Merge pull request #540 from aateem/enable-network-policy

Add possibility to enable network policy via Calico network controller

roles/kubernetes-apps/ansible/tasks/calico-policy-controller.yml

+- name: Write calico-policy-controller yaml
+  template: src=calico-policy-controller.yml.j2 dest=/etc/kubernetes/calico-policy-controller.yml
+  when: inventory_hostname == groups['kube-master'][0]
+
+
+- name: Start of Calico policy controller
+  kube:
+    kubectl: "{{bin_dir}}/kubectl"
+    filename: /etc/kubernetes/calico-policy-controller.yml
+  when: inventory_hostname == groups['kube-master'][0]

roles/kubernetes-apps/ansible/tasks/main.yaml

@@ -17,3 +17,7 @@
     state: "{{item.changed | ternary('latest','present') }}"
   with_items: "{{ manifests.results }}"
   when: inventory_hostname == groups['kube-master'][0]
+
+
+- include: tasks/calico-policy-controller.yml
+  when: enable_network_policy is defined and enable_network_policy == True

roles/kubernetes-apps/ansible/templates/calico-policy-controller.yml.j2

+apiVersion: extensions/v1beta1
+kind: ReplicaSet
+metadata:
+  name: calico-policy-controller
+  namespace: kube-system
+  labels:
+    k8s-app: calico-policy
+    kubernetes.io/cluster-service: "true"
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      kubernetes.io/cluster-service: "true"
+      k8s-app: calico-policy
+  template:
+    metadata:
+      name: calico-policy-controller
+      namespace: kube-system
+      labels:
+        kubernetes.io/cluster-service: "true"
+        k8s-app: calico-policy
+    spec:
+      hostNetwork: true
+      containers:
+        - name: calico-policy-controller
+          image: calico/kube-policy-controller:latest
+          env:
+            - name: ETCD_ENDPOINTS
+              value: "{{ etcd_endpoint }}"
+            # Location of the Kubernetes API - this shouldn't need to be
+            # changed so long as it is used in conjunction with
+            # CONFIGURE_ETC_HOSTS="true".
+            - name: K8S_API
+              value: "https://kubernetes.default:443"
+            # Configure /etc/hosts within the container to resolve
+            # the kubernetes.default Service to the correct clusterIP
+            # using the environment provided by the kubelet.
+            # This removes the need for KubeDNS to resolve the Service.
+            - name: CONFIGURE_ETC_HOSTS
+              value: "true"

roles/kubernetes/master/templates/manifests/kube-apiserver.manifest.j2

@@ -30,6 +30,9 @@ spec:
 {%   for conf in kube_api_runtime_config %}
     - --runtime-config={{ conf }}
 {%   endfor %}
+{% endif %}
+{% if enable_network_policy is defined and enable_network_policy == True %}
+    - --runtime-config=extensions/v1beta1/networkpolicies=true
 {% endif %}
     - --v={{ kube_log_level | default('2') }}
     - --allow-privileged=true

roles/kubernetes/node/templates/cni-calico.conf.j2

@@ -5,6 +5,11 @@
   "ipam": {
     "type": "calico-ipam"
   },
+{% if enable_network_policy is defined and enable_network_policy == True %}
+  "policy": {
+    "type": "k8s"
+  },
+{% endif %}
   "kubernetes": {
     "kubeconfig": "{{ kube_config_dir }}/node-kubeconfig.yaml"
   }