Merge pull request #11722 from k8s-infra-cherrypick-robot/cherry-pick-11694-to-release-2.24

[release-2.24] Fix pretty-printing of coredns and nodelocaldns configmaps

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

@@ -70,7 +70,9 @@ data:
           max_concurrent 1000
 {% if dns_upstream_forward_extra_opts is defined %}
 {% for optname, optvalue in dns_upstream_forward_extra_opts.items() %}
-          {{ optname }} {{ optvalue }}
+          {{ (optname ~ ' ' ~ optvalue) | trim }}
+          {# do not add a trailing space when optvalue == ''
+             workaround for: https://github.com/kubernetes/kubernetes/issues/36222 #}
 {% endfor %}
 {% endif %}
         }

roles/kubernetes-apps/ansible/templates/nodelocaldns-config.yml.j2

@@ -82,7 +82,9 @@ data:
         bind {{ nodelocaldns_ip }}
         forward . {{ upstreamForwardTarget }}{% if dns_upstream_forward_extra_opts is defined %} {
 {% for optname, optvalue in dns_upstream_forward_extra_opts.items() %}
-          {{ optname }} {{ optvalue }}
+          {{ (optname ~ ' ' ~ optvalue) | trim }}
+          {# do not add a trailing space when optvalue == ''
+             workaround for: https://github.com/kubernetes/kubernetes/issues/36222 #}
 {% endfor %}
         }{% endif %}
 
@@ -164,7 +166,9 @@ data:
         bind {{ nodelocaldns_ip }}
         forward . {{ upstreamForwardTarget }}{% if dns_upstream_forward_extra_opts is defined %} {
 {% for optname, optvalue in dns_upstream_forward_extra_opts.items() %}
-          {{ optname }} {{ optvalue }}
+          {{ (optname ~ ' ' ~ optvalue) | trim }}
+          {# do not add a trailing space when optvalue == ''
+             workaround for: https://github.com/kubernetes/kubernetes/issues/36222 #}
 {% endfor %}
         }{% endif %}