[beatreceiver] Add e2e tests for tcp and udp inputs

x-pack/filebeat/test.log

@@ -0,0 +1,5 @@
+2026/07/03 14:21:05 testbin.Build (go test -c -o /Users/khushijain/Documents/beats/x-pack/filebeat/filebeat.test) took 1.180735042s.
+=== RUN   TestTCPInputOTelE2E
+--- PASS: TestTCPInputOTelE2E (16.32s)
+PASS
+ok  	github.com/elastic/beats/v7/x-pack/filebeat/tests/integration	20.074s

x-pack/filebeat/tests/integration/otel_tcp_udp_test.go

@@ -0,0 +1,294 @@
+// Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+// or more contributor license agreements. Licensed under the Elastic License;
+// you may not use this file except in compliance with the Elastic License.
+
+//go:build integration
+
+package integration
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+	"net"
+	"strings"
+	"testing"
+	"text/template"
+	"time"
+
+	"github.com/gofrs/uuid/v5"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+
+	"github.com/elastic/beats/v7/filebeat/input/net/nettest"
+	libbeattesting "github.com/elastic/beats/v7/libbeat/testing"
+	"github.com/elastic/beats/v7/libbeat/tests/integration"
+	"github.com/elastic/beats/v7/x-pack/otel/oteltest"
+	"github.com/elastic/beats/v7/x-pack/otel/oteltestcol"
+	"github.com/elastic/elastic-agent-libs/testing/estools"
+)
+
+const (
+	tcpInputTestMsg = "tcp-input-otel-e2e-test-event"
+	udpInputTestMsg = "udp-input-otel-e2e-test-event"
+)
+
+func TestTCPInputOTelE2E(t *testing.T) {
+	ports := libbeattesting.MustAvailableTCP4Ports(t, 2)
+	runSocketInputOTelE2E(
+		t,
+		"tcp",
+		tcpInputTestMsg,
+		hostAddress(ports[0]),
+		hostAddress(ports[1]),
+		nettest.RunTCPClient,
+	)
+}
+
+func TestUDPInputOTelE2E(t *testing.T) {
+	ports := libbeattesting.MustAvailableTCP4Ports(t, 2)
+	runSocketInputOTelE2E(
+		t,
+		"udp",
+		udpInputTestMsg,
+		hostAddress(ports[0]),
+		hostAddress(ports[1]),
+		nettest.RunUDPClient,
+	)
+}
+
+type socketClientFn func(t *testing.T, address string, data []string)
+
+func runSocketInputOTelE2E(
+	t *testing.T,
+	inputType, testMessage, otelAddress, fbAddress string,
+	runClient socketClientFn,
+) {
+	t.Helper()
+	integration.EnsureESIsRunning(t)
+
+	otelHome := t.TempDir()
+
+	host := integration.GetESURL(t, "http")
+	user := host.User.Username()
+	password, _ := host.User.Password()
+
+	otelNamespace := strings.ReplaceAll(uuid.Must(uuid.NewV4()).String(), "-", "")
+	fbNamespace := strings.ReplaceAll(uuid.Must(uuid.NewV4()).String(), "-", "")
+
+	otelIndex := "logs-integration-" + otelNamespace
+	fbIndex := "logs-integration-" + fbNamespace
+
+	data := []string{testMessage}
+
+	type options struct {
+		InputType string
+		Index     string
+		ESURL     string
+		Username  string
+		Password  string
+		Host      string
+		PathHome  string
+	}
+
+	filebeatConfig := `filebeat.inputs:
+- type: {{ .InputType }}
+  id: {{ .InputType }}-input-e2e
+  host: {{ .Host }}
+
+output:
+  elasticsearch:
+    hosts:
+      - {{ .ESURL }}
+    username: {{ .Username }}
+    password: {{ .Password }}
+    index: {{ .Index }}
+
+queue.mem.flush.timeout: 0s
+setup.template.enabled: false
+processors:
+    - add_host_metadata: ~
+    - add_cloud_metadata: ~
+    - add_docker_metadata: ~
+    - add_kubernetes_metadata: ~
+`
+
+	otelConfig := `exporters:
+    elasticsearch:
+        auth:
+            authenticator: beatsauth
+        compression: gzip
+        compression_params:
+            level: 1
+        endpoints:
+            - {{ .ESURL }}
+        logs_index: {{ .Index }}
+        max_conns_per_host: 1
+        password: {{ .Password }}
+        retry:
+            enabled: true
+            initial_interval: 1s
+            max_interval: 1m0s
+            max_retries: 3
+        sending_queue:
+            batch:
+                flush_timeout: 10s
+                max_size: 1600
+                min_size: 0
+                sizer: items
+            block_on_overflow: true
+            enabled: true
+            num_consumers: 1
+            queue_size: 3200
+            wait_for_result: true
+        user: {{ .Username }}
+extensions:
+    beatsauth:
+        idle_connection_timeout: 3s
+        proxy_disable: false
+        timeout: 1m30s
+receivers:
