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main.go
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main.go
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package main
import (
"context"
"fmt"
"log"
"net/http"
"os"
"path/filepath"
"strings"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"github.com/julienschmidt/httprouter"
"html/template"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
type Image struct {
Namespaces string
Deployments []string
URLs []string
Tags string
}
var (
// Kubeconfig = flag.String("kubeconfig", os.Getenv("HOME")+"/.kube/config", "Kubernetes config file.")
NS = os.Getenv("NAMESPACES")
LB1 = os.Getenv("LABEL1")
LB2 = os.Getenv("LABEL2")
Namespaces = strings.Split(NS, ",")
)
func ConnectKube() (clientset *kubernetes.Clientset) {
config, err := rest.InClusterConfig()
if err != nil {
panic(err.Error())
}
clientset, err = kubernetes.NewForConfig(config)
if err != nil {
panic(err.Error())
}
return
}
func GetAllImages() (images []Image, err error) {
images = []Image{}
deploymentList := []string{}
ingressList := []string{}
fmt.Println(Namespaces)
clientset := ConnectKube()
for n, ns := range Namespaces {
fmt.Println(n, " - ", ns)
labelProject := ""
ingressLabel := ""
deployment, err := clientset.AppsV1().Deployments(ns).List(context.TODO(), metav1.ListOptions{})
if err != nil {
panic(err.Error())
}
ingress, err := clientset.ExtensionsV1beta1().Ingresses(ns).List(context.TODO(), metav1.ListOptions{})
if err != nil {
panic(err.Error())
}
for _, d := range deployment.Items {
if !(strings.Contains(d.Labels["project"], LB1)) && !(strings.Contains(d.Labels["project"], LB2)) {
break
}
if labelProject == "" {
labelProject = d.Labels["project"]
}
if labelProject != d.Labels["project"] {
xz := Image{ns, deploymentList, ingressList, labelProject}
images = append(images, xz)
deploymentList = nil
ingressList = nil
labelProject = d.Labels["project"]
deploymentList = append(deploymentList, d.Name)
} else {
deploymentList = append(deploymentList, d.Name)
}
if ingressLabel != labelProject {
ingressLabel = labelProject
for _, i := range ingress.Items {
if i.Labels["project"] == d.Labels["project"] {
for host := range i.Spec.Rules {
ingressList = append(ingressList, i.Spec.Rules[host].Host)
}
}
}
}
}
xz := Image{ns, deploymentList, ingressList, labelProject}
images = append(images, xz)
deploymentList = nil
ingressList = nil
}
return
}
func GetImages(rw http.ResponseWriter, r *http.Request, p httprouter.Params) {
images, err := GetAllImages()
if err != nil {
http.Error(rw, err.Error(), 400)
return
}
main := filepath.Join("public", "html", "imagesDynamicPage.html")
common := filepath.Join("public", "html", "common.html")
tmpl, err := template.ParseFiles(main, common)
if err != nil {
http.Error(rw, err.Error(), 400)
return
}
err = tmpl.ExecuteTemplate(rw, "images", images)
if err != nil {
http.Error(rw, err.Error(), 400)
return
}
}
func main() {
r := httprouter.New()
routes(r)
err := http.ListenAndServe(":80", r)
if err != nil {
log.Fatal(err)
}
}
func routes(r *httprouter.Router) {
r.ServeFiles("/public/*filepath", http.Dir("public"))
r.GET("/", GetImages)
}