fix: Add missing otelcol alias to make OTel Engine work with OTel Collector helm chart

Dockerfile

@@ -61,6 +61,11 @@ RUN apt-get update \
 COPY --from=build --chown=${UID}:${UID} /src/alloy/build/alloy /bin/alloy
 COPY --chown=${UID}:${UID} example-config.alloy /etc/alloy/config.alloy
 
+# Provide /bin/otelcol compatibility entrypoint. Useful when using Alloy's OTel Engine with
+# OpenTelemetry Collector helm chart and other ecosystem tools that expect otelcol binary.
+COPY packaging/docker/otelcol.sh /bin/otelcol
+RUN chmod 755 /bin/otelcol
+
 # Create alloy user in container, but do not set it as default
 #
 # NOTE: non-root support in Docker containers is an experimental,

Dockerfile.windows

@@ -89,6 +89,10 @@ FROM ${BASE_IMAGE_WINDOWS}
 COPY --from=builder ["/src/alloy/build/alloy", "C:/Program Files/GrafanaLabs/Alloy/alloy.exe"]
 COPY --from=builder ["/src/alloy/example-config.alloy", "C:/Program Files/GrafanaLabs/Alloy/config.alloy"]
 
+# Provide otelcol compatibility entrypoint. Useful when using Alloy's OTel Engine with
+# OpenTelemetry Collector helm chart and other ecosystem tools that expect otelcol binary.
+COPY ["packaging/docker/otelcol.cmd", "C:/Program Files/GrafanaLabs/Alloy/otelcol.cmd"]
+
 ENTRYPOINT ["C:/Program Files/GrafanaLabs/Alloy/alloy.exe"]
 ENV ALLOY_DEPLOY_MODE=docker
 CMD ["run", "C:/Program Files/GrafanaLabs/Alloy/config.alloy", "--storage.path=C:/ProgramData/GrafanaLabs/Alloy/data"]

packaging/docker/otelcol.cmd

@@ -0,0 +1,4 @@
+@echo off
+REM Compatibility wrapper for OpenTelemetry Collector integrations.
+REM Delegate to Alloy's OTel engine and pass through all arguments.
+"C:\Program Files\GrafanaLabs\Alloy\alloy.exe" otel %*

packaging/docker/otelcol.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env sh
+# Compatibility wrapper for OpenTelemetry Collector integrations.
+# Delegate to Alloy's OTel engine and pass through all arguments.
+exec /bin/alloy otel "$@"