build: attempt multi-platform build

Co-authored-by: Tommy Trøen <[email protected]>
Co-authored-by: Kim Tore Jensen <[email protected]>

Author: 3 people

.github/workflows/build.yml

@@ -26,4 +26,5 @@ jobs:
           google_service_account: gh-texas
           push: true
           push_ghcr: true
+          multi-platform: 'true'
           workload_identity_provider: ${{ secrets.NAIS_IO_WORKLOAD_IDENTITY_PROVIDER }}

Dockerfile

@@ -1,10 +1,34 @@
-FROM rust:alpine AS builder
-RUN apk add musl-dev
-COPY . /src
-WORKDIR /src
-RUN cargo build --release
+FROM --platform=$BUILDPLATFORM rust:1 as builder
+
+WORKDIR /build
+ARG TARGETPLATFORM
+RUN \
+    set -eux ; \
+    if [ "$TARGETPLATFORM" = "linux/amd64" ]; then \
+        apt-get --yes update && apt-get --yes install cmake musl-tools ; \
+        rustup target add x86_64-unknown-linux-musl ; \
+    elif [ "$TARGETPLATFORM" = "linux/arm64" ]; then \
+        apt-get --yes update && apt-get --yes install cmake musl-tools gcc-aarch64-linux-gnu ; \
+        rustup target add aarch64-unknown-linux-musl ; \
+    fi
+
+COPY . .
+
+RUN \
+    set -eux ; \
+    if [ "$TARGETPLATFORM" = "linux/amd64" ]; then \
+        export TARGET=x86_64-unknown-linux-musl ; \
+    elif [ "$TARGETPLATFORM" = "linux/arm64" ]; then \
+        export TARGET=aarch64-unknown-linux-musl ; \
+        export CARGO_TARGET_AARCH64_UNKNOWN_LINUX_MUSL_LINKER=aarch64-linux-gnu-gcc ; \
+        export CC_aarch64_unknown_linux_musl=aarch64-linux-gnu-gcc ; \
+        export CXX_aarch64_unknown_linux_musl=aarch64-linux-gnu-g++ ; \
+    fi ; \
+    cargo test --release --target ${TARGET} -- --test-threads 1 ; \
+    cargo build --release --target ${TARGET} && mkdir -p target/final/release/ && mv target/${TARGET}/release/texas target/final/release/texas ; \
+    file target/final/release/texas
 
 FROM gcr.io/distroless/static-debian12:nonroot
 WORKDIR /app
-COPY --from=builder /src/target/release/texas /app/texas
+COPY --from=builder /build/target/final/release/texas /app/texas
 CMD ["/app/texas"]

src/main.rs

@@ -17,7 +17,7 @@ pub mod config {
     #[command(version, about, long_about = None)]
     pub struct Config {
         #[arg(short, long, env, default_value = "127.0.0.1:3000")]
-        pub bind_address: String,
+        pub bind_addr: String,
         #[arg(env)]
         pub maskinporten_client_id: String,
         #[arg(env)]
@@ -72,7 +72,7 @@ async fn main() {
         .route("/token", post(handlers::token)).with_state(state.clone())
         .route("/introspection", post(handlers::introspection).with_state(state.clone()));
 
-    let listener = tokio::net::TcpListener::bind(cfg.bind_address).await.unwrap();
+    let listener = tokio::net::TcpListener::bind(cfg.bind_addr).await.unwrap();
 
     info!("Serving on {:?}", listener.local_addr().unwrap());