draft

README

Draft

A tool to help developers hit the ground running with Kubernetes.

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Getting Started

Draft is a tool made for users who are just getting started with Kubernetes, or users who want to simplify their experience with Kubernetes. This readme will give you a quick run down on Draft’s commands and what they do.

draft create

In our directory that holds our application, we can run the CLI command ‘draft create’. Draft create will walk you through a series of questions prompting you on your application specification. At the end of it, you will have a Dockerfile as well as Kubernetes manifests to deploy your application. Below is a picture of running the Draft create command on our Contoso Air repository.

generate-workflow

Next up, we can run the ‘draft generate-workflow’ command. This command will automatically build out a GitHub Action for us.

setup-gh

If you are using Azure, you can also run the ‘draft setup-gh’ command to automate the GitHub OIDC setup process. This process is needed to make sure your Azure account and your GitHub repository can talk to each other. If you plan on using the GitHub Action to deploy your application, this step must be completed.

At this point, you have all the files needed to deploy your application onto a Kubernetes cluster!

If you don’t plan on using the GitHub Action, you can directly apply your deployment files by using the kubectl apply -f command.

If you plan on deploying your application through your GitHub Action, commit all the files to your repository and watch your application get deployed!

draft validate

Draft validate scans your manifests and populates warnings messages in your code terminal if your manifests are not following best practices. All best practices are sourced from AKS’s deployment safeguards feature. To learn more about deployment safeguards, visit the offical documentation. To view the best practices that are used in Draft, view the safeguards package.

draft info

The draft info command prints information about supported languages and deployment types.

Example output (for brevity, only the first supported language is shown):

{
  "supportedLanguages": [
    {
      "name": "clojure",
      "displayName": "Clojure",
      "variableExampleValues": {
        "VERSION": [
          "8-jdk-alpine",
          "11-jdk-alpine"
        ]
      }
    }
  ]
  ...,
  "supportedDeploymentTypes": [
    "helm",
    "kustomize",
    "manifests"
  ]
}

About The Project

Draft makes it easier for developers to get started building apps that run on Kubernetes by taking a non-containerized application and generating the Dockerfiles, Kubernetes manifests, Helm charts, Kustomize configuration, and other artifacts associated with a containerized application. Draft can also generate a GitHub Actions workflow file to quickly build and deploy applications onto any Kubernetes cluster.

Commands

• draft create adds the minimum required Dockerfile and manifest files for your deployment to the project directory.
  • Supported deployment types: Helm, Kustomize, Kubernetes manifest.
• draft setup-gh automates the GitHub OIDC setup process for your project.
• draft generate-workflow generates a GitHub Actions workflow for automatic build and deploy to a Kubernetes cluster.
• draft update automatically make your application to be internet accessible.
• draft validate scan your manifests to see if they are following Kubernetes best practices.
• draft info print supported language and field information in json format.

Use draft [command] --help for more information about a command.

Dry Run

The following flags can be used for enabling dry running, which is currently supported by the following commands: create

• --dry-run enables dry run mode in which no files are written to disk
• --dry-run-file specifies a file to write the dry run summary in json format into

// Example dry run output
{
  "variables": {
    "APPNAME": "testapp",
    "BUILDERVERSION": "null",
    "IMAGENAME": "testapp",
    "LANGUAGE": "gomodule",  // Note that this variable is in addition to the draft config variables
    "NAMESPACE": "default",
    "PORT": "1323",
    "SERVICEPORT": "80",
  },
  "filesToWrite": [
    "langtest/.dockerignore",
    "langtest/Dockerfile",
    "langtest/charts/.helmignore",
    "langtest/charts/Chart.yaml",
    "langtest/charts/production.yaml",
    "langtest/charts/templates/_helpers.tpl",
    "langtest/charts/templates/deployment.yaml",
    "langtest/charts/templates/namespace.yaml",
    "langtest/charts/templates/service.yaml",
    "langtest/charts/values.yaml"
  ]
}

Prerequisites

Draft requires Go version 1.18.x. or above as it uses go generics

Check your go version.

go version

Installation

1. Clone the repo

   git clone https://github.com/Azure/draft.git
   

2. Change to the draft directory and build the binary

   cd draft/
   make
   

3. Add the binary to your path (we use the same directory as go install)

   mv draft $HOME/go/bin/
   

Install with HomeBrew

1. Run the following commands

   $ brew tap azure/draft
   $ brew install draft
   

Installation using script

curl -fsSL https://raw.githubusercontent.com/Azure/draft/main/scripts/install.sh | bash

• Windows isn't currently supported (you can use WSL)

Draft as a Dependency

If you are looking to leverage Draft's file generation capabilities and templating within another project instead of using the CLI, you have two options: importing the Draft go packages, and wrapping the binary

Importing Draft Go Packages

This option will provide the cleanest integration, as it directly builds Draft into your project. However, it requires that your project is written in Go.

Dockerfiles can be generated following the example in examples/dockerfile.go

Deployment files can be generated following the example in examples/deployment.go

Wrapping the Binary

For projects written in languages other than Go, or for projects that prefer to not import the packages directly, you can wrap the Draft binary.

Several features have been implemented to make consuming draft as easy as possible:

• draft info prints supported language and field information in json format for easy parsing
• --dry-run and --dry-run-file flags can be used on the create and update commands to generate a summary of the files that would be written to disk, and the variables that would be used in the templates
• draft update and draft create accept a repeatable --variable flag that can be used to set template variables
• draft create takes a --create-config flag that can be used to input variables through a yaml file instead of interactively

Introduction Videos

Contributing

Draft is fully compatible with Azure Kubernetes Service. We strongly encourage contributions to make Draft available to other cloud providers 😊!

Issues/Discussions

The Draft team will be monitoring both the issues and discussions board. Please feel free to create issues for any problems you run into and the Draft team will be quick to respond. The discussions board will be used for community engagement. We look forward to see you there!

License

Draft is under the MIT License. See LICENSE for more information.

Trademark Notice

Authorized use of Microsoft trademarks or logos is subject to and must follow Microsoft’s Trademark & Brand Guidelines. Use of Microsoft trademarks or logos in modified versions of this project must not cause confusion or imply Microsoft sponsorship. Any use of third-party trademarks or logos are subject to those third-party’s policies.

Documentation

Overview

Copyright © 2021 NAME HERE <EMAIL ADDRESS>

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.