+    filebeatreceiver:
+        filebeat:
+            inputs:
+                - type: {{ .InputType }}
+                  id: {{ .InputType }}-input-e2e
+                  host: {{ .Host }}
+        processors:
+            - add_host_metadata: ~
+            - add_cloud_metadata: ~
+            - add_docker_metadata: ~
+            - add_kubernetes_metadata: ~
+        queue.mem.flush.timeout: 0s
+        setup.template.enabled: false
+        path.home: {{ .PathHome }}
+service:
+    extensions:
+        - beatsauth
+    pipelines:
+        logs:
+            exporters:
+                - elasticsearch
+            receivers:
+                - filebeatreceiver
+    telemetry:
+        metrics:
+            level: none
+`
+
+	optionsValue := options{
+		InputType: inputType,
+		ESURL:     fmt.Sprintf("%s://%s", host.Scheme, host.Host),
+		Username:  user,
+		Password:  password,
+		PathHome:  otelHome,
+	}
+
+	var configBuffer bytes.Buffer
+	optionsValue.Host = otelAddress
+	optionsValue.Index = otelIndex
+	require.NoError(t, template.Must(template.New("config").Parse(otelConfig)).Execute(&configBuffer, optionsValue))
+
+	oteltestcol.New(t, configBuffer.String())
+
+	configBuffer.Reset()
+
+	optionsValue.Host = fbAddress
+	optionsValue.Index = fbIndex
+	require.NoError(t, template.Must(template.New("config").Parse(filebeatConfig)).Execute(&configBuffer, optionsValue))
+
+	filebeat := integration.NewBeat(
+		t,
+		"filebeat",
+		"../../filebeat.test",
+	)
+	filebeat.WriteConfigFile(configBuffer.String())
+	filebeat.Start()
+	defer filebeat.Stop()
+
+	filebeat.WaitLogsContainsAnyOrder(
+		[]string{
+			"filebeat start running",
+		},
+		20*time.Second,
+		"filebeat did not run",
+	)
+
+	require.EventuallyWithTf(t, func(ct *assert.CollectT) {
+		conn, err := net.Dial(inputType, otelAddress)
+		assert.NoError(ct, err, "otel %s input not listening on %s", inputType, otelAddress)
+		if conn != nil {
+			_ = conn.Close()
+		}
+	}, 30*time.Second, 100*time.Millisecond, "otel %s input not listening on %s", inputType, otelAddress)
+
+	go runClient(t, otelAddress, data)
+	go runClient(t, fbAddress, data)
+
+	es := integration.GetESClient(t, "http")
+
+	t.Cleanup(func() {
+		_, err := es.Indices.DeleteDataStream([]string{
+			otelIndex,
+			fbIndex,
+		})
+		require.NoError(t, err, "failed to delete data streams")
+	})
+
+	rawQuery := map[string]any{
+		"query": map[string]any{
+			"bool": map[string]any{
+				"must": []map[string]any{
+					{
+						"match_phrase": map[string]any{
+							"input.type": inputType,
+						},
+					},
+					{
+						"match_phrase": map[string]any{
+							"message": testMessage,
+						},
+					},
+				},
+			},
+		},
+		"sort": []map[string]any{
+			{"@timestamp": map[string]any{"order": "asc"}},
+		},
+	}
+
+	var filebeatDocs estools.Documents
+	var otelDocs estools.Documents
+	var err error
+
+	require.EventuallyWithTf(t,
+		func(ct *assert.CollectT) {
+			findCtx, findCancel := context.WithTimeout(t.Context(), 900*time.Millisecond)
+			defer findCancel()
+
+			otelDocs, err = estools.PerformQueryForRawQuery(findCtx, rawQuery, ".ds-"+otelIndex+"*", es)
+			assert.NoError(ct, err)
+			assert.GreaterOrEqual(ct, otelDocs.Hits.Total.Value, 1, "expected at least 1 otel document, got %d", otelDocs.Hits.Total.Value)
+
+			filebeatDocs, err = estools.PerformQueryForRawQuery(findCtx, rawQuery, ".ds-"+fbIndex+"*", es)
+			assert.NoError(ct, err)
+			assert.GreaterOrEqual(ct, filebeatDocs.Hits.Total.Value, 1, "expected at least 1 filebeat document, got %d", filebeatDocs.Hits.Total.Value)
+		},
+		3*time.Minute, 1*time.Second, "expected at least 1 document for both filebeat and otel modes")
+
+	filebeatDoc := filebeatDocs.Hits.Hits[0].Source
+	otelDoc := otelDocs.Hits.Hits[0].Source
+	ignoredFields := []string{
+		"@timestamp",
+		"agent.ephemeral_id",
+		"agent.id",
+		"log.source.address",
+	}
+
+	oteltest.AssertMapsEqual(t, filebeatDoc, otelDoc, ignoredFields, "expected documents to be equal")
+}
+
+// HostAddress returns the host:port address used by net input integration tests.
+func hostAddress(port uint16) string {
+	return fmt.Sprintf("127.0.0.1:%d", port)
+}