check if group kube-ingress is not empty

fix spelling mistaker ingress_nginx_host_network
set default value for ingress_nginx_host_network: false

inventory/sample/group_vars/k8s-cluster.yml

@@ -189,7 +189,7 @@ cephfs_provisioner_enabled: false
 
 # Nginx ingress controller deployment
 ingress_nginx_enabled: false
-# ingres_nginx_host_network: true
+# ingress_nginx_host_network: false
 # ingress_nginx_namespace: "ingress-nginx"
 # ingress_nginx_insecure_port: 80
 # ingress_nginx_secure_port: 443

roles/kubernetes-apps/ingress_controller/ingress_nginx/defaults/main.yml

@@ -6,6 +6,7 @@ ingress_nginx_controller_image_repo: quay.io/kubernetes-ingress-controller/nginx
 ingress_nginx_controller_image_tag: 0.11.0
 
 ingress_nginx_namespace: "ingress-nginx"
+ingress_nginx_host_network: false
 ingress_nginx_insecure_port: 80
 ingress_nginx_secure_port: 443
 ingress_nginx_configmap: {}

roles/kubernetes-apps/ingress_controller/ingress_nginx/templates/ingress-nginx-controller-ds.yml.j2

@@ -21,10 +21,10 @@ spec:
         k8s-app: ingress-nginx
         version: v{{ ingress_nginx_controller_image_tag }}
     spec:
-{% if ingres_nginx_host_network is defined and ingres_nginx_host_network %}
+{% if ingress_nginx_host_network %}
       hostNetwork: true
 {% endif %}
-{% if 'kube-ingress' in groups %}
+{% if 'kube-ingress' in groups and groups['kube-ingress']|length > 0 %}
       nodeSelector:
         node-role.kubernetes.io/ingress: "true"
 {% endif %}