k8s-deploy — automate deployments to Google Kubernetes Engine

• Introduction
• Installation
• Configuration
• Tasks
• Contributing
• License

Introduction

This gem provides a bunch of useful Rake tasks to automate deployment to the Kubernetes cluster in Google Kubernetes Engine (GKE):

• Show configuration for the environment.
• Show the status of running Deployment & Pods.
• Check GCloud/K8s configuration and GIT (branch, uncommitted changes, etc.).
• Build a new Docker image, push it to the registry, and patch Deployment.
• Rollback Deployment to the previous state.
• Scale Deployment to the desired number of replicas.

Installation

Bundler

Add the gem to your Gemfile:

gem 'k8s-deploy'

Manual

Invoke the following command from your terminal:

gem install k8s-deploy

Configuration

1. Put the k8s-deploy.yml configuration file into your project root.
2. Add require 'k8s-deploy/tasks' line to your Rakefile.
3. Check available tasks with rake -T command.

Example of k8s-deploy.yml

production: # environment name
  git_branch: master
  dockerfile: ./Dockerfile
  docker_platform: linux/amd64
  container_registry: gcr.io
  gcloud_project_name: your-gcloud-project-name
  kubernetes_context: your-cluster-context
  kubernetes_deployment_name: your-deployment-name
  kubernetes_template_name: your-template-name
  kubernetes_docker_image_name: your-dcoker-image-name

You could add as many environments as you need (production, staging, test, etc.) to k8s-deploy.yml.

Example of Rakefile file

require 'k8s-deploy/tasks'

Example of rake -T output

rake k8s:production:check                         # Check production ready for deploy
rake k8s:production:check:gcloud                  # Check production GCloud
rake k8s:production:check:git                     # Check production GIT
rake k8s:production:configuration                 # Show production configuration
rake k8s:production:deploy                        # Deploy to production
rake k8s:production:deploy:build                  # Build container for production
rake k8s:production:deploy:deployment_patch       # Deployment patch for production
rake k8s:production:deploy:push                   # Push container for production
rake k8s:production:deploy:rollback               # Rollback last deployment to production
rake k8s:production:deploy:scale[replicas_count]  # Scale deployment production
rake k8s:production:status                        # Show production K8s status
rake k8s:production:status:deployment             # Show production K8s Deployment status
rake k8s:production:status:docker_image           # Show production K8s Deployment status
rake k8s:production:status:pods                   # Show production K8s Pods status

Tasks

All tasks have next structure:

rake k8s:<environment>:<main-task>:<sub-task>

Main tasks

Show configuration for the environment:

rake k8s:<environment>:configuration

Show the status of running Deployment & Pods:

rake k8s:<environment>:status

Check GCloud/K8s configuration and GIT (branch, uncommitted changes, etc.):

rake k8s:<environment>:check

Build a new Docker image, push it to the registry, and patch Deployment:

rake k8s:<environment>:deploy

Rollback Deployment to the previous state.

rake k8s:<environment>:rollback

Scale Deployment to the desired number of replicas.

rake k8s:<environment>:scale[1]

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/syngenta/k8s-deploy.

Please, check our Contribution guide for more details.

This project adheres to the Code of Conduct. We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and healthy community.

License

The project uses the MIT License. See LICENSE for details.