[exporter/influxdbexporter] Add support for exporting to InfluxDB v1.…

…x API (#16042)

Add support for exporting to InfluxDB v1.x API

Co-authored-by: Alex Boten <[email protected]>

.chloggen/feat_influxdb-1x.yaml

@@ -0,0 +1,16 @@
+# 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: influxdbexporter
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Add support for exporting to InfluxDB v1.X API
+
+# One or more tracking issues related to the change
+issues: [16042]
+
+# (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:

exporter/influxdbexporter/README.md

@@ -21,6 +21,11 @@ The following configuration options are supported:
 * `org` (required) Name of InfluxDB organization that owns the destination bucket
 * `bucket` (required) name of InfluxDB bucket to which signals will be written
 * `token` (optional) The authentication token for InfluxDB
+* `v1_compatibility` (optional) Options for exporting to InfluxDB v1.x
+  * `enabled` (optional) Use InfluxDB v1.x API if enabled
+  * `db` (required if enabled) Name of the InfluxDB database to which signals will be written
+  * `username` (optional) Basic auth username for authenticating with InfluxDB v1.x
+  * `password` (optional) Basic auth password for authenticating with InfluxDB v1.x
 * `metrics_schema` (default = telegraf-prometheus-v1) The chosen metrics schema to write; must be one of:
   * `telegraf-prometheus-v1`
   * `telegraf-prometheus-v2`

exporter/influxdbexporter/config.go

@@ -28,6 +28,18 @@ const (
 	stability = component.StabilityLevelBeta
 )
 
+// V1Compatibility is used to specify if the exporter should use the v1.X InfluxDB API schema.
+type V1Compatibility struct {
+	// Enabled is used to specify if the exporter should use the v1.X InfluxDB API schema
+	Enabled bool `mapstructure:"enabled"`
+	// DB is used to specify the name of the V1 InfluxDB database that telemetry will be written to.
+	DB string `mapstructure:"db"`
+	// Username is used to optionally specify the basic auth username
+	Username string `mapstructure:"username"`
+	// Password is used to optionally specify the basic auth password
+	Password string `mapstructure:"password"`
+}
+
 // Config defines configuration for the InfluxDB exporter.
 type Config struct {
 	config.ExporterSettings       `mapstructure:",squash"`
@@ -41,6 +53,8 @@ type Config struct {
 	Bucket string `mapstructure:"bucket"`
 	// Token is used to identify InfluxDB permissions within the organization.
 	Token string `mapstructure:"token"`
+	// V1Compatibility is used to specify if the exporter should use the v1.X InfluxDB API schema.
+	V1Compatibility V1Compatibility `mapstructure:"v1_compatibility"`
 
 	// MetricsSchema indicates the metrics schema to emit to line protocol.
 	// Options:

exporter/influxdbexporter/writer.go

@@ -17,6 +17,7 @@ package influxdbexporter // import "github.com/open-telemetry/opentelemetry-coll
 import (
 	"bytes"
 	"context"
+	"encoding/base64"
 	"fmt"
 	"io"
 	"net/http"
@@ -45,21 +46,39 @@ func newInfluxHTTPWriter(logger common.Logger, config *Config, host component.Ho
 		return nil, err
 	}
 	if writeURL.Path == "" || writeURL.Path == "/" {
-		writeURL, err = writeURL.Parse("api/v2/write")
-		if err != nil {
-			return nil, err
+		if config.V1Compatibility.Enabled {
+			writeURL, err = writeURL.Parse("write")
+			if err != nil {
+				return nil, err
+			}
+		} else {
+			writeURL, err = writeURL.Parse("api/v2/write")
+			if err != nil {
+				return nil, err
+			}
 		}
 	}
 	queryValues := writeURL.Query()
-	queryValues.Set("org", config.Org)
-	queryValues.Set("bucket", config.Bucket)
 	queryValues.Set("precision", "ns")
-	writeURL.RawQuery = queryValues.Encode()
 
-	if config.Token != "" {
-		config.HTTPClientSettings.Headers["Authorization"] = "Token " + config.Token
+	if config.V1Compatibility.Enabled {
+		queryValues.Set("db", config.V1Compatibility.DB)
+
+		if config.V1Compatibility.Username != "" && config.V1Compatibility.Password != "" {
+			var basicAuth []byte
+			base64.StdEncoding.Encode(basicAuth, []byte(config.V1Compatibility.Username+":"+config.V1Compatibility.Password))
+			config.HTTPClientSettings.Headers["Authorization"] = "Basic " + string(basicAuth)
+		}
+	} else {
+		queryValues.Set("org", config.Org)
+		queryValues.Set("bucket", config.Bucket)
+
+		if config.Token != "" {
+			config.HTTPClientSettings.Headers["Authorization"] = "Token " + config.Token
+		}
 	}
 
+	writeURL.RawQuery = queryValues.Encode()
 	httpClient, err := config.HTTPClientSettings.ToClient(host, settings)
 	if err != nil {
 		return nil, err