Merge pull request #250 from cornelk/master

Add Kubernetes Dashboard addon

pkg/addons/addon_dashboard.go

@@ -0,0 +1,92 @@
+package addons
+
+import (
+	"fmt"
+
+	"github.com/xetys/hetzner-kube/pkg/clustermanager"
+)
+
+// DashboardAddon installs dashboard
+type DashboardAddon struct {
+	masterNode   *clustermanager.Node
+	communicator clustermanager.NodeCommunicator
+}
+
+// NewDashboardAddon installs dashboard to the cluster
+func NewDashboardAddon(provider clustermanager.ClusterProvider, communicator clustermanager.NodeCommunicator) ClusterAddon {
+	masterNode, _ := provider.GetMasterNode()
+	return DashboardAddon{masterNode: masterNode, communicator: communicator}
+}
+
+func init() {
+	addAddon(NewDashboardAddon)
+}
+
+// Name returns the addons name
+func (addon DashboardAddon) Name() string {
+	return "dashboard"
+}
+
+// Requires returns a slice with the name of required addons
+func (addon DashboardAddon) Requires() []string {
+	return []string{}
+}
+
+// Description returns the addons description
+func (addon DashboardAddon) Description() string {
+	return "Kubernetes Dashboard"
+}
+
+// URL returns the URL of the addons underlying project
+func (addon DashboardAddon) URL() string {
+	return "https://github.com/kubernetes/dashboard"
+}
+
+// Install performs all steps to install the addon
+func (addon DashboardAddon) Install(args ...string) {
+	node := *addon.masterNode
+	_, err := addon.communicator.RunCmd(node, "kubectl apply -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml")
+	FatalOnError(err)
+
+	serviceAccount := `apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: admin-user
+  namespace: kube-system
+---
+apiVersion: rbac.authorization.k8s.io/v1beta1
+kind: ClusterRoleBinding
+metadata:
+  name: admin-user
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: cluster-admin
+subjects:
+  - kind: ServiceAccount
+    name: admin-user
+    namespace: kube-system`
+	err = addon.communicator.WriteFile(node, "/root/dashboard-service-account.yaml", serviceAccount, false)
+	FatalOnError(err)
+
+	_, err = addon.communicator.RunCmd(node, "kubectl apply -f dashboard-service-account.yaml")
+	FatalOnError(err)
+
+	token, err := addon.communicator.RunCmd(node, "kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}') | grep -E '^token' | cut -f2 -d':' | tr -d ' \t'")
+	FatalOnError(err)
+
+	fmt.Printf("Use the following token to login to the dashboard: %s\n", token)
+	fmt.Println("Dashboard installed")
+}
+
+// Uninstall performs all steps to remove the addon
+func (addon DashboardAddon) Uninstall() {
+	node := *addon.masterNode
+	_, err := addon.communicator.RunCmd(node, "kubectl delete -f https://raw.githubusercontent.com/kubernetes/dashboard/v1.10.1/src/deploy/recommended/kubernetes-dashboard.yaml")
+	FatalOnError(err)
+
+	_, err = addon.communicator.RunCmd(node, "kubectl delete -f dashboard-service-account.yaml")
+	FatalOnError(err)
+
+	fmt.Println("Dashboard uninstalled")
+}

pkg/addons/util.go

@@ -2,7 +2,7 @@ package addons
 
 import "log"
 
-// FatalOnError is an helper function used to transfor error to fatal
+// FatalOnError is an helper function used to transfer error to fatal
 func FatalOnError(err error) {
 	if err != nil {
 		log.Fatal(err)