Add kube-router annotations (#3533)

docs/kube-router.md

@@ -89,3 +89,20 @@ kubeadm_enabled: true
 kube_router_run_service_proxy: true
 kube_proxy_mode: ipvs
 ```
+
+## Advanced BGP Capabilities
+https://github.com/cloudnativelabs/kube-router#advanced-bgp-capabilities
+
+If you have other networking devices or SDN systems that talk BGP, kube-router will fit in perfectly.
+From a simple full node-to-node mesh to per-node peering configurations, most routing needs can be attained.
+The configuration is Kubernetes native (annotations) just like the rest of kube-router.
+
+For more details please refer to the https://github.com/cloudnativelabs/kube-router/blob/master/docs/bgp.md.
+
+Next options will set up annotations for kube-router, using `kubectl annotate` command.
+
+```
+kube_router_annotations_master: []
+kube_router_annotations_node: []
+kube_router_annotations_all: []
+```

inventory/sample/group_vars/k8s-cluster/k8s-net-kube-router.yml

@@ -35,3 +35,12 @@
 # Setups node CNI to allow hairpin mode, requires node reboots, see
 # https://github.com/cloudnativelabs/kube-router/blob/master/docs/user-guide.md#hairpin-mode
 # kube_router_support_hairpin_mode: false
+
+# Array of annotations for master
+# kube_router_annotations_master: []
+
+# Array of annotations for every node
+# kube_router_annotations_node: []
+
+# Array of common annotations for every node
+# kube_router_annotations_all: []

roles/network_plugin/kube-router/defaults/main.yml

@@ -34,3 +34,15 @@ kube_router_peer_router_ports: ~
 # Setups node CNI to allow hairpin mode, requires node reboots, see
 # https://github.com/cloudnativelabs/kube-router/blob/master/docs/user-guide.md#hairpin-mode
 kube_router_support_hairpin_mode: false
+
+# Adds annotations to kubernetes nodes for advanced configuration of BGP Peers.
+# https://github.com/cloudnativelabs/kube-router/blob/master/docs/bgp.md
+
+# Array of annotations for master
+kube_router_annotations_master: []
+
+# Array of annotations for every node
+kube_router_annotations_node: []
+
+# Array of common annotations for every node
+kube_router_annotations_all: []

roles/network_plugin/kube-router/tasks/annotate.yml

@@ -0,0 +1,21 @@
+---
+- name: kube-router | Add annotations on kube-master
+  command: "{{bin_dir}}/kubectl annotate --overwrite node {{ ansible_hostname }} {{ item }}"
+  with_items:
+  - "{{ kube_router_annotations_master }}"
+  delegate_to: "{{groups['kube-master'][0]}}"
+  when: kube_router_annotations_master is defined
+
+- name: kube-router | Add annotations on kube-node
+  command: "{{bin_dir}}/kubectl annotate --overwrite node {{ ansible_hostname }} {{ item }}"
+  with_items:
+  - "{{ kube_router_annotations_node }}"
+  delegate_to: "{{groups['kube-master'][0]}}"
+  when: kube_router_annotations_node is defined
+
+- name: kube-router | Add common annotations on all servers
+  command: "{{bin_dir}}/kubectl annotate --overwrite node {{ ansible_hostname }} {{ item }}"
+  with_items:
+  - "{{ kube_router_annotations_all }}"
+  delegate_to: "{{groups['kube-master'][0]}}"
+  when: kube_router_annotations_all is defined

roles/network_plugin/kube-router/tasks/main.yml

@@ -1,4 +1,7 @@
 ---
+- name: kube-router | Create annotations
+  include: annotate.yml
+  tags: annotate
 
 - name: kube-router | Copy cni plugins from hyperkube
   command: "{{ docker_bin_dir }}/docker run --rm -v /opt/cni/bin:/cnibindir {{ hyperkube_image_repo }}:{{ hyperkube_image_tag }} /bin/cp -prf /opt/cni/bin/. /cnibindir/"