Optionally ignore the presence of extra calico pools (#2190)

roles/network_plugin/calico/defaults/main.yml

@@ -16,6 +16,9 @@ etcd_cert_dir: /etc/ssl/etcd/ssl
 # Global as_num (/calico/bgp/v1/global/as_num)
 global_as_num: "64512"
 
+# Set to true if you need to configure multiple pools (this is not common)
+calico_ignore_extra_pools: false
+
 # You can set MTU value here. If left undefined or empty, it will
 # not be specified in calico CNI config, so Calico will use built-in
 # defaults. The value should be a number, not a string.

roles/network_plugin/calico/tasks/main.yml

@@ -142,7 +142,7 @@
   fail:
     msg: 'Only one network pool must be configured and it must be the subnet {{ kube_pods_subnet }}.
     Please erase calico configuration and run the playbook again ("etcdctl rm --recursive /calico/v1/ipam/v4/pool")'
-  when: ( calico_pools['node']['nodes'] | length > 1 ) or
+  when: ( calico_pools['node']['nodes'] | length > 1 and not calico_ignore_extra_pools ) or
         ( not calico_pools['node']['nodes'][0]['key'] | search(".*{{ kube_pods_subnet | ipaddr('network') }}.*") )
   run_once: true