[installer] support service type in experimental config

Author: nandajavarma

install/installer/pkg/components/proxy/service.go

@@ -6,6 +6,7 @@ package proxy
 
 import (
 	"fmt"
+	"strings"
 
 	"github.com/gitpod-io/gitpod/installer/pkg/common"
 	"github.com/gitpod-io/gitpod/installer/pkg/config/v1/experimental"
@@ -15,6 +16,19 @@ import (
 )
 
 func service(ctx *common.RenderContext) ([]runtime.Object, error) {
+	serviceType := corev1.ServiceTypeLoadBalancer
+	_ = ctx.WithExperimental(func(cfg *experimental.Config) error {
+		if cfg.Common != nil && cfg.Common.ServiceConfig != nil {
+			st, ok := cfg.Common.ServiceConfig["proxy"]
+			if ok {
+				if strings.ToLower(st.ServiceType) == "clusterip" {
+					serviceType = corev1.ServiceTypeClusterIP
+				}
+			}
+		}
+		return nil
+	})
+
 	loadBalancerIP := ""
 	_ = ctx.WithExperimental(func(cfg *experimental.Config) error {
 		if cfg.WebApp != nil && cfg.WebApp.ProxyConfig != nil && cfg.WebApp.ProxyConfig.StaticIP != "" {
@@ -57,8 +71,10 @@ func service(ctx *common.RenderContext) ([]runtime.Object, error) {
 	}
 
 	return common.GenerateService(Component, ports, func(service *corev1.Service) {
-		service.Spec.Type = corev1.ServiceTypeLoadBalancer
-		service.Spec.LoadBalancerIP = loadBalancerIP
+		service.Spec.Type = serviceType
+		if serviceType == corev1.ServiceTypeLoadBalancer {
+			service.Spec.LoadBalancerIP = loadBalancerIP
+		}
 
 		service.Annotations["external-dns.alpha.kubernetes.io/hostname"] = fmt.Sprintf("%s,*.%s,*.ws.%s", ctx.Config.Domain, ctx.Config.Domain, ctx.Config.Domain)
 		service.Annotations["cloud.google.com/neg"] = `{"exposed_ports": {"80":{},"443": {}}}`

install/installer/pkg/config/v1/experimental/experimental.go

@@ -24,8 +24,15 @@ type Config struct {
 }
 
 type CommonConfig struct {
-	PodConfig                map[string]*PodConfig `json:"podConfig,omitempty"`
-	StaticMessagebusPassword string                `json:"staticMessagebusPassword"`
+	PodConfig                map[string]*PodConfig     `json:"podConfig,omitempty"`
+	ServiceConfig            map[string]*ServiceConfig `json:"serviceConfig,omitempty"`
+	StaticMessagebusPassword string                    `json:"staticMessagebusPassword"`
+}
+
+// ServiceConfig enables modification of type of service to `ClusterIP` if needed,
+// currently supported only for `proxy` service
+type ServiceConfig struct {
+	ServiceType string `json:"serviceType,omitempty"`
 }
 
 type PodConfig struct {