext Exporter
+<!-- status autogenerated section -->
+| Status        |           |
+| ------------- |-----------|
+| Stability     | [development]: metrics, logs   |
+| Distributions | [] |
+| Issues        | [![Open issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aopen%20label%3Aexporter%2Fsematext%20&label=open&color=orange&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aopen+is%3Aissue+label%3Aexporter%2Fsematext) [![Closed issues](https://img.shields.io/github/issues-search/open-telemetry/opentelemetry-collector-contrib?query=is%3Aissue%20is%3Aclosed%20label%3Aexporter%2Fsematext%20&label=closed&color=blue&logo=opentelemetry)](https://github.com/open-telemetry/opentelemetry-collector-contrib/issues?q=is%3Aclosed+is%3Aissue+label%3Aexporter%2Fsematext) |
+| [Code Owners](https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/main/CONTRIBUTING.md#becoming-a-code-owner)    | [@AkhigbeEromo](https://www.github.com/AkhigbeEromo) |
+
+[development]: https://github.com/open-telemetry/opentelemetry-collector/blob/main/docs/component-stability.md#development
+<!-- end autogenerated section -->
+
+This exporter supports sending metrics to [Sematext Cloud](https://sematext.com/) in Influx line protocol format and logs using the Bulk Index Api format.
+
+## Configuration
+
+The following configuration options are supported:
+* `timeout` (default = 5s) Timeout for requests
+* `region`  Region specifies the Sematext region the user is operating in; must be one of:
+  * `US`
+  * `EU`
+* `retry_on_failure` [details here](https://github.com/open-telemetry/opentelemetry-collector/blob/v0.25.0/exporter/exporterhelper/README.md#configuration)
+    * `enabled` (default = true)
+    * `initial_interval` (default = 5s) Time to wait after the first failure before retrying
+    * `max_interval` (default = 30s) Upper bound on backoff interval
+    * `max_elapsed_time` (default = 120s) Maximum amount of time (including retries) spent trying to send a request/batch  
+* `metrics.app_token` specifies the token of the Sematext Monitoring App to which metrics data will be sent. It must be a valid UUID string in the format `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx`. For example: `2046e37c-4fac-45f6-831d-922d43fde759`.
+* `logs.app_token` specifies the token of the Sematext Logs App to which logs data will be sent. It must be a valid UUID string in the format `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx`. For example: `9604e37c-49ac-49f6-831d-922d43fde759`.
+* `metrics.payload_max_lines` (default = 1_000) Maximum number of lines allowed per HTTP POST request
+* `metrics.payload_max_bytes` (default = 300_000) Maximum number of bytes allowed per HTTP POST request
+* `metrics.metrics_schema` (default = telegraf-prometheus-v2) The chosen metrics schema to write
+* `metrics.sending_queue` [details here](https://github.com/open-telemetry/opentelemetry-collector/blob/v0.25.0/exporter/exporterhelper/README.md#configuration)
+    * `enabled` (default = true)
+    * `num_consumers` (default = 10) The number of consumers from the queue
+    * `queue_size` (default = 1000) Maximum number of batches allowed in queue at a given time
+
+
+The full list of settings exposed for this exporter are documented in [config.go](config.go).
+
+Example:
+```yaml
+timeout: 500ms
+region: US  
+retry_on_failure:
+  enabled: true
+  initial_interval: 1s
+  max_interval: 3s
+  max_elapsed_time: 10s
+metrics:
+  app_token: 2064e37c-4fac-45f6-831d-922d43fde759
+  sending_queue:
+    enabled: true
+    num_consumers: 3
+    queue_size: 10
+  payload_max_lines: 100
+  payload_max_bytes: 1000
+logs:
+  app_token: 9064e37c-4gac-49f6-831d-922l43fse759
+```

exporter/sematextexporter/config.go

@@ -0,0 +1,6 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package sematextexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sematextexporter"
+
+type Config struct{}

exporter/sematextexporter/doc.go

@@ -0,0 +1,7 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate mdatagen metadata.yaml
+
+// Package sematextexporter sends metrics and logs to sematext cloud.
+package sematextexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sematextexporter"

exporter/sematextexporter/factory.go

@@ -0,0 +1,67 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+//go:generate mdatagen metadata.yaml
+
+package sematextexporter // import "github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sematextexporter"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/collector/component"
+	"go.opentelemetry.io/collector/exporter"
+	"go.opentelemetry.io/collector/exporter/exporterhelper"
+	"go.opentelemetry.io/collector/pdata/plog"
+	"go.opentelemetry.io/collector/pdata/pmetric"
+
+	"github.com/open-telemetry/opentelemetry-collector-contrib/exporter/sematextexporter/internal/metadata"
+)
+
+// NewFactory creates a factory for the Sematext metrics exporter.
+func NewFactory() exporter.Factory {
+	return exporter.NewFactory(
+		metadata.Type,
+		createDefaultConfig,
+		exporter.WithMetrics(createMetricsExporter, metadata.MetricsStability),
+		exporter.WithLogs(createLogsExporter, metadata.LogsStability),
+	)
+}
+
+func createDefaultConfig() component.Config {
+	cfg := &Config{}
+	return cfg
+}
+
+func createMetricsExporter(
+	ctx context.Context,
+	set exporter.Settings,
+	config component.Config,
+) (exporter.Metrics, error) {
+	cfg := config.(*Config)
+
+	return exporterhelper.NewMetrics(
+		ctx,
+		set,
+		cfg,
+		func(_ context.Context, _ pmetric.Metrics) error {
+			return nil
+		},
+	)
+}
+
+func createLogsExporter(
+	ctx context.Context,
+	set exporter.Settings,
+	config component.Config,
+) (exporter.Logs, error) {
+	cfg := config.(*Config)
+
+	return exporterhelper.NewLogs(
+		ctx,
+		set,
+		cfg,
+		func(_ context.Context, _ plog.Logs) error {
+			return nil
+		},
+	)
+}