Add pseudo network plugin called "cloud" to use cloud provider for network

Allow to let the cloud provider configure proper routing for nodes.

inventory/group_vars/all.yml

@@ -79,6 +79,7 @@ etcd_multiaccess: true
 loadbalancer_apiserver_localhost: true
 
 # Choose network plugin (calico, weave or flannel)
+# Can also be set to 'cloud', which lets the cloud provider setup appropriate routing
 kube_network_plugin: flannel
 
 # Kubernetes internal network for services, unused block of space.

roles/kubernetes/master/templates/manifests/kube-controller-manager.manifest.j2

@@ -27,6 +27,11 @@ spec:
     - --cloud-config={{ kube_config_dir }}/cloud_config
 {% elif cloud_provider is defined and cloud_provider == "aws" %}
     - --cloud-provider={{cloud_provider}}
+{% endif %}
+{% if kube_network_plugin is defined and kube_network_plugin == 'cloud' %}
+    - --allocate-node-cidrs=true
+    - --configure-cloud-routes=true
+    - --cluster-cidr={{ kube_pods_subnet }}
 {% endif %}
     livenessProbe:
       httpGet:

roles/kubernetes/node/templates/kubelet.j2

@@ -27,6 +27,8 @@ KUBELET_ARGS="--kubeconfig={{ kube_config_dir}}/kubelet.kubeconfig --require-kub
 KUBELET_NETWORK_PLUGIN="--network-plugin=cni --network-plugin-dir=/etc/cni/net.d"
 {% elif kube_network_plugin is defined and kube_network_plugin == "weave" %}
 DOCKER_SOCKET="--docker-endpoint=unix:/var/run/weave/weave.sock"
+{% elif kube_network_plugin is defined and kube_network_plugin == "cloud" %}
+KUBELET_NETWORK_PLUGIN="--hairpin-mode=promiscuous-bridge --network-plugin=kubenet"
 {% endif %}
 # Should this cluster be allowed to run privileged docker containers
 KUBE_ALLOW_PRIV="--allow-privileged=true"

roles/network_plugin/cloud/tasks/main.yml

+---
+
+- name: Cloud | Copy cni plugins from hyperkube
+  command: "/usr/bin/docker run --rm -v /opt/cni/bin:/cnibindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /bin/cp -r /opt/cni/bin/. /cnibindir/"
+  register: cni_task_result
+  until: cni_task_result.rc == 0
+  retries: 4
+  delay: "{{ retry_stagger | random + 3 }}"
+  changed_when: false

roles/network_plugin/meta/main.yml

@@ -12,3 +12,5 @@ dependencies:
  - role: network_plugin/canal
    when: kube_network_plugin == 'canal'
    tags: canal
+ - role: network_plugin/cloud
+   when: kube_network_plugin == 'cloud'