client-go

We expect to provide a go client:

• Flexibility. It can support all Kubernetes-based systems with minimized extra development, such as Openshift, istio, etc.
• Usability. Developers just need to learn to write json/yaml(kubernetes native style) from Kubernetes documentation.
• Integration. It can work with the other Kubernetes clients, such as official.

This project is based on the following softwares.

NAME	Website	LICENSE
gjson	https://github.com/tidwall/gjson	MIT
match	https://github.com/tidwall/match	MIT
pretty	https://github.com/tidwall/pretty	MIT

Comparison

	official	cdk8s	this project
Compatibility	for kubernetes-native kinds	for crd kinds	for both
Support customized Kubernetes resources	a lot of development	a lot of development	zero-deployment
Works with the other SDKs	complex	complex	simple

Architecture

Installation

git clone --recursive https://github.com/kubesys/client-go

Maven users

Usage

• Usage
  • 中文文档
  • Creating a client
  • Simple example
  • Get all kinds
  • Work with other SDKs

Creating a client

There are two ways to create a client:

• By url and token:

client := new KubernetesClient(url, token);
client.Init()

Here, the token can be created and get by following commands:

1. create token

kubectl create -f https://raw.githubusercontent.com/kubesys/client-go/master/account.yaml

2. get token

kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep kubernetes-client | awk '{print $1}') | grep "token:" | awk -F":" '{print$2}' | sed 's/ //g'

• By kubeconfig:

client, err := kubesys.NewKubernetesClientWithDefaultKubeConfig()
if err == nil {
    fmt.Println("Failed to get kubeconfig.")
    return
}
client.Init()

simple-example

Assume you have a json:

{
  "apiVersion": "v1",
  "kind": "Pod",
  "metadata": {
    "name": "busybox",
    "namespace": "default",
    "labels": {
      "test": "test"
    }
  }
}

List resources:

client.ListResources("Pod")

Create a resource:

client.CreateResource(json);

Get a resource:

client.GetResource("Pod", "default", "busybox");

Delete a resource::

client.DeleteResource("Pod", "default", "busybox")

get-all-kinds

fmt.Println(client.GetKinds());

for developer

go mod init client-go
go mod tidy

RoadMap

• 2.0.x: product ready
  • 2.0.0: using jsonparser
  • 2.0.1: support kubeconfig
  • 2.0.2: support yaml
  • 2.0.3: support binding