basic k8s client

.gitignore

@@ -1 +1,2 @@
-.idea
+.idea
+out

Dockerfile

@@ -0,0 +1,4 @@
+FROM alpine:latest
+COPY out/manager /manager
+RUN chmod +x /manager
+ENTRYPOINT /manager

Makefile

@@ -0,0 +1,7 @@
+IMAGE_TAG ?= docker.educg.net/k8s/manager:dev
+
+build:
+	CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o out/manager
+
+docker: build
+	docker build --rm -t $(IMAGE_TAG) .

README.md

@@ -1 +1,20 @@
-# Kubernetes 管理系统
+# Kubernetes 管理系统
+
+
+## 获得Token
+```bash
+kubectl create serviceaccount -n default dev
+kubectl create clusterrolebinding dev -n default --clusterrole=cluster-admin --serviceaccount=default:dev
+
+kubectl apply -f - <<EOF
+apiVersion: v1
+kind: Secret
+metadata:
+  name: dev-secret
+  annotations:
+    kubernetes.io/service-account.name: dev
+type: kubernetes.io/service-account-token
+EOF
+
+kubectl get secret dev-secret -o yaml
+```

install.yaml

@@ -0,0 +1,25 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: k8s-manager-deployment
+  labels:
+    app: k8s-manager
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app: k8s-manager
+  template:
+    metadata:
+      labels:
+        app: k8s-manager
+    spec:
+      serviceAccountName: dev
+      containers:
+      - name: k8s-manager-pod
+        image: docker.educg.net/k8s/manager:dev
+        ports:
+        - containerPort: 8080
+---
+apiVersion: v1
+kind: Service

main.go

@@ -14,6 +14,7 @@ import (
 var f embed.FS
 
 func main() {
+	go m.ListPods()
 	r := gin.Default()
 
 	r.SetFuncMap(template.FuncMap{

src/k8s_client.go

@@ -2,53 +2,47 @@ package k8s_manager
 
 import (
 	"context"
+	"fmt"
 	log "github.com/sirupsen/logrus"
 	appv1 "k8s.io/api/apps/v1"
 	corev1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"time"
+
 	"k8s.io/client-go/kubernetes"
 	"k8s.io/client-go/rest"
 	"strings"
 	"sync"
-	"time"
 )
 
-var (
-	BearerToken = "eyJhbGciOiJSUzI1NiIsImtpZCI6IllVaFlLMVBVYmFBZXRydXdCUnM0M1RtNGhIOTZQTWRoY05wbUg5dldIdTAifQ.eyJpc3MiOiJrdWJlcm5ldGVzL3NlcnZpY2VhY2NvdW50Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9uYW1lc3BhY2UiOiJkZWZhdWx0Iiwia3ViZXJuZXRlcy5pby9zZXJ2aWNlYWNjb3VudC9zZWNyZXQubmFtZSI6ImRldi10b2tlbi1yMmZkcSIsImt1YmVybmV0ZXMuaW8vc2VydmljZWFjY291bnQvc2VydmljZS1hY2NvdW50Lm5hbWUiOiJkZXYiLCJrdWJlcm5ldGVzLmlvL3NlcnZpY2VhY2NvdW50L3NlcnZpY2UtYWNjb3VudC51aWQiOiIyZDQ3ZDA5NS02ZmExLTQ2NmQtYjI5NS02MGU1YWRlZDQ1ODUiLCJzdWIiOiJzeXN0ZW06c2VydmljZWFjY291bnQ6ZGVmYXVsdDpkZXYifQ.MxixZYYcsVqxjy30o9romQK0nt5qn-rcXnnbz383KDCdsiaDgSszQoARDiS3QdH7iAC5-g81s6QujJdJ882Bh03JTtPUtNVmphFWyJgOCgUUb3S_r9M_t0du8DzIkVPZ-IEM1PoOMuaOmB5zpZAgnihIlZ5souDefAKc0Vni5Yvpn8_joGKzcidG-1ObjRCaxEondcFpYPyB2Aigs2ITTqggdYIJNQaAWc7pkyHtSkJUH8s4w244_ksb-QG-ULI-rKNAdy4dvbecyP3wyRefICv3MWYnKFkXn3EAWvvyt33w-ur8VAoL78L0HlEXr-j0Qw9WOrjM8ObiJCIir2zGsA"
+func ListPods() {
+	var err error
+	config, err := rest.InClusterConfig()
+	if err != nil {
+		log.WithError(err).Error("InClusterConfig")
+		return
+	}
 
-	CAPEMString = `-----BEGIN CERTIFICATE-----
-MIIC5zCCAc+gAwIBAgIBATANBgkqhkiG9w0BAQsFADAVMRMwEQYDVQQDEwptaW5p
-a3ViZUNBMB4XDTIwMDgxNDA5MDEzMFoXDTMwMDgxMzA5MDEzMFowFTETMBEGA1UE
-AxMKbWluaWt1YmVDQTCCASIwDQYJKoZIhvcNAQEBBQADggEPADCCAQoCggEBAKxS
-S5ascXta6AUnQ7ZROEKrqhaihSVbRuIOfW8H/DUjMigeeRaR6T4DYvypQS8E2LGk
-tz7330dWW0i+mqhBSJiiOpUgTD4mgIsiFYqI5gqb0swHnkQvfV3c+J3YY/zRQkIo
-D9qxs5xVdk0dX/A7sBPBNe4VUlSN3IwZSuLj0bke9/RiNYR3lhGMnpwFyTUnwTh8
-qF6MkHGByezIQiDMB7KGFAjQ+FTE43oxQljxWPh+RggKr7JaSSzjYwcYWi8myou6
-5GdqhiZWm1k5yuFlW0j8r/N322eZzzIPHm7IvLPQEmHHX8cwRU+vpDz1SRJCC+Jl
-mSC5ZJNAHf4kBkGP0FECAwEAAaNCMEAwDgYDVR0PAQH/BAQDAgKkMB0GA1UdJQQW
-MBQGCCsGAQUFBwMCBggrBgEFBQcDATAPBgNVHRMBAf8EBTADAQH/MA0GCSqGSIb3
-DQEBCwUAA4IBAQATtMQJm0dnp6fzsy1XjBk/cERcHLKX1U20lUDdrWpE2Yxi5/aX
-4i3F5CyL4hipKRKIaNJB9+RcCC+YowCbU6OybMsZQTml2e95XBIm15gckGBOMyyL
-RsTImQrIjOV9tXIl3HUmAX3BSAEEdofv/9qfD4MmSmL++H2HvEB7xHjFzCKWaY/v
-oPOWixQPOpL2YvsbwWQXVZxlZOekvDrJEQpJICGXto2B+bQ42SEGiJc3bzOMYPkD
-cMR4w7ycdyRnIsUjGxsGcconEY/qtcWa8hlgPFls460HFI7Rw9DH6/LWGtHeHbtj
-EsvUv758JsqECbzdwaHKY4CCxjPDtN6DTOtU
------END CERTIFICATE-----`
-)
+	client, err := kubernetes.NewForConfig(config)
+	if err != nil {
+		log.WithError(err).Error("NewForConfig")
+	}
+	for {
+		pods, err := client.CoreV1().Pods("").List(context.Background(), metav1.ListOptions{})
+		if err != nil {
+			fmt.Println(err)
+		} else {
+			fmt.Printf("There are %d pods in the cluster\n", len(pods.Items))
+		}
+		time.Sleep(10 * time.Second)
+	}
+}
 
-func main() {
+func fake_main() {
 	wg := sync.WaitGroup{}
+	config, err := rest.InClusterConfig()
 
-	tlsClientConfig := rest.TLSClientConfig{
-		CAData: []byte(CAPEMString),
-	}
-	config := rest.Config{
-		Host:            "minikube.local:8443",
-		BearerToken:     BearerToken,
-		TLSClientConfig: tlsClientConfig,
-		Timeout:         20 * time.Second,
-	}
-	clientSet, err := kubernetes.NewForConfig(&config)
+	clientSet, err := kubernetes.NewForConfig(config)
 	if err != nil {
 		log.Println(err)
 		return