Pushing containers and running on Google Cloud

rules_docker provides a container_push rule which can be used to push the container to a container/artifact registry. We'll provide an example of doing that and then using Google Cloud Run to launch our gRPC server container on Google Cloud.

You'll need gcloud and docker installed for these instructions to work.

Setting up artifact registry

Google's artifact-registry instructions say you can use the following to create the artifact registry instance we'll use below:

gcloud artifacts repositories create quickstart-docker-repo --repository-format=docker \
--location=us-central1 --description="Docker repository"

Then we need to configure authentication:

gcloud auth configure-docker us-central1-docker.pkg.dev

Pushing the container

We're going to add the container_push instructions to $HOME/repo/src/services/summation/BUILD by adding:

load("@io_bazel_rules_docker//container:container.bzl", "container_push")

### ... existing lines in file

container_push(
   name = "server_push",
   image = ":server_image",
   format = "Docker",
   registry = "us-central1-docker.pkg.dev",
   repository = "%YOUR_PROJECT_NAME%/quickstart-docker-repo/server-image",
   tag = "dev",
)

You'll need to change %YOUR_PROJECT_NAME% to your Google cloud project name for this to work.

Now you can push a new image using bazel run:

bazel run -c opt //src/services/summation:server_push

If that succeeds it should tell you where the image was pushed and the sha256.

Running on Google Cloud Run

Now we can start a cloud run service using our pushed image by running gcloud run deploy [SERVICE_NAME] --image [IMAGE_URL]. Let's try it with some additional arguments

gcloud run deploy hello-bazel-service \
  --image us-central1-docker.pkg.dev/%YOUR_PROJECT_NAME%/quickstart-docker-repo/server-image:dev \
  --allow-unauthenticated \
  --region us-central1

You'll need to change %YOUR_PROJECT_NAME% to your Google cloud project name.

This should output a service url you can use to hit the service. Something like https://hello-bazel-service-abcde-uc.a.run.app. Let's test your service using that and grpcurl again.

grpcurl -proto src/proto/summation/summation.proto -d '{"value": 5.0, "value": 2.0}' hello-bazel-service-hxqyynk4pa-uc.a.run.app:443  src_proto_summation.Summation/ComputeSumF64

You should see it return ```json { "sum": 7 }

Congratulations!