K8s deploy

Introduction

💣 Important — this gem is not production ready.

This gem provides bunch of useful Rake tasks to automate deploy to Kubernetes cluster in Google Container Engine.

Installation

Bundler

Add gem to your Gemfile:

gem 'k8s-deploy'

Manual

Invoke the following command from your terminal:

gem install k8s-deploy

Configuration

1. You need to put k8s-deploy.yml file into your project root.
2. Add require 'k8s-deploy/tasks' to your Rakefile.
3. Check available tasks with rake -T command.

Example of k8s-deploy.yml

production: # environment name
  git_branch: master
  dockerfile: ./Dockerfile
  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

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 environment:

rake k8s:<environment>:configuration

Show status of running Deployment & Pods:

rake k8s:<environment>:status

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

rake k8s:<environment>:check

Build new Docker image, push to registry, patch Deployment:

rake k8s:<environment>:deploy

Rollback Deployment to previous state.

rake k8s:<environment>:rollback

Scale Deployment to desired number of replicas.

rake k8s:<environment>:scale[1]

License

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