Weave: add extra_args for weave-npc (#8140)

* add weave_npc_extra_args in template

* add defaults weave_npc_extra_args

* add sample for weave_npc_extra_args

inventory/sample/group_vars/k8s_cluster/k8s-net-weave.yml

@@ -59,3 +59,6 @@
 # Extra variables that passing to launch.sh, useful for enabling seed mode, see
 # https://www.weave.works/docs/net/latest/tasks/ipam/ipam/
 # weave_extra_args: ~
+
+# Extra variables for weave_npc that passing to launch.sh, useful for change log level, ex --log-level=error
+# weave_npc_extra_args: ~

roles/network_plugin/weave/defaults/main.yml

@@ -59,3 +59,6 @@ weave_iptables_backend: ~
 # Extra variables that passing to launch.sh, useful for enabling seed mode, see
 # https://www.weave.works/docs/net/latest/tasks/ipam/ipam/
 weave_extra_args: ~
+
+# Extra variables for weave_npc that passing to launch.sh, useful for change log level, ex --log-level=error
+weave_npc_extra_args: ~

roles/network_plugin/weave/templates/weave-net.yml.j2

@@ -230,6 +230,10 @@ items:
                     fieldRef:
                       apiVersion: v1
                       fieldPath: spec.nodeName
+{% if weave_npc_extra_args %}
+                - name: EXTRA_ARGS
+                  value: "{{ weave_npc_extra_args }}"
+{% endif %}                       
               image: {{ weave_npc_image_repo }}:{{ weave_npc_image_tag }}
               imagePullPolicy: {{ k8s_image_pull_policy }}
               resources: