collector build (#38)

* how to build local collector

* with this config the local build collector is runnable!

Author: hilmarf

otel-collector/README.md

@@ -0,0 +1,20 @@
+# OpenTelemetry Collector (Audit-Logging)
+
+Let's build our own OTel-collector
+
+## TL;DR
+
+### build
+
+```bash
+go install go.opentelemetry.io/collector/cmd/builder@latest
+git clone git@github.com:open-telemetry/opentelemetry-collector.git
+cd opentelemetry-collector
+builder --config=$(realpath ../otel-collector/otelcol-builder.yaml)
+```
+
+### run
+
+```bash
+./_build/otelcol-audit --config=$(realpath ../otel-collector/config.yaml)
+```

otel-collector/config.yaml

@@ -12,6 +12,7 @@ exporters:
       queue_size: 10
       # block_on_queue_full: true  # not supported by opensearch exporter - https://github.com/hilmarf/opentelemetry-collector-contrib/tree/main/exporter/opensearchexporter
       storage: file_storage # Without storage, the queue is in memory and will be lost on restart.
+      sizer: requests
       num_consumers: 1
     retry_on_failure:
       enabled: true
@@ -22,7 +23,7 @@ extensions:
   health_check:
     endpoint: ${env:MY_POD_IP}:13133
   file_storage:
-    directory: /collector-volume
+    directory: /tmp/collector-volume
     create_directory: true
 processors:
   memory_limiter:

otel-collector/otelcol-builder.yaml

@@ -0,0 +1,33 @@
+# base: https://github.com/open-telemetry/opentelemetry-collector-releases/blob/main/distributions/otelcol-otlp/manifest.yaml
+dist:
+  name: otelcol-audit
+  description: OpenTelemetry Collector (Audit-Logging)
+  output_path: ./_build
+
+receivers:
+  - gomod: go.opentelemetry.io/collector/receiver/otlpreceiver v0.128.0
+
+processors:
+  - gomod: go.opentelemetry.io/collector/processor/batchprocessor v0.128.0
+  - gomod: go.opentelemetry.io/collector/processor/memorylimiterprocessor v0.128.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/resourceprocessor v0.128.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/processor/transformprocessor v0.128.0
+
+extensions:
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/healthcheckextension v0.128.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/extension/storage/filestorage v0.128.0
+
+providers:
+  # defaultStableOtelColVersion https://github.com/open-telemetry/opentelemetry-collector/blob/HEAD/cmd/builder/internal/builder/config.go#L21-L22
+  - gomod: go.opentelemetry.io/collector/confmap/provider/envprovider v1.34.0
+  - gomod: go.opentelemetry.io/collector/confmap/provider/fileprovider v1.34.0
+  #- gomod: go.opentelemetry.io/collector/confmap/provider/httpprovider v1.34.0
+  #- gomod: go.opentelemetry.io/collector/confmap/provider/httpsprovider v1.34.0
+  #- gomod: go.opentelemetry.io/collector/confmap/provider/yamlprovider v1.34.0
+
+exporters:
+  # defaultBetaOtelColVersion https://github.com/open-telemetry/opentelemetry-collector/blob/HEAD/cmd/builder/internal/builder/config.go#L21-L22
+  - gomod: go.opentelemetry.io/collector/exporter/otlpexporter v0.128.0
+  - gomod: go.opentelemetry.io/collector/exporter/otlphttpexporter v0.128.0
+  - gomod: github.com/open-telemetry/opentelemetry-collector-contrib/exporter/opensearchexporter v0.128.0
+  - gomod: go.opentelemetry.io/collector/exporter/debugexporter v0.128.0