CoreDNS deployment extra tolerations (#5364)

* Add extra tolerations for coredns

* dns_extra_tolerations option

* dns_extra_tolerations

* missing starting space in comment

roles/kubernetes-apps/ansible/defaults/main.yml

@@ -8,6 +8,7 @@ dns_nodes_per_replica: 16
 dns_cores_per_replica: 256
 dns_prevent_single_point_failure: "{{ 'true' if dns_min_replicas|int > 1 else 'false' }}"
 coredns_ordinal_suffix: ""
+# dns_extra_tolerations: [{effect: NoSchedule, operator: "Exists"}]
 
 # nodelocaldns
 nodelocaldns_cpu_requests: 100m

roles/kubernetes-apps/ansible/templates/coredns-deployment.yml.j2

@@ -34,6 +34,9 @@ spec:
           effect: NoSchedule
         - key: "CriticalAddonsOnly"
           operator: "Exists"
+{% if dns_extra_tolerations | default(None) %}
+        {{ dns_extra_tolerations | list | to_nice_yaml(indent=2) | indent(8) }}
+{% endif %}
       affinity:
         podAntiAffinity:
           requiredDuringSchedulingIgnoredDuringExecution: