Addon: add headlamp

Signed-off-by: Santhosh Nagaraj S <santhosh@kinvolk.io>

cmd/minikube/cmd/config/addons_list_test.go

@@ -77,7 +77,7 @@ func TestAddonsList(t *testing.T) {
 			Ambassador *interface{} `json:"ambassador"`
 		}
 
-		b := make([]byte, 557)
+		b := make([]byte, 571)
 		r, w, err := os.Pipe()
 		if err != nil {
 			t.Fatalf("failed to create pipe: %v", err)

cmd/minikube/cmd/config/enable.go

@@ -67,6 +67,29 @@ var addonsEnableCmd = &cobra.Command{
 
 	minikube{{.profileArg}} addons enable metrics-server	
 
+`, out.V{"profileArg": tipProfileArg})
+
+		}
+		if addon == "headlamp" {
+			out.Styled(style.Tip, `To access Headlamp, use the following command:
+minikube service headlamp -n headlamp
+
+`)
+			out.Styled(style.Tip, `To authenticate in Headlamp, fetch the Authentication Token using the following command:
+
+export SECRET=$(kubectl get secrets --namespace headlamp -o custom-columns=":metadata.name" | grep "headlamp-token")
+kubectl get secret $SECRET --namespace headlamp --template=\{\{.data.token\}\} | base64 --decode
+			
+`)
+
+			tipProfileArg := ""
+			if ClusterFlagValue() != constants.DefaultClusterName {
+				tipProfileArg = fmt.Sprintf(" -p %s", ClusterFlagValue())
+			}
+			out.Styled(style.Tip, `Headlamp can display more detailed information when metrics-server is installed. To install it, run:
+
+minikube{{.profileArg}} addons enable metrics-server	
+
 `, out.V{"profileArg": tipProfileArg})
 
 		}

deploy/addons/assets.go

@@ -147,4 +147,8 @@ var (
 	// InAccelAssets assets for inaccel addon
 	//go:embed inaccel/fpga-operator.yaml.tmpl
 	InAccelAssets embed.FS
+
+	// HeadlampAssets assets for headlamp addon
+	//go:embed headlamp/*.yaml headlamp/*.tmpl
+	HeadlampAssets embed.FS
 )

deploy/addons/headlamp/headlamp-clusterrolebinding.yaml

@@ -0,0 +1,18 @@
+---
+# ClusterRoleBinding
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: headlamp-admin
+  namespace: headlamp
+  labels:
+    app.kubernetes.io/name: headlamp
+    app.kubernetes.io/instance: headlamp
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: cluster-admin
+subjects:
+- kind: ServiceAccount
+  name: headlamp
+  namespace: headlamp

deploy/addons/headlamp/headlamp-deployment.yaml.tmpl

@@ -0,0 +1,49 @@
+---
+# Deployment
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: headlamp
+  namespace: headlamp
+  labels:
+    app.kubernetes.io/name: headlamp
+    app.kubernetes.io/instance: headlamp
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      app.kubernetes.io/name: headlamp
+      app.kubernetes.io/instance: headlamp
+  template:
+    metadata:
+      labels:
+        app.kubernetes.io/name: headlamp
+        app.kubernetes.io/instance: headlamp
+    spec:
+      serviceAccountName: headlamp
+      containers:
+        - name: headlamp
+          image: {{.CustomRegistries.Headlamp  | default .ImageRepository | default .Registries.Headlamp }}{{.Images.Headlamp}}
+          imagePullPolicy: IfNotPresent
+          args:
+            - "-in-cluster"
+            - "-plugins-dir=/headlamp/plugins"
+          ports:
+            - name: http
+              containerPort: 4466
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          volumeMounts:
+            - mountPath: /headlamp/plugins
+              name: plugins
+      volumes:
+        - name: plugins
+          persistentVolumeClaim:
+            claimName: headlamp

deploy/addons/headlamp/headlamp-namespace.yaml

@@ -0,0 +1,6 @@
+---
+# Namespace
+apiVersion: v1 
+kind: Namespace 
+metadata:
+  name: headlamp

deploy/addons/headlamp/headlamp-pvc.yaml

@@ -0,0 +1,16 @@
+---
+# PersistentVolumeClaim
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: headlamp
+  namespace: headlamp
+  labels:
+    app.kubernetes.io/name: headlamp
+    app.kubernetes.io/instance: headlamp
+spec:
+  accessModes:
+    - ReadWriteOnce
+  resources:
+    requests:
+      storage: 10Gi

deploy/addons/headlamp/headlamp-service.yaml

@@ -0,0 +1,21 @@
+--- 
+# Service 
+apiVersion: v1
+kind: Service
+metadata:
+  name: headlamp
+  namespace: headlamp
+  labels:
+    app.kubernetes.io/name: headlamp
+    app.kubernetes.io/instance: headlamp
+    kubernetes.io/minikube-addons-endpoint: headlamp
+spec:
+  type: NodePort
+  ports:
+    - port: 80
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    app.kubernetes.io/name: headlamp
+    app.kubernetes.io/instance: headlamp

deploy/addons/headlamp/headlamp-serviceaccount.yaml

@@ -0,0 +1,10 @@
+---
+# ServiceAccount
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: headlamp
+  namespace: headlamp
+  labels:
+    app.kubernetes.io/name: headlamp
+    app.kubernetes.io/instance: headlamp

pkg/addons/config.go

@@ -202,4 +202,9 @@ var Addons = []*Addon{
 		set:       SetBool,
 		callbacks: []setFn{EnableOrDisableAddon},
 	},
+	{
+		name:      "headlamp",
+		set:       SetBool,
+		callbacks: []setFn{EnableOrDisableAddon},
+	},
 }

pkg/minikube/assets/addons.go

@@ -701,6 +701,20 @@ var Addons = map[string]*Addon{
 	}, map[string]string{
 		"Helm3": "docker.io",
 	}),
+	"headlamp": NewAddon([]*BinAsset{
+		MustBinAsset(addons.HeadlampAssets, "headlamp/headlamp-namespace.yaml", vmpath.GuestAddonsDir, "headlamp-namespace.yaml", "6040"),
+		MustBinAsset(addons.HeadlampAssets, "headlamp/headlamp-service.yaml", vmpath.GuestAddonsDir, "headlamp-service.yaml", "6040"),
+		MustBinAsset(addons.HeadlampAssets, "headlamp/headlamp-pvc.yaml", vmpath.GuestAddonsDir, "headlamp-pvc.yaml", "6040"),
+		MustBinAsset(addons.HeadlampAssets, "headlamp/headlamp-deployment.yaml.tmpl", vmpath.GuestAddonsDir, "headlamp-deployment.yaml", "6040"),
+		MustBinAsset(addons.HeadlampAssets, "headlamp/headlamp-serviceaccount.yaml", vmpath.GuestAddonsDir, "headlamp-serviceaccount.yaml", "6040"),
+		MustBinAsset(addons.HeadlampAssets, "headlamp/headlamp-clusterrolebinding.yaml", vmpath.GuestAddonsDir, "headlamp-clusterrolebinding.yaml", "6040"),
+	}, false, "headlamp", "kinvolk.io", "https://minikube.sigs.k8s.io/docs/handbook/addons/headlamp/",
+		map[string]string{
+			"Headlamp": "kinvolk/headlamp:v0.9.0@sha256:465aaee6518f3fdd032965eccd6a8f49e924d144b1c86115bad613872672ec02",
+		},
+		map[string]string{
+			"Headlamp": "ghcr.io",
+		}),
 }
 
 // parseMapString creates a map based on `str` which is encoded as <key1>=<value1>,<key2>=<value2>,...

site/content/en/docs/handbook/addons/headlamp.md

@@ -0,0 +1,51 @@
+---
+title: "Using Headlamp Addon"
+linkTitle: "Headlamp"
+weight: 1
+date: 2022-06-08
+---
+
+## Headlamp Addon
+
+[Headlamp](https://kinvolk.github.io/headlamp) is an easy-to-use and extensible Kubernetes web UI.
+
+### Enable Headlamp on minikube
+
+To enable this addon, simply run:
+```shell script
+minikube addons enable headlamp
+```
+
+Once the addon is enabled, you can access the Headlamp's web UI using the following command.
+```shell script
+minikube service headlamp -n headlamp
+```
+
+To authenticate in Headlamp, fetch the Authentication Token using the following command:
+
+```shell script
+export SECRET=$(kubectl get secrets --namespace headlamp -o custom-columns=":metadata.name" | grep "headlamp-token")
+kubectl get secret $SECRET --namespace headlamp --template=\{\{.data.token\}\} | base64 --decode
+``` 
+
+Headlamp can display more detailed information when metrics-server is installed. To install it, run:
+
+```shell script
+minikube addons enable metrics-server	
+```		
+
+### Testing installation
+
+```shell script
+kubectl get pods -n headlamp
+```
+
+If everything went well, there should be no errors about Headlamp's installation in your Minikube cluster.
+
+### Disable headlamp
+
+To disable this addon, simply run:
+
+```shell script
+minikube addons disable headlamp
+```