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Development Guide

This document walks you through how to get started developing KubeSphere and development workflow.

Preparing the environment

Go

KubeSphere development is based on Kubernetes, both of them are written in Go. If you don't have a Go development environment, please set one up.

Kubernetes requires Go
1.13+ >= 1.12

Tips:

  • Ensure your GOPATH and PATH have been configured in accordance with the Go environment instructions.
  • It's recommended to install macOS GNU tools for Mac OS.

Docker

KubeSphere components are often deployed as containers in Kubernetes. If you need to rebuild the KubeSphere components in the Kubernetes cluster, you will need to install Docker.

Dependency management

KubeSphere uses Go Modules to manage dependencies in the vendor/ tree.

Dependencies

kubesphere/kubesphere repository contains the source code . If you're looking for its dependent components, they live in their own repositories since they can be individual and universal.

  • Alert: Alert is an enterprise-grade general-purpose high-performance alerting system.
  • Notification: Notification is an enterprise-grade general-purpose high-performance notification system, it provides email notification service for KubeSphere currently.
  • OpenPitrix: Application management platform on multi-cloud environment, it provides application template and application management for KubeSphere currently.
  • SonarQube: Integrated in KubeSphere DevOps, it provides the capability to not only show health of an application but also to highlight issues newly introduced.

Building KubeSphere on a local OS/shell environment

For Quick Taste Binary

mkdir ks-tmp
cd ks-tmp
echo 'module kubesphere' > go.mod
echo 'replace (
        github.com/Sirupsen/logrus v1.4.1 => github.com/sirupsen/logrus v1.4.1
      	github.com/kiali/kiali => github.com/kubesphere/kiali v0.15.1-0.20190407071308-6b5b818211c3
      	github.com/kubernetes-sigs/application => github.com/kubesphere/application v0.0.0-20190518133311-b9d9eb0b5cf7
      )' >> go.mod
      
GO111MODULE=on go get kubesphere.io/kubesphere@d649e3d0bbc64bfba18816c904819e4850d021e0
GO111MODULE=on go build -o ks-apiserver kubesphere.io/kubesphere/cmd/ks-apiserver # build ks-apiserver
GO111MODULE=on go build -o ks-apigateway kubesphere.io/kubesphere/cmd/ks-apigateway # build ks-apigateway
GO111MODULE=on go build -o ks-controller-manager kubesphere.io/kubesphere/cmd/controller-manager # build ks-controller-manager
GO111MODULE=on go build -o ks-iam kubesphere.io/kubesphere/cmd/ks-iam # build ks-iam

For Building KubeSphere Images

KubeSphere components are often deployed as a container in a kubernetes cluster, you may need to build a Docker image locally.

  1. Clone repo to local
git clone https://github.com/kubesphere/kubesphere.git
  1. Run Docker command to build image
# $REPO is the docker registry to push to
# $Tag is the tag name of the docker image
# The full go build process will be executed in the Dockerfile, so you may need to set GOPROXY in it.
docker build -f build/ks-apigateway/Dockerfile -t $REPO/ks-apigateway:$TAG .
docker build -f build/ks-apiserver/Dockerfile -t $REPO/ks-apiserver:$TAG .
docker build -f build/ks-iam/Dockerfile -t $REPO/ks-account:$TAG .
docker build -f build/ks-controller-manager/Dockerfile -t $REPO/ks-controller-manager:$TAG .
docker build -f ./pkg/db/Dockerfile -t $REPO/ks-devops:flyway-$TAG ./pkg/db/

Test

In the development process, it is recommended to use local Kubernetes clusters, such as minikube, or to install an single-node all-in-one environment (Kubernetes-based) for quick testing.

Tip: It also supports to use Docker for Desktop ships with Kubernetes as the test environment.

Development Workflow

ks-workflow

1 Fork in the cloud

  1. Visit https://github.com/kubesphere/kubesphere
  2. Click Fork button to establish a cloud-based fork.

2 Clone fork to local storage

Per Go's [workspace instructions][https://golang.org/doc/code.html#Workspaces], place KubeSphere' code on your GOPATH using the following cloning procedure.

  1. Define a local working directory:
$ export working_dir=$GOPATH/src/kubesphere.io
$ export user={your github profile name}
  1. Create your clone locally:
$ mkdir -p $working_dir
$ cd $working_dir
$ git clone https://github.com/$user/kubesphere.git
$ cd $working_dir/kubesphere
$ git remote add upstream https://github.com/kubesphere/kubesphere.git

# Never push to upstream master
$ git remote set-url --push upstream no_push

# Confirm that your remotes make sense:
$ git remote -v

3 Keep your branch in sync

git fetch upstream
git checkout master
git rebase upstream/master

4 Add new features or fix issues

Branch from it:

$ git checkout -b myfeature

Then edit code on the myfeature branch.

Test and build

Currently, make rules only contain simple checks such as vet, unit test, will add e2e tests soon.

Using KubeBuilder

  • For Linux OS, you can download and execute this KubeBuilder script.

  • For MacOS, you can install KubeBuilder by following this guide.

Run and test

$ make all
# Run every unit test
$ make test

Run make help for additional information on these make targets.

5 Development in new branch

Sync with upstream

After the test is completed, suggest you to keep your local in sync with upstream which can avoid conflicts.

# Rebase your the master branch of your local repo.
$ git checkout master
$ git rebase upstream/master

# Then make your development branch in sync with master branch
git checkout new_feature
git rebase -i master

Commit local changes

$ git add <file>
$ git commit -s -m "add your description"

6 Push to your folk

When ready to review (or just to establish an offsite backup or your work), push your branch to your fork on github.com:

$ git push -f ${your_remote_name} myfeature

7 Create a PR

CI/CD

KubeSphere uses Travis CI as a CI/CD tool.

The components of KubeSphere need to be compiled and build include following:

ks-apiserver, ks-controller-manager, ks-account, ks-apigateway, ks-devops

After your PR is merged，Travis CI will compile the entire project and build the image, and push the image kubespheredev/[component-name]:latest to Dockerhub (e.g. kubespheredev/ks-apiserver:latest)

API Reference

KubeSphere provides standard RESTFul API and detailed API documentations for developers, see KubeSphere API Reference for more information.

Code conventions

Please reference Code conventions and follow with the rules.

Note:

  • All new packages and most new significant functionality must come with unit tests
  • Comment your code in English, see Go's commenting conventions