Multi Region Cloud Run

This repository contains the partner codebase for Rob Charlwood's Medium tutorial - "Multi Region Load Balancing with GO and Google Cloud Run - Part 1".

Checkout and setup

To work with this codebase, you will require the below to be setup and configured on your machine.

• golang at version 1.14.4 or newer (if you want to make changes to the API code)
• docker- For compiling and building the container image
• make - If you wish to use the repo's included Makefile

If you wish to use the pre-commit hooks included in this repository, you'll also need:

• python at version 3.8.2 - I suggest installing via pyenv for isolation.
• Python's poetry library installed against 3.8.2

To set this codebase up on your machine, you can run the following commands:

git clone git@github.com:robcharlwood/multi-region-cloud-run.git
cd multi-region-cloud-run

If you'd like the pre-commit hooks installed, then you also need to run:

make install

The Makefile checks that you have all the required things at the required versions and make install will setup a local .venv environment and install pre-commit into it. It will then setup the pre-commit hooks so that the below commands are run locally before a commit can be pushed:

• go fmt
• go vet
• go test
• go build
• go mod tidy

Building the docker image

The Makefile also provides a make build command that will build an image from the Dockerfile and push it up to Google Container Registry. Please note that in order for the make build command to work, you'll need to ensure you have set the relevant environment variables first. I suggest adding a .env file into the project root and then exporting your vars in there. You can then source the .env file before running the make command.

e.g

.env

export registry=eu.gcr.io
export project=my_project
export image_name=my_image

Then you could run the build command like so:

source .env && make build

Note that the make build command also accepts a command line argument for version. This allows you to build the image at a specific version number. e.g.

source .env && make build version=1.0.0

The make build command also assumes that you have followed the tutorial and stored your terraform service account JSON key in a .keys directory in the root of the project and named it terraform.json. If this is not the case, you'll need to tweak the build command accordingly.

Running the API locally

To run the sample application locally, ensure that you have golang 1.14.4 installed and then run:

go run main.go

This will boot up a server at the following address: http://localhost:8080

Tests

The sample API's test suite can be run using the below command:

go test

Continuous Integration

This project uses Travis CI for continuous integration. This platform runs the project tests automatically when a PR is raised or merged.

Versioning

This project uses git for versioning. For the available versions, see the tags on this repository.

Authors

• Rob Charlwood - Bitniftee Limited

Changes

Please see the CHANGELOG.md file additions, changes, deletions and fixes between each version

License

This project is licensed under the CC0-1.0 License - please see the LICENSE.md file for details