Apply linux node selector to coreDNS deployment (#3688)

* Apply linux node selector to coreDNS deployment

* Remove comment before linux node selector on manifests

* mend

roles/dnsmasq/templates/dnsmasq-autoscaler.yml.j2

@@ -55,6 +55,5 @@ spec:
             - --default-params={"linear":{"nodesPerReplica":{{ dnsmasq_nodes_per_replica }},"preventSinglePointFailure":true}}
             - --logtostderr=true
             - --v={{ kube_log_level }}
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux

roles/dnsmasq/templates/dnsmasq-deploy.yml.j2

@@ -27,7 +27,6 @@ spec:
       tolerations:
         - effect: NoSchedule
           operator: Exists
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux
       containers:

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

@@ -27,6 +27,8 @@ spec:
 {% if kube_version is version('v1.11.1', '>=') %}
       priorityClassName: system-cluster-critical
 {% endif %}
+      nodeSelector:
+        beta.kubernetes.io/os: linux
       serviceAccountName: coredns
       tolerations:
         - key: node-role.kubernetes.io/master

roles/kubernetes-apps/ansible/templates/kubedns-autoscaler.yml.j2

@@ -31,7 +31,6 @@ spec:
 {% if kube_version is version('v1.11.1', '>=') %}
       priorityClassName: system-cluster-critical
 {% endif %}
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux
       tolerations:

roles/kubernetes-apps/ansible/templates/kubedns-deploy.yml.j2

@@ -30,7 +30,6 @@ spec:
 {% if kube_version is version('v1.11.1', '>=') %}
       priorityClassName: system-cluster-critical
 {% endif %}
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux
       tolerations:

roles/kubernetes-apps/ansible/templates/netchecker-agent-ds.yml.j2

@@ -18,7 +18,6 @@ spec:
       tolerations:
         - effect: NoSchedule
           operator: Exists
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux
       containers:

roles/kubernetes-apps/ansible/templates/netchecker-agent-hostnet-ds.yml.j2

@@ -13,7 +13,6 @@ spec:
         app: netchecker-agent-hostnet
     spec:
       hostNetwork: True
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux
 {% if kube_version is version('v1.6', '>=') %}

roles/kubernetes-apps/ingress_controller/ingress_nginx/templates/deploy-default-backend.yml.j2

@@ -45,6 +45,5 @@ spec:
             requests:
               cpu: 10m
               memory: 20Mi
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux

roles/kubernetes/node/templates/manifests/kube-proxy.manifest.j2

@@ -12,7 +12,6 @@ spec:
 {% if kube_version is version('v1.6', '>=') %}
   dnsPolicy: ClusterFirst
 {% endif %}
-  # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
   nodeSelector:
     beta.kubernetes.io/os: linux
 {% if kube_version is version('v1.11.1', '>=') %}

roles/kubernetes/node/templates/manifests/nginx-proxy.manifest.j2

@@ -7,7 +7,6 @@ metadata:
     k8s-app: kube-nginx
 spec:
   hostNetwork: true
-  # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
   nodeSelector:
     beta.kubernetes.io/os: linux
 {% if kube_version is version('v1.11.1', '>=') %}

roles/network_plugin/flannel/templates/cni-flannel.yml.j2

@@ -59,7 +59,6 @@ spec:
       priorityClassName: system-node-critical
 {% endif %}
       serviceAccountName: flannel
-      # When having win nodes in cluster without this patch, this pod cloud try to be created in windows
       nodeSelector:
         beta.kubernetes.io/os: linux
       containers: