Updated cluster/addons.go to allow it to parse and send new http_port and https_ports to the ingress template

Fixed up yaml import package

Updated rke ingress addon to support a new field hostNetwork. Users can use this now to run ingress controller on overlay network only

Ported additional ingress types changes into types/rke_types

Fixed linting errors related to variable names in addons.go and rke_types

Changed types for hostNetwork and http/https ports

Added validation to check http/https ports are different

Changed rke_types for additional spec in ingressConfig. Changed validation and default logic accordingly

cluster/cluster.go

@@ -514,6 +514,9 @@ func parseIngressConfig(clusterFile string, rkeConfig *v3.RancherKubernetesEngin
 	if err := parseIngressExtraVolumeMounts(ingressMap, rkeConfig); err != nil {
 		return err
 	}
+	if err := parseIngressDefaults(ingressMap, rkeConfig); err != nil {
+		return err
+	}
 	return nil
 }
 
@@ -598,6 +601,21 @@ func parseIngressExtraVolumeMounts(ingressMap map[string]interface{}, rkeConfig
 	return nil
 }
 
+func parseIngressDefaults(ingressMap map[string]interface{}, rkeConfig *v3.RancherKubernetesEngineConfig) error {
+	// Setting up default behaviour so as to not catch out
+	// existing users who use new version of RKE
+	if _, ok := ingressMap["network_mode"]; !ok {
+		rkeConfig.Ingress.NetworkMode = DefaultNetworkMode
+	}
+	if _, ok := ingressMap["http_port"]; !ok {
+		rkeConfig.Ingress.HTTPPort = DefaultHTTPPort
+	}
+	if _, ok := ingressMap["https_port"]; !ok {
+		rkeConfig.Ingress.HTTPSPort = DefaultHTTPSPort
+	}
+	return nil
+}
+
 func parseNodeDrainInput(clusterFile string, rkeConfig *v3.RancherKubernetesEngineConfig) error {
 	// setting some defaults here because for these fields there's no way of differentiating between user provided null value vs golang setting it to null during unmarshal
 	if rkeConfig.UpgradeStrategy == nil || rkeConfig.UpgradeStrategy.DrainInput == nil {