grpc - replaced fortune-builder app with official greeter app (#7360)

images/go-grpc-greeter-server/Makefile

@@ -0,0 +1,55 @@
+# Copyright 2021 The Kubernetes Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# set default shell
+SHELL=/bin/bash -o pipefail -o errexit
+
+DIR:=$(strip $(shell dirname $(realpath $(lastword $(MAKEFILE_LIST)))))
+INIT_BUILDX=$(DIR)/../../hack/init-buildx.sh
+
+TAG ?=v$(shell date +%m%d%Y)-$(shell git rev-parse --short HEAD)
+REGISTRY ?= local
+
+IMAGE = $(REGISTRY)/go-grpc-greeter-server
+
+# required to enable buildx
+export DOCKER_CLI_EXPERIMENTAL=enabled
+
+# build with buildx
+PLATFORMS?=linux/amd64,linux/arm,linux/arm64,linux/s390x
+OUTPUT=
+PROGRESS=plain
+
+build: ensure-buildx
+	docker buildx build \
+		--platform=${PLATFORMS} $(OUTPUT) \
+		--progress=$(PROGRESS) \
+		--pull \
+		-t $(IMAGE):$(TAG) rootfs
+
+# push the cross built image
+push: OUTPUT=--push
+push: build
+
+# enable buildx
+ensure-buildx:
+# this is required for cloudbuild
+ifeq ("$(wildcard $(INIT_BUILDX))","")
+	@curl -sSL https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/hack/init-buildx.sh | bash
+else
+	@exec $(INIT_BUILDX)
+endif
+	@echo "done"
+
+.PHONY: build push ensure-buildx

images/go-grpc-greeter-server/cloudbuild.yaml

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+timeout: 1200s
+options:
+  substitution_option: ALLOW_LOOSE
+  # job builds a multi-arch docker image for amd64,arm,arm64 and s390x.
+  machineType: N1_HIGHCPU_8
+steps:
+  - name: gcr.io/k8s-testimages/gcb-docker-gcloud:v20210622-762366a
+    entrypoint: bash
+    env:
+      - DOCKER_CLI_EXPERIMENTAL=enabled
+      - TAG=$_GIT_TAG
+      - BASE_REF=$_PULL_BASE_REF
+      - REGISTRY=gcr.io/k8s-staging-ingress-nginx
+      # default cloudbuild has HOME=/builder/home and docker buildx is in /root/.docker/cli-plugins/docker-buildx
+      # set the home to /root explicitly to if using docker buildx
+      - HOME=/root
+    args:
+    - -c
+    - |
+      gcloud auth configure-docker \
+      && make push
+substitutions:
+  _GIT_TAG: "12345"
+  _PULL_BASE_REF: "master"

images/go-grpc-greeter-server/rootfs/Dockerfile

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+FROM golang:buster as build
+
+WORKDIR /go/src/greeter-server
+
+RUN curl -o main.go https://github.com/grpc/grpc-go/blob/91e0aeb192456225adf27966d04ada4cf8599915/examples/features/reflection/server/main.go && \
+  go mod init greeter-server && \
+  go mod tidy && \
+  go build -o /greeter-server main.go
+
+FROM gcr.io/distroless/base-debian10
+
+COPY --from=build /greeter-server /
+
+EXPOSE 50051
+
+CMD ["/greeter-server"]