docker & kubernetes client example golang

deploy_docker.go

package cmd

import (
	"bitbucket.org/cescoferraro/api/util"
	"github.com/fatih/color"
	"github.com/spf13/cobra"
)

var (
	logger = util.Block{
		Title: "DOCKER",
		Color: color.FgRed}.Now()
)

// dockerCmd represents the docker command
var dockerCmd = &cobra.Command{
	Use:   "docker",
	Short: "A brief description",
	Long:  `A longer description`,
	Run: func(cmd *cobra.Command, args []string) {

		imageName := "cescoferraro/bruninha"
		tagVersion := "0.1.2"

		logger.Print("Creating Docker Client...")
		client := util.DockerClient()
		logger.Print("Building Docker Image...")
		client.Build(imageName)
		logger.Print("Inpecting Docker Image...")
		client.Inspect(imageName)
		logger.Print("Tagging Docker Image...")
		client.Tag(imageName, tagVersion)
		logger.Print("Pushing Docker Image...")
		client.Push(imageName, tagVersion)
	},
}

func init() {
	RootCmd.AddCommand(dockerCmd)
}

deploy_kubectl.go

package cmd

import (
	"fmt"
	"log"
	"os"

	"k8s.io/client-go/1.4/kubernetes"
	"k8s.io/client-go/1.4/pkg/api"
	"k8s.io/client-go/1.4/pkg/apis/extensions/v1beta1"
	"k8s.io/client-go/1.4/tools/clientcmd"

	"github.com/spf13/cobra"
)

// kubectlCmd represents the kubectl command
var kubectlCmd = &cobra.Command{
	Use:   "kubectl",
	Short: "A brief description of your command",
	Long: `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:

Cobra is a CLI library for Go that empowers applications.
This application is a tool to generate the needed files
to quickly create a Cobra application.`,
	Run: func(cmd *cobra.Command, args []string) {
		// TODO: Work your own magic here
		fmt.Println("kubectl called")

		kubeconfig := os.Getenv("HOME") + "/.kube/config"

		// uses the current context in kubeconfig
		config, err := clientcmd.BuildConfigFromFlags("", kubeconfig)
		if err != nil {
			panic(err.Error())
		}

		// creates the clientset
		clientset, err := kubernetes.NewForConfig(config)
		if err != nil {
			panic(err.Error())
		}

		// List all pod on iot namespace
		pods, err := clientset.Core().Pods("iot").List(api.ListOptions{})
		if err != nil {
			panic(err.Error())
		}

		// Delete all pods in iot namespace
		for _, pod := range pods.Items {
			fmt.Println(pod.ObjectMeta.Name)
			err = clientset.Core().Pods("iot").Delete(pod.ObjectMeta.Name, &api.DeleteOptions{})
			if err != nil {
				panic(err.Error())
			}
		}


		
		deploySpec := v1beta1.Deployment{}
		deploy, err := clientset.Extensions().Deployments("iot").Create(&deploySpec)
		if err != nil {
			panic(err.Error())
		}
		log.Println(deploy)

	},
}

func init() {
	RootCmd.AddCommand(kubectlCmd)

	// Here you will define your flags and configuration settings.

	// Cobra supports Persistent Flags which will work for this command
	// and all subcommands, e.g.:
	// kubectlCmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command
	// is called directly, e.g.:
	// kubectlCmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")

}

deploy_prints.go

package util

import (
	"log"
	"net/http"
	"time"

	"github.com/fatih/color"

	"sort"

	"encoding/json"

