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Add egress traffic conformance tests for TCP protocol
This commit tests .Spec.Egress specifically. We test deny, allow and pass actions. We test TCP protocol with and without port combination. TODO: In future add test for port range and named ports. Signed-off-by: Surya Seetharaman <[email protected]>
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‎conformance/tests/admin-network-policy-core-egress-tcp-rules.go

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/*
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Copyright 2022 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package tests
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import (
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"context"
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"testing"
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"github.com/stretchr/testify/assert"
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v1 "k8s.io/api/core/v1"
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"k8s.io/kubernetes/test/e2e/framework"
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"sigs.k8s.io/controller-runtime/pkg/client"
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"sigs.k8s.io/network-policy-api/apis/v1alpha1"
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"sigs.k8s.io/network-policy-api/conformance/utils/kubernetes"
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"sigs.k8s.io/network-policy-api/conformance/utils/suite"
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)
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func init() {
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ConformanceTests = append(ConformanceTests,
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AdminNetworkPolicyEgressTCP,
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)
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}
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var AdminNetworkPolicyEgressTCP = suite.ConformanceTest{
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ShortName: "AdminNetworkPolicyEgressTCP",
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Description: "Tests support for egress traffic (TCP protocol) using admin network policy API based on a server and client model",
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Features: []suite.SupportedFeature{
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suite.SupportAdminNetworkPolicy,
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},
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Manifests: []string{"tests/admin-network-policy-core-egress-tcp-rules_base.yaml"},
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Test: func(t *testing.T, s *suite.ConformanceTestSuite) {
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t.Run("Should support an 'allow-egress' policy for TCP protocol; ensure rule ordering is respected", func(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), s.TimeoutConfig.GetTimeout)
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defer cancel()
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// This test uses `egress-tcp` ANP
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// luna-lovegood-0 is our server pod in ravenclaw namespace
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clientPod := &v1.Pod{}
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err := s.Client.Get(ctx, client.ObjectKey{
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Namespace: "network-policy-conformance-ravenclaw",
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Name: "luna-lovegood-0",
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}, clientPod)
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framework.ExpectNoError(err, "unable to fetch the server pod")
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// harry-potter-0 is our client pod in gryffindor namespace
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// ensure egress is ALLOWED to ravenclaw from gryffindor
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// egressRule at index0 will take precedence over egressRule at index1; thus ALLOW takes precedence over DENY since rules are ordered
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success := kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-0", "tcp",
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clientPod.Status.PodIP, int32(80), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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success = kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-1", "tcp",
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clientPod.Status.PodIP, int32(8080), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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})
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t.Run("Should support an 'allow-egress' policy for TCP protocol at the specified port", func(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), s.TimeoutConfig.GetTimeout)
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defer cancel()
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// This test uses `egress-tcp` ANP
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// cedric-diggory-1 is our server pod in hufflepuff namespace
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clientPod := &v1.Pod{}
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err := s.Client.Get(ctx, client.ObjectKey{
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Namespace: "network-policy-conformance-hufflepuff",
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Name: "cedric-diggory-1",
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}, clientPod)
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framework.ExpectNoError(err, "unable to fetch the server pod")
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// harry-potter-0 is our client pod in gryffindor namespace
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// ensure egress is ALLOWED to hufflepuff from gryffindor at port 80; egressRule at index5
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success := kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-0", "tcp",
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clientPod.Status.PodIP, int32(8080), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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// harry-potter-1 is our client pod in gryffindor namespace
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// ensure egress is DENIED to hufflepuff from gryffindor for rest of the traffic; egressRule at index6
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success = kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-1", "tcp",
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clientPod.Status.PodIP, int32(80), s.TimeoutConfig.RequestTimeout, false)
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assert.Equal(t, true, success)
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})
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t.Run("Should support an 'deny-egress' policy for TCP protocol; ensure rule ordering is respected", func(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), s.TimeoutConfig.GetTimeout)
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defer cancel()
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// This test uses `egress-tcp` ANP
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// luna-lovegood-1 is our server pod in ravenclaw namespace
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clientPod := &v1.Pod{}
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err := s.Client.Get(ctx, client.ObjectKey{
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Namespace: "network-policy-conformance-ravenclaw",
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Name: "luna-lovegood-1",
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}, clientPod)
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framework.ExpectNoError(err, "unable to fetch the server pod")
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anp := &v1alpha1.AdminNetworkPolicy{}
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err = s.Client.Get(ctx, client.ObjectKey{
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Name: "egress-tcp",
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}, anp)
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framework.ExpectNoError(err, "unable to fetch the admin network policy")
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// swap rules at index0 and index1
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allowRule := anp.DeepCopy().Spec.Egress[0]
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anp.Spec.Egress[0] = anp.DeepCopy().Spec.Egress[1]
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anp.Spec.Egress[1] = allowRule
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err = s.Client.Update(ctx, anp)
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framework.ExpectNoError(err, "unable to update the admin network policy")
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// harry-potter-0 is our client pod in gryffindor namespace
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// ensure egress is DENIED to ravenclaw from gryffindor
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// egressRule at index0 will take precedence over egressRule at index1; thus DENY takes precedence over ALLOW since rules are ordered
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success := kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-0", "tcp",
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clientPod.Status.PodIP, int32(80), s.TimeoutConfig.RequestTimeout, false)
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assert.Equal(t, true, success)
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// harry-potter-1 is our client pod in gryffindor namespace
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success = kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-1", "tcp",
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clientPod.Status.PodIP, int32(8080), s.TimeoutConfig.RequestTimeout, false)
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assert.Equal(t, true, success)
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})
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t.Run("Should support a 'deny-egress' policy for TCP protocol at the specified port", func(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), s.TimeoutConfig.GetTimeout)
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defer cancel()
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// This test uses `egress-tcp` ANP
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// draco-malfoy-0 is our server pod in slytherin namespace
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clientPod := &v1.Pod{}
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err := s.Client.Get(ctx, client.ObjectKey{
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Namespace: "network-policy-conformance-slytherin",
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Name: "draco-malfoy-0",
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}, clientPod)
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framework.ExpectNoError(err, "unable to fetch the server pod")
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// harry-potter-0 is our client pod in gryffindor namespace
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// ensure egress to slytherin is DENIED from gryffindor at port 80; egressRule at index3
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success := kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-0", "tcp",
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clientPod.Status.PodIP, int32(80), s.TimeoutConfig.RequestTimeout, false)
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assert.Equal(t, true, success)
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// harry-potter-1 is our client pod in gryffindor namespace
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// ensure egress to slytherin is ALLOWED from gryffindor for rest of the traffic; matches no rules hence allowed
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success = kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-1", "tcp",
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clientPod.Status.PodIP, int32(8080), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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})
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t.Run("Should support an 'pass-egress' policy for TCP protocol; ensure rule ordering is respected", func(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), s.TimeoutConfig.GetTimeout)
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defer cancel()
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// This test uses `egress-tcp` ANP
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// luna-lovegood-0 is our server pod in ravenclaw namespace
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clientPod := &v1.Pod{}
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err := s.Client.Get(ctx, client.ObjectKey{
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Namespace: "network-policy-conformance-ravenclaw",
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Name: "luna-lovegood-0",
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}, clientPod)
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framework.ExpectNoError(err, "unable to fetch the server pod")
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anp := &v1alpha1.AdminNetworkPolicy{}
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err = s.Client.Get(ctx, client.ObjectKey{
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Name: "egress-tcp",
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}, anp)
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framework.ExpectNoError(err, "unable to fetch the admin network policy")
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// swap rules at index0 and index2
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denyRule := anp.DeepCopy().Spec.Egress[0]
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anp.Spec.Egress[0] = anp.DeepCopy().Spec.Egress[2]
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anp.Spec.Egress[2] = denyRule
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err = s.Client.Update(ctx, anp)
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framework.ExpectNoError(err, "unable to update the admin network policy")
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// harry-potter-0 is our server pod in gryffindor namespace
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// ensure egress is PASSED from gryffindor to ravenclaw
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// egressRule at index0 will take precedence over egressRule at index1&index2; thus PASS takes precedence over ALLOW/DENY since rules are ordered
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success := kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-0", "tcp",
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clientPod.Status.PodIP, int32(80), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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// harry-potter-1 is our server pod in gryffindor namespace
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success = kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-1", "tcp",
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clientPod.Status.PodIP, int32(8080), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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})
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t.Run("Should support a 'pass-egress' policy for TCP protocol at the specified port", func(t *testing.T) {
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ctx, cancel := context.WithTimeout(context.Background(), s.TimeoutConfig.GetTimeout)
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defer cancel()
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// This test uses `egress-tcp` ANP
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// draco-malfoy-0 is our server pod in slytherin namespace
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clientPod := &v1.Pod{}
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err := s.Client.Get(ctx, client.ObjectKey{
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Namespace: "network-policy-conformance-slytherin",
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Name: "draco-malfoy-0",
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}, clientPod)
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framework.ExpectNoError(err, "unable to fetch the server pod")
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anp := &v1alpha1.AdminNetworkPolicy{}
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err = s.Client.Get(ctx, client.ObjectKey{
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Name: "egress-tcp",
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}, anp)
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framework.ExpectNoError(err, "unable to fetch the admin network policy")
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// swap rules at index3 and index4
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denyRule := anp.DeepCopy().Spec.Egress[3]
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anp.Spec.Egress[3] = anp.DeepCopy().Spec.Egress[4]
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anp.Spec.Egress[4] = denyRule
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err = s.Client.Update(ctx, anp)
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framework.ExpectNoError(err, "unable to update the admin network policy")
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// harry-potter-0 is our client pod in gryffindor namespace
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// ensure egress from gryffindor is PASSED to slytherin at port 80; egressRule at index3
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success := kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-0", "tcp",
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clientPod.Status.PodIP, int32(80), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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// harry-potter-1 is our client pod in gryffindor namespace
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// ensure egress from gryffindor is ALLOWED to slytherin for rest of the traffic; matches no rules hence allowed
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success = kubernetes.PokeServer(t, "network-policy-conformance-gryffindor", "harry-potter-1", "tcp",
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clientPod.Status.PodIP, int32(8080), s.TimeoutConfig.RequestTimeout, true)
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assert.Equal(t, true, success)
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})
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},
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}

‎conformance/tests/admin-network-policy-core-egress-tcp-rules_base.yaml

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apiVersion: policy.networking.k8s.io/v1alpha1
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kind: AdminNetworkPolicy
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metadata:
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name: egress-tcp
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spec:
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priority: 6
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subject:
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namespaces:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-gryffindor
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egress:
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- name: "allow-to-ravenclaw-everything"
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action: "Allow"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-ravenclaw
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- name: "deny-to-ravenclaw-everything"
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action: "Deny"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-ravenclaw
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- name: "pass-to-ravenclaw-everything"
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action: "Pass"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-ravenclaw
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- name: "deny-to-slytherin-at-port-80"
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action: "Deny"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-slytherin
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ports:
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- portNumber:
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protocol: TCP
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port: 80
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- name: "pass-to-slytherin-at-port-80"
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action: "Pass"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-slytherin
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ports:
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- portNumber:
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protocol: TCP
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port: 80
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- name: "allow-to-hufflepuff-at-port-8080"
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action: "Allow"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-hufflepuff
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ports:
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- portNumber:
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protocol: TCP
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port: 8080
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- name: "deny-to-hufflepuff-everything-else"
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action: "Deny"
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to:
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- namespaces:
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namespaceSelector:
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matchLabels:
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kubernetes.io/metadata.name: network-policy-conformance-hufflepuff

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