peerpod-ctrl: use cross-compile to build faster

Use the host platform ($BUILDPLATFORM) and cross-compile the manager binary to speed up the build. Fixes confidential-containers#1601 Signed-off-by: Wainer dos Santos Moschetta <[email protected]>
wainersm · Nov 24, 2023 · 4ecff82 · 4ecff82
1 parent 1f2f9cb
commit 4ecff82
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/peerpod-ctrl/Dockerfile b/peerpod-ctrl/Dockerfile
@@ -1,5 +1,13 @@
 # Build the manager binary
-FROM --platform=$TARGETPLATFORM quay.io/confidential-containers/golang-fedora:1.20.8-38 as builder
+ARG BUILDER_BASE=quay.io/confidential-containers/golang-fedora:1.20.8-38
+ARG BASE=registry.fedoraproject.org/fedora:38
+
+# This dockerfile uses Go cross-compilation to build the binary,
+# we build on the host platform ($BUILDPLATFORM) and then copy the
+# binary into the container image of the target platform ($TARGETPLATFORM)
+# that was specified with --platform. For more details see:
+# https://www.docker.com/blog/faster-multi-platform-builds-dockerfile-cross-compilation-guide/
+FROM --platform=$BUILDPLATFORM $BUILDER_BASE as builder
 ARG TARGETOS
 ARG TARGETARCH
 ARG CGO_ENABLED=1
@@ -28,7 +36,7 @@ COPY controllers/ controllers/
 RUN CC=gcc CGO_ENABLED=${CGO_ENABLED} GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build ${GOFLAGS} -a -o manager main.go
 
 # Target Image
-FROM --platform=$TARGETPLATFORM registry.fedoraproject.org/fedora:38
+FROM --platform=$TARGETPLATFORM $BASE
 ARG CGO_ENABLED=1
 
 RUN if [ "$CGO_ENABLED" = 1 ] ; then dnf install -y libvirt-libs openssh-clients && dnf clean all; fi