	"github.com/spf13/viper"
)

var UtilLogsColor = color.FgHiYellow
var UtilLogsBlock = "UTIL"

type Block struct {
	Title string
	Color color.Attribute
	Time  time.Time
}

func (block Block) Now() Block {
	block.Time = time.Now()
	return block
}

func (block Block) Print(message string) {
	if viper.GetBool("verbose") {
		red := color.New(block.Color).SprintFunc()
		msg := "[" + red(block.Title) + "] " + message
		empty := time.Time{}
		if block.Time != empty {
			msg = msg + " " + red("+") + red(time.Since(block.Time))
		}
		log.Println(msg)
	}
}

var PackageBlocks = map[string]Block{
	"redis": Block{Title: "REDIS", Color: color.FgWhite},
}

func LogIfVerbose(cor color.Attribute, block, logg string) {
	if viper.GetBool("verbose") {
		red := color.New(cor).SprintFunc()
		log.Printf("[%s] "+logg, red(block))
	}
}

func RunIfVerbose(logg func()) {
	if viper.GetBool("verbose") {
		logg()
	}
}

var Ciano = color.New(color.FgCyan).Add(color.Underline)

func PanicIf(err error) {
	if err != nil {
		panic(err)
	}
}

func LogIfError(err error) {
	if err != nil {
		log.Println(err)
	}
}

func PrintRequestHeaders(r *http.Request) {
	for k, v := range r.Header {
		log.Println("key:", k, "value:", v)
	}
}

func PrintViperConfig() {
	// TODO: HANDLE NESTED YAMLS BETTER
	keys := viper.AllKeys()
	sort.Strings(keys)
	for _, key := range keys {

		if key == "publickey" || key == "privatekey" {
			LogIfVerbose(color.FgBlue, "VIPER", " "+key+": ******")
		} else {
			LogIfVerbose(color.FgBlue, "VIPER", " "+key+": "+viper.GetString(key))
		}

	}
	return
}

func Marshall(hey interface{}) string {
	ola, err := json.Marshal(hey)
	if err != nil {
		return "Marsheling failed!"
	}
	return string(ola)
}

deploy_update.sh

#!/usr/bin/env bash
make push


docker push cescoferraro/api:v0.0.1
kubectl --namespace=api delete pods -l name=api
sleep 6
kubectl --namespace=api logs $(kubectl --namespace=api get pods | awk 'FNR == 2 {print $1}')

deploy_util-docker.go

package util

import (
	"bytes"
	"log"
	"os"
	"strings"

	docker "github.com/fsouza/go-dockerclient"
)

// Dockeroo embbeds a fsouza/go-dockerclient
type Dockeroo struct{ *docker.Client }

// DockerClient - Create Docker client
func DockerClient() Dockeroo {
	client, _ := docker.NewClientFromEnv()
	return Dockeroo{client}
}

// Build - Build Docker image
func (client *Dockeroo) Build(imageName string) {
	var buf bytes.Buffer
	here, err := os.Getwd()
	opts := docker.BuildImageOptions{
		Name:         imageName,
		ContextDir:   here,
		OutputStream: &buf,
	}
	err = client.BuildImage(opts)
	if err != nil {
		log.Println(err.Error())
	}
	// m := strings.Split(buf.String(), "\n")
	for _, m := range strings.Split(buf.String(), "\n") {
		log.Printf("metric: %s", m)
	}
}

// Tag - Tag Docker image
func (client *Dockeroo) Tag(imageName, tagVersion string) {
	tags := docker.TagImageOptions{
		Repo: imageName,
		Tag:  tagVersion,
	}
	err := client.TagImage(imageName, tags)
	if err != nil {
		log.Println(err.Error())
	}
}

// Inspect - Tag Docker image
func (client *Dockeroo) Inspect(imageName string) {
	image, err := client.InspectImage(imageName)
	if err != nil {
		log.Println(err.Error())
	}
	log.Println(image.RepoTags)
}

// Push - Push Docker image
func (client *Dockeroo) Push(imageName, tagVersion string) {
	pushOpts := docker.PushImageOptions{
		Name:         imageName,
		Tag:          tagVersion,
		OutputStream: os.Stdout,
	}
	authOpts := docker.AuthConfiguration{
		Username:      "cescoferraro",
		Password:      "password",
		Email:         "[email protected]",
		ServerAddress: "registry.hub.docker.io",
	}
	err := client.PushImage(pushOpts, authOpts)
	if err != nil {
		log.Println(err.Error())
	}
}