cmd/godoc: add cloud build config

Deploys no longer depend on Docker.

With only Make and gcloud installed, the following should deploy a new version:

$ git clone https://go.googlesource.com/tools
$ cd tools
$ cd cmd/godoc
$ make cloud-build deploy

Updates golang/go#27205.

Change-Id: I5cc1142e02dc288450d55dbd4da4b30c0a080bd5
Reviewed-on: https://go-review.googlesource.com/c/139240
Reviewed-by: Brad Fitzpatrick <[email protected]>

Author: broady

cmd/godoc/Dockerfile.prod

@@ -44,6 +44,7 @@ RUN echo "requested go ref: ${GO_REF}" >> /goroot/buildinfo
 RUN echo "x/tools HEAD: ${TOOLS_HEAD}" >> /goroot/buildinfo
 RUN echo "x/tools clean: ${TOOLS_CLEAN}" >> /goroot/buildinfo
 RUN echo "image: ${DOCKER_TAG}" >> /goroot/buildinfo
+RUN echo "build env: ${BUILD_ENV}" >> /goroot/buildinfo
 
 RUN rm -rf /goroot/.git
 

cmd/godoc/Makefile

@@ -19,14 +19,23 @@ usage:
 	@echo "See Makefile and README.godoc-app"
 	@exit 1
 
+cloud-build: Dockerfile.prod
+	gcloud builds submit \
+		--project=$(GCP_PROJECT) \
+		--config=cloudbuild.yaml \
+		--substitutions=_GO_REF=$(GO_REF),_TOOLS_HEAD=$(TOOLS_HEAD),_TOOLS_CLEAN=$(TOOLS_CLEAN),_DOCKER_TAG=$(DOCKER_TAG) \
+		../.. # source code
+
 docker-build: Dockerfile.prod
 	# NOTE(cbro): move up in directory to include entire tools repo.
+	# NOTE(cbro): any changes made to this command must also be made in cloudbuild.yaml.
 	cd ../..; docker build \
-		-f cmd/godoc/Dockerfile.prod \
-		--build-arg GO_REF=$(GO_REF) \
-		--build-arg TOOLS_HEAD=$(TOOLS_HEAD) \
-		--build-arg TOOLS_CLEAN=$(TOOLS_CLEAN) \
-		--build-arg DOCKER_TAG=$(DOCKER_TAG) \
+		-f=cmd/godoc/Dockerfile.prod \
+		--build-arg=GO_REF=$(GO_REF) \
+		--build-arg=TOOLS_HEAD=$(TOOLS_HEAD) \
+		--build-arg=TOOLS_CLEAN=$(TOOLS_CLEAN) \
+		--build-arg=DOCKER_TAG=$(DOCKER_TAG) \
+		--build-arg=BUILD_ENV=local \
 		--tag=$(DOCKER_TAG) \
 		.
 

cmd/godoc/README.godoc-app

@@ -66,9 +66,13 @@ godoc should come up at http://localhost:8080
 Deploying to golang.org
 -----------------------
 
+Make sure you're signed in to gcloud:
+
+  gcloud auth login
+
 Build the image, push it to gcr.io, and deploy to Flex:
 
-  make docker-push deploy
+  make cloud-build deploy
 
 Point the load balancer to the newly deployed version:
 (This also runs regression tests)

cmd/godoc/cloudbuild.yaml

@@ -0,0 +1,25 @@
+# Copyright 2018 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+# NOTE(cbro): any changes to the docker command must also be
+# made in docker-build in the Makefile.
+#
+# Variable substitutions must have a preceding underscore. See:
+# https://cloud.google.com/cloud-build/docs/configuring-builds/substitute-variable-values#using_user-defined_substitutions
+steps:
+- name: 'gcr.io/cloud-builders/docker'
+  args: [
+    'build',
+    '-f=cmd/godoc/Dockerfile.prod',
+    '--build-arg=GO_REF=${_GO_REF}',
+    '--build-arg=TOOLS_HEAD=${_TOOLS_HEAD}',
+    '--build-arg=TOOLS_CLEAN=${_TOOLS_CLEAN}',
+    '--build-arg=DOCKER_TAG=${_DOCKER_TAG}',
+    '--build-arg=BUILD_ENV=cloudbuild',
+    '--tag=${_DOCKER_TAG}',
+    '.',
+  ]
+images: ['${_DOCKER_TAG}']
+options:
+  machineType: 'N1_HIGHCPU_8' # building the godoc index takes a lot of memory.