Fix upgrade for all daemonset type resources

Daemonsets cannot be simply upgraded through a single API call,
regardless of any kubectl documentation. The resource must be
purged and then recreated in order to make any changes.

roles/kubernetes-apps/network_plugin/canal/tasks/main.yaml

@@ -7,6 +7,18 @@
     resource: "configmap"
     namespace: "{{system_namespace}}"
 
+#FIXME: remove if kubernetes/features#124 is implemented
+- name: Purge old flannel and canal-node
+  run_once: true
+  kube:
+    name: "canal-node"
+    kubectl: "{{ bin_dir }}/kubectl"
+    filename: "{{ kube_config_dir }}/canal-node.yml"
+    resource: "ds"
+    namespace: "{{system_namespace}}"
+    state: absent
+  when: inventory_hostname == groups['kube-master'][0] and canal_node_manifest.changed
+
 - name: Start flannel and calico-node
   run_once: true
   kube:
@@ -15,3 +27,6 @@
     filename: "{{kube_config_dir}}/canal-node.yaml"
     resource: "ds"
     namespace: "{{system_namespace}}"
+    state: "{{ item | ternary('latest','present') }}"
+  with_items: "{{ canal_node_manifest.changed }}"
+