Update generator image

Makefile

@@ -27,7 +27,7 @@ IMG = $(IMG_REGISTRY)/$(IMG_ORG)/$(IMG_NAME):$(VERSION)
 
 # The generator is a container image that provides a reproducible environment for
 # building eBPF binaries
-GEN_IMG ?= ghcr.io/grafana/beyla-generator:main
+GEN_IMG ?= ghcr.io/grafana/beyla-ebpf-generator:main
 
 COMPOSE_ARGS ?= -f test/integration/docker-compose.yml
 

generator.Dockerfile

@@ -1,51 +1,25 @@
-FROM ubuntu:oracular AS base
-
-ARG GOVERSION="1.23.3"
-
-ARG TARGETARCH
-
-RUN echo "using TARGETARCH: $TARGETARCH"
+FROM golang:alpine3.21 AS base
 
 # Installs dependencies that are required to compile eBPF programs
-RUN apt update -y
-RUN apt install -y curl git linux-headers-generic make llvm clang unzip libbpf-dev libbpf-tools linux-libc-dev linux-bpf-dev
-RUN apt clean
+RUN apk add clang llvm19
+RUN apk cache purge
+RUN go install github.com/cilium/ebpf/cmd/bpf2go@v0.16.0
 
 VOLUME ["/src"]
 
-WORKDIR /
-
-# Installs a fairly modern distribution of Go
-RUN curl -qL https://go.dev/dl/go$GOVERSION.linux-$TARGETARCH.tar.gz -o go.tar.gz
-RUN tar -xzf go.tar.gz
-RUN rm go.tar.gz
-
-ENV GOROOT /go
-RUN mkdir -p /gopath
-ENV GOPATH /gopath
-
-ENV GOBIN $GOPATH/bin
-ENV PATH $GOROOT/bin:$GOBIN:$PATH
-ENV TOOLS_DIR $GOBIN
-
-WORKDIR /tmp
-# Copies some pre-required Go dependencies to avoid downloading them on each build
-COPY Makefile Makefile
-COPY go.mod go.mod
-
-RUN make bpf2go
-
 WORKDIR /src
 
-# fix some arch-dependant missing include files
-FROM base AS base-arm64
-ENV C_INCLUDE_PATH=/usr/include/aarch64-linux-gnu
+FROM base AS builder
 
-FROM base AS base-amd64
-ENV C_INCLUDE_PATH=/usr/include/x86_64-linux-gnu
+RUN cat <<EOF > /generate.sh
+#!/bin/sh
+export BPF2GO=bpf2go
+export BPF_CLANG=clang
+export BPF_CFLAGS="-O2 -g -Wall -Werror"
+grep -rlI "BPF2GO" pkg/internal/ | xargs -P 0 -n 1 go generate
+EOF
 
-# Picks up the arch-specific base
-FROM base-$TARGETARCH AS builder
+RUN chmod +x /generate.sh
 
-ENTRYPOINT ["make", "generate"]
+ENTRYPOINT ["/generate.sh"]