Use native ARM builders for container builds

This commit replaces #1088 and attempts to build a lading multi-platform
image by use of organization provided ARM native builders. Unsure if this'll
work but I figure it's worth a shot.

Signed-off-by: Brian L. Troutwine <brian.troutwine@datadoghq.com>

.github/workflows/container.yml

@@ -8,8 +8,15 @@ env:
   IMAGE_NAME: ${{ github.repository }}
 
 jobs:
-  container:
-    runs-on: ubuntu-20.04
+  build:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - arch: amd64
+            runner: ubuntu-20.04
+          - arch: arm64
+            runner: arm-4core-linux-ubuntu24.04
     permissions:
       contents: read
       packages: write
@@ -47,9 +54,50 @@ jobs:
         with:
           file: Dockerfile
           builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/${{ matrix.arch }}
+          tags: |
+            ${{ steps.meta.outputs.tags }}
+            ${{ steps.meta.outputs.tags }}-${{ matrix.arch }}
           push: true
-          platforms: linux/amd64, linux/arm64
-          tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          cache-from: type=gha, scope=${{ github.workflow }}
-          cache-to: type=gha, scope=${{ github.workflow }}
+          cache-from: type=registry,ref=ghcr.io/datadog/lading:latest
+          cache-to: type=registry,ref=ghcr.io/datadog/lading:latest,mode=max
+
+  manifest:
+    name: Create Multi-Arch Manifest
+    needs: build
+    runs-on: ubuntu-20.04
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Log in to Container Registry
+        uses: docker/login-action@v3.3.0
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3.7.1
+
+      - name: Extract Docker Metadata
+        uses: docker/metadata-action@v5.5.1
+        id: meta
+        with:
+          tags: |
+            type=sha,format=long
+            type=ref,prefix=pr-,event=pr
+            type=semver,pattern={{version}},event=tag
+            type=semver,pattern={{major}}.{{minor}},event=tag
+            type=semver,pattern={{major}},event=tag
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Create and Push Multi-Arch Manifest
+        run: |
+          docker manifest create ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags }} \
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags }}-amd64 \
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags }}-arm64
+
+          docker manifest push ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.meta.outputs.tags }}

Dockerfile

@@ -1,5 +1,5 @@
 # Update the rust version in-sync with the version in rust-toolchain.toml
-FROM docker.io/rust:1.81.0-bullseye AS builder
+FROM --platform=$BUILDPLATFORM docker.io/rust:1.81.0-bullseye AS builder
 
 RUN apt-get update && apt-get install -y \
     protobuf-compiler fuse3 libfuse3-dev \
@@ -9,7 +9,7 @@ WORKDIR /app
 COPY . /app
 RUN cargo build --release --locked --bin lading
 
-FROM docker.io/debian:bullseye-20240701-slim
+FROM --platform=$BUILDPLATFORM  docker.io/debian:bullseye-20240701-slim
 RUN apt-get update && apt-get install -y libfuse3-dev=3.10.3-2 fuse3=3.10.3-2 && rm -rf /var/lib/apt/lists/*
 COPY --from=builder /app/target/release/lading /usr/bin/lading