networkpolicy.go

// Copyright (c) 2021 Gitpod GmbH. All rights reserved.
// Licensed under the GNU Affero General Public License (AGPL).
// See License.AGPL.txt in the project root for license information.

package proxy

import (
	"fmt"

	"github.com/gitpod-io/gitpod/common-go/baseserver"
	"github.com/gitpod-io/gitpod/installer/pkg/common"

	networkingv1 "k8s.io/api/networking/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/util/intstr"
)

func networkpolicy(ctx *common.RenderContext) ([]runtime.Object, error) {
	labels := common.DefaultLabels(Component)

	return []runtime.Object{&networkingv1.NetworkPolicy{
		TypeMeta: common.TypeMetaNetworkPolicy,
		ObjectMeta: metav1.ObjectMeta{
			Name:      fmt.Sprintf("%s-deny-all-allow-explicit", Component),
			Namespace: ctx.Namespace,
			Labels:    labels,
		},
		Spec: networkingv1.NetworkPolicySpec{
			PodSelector: metav1.LabelSelector{MatchLabels: labels},
			PolicyTypes: []networkingv1.PolicyType{"Ingress"},
			Ingress: []networkingv1.NetworkPolicyIngressRule{{
				Ports: []networkingv1.NetworkPolicyPort{{
					Protocol: common.TCPProtocol,
					Port:     &intstr.IntOrString{IntVal: ContainerHTTPPort},
				}, {
					Protocol: common.TCPProtocol,
					Port:     &intstr.IntOrString{IntVal: ContainerHTTPSPort},
				}, {
					Protocol: common.TCPProtocol,
					Port:     &intstr.IntOrString{IntVal: ContainerSSHPort},
				}},
			}, {
				Ports: []networkingv1.NetworkPolicyPort{{
					Protocol: common.TCPProtocol,
					Port:     &intstr.IntOrString{IntVal: baseserver.BuiltinMetricsPort},
				}},
				From: []networkingv1.NetworkPolicyPeer{{
					NamespaceSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"chart": common.MonitoringChart,
					}},
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.ServerComponent,
					}},
				}},
			}, {
				Ports: []networkingv1.NetworkPolicyPort{{
					Protocol: common.TCPProtocol,
					Port:     &intstr.IntOrString{IntVal: ContainerAnalyticsPort},
				}},
				From: []networkingv1.NetworkPolicyPeer{{
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.ServerComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.WSManagerBridgeComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.WSProxyComponent,
					}},
				}},
			}, {
				Ports: []networkingv1.NetworkPolicyPort{{
					Protocol: common.TCPProtocol,
					Port:     &intstr.IntOrString{IntVal: ContainerConfigcatPort},
				}},
				From: []networkingv1.NetworkPolicyPeer{{
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.ServerComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.WSManagerBridgeComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.IDEServiceComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.PublicApiComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.UsageComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.OpenVSXProxyComponent,
					}},
				}, {
					PodSelector: &metav1.LabelSelector{MatchLabels: map[string]string{
						"component": common.DashboardComponent,
					}},
				}},
			}},
		},
	}}, nil
}