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gce_loadbalancer_internal_test.go
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gce_loadbalancer_internal_test.go
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// +build !providerless
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package gce
import (
"context"
"fmt"
"reflect"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/GoogleCloudPlatform/k8s-cloud-provider/pkg/cloud"
"github.com/GoogleCloudPlatform/k8s-cloud-provider/pkg/cloud/meta"
"github.com/GoogleCloudPlatform/k8s-cloud-provider/pkg/cloud/mock"
computebeta "google.golang.org/api/compute/v0.beta"
"google.golang.org/api/compute/v1"
"k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/types"
"k8s.io/client-go/tools/record"
"k8s.io/cloud-provider"
servicehelper "k8s.io/cloud-provider/service/helpers"
)
func createInternalLoadBalancer(gce *Cloud, svc *v1.Service, existingFwdRule *compute.ForwardingRule, nodeNames []string, clusterName, clusterID, zoneName string) (*v1.LoadBalancerStatus, error) {
nodes, err := createAndInsertNodes(gce, nodeNames, zoneName)
if err != nil {
return nil, err
}
return gce.ensureInternalLoadBalancer(
clusterName,
clusterID,
svc,
existingFwdRule,
nodes,
)
}
func TestEnsureInternalBackendServiceUpdates(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
nodeNames := []string{"test-node-1"}
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
require.NoError(t, err)
igName := makeInstanceGroupName(vals.ClusterID)
igLinks, err := gce.ensureInternalInstanceGroups(igName, nodes)
require.NoError(t, err)
sharedBackend := shareBackendService(svc)
bsName := makeBackendServiceName(lbName, vals.ClusterID, sharedBackend, cloud.SchemeInternal, "TCP", svc.Spec.SessionAffinity)
err = gce.ensureInternalBackendService(bsName, "description", svc.Spec.SessionAffinity, cloud.SchemeInternal, "TCP", igLinks, "")
require.NoError(t, err)
// Update the Internal Backend Service with a new ServiceAffinity
err = gce.ensureInternalBackendService(bsName, "description", v1.ServiceAffinityNone, cloud.SchemeInternal, "TCP", igLinks, "")
require.NoError(t, err)
bs, err := gce.GetRegionBackendService(bsName, gce.region)
assert.NoError(t, err)
assert.Equal(t, bs.SessionAffinity, strings.ToUpper(string(v1.ServiceAffinityNone)))
}
func TestEnsureInternalBackendServiceGroups(t *testing.T) {
t.Parallel()
for desc, tc := range map[string]struct {
mockModifier func(*cloud.MockGCE)
}{
"Basic workflow": {},
"GetRegionBackendService failed": {
mockModifier: func(c *cloud.MockGCE) {
c.MockRegionBackendServices.GetHook = mock.GetRegionBackendServicesErrHook
},
},
"UpdateRegionBackendServices failed": {
mockModifier: func(c *cloud.MockGCE) {
c.MockRegionBackendServices.UpdateHook = mock.UpdateRegionBackendServicesErrHook
},
},
} {
t.Run(desc, func(t *testing.T) {
vals := DefaultTestClusterValues()
nodeNames := []string{"test-node-1"}
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
require.NoError(t, err)
igName := makeInstanceGroupName(vals.ClusterID)
igLinks, err := gce.ensureInternalInstanceGroups(igName, nodes)
require.NoError(t, err)
sharedBackend := shareBackendService(svc)
bsName := makeBackendServiceName(lbName, vals.ClusterID, sharedBackend, cloud.SchemeInternal, "TCP", svc.Spec.SessionAffinity)
err = gce.ensureInternalBackendService(bsName, "description", svc.Spec.SessionAffinity, cloud.SchemeInternal, "TCP", igLinks, "")
require.NoError(t, err)
// Update the BackendService with new InstanceGroups
if tc.mockModifier != nil {
tc.mockModifier(gce.c.(*cloud.MockGCE))
}
newIGLinks := []string{"new-test-ig-1", "new-test-ig-2"}
err = gce.ensureInternalBackendServiceGroups(bsName, newIGLinks)
if tc.mockModifier != nil {
assert.Error(t, err)
return
}
assert.NoError(t, err)
bs, err := gce.GetRegionBackendService(bsName, gce.region)
assert.NoError(t, err)
// Check that the Backends reflect the new InstanceGroups
backends := backendsFromGroupLinks(newIGLinks)
assert.Equal(t, bs.Backends, backends)
})
}
}
func TestEnsureInternalInstanceGroupsLimit(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
nodeNames := []string{}
for i := 0; i < maxInstancesPerInstanceGroup+5; i++ {
nodeNames = append(nodeNames, fmt.Sprintf("node-%d", i))
}
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
require.NoError(t, err)
igName := makeInstanceGroupName(vals.ClusterID)
_, err = gce.ensureInternalInstanceGroups(igName, nodes)
require.NoError(t, err)
instances, err := gce.ListInstancesInInstanceGroup(igName, vals.ZoneName, allInstances)
require.NoError(t, err)
assert.Equal(t, maxInstancesPerInstanceGroup, len(instances))
}
func TestEnsureInternalLoadBalancer(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
nodeNames := []string{"test-node-1"}
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
status, err := createInternalLoadBalancer(gce, svc, nil, nodeNames, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
assert.NotEmpty(t, status.Ingress)
assertInternalLbResources(t, gce, svc, vals, nodeNames)
}
func TestEnsureInternalLoadBalancerDeprecatedAnnotation(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
nodeNames := []string{"test-node-1"}
gce, err := fakeGCECloud