COSI-29: Produce multi-architecture Docker images

In the context of COSI driver, the driver should be usable on any OS
supported by Kubernetes. This will allow us to build arm64 images along
with already produced amd64 images

.github/workflows/ci.yml

@@ -35,6 +35,7 @@ jobs:
       packages: write
     uses: scality/workflows/.github/workflows/docker-build.yaml@v2
     with:
+      context: .
       name: cosi
       namespace: ${{ github.repository_owner }}
       tag: ${{ github.sha }}

.github/workflows/release.yml

@@ -13,9 +13,11 @@ jobs:
       packages: write
     uses: scality/workflows/.github/workflows/docker-build.yaml@v2
     with:
+      context: .
       name: cosi
       namespace: ${{ github.repository_owner }}
       tag: ${{ inputs.tag }}
+      platforms: linux/amd64,linux/arm64
 
   create-github-release:
     runs-on: ubuntu-latest

Dockerfile

@@ -1,17 +1,15 @@
 FROM golang:1.23.2 AS builder
+ARG TARGETOS
+ARG TARGETARCH
 
 WORKDIR /app
 
-ENV CGO_ENABLED=0 \
-    GOOS=linux \
-    GOARCH=amd64
-
 COPY go.mod go.sum ./
 RUN go mod download
 
 COPY . .
 
-RUN go build -o scality-cosi-driver ./cmd/scality-cosi-driver
+RUN CGO_ENABLED=0 GOOS=${TARGETOS:-linux} GOARCH=${TARGETARCH} go build -o scality-cosi-driver ./cmd/scality-cosi-driver
 
 FROM gcr.io/distroless/static:latest
 COPY --from=builder /app/scality-cosi-driver /scality-cosi-driver