Add workflow for pushing loadtester image

Signed-off-by: Stefan Prodan <stefan.prodan@gmail.com>

.github/workflows/push-ld.yml

@@ -0,0 +1,43 @@
+name: push-ld
+on:
+  workflow_dispatch:
+
+jobs:
+  build-push:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Prepare
+        id: prep
+        run: |
+          VERSION=$(grep 'VERSION' cmd/loadtester/main.go | head -1 | awk '{ print $4 }' | tr -d '"')
+          echo ::set-output name=BUILD_DATE::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+          echo ::set-output name=VERSION::${VERSION}
+      - name: Setup QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+      - name: Setup Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          buildkitd-flags: "--debug"
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: fluxcdbot
+          password: ${{ secrets.GHCR_TOKEN }}
+      - name: Publish image
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64
+          tags: |
+            ghcr.io/fluxcd/flagger-loadtester:${{ steps.prep.outputs.VERSION }}
+      - name: Check images
+        run: |
+          docker buildx imagetools inspect ghcr.io/fluxcd/flagger-loadtester:${{ steps.prep.outputs.VERSION }}

Dockerfile.loadtester

@@ -26,6 +26,27 @@ RUN HELM_TILLER_VERSION=0.9.3 && \
 curl -sSL "https://github.com/rimusz/helm-tiller/archive/v${HELM_TILLER_VERSION}.tar.gz" | tar xz -C /tmp && \
 mv /tmp/helm-tiller-${HELM_TILLER_VERSION} /tmp/helm-tiller
 
+FROM golang:1.17-alpine as go
+
+ARG TARGETPLATFORM
+ARG REVISON
+
+WORKDIR /workspace
+
+# copy modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+# cache modules
+RUN go mod download
+
+# copy source code
+COPY cmd/ cmd/
+COPY pkg/ pkg/
+
+# build
+RUN CGO_ENABLED=0 go build -o loadtester ./cmd/loadtester/*
+
 FROM bash:5.0
 
 RUN addgroup -S app && \
@@ -47,8 +68,6 @@ COPY --from=build /tmp/helm-tiller /tmp/helm-tiller
 
 ADD https://raw.githubusercontent.com/grpc/grpc-proto/master/grpc/health/v1/health.proto /tmp/ghz/health.proto
 
-COPY ./bin/loadtester .
-
 RUN chown -R app:app ./
 RUN chown -R app:app /tmp/ghz
 
@@ -61,4 +80,6 @@ RUN wrk -d 1s -c 1 -t 1 https://flagger.app > /dev/null && echo $? | grep 0
 # install Helm v2 plugins
 RUN helm init --stable-repo-url=https://charts.helm.sh/stable --client-only && helm plugin install /tmp/helm-tiller
 
+COPY --from=go --chown=app:app /workspace/loadtester .
+
 ENTRYPOINT ["./loadtester"]

Makefile

@@ -43,7 +43,6 @@ release:
 	git push origin "v$(VERSION)"
 
 loadtester-build:
-	CGO_ENABLED=0 GOOS=linux go build -a -installsuffix cgo -o ./bin/loadtester ./cmd/loadtester/*
 	docker build -t ghcr.io/fluxcd/flagger-loadtester:$(LT_VERSION) . -f Dockerfile.loadtester
 
 loadtester-push: