Add kubernetes dashboard

Either run kubectl proxy, but you must setup routes or kubectl on some
node (only infra has kubectl by default). Another option is connecting
onto the node where the dashboard is exposed via NodePort. Instructions
are here:
https://github.com/kubernetes/dashboard/wiki/Accessing-dashboard
(1.7.X and above)

Change-Id: I5a28f458c0ae949278b1e6eaf6eb063d09f93fc0
Issue-ID: OOM-1778
Signed-off-by: Petr Ospalý <p.ospaly@partner.samsung.com>
Signed-off-by: Michal Zegan <m.zegan@samsung.com>

5 files changed, 212 insertions, 1 deletions

diff --git a/ansible/roles/rke/defaults/main.yml b/ansible/roles/rke/defaults/main.yml
index cbf03b74..88216857 100644
--- a/ansible/roles/rke/defaults/main.yml
+++ b/ansible/roles/rke/defaults/main.yml
@@ -4,6 +4,8 @@ rke_username: rke
 rke_bin_dir: /usr/local/bin
 kube_config_dir: "{{ ansible_env.HOME }}/.kube"
 cluster_config_dir: "{{ app_data_path }}/cluster"
+# Whether dashboard is exposed.
+rke_dashboard_exposed: true
 rke:
   # rke (rancher) images
   etcd: rancher/coreos-etcd:v3.2.24-rancher1
diff --git a/ansible/roles/rke/tasks/rke_config.yml b/ansible/roles/rke/tasks/rke_config.yml
index 49503192..4112e107 100644
--- a/ansible/roles/rke/tasks/rke_config.yml
+++ b/ansible/roles/rke/tasks/rke_config.yml
@@ -38,6 +38,16 @@
     src: cluster.yml.j2
     dest: "{{ cluster_config_dir }}/cluster.yml"
 
+- name: Prepare rke addon manifest (dashboard)
+  template:
+    src: kubernetes-dashboard.yaml.j2
+    dest: "{{ cluster_config_dir }}/kubernetes-dashboard.yml"
+
+- name: Prepare rke addon manifest (dashboard user)
+  template:
+    src: k8s-dashboard-user.yml.j2
+    dest: "{{ cluster_config_dir }}/k8s-dashboard-user.yml"
+
 - name: Install rke cli tool
   copy:
     src: "{{ app_data_path }}/downloads/{{ rke_binary }}"
diff --git a/ansible/roles/rke/templates/cluster.yml.j2 b/ansible/roles/rke/templates/cluster.yml.j2
index d55a486c..64508e6f 100644
--- a/ansible/roles/rke/templates/cluster.yml.j2
+++ b/ansible/roles/rke/templates/cluster.yml.j2
@@ -80,7 +80,9 @@ authentication:
   sans: []
   webhook: null
 addons: ""
-addons_include: []
+addons_include:
+- "{{ cluster_config_dir }}/kubernetes-dashboard.yml"
+- "{{ cluster_config_dir }}/k8s-dashboard-user.yml"
 system_images:
   etcd: "{{ rke.etcd }}"
   alpine: "{{ rke.alpine }}"
diff --git a/ansible/roles/rke/templates/k8s-dashboard-user.yml.j2 b/ansible/roles/rke/templates/k8s-dashboard-user.yml.j2
new file mode 100644
index 00000000..9031553c
--- /dev/null
+++ b/ansible/roles/rke/templates/k8s-dashboard-user.yml.j2
@@ -0,0 +1,19 @@
+---
+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
\ No newline at end of file
diff --git a/ansible/roles/rke/templates/kubernetes-dashboard.yaml.j2 b/ansible/roles/rke/templates/kubernetes-dashboard.yaml.j2
new file mode 100644
index 00000000..4458628a
--- /dev/null
+++ b/ansible/roles/rke/templates/kubernetes-dashboard.yaml.j2
@@ -0,0 +1,178 @@
+# Copyright 2017 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# ------------------- Dashboard Secrets ------------------- #
+
+apiVersion: v1
+kind: Secret
+metadata:
+  labels:
+    k8s-app: kubernetes-dashboard
+  name: kubernetes-dashboard-certs
+  namespace: kube-system
+type: Opaque
+
+---
+
+apiVersion: v1
+kind: Secret
+metadata:
+  labels:
+    k8s-app: kubernetes-dashboard
+  name: kubernetes-dashboard-csrf
+  namespace: kube-system
+type: Opaque
+data:
+  csrf: ""
+
+---
+# ------------------- Dashboard Service Account ------------------- #
+
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  labels:
+    k8s-app: kubernetes-dashboard
+  name: kubernetes-dashboard
+  namespace: kube-system
+
+---
+# ------------------- Dashboard Role & Role Binding ------------------- #
+
+kind: Role
+apiVersion: rbac.authorization.k8s.io/v1
+metadata:
+  name: kubernetes-dashboard-minimal
+  namespace: kube-system
+rules:
+  # Allow Dashboard to create 'kubernetes-dashboard-key-holder' secret.
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["create"]
+  # Allow Dashboard to create 'kubernetes-dashboard-settings' config map.
+- apiGroups: [""]
+  resources: ["configmaps"]
+  verbs: ["create"]
+  # Allow Dashboard to get, update and delete Dashboard exclusive secrets.
+- apiGroups: [""]
+  resources: ["secrets"]
+  resourceNames: ["kubernetes-dashboard-key-holder", "kubernetes-dashboard-certs", "kubernetes-dashboard-csrf"]
+  verbs: ["get", "update", "delete"]
+  # Allow Dashboard to get and update 'kubernetes-dashboard-settings' config map.
+- apiGroups: [""]
+  resources: ["configmaps"]
+  resourceNames: ["kubernetes-dashboard-settings"]
+  verbs: ["get", "update"]
+  # Allow Dashboard to get metrics from heapster.
+- apiGroups: [""]
+  resources: ["services"]
+  resourceNames: ["heapster"]
+  verbs: ["proxy"]
+- apiGroups: [""]
+  resources: ["services/proxy"]
+  resourceNames: ["heapster", "http:heapster:", "https:heapster:"]
+  verbs: ["get"]
+
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: kubernetes-dashboard-minimal
+  namespace: kube-system
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: kubernetes-dashboard-minimal
+subjects:
+- kind: ServiceAccount
+  name: kubernetes-dashboard
+  namespace: kube-system
+
+---
+# ------------------- Dashboard Deployment ------------------- #
+
+kind: Deployment
+apiVersion: apps/v1
+metadata:
+  labels:
+    k8s-app: kubernetes-dashboard
+  name: kubernetes-dashboard
+  namespace: kube-system
+spec:
+  replicas: 1
+  revisionHistoryLimit: 10
+  selector:
+    matchLabels:
+      k8s-app: kubernetes-dashboard
+  template:
+    metadata:
+      labels:
+        k8s-app: kubernetes-dashboard
+    spec:
+      containers:
+      - name: kubernetes-dashboard
+        image: k8s.gcr.io/kubernetes-dashboard-amd64:v1.10.1
+        ports:
+        - containerPort: 8443
+          protocol: TCP
+        args:
+          - --auto-generate-certificates
+          # Uncomment the following line to manually specify Kubernetes API server Host
+          # If not specified, Dashboard will attempt to auto discover the API server and connect
+          # to it. Uncomment only if the default does not work.
+          # - --apiserver-host=http://my-address:port
+        volumeMounts:
+        - name: kubernetes-dashboard-certs
+          mountPath: /certs
+          # Create on-disk volume to store exec logs
+        - mountPath: /tmp
+          name: tmp-volume
+        livenessProbe:
+          httpGet:
+            scheme: HTTPS
+            path: /
+            port: 8443
+          initialDelaySeconds: 30
+          timeoutSeconds: 30
+      volumes:
+      - name: kubernetes-dashboard-certs
+        secret:
+          secretName: kubernetes-dashboard-certs
+      - name: tmp-volume
+        emptyDir: {}
+      serviceAccountName: kubernetes-dashboard
+      # Comment the following tolerations if Dashboard must not be deployed on master
+      tolerations:
+      - key: node-role.kubernetes.io/master
+        effect: NoSchedule
+
+---
+# ------------------- Dashboard Service ------------------- #
+
+kind: Service
+apiVersion: v1
+metadata:
+  labels:
+    k8s-app: kubernetes-dashboard
+  name: kubernetes-dashboard
+  namespace: kube-system
+spec:
+  ports:
+    - port: 443
+      targetPort: 8443
+  selector:
+    k8s-app: kubernetes-dashboard
+{% if rke_dashboard_exposed %}
+  type: NodePort
+{% endif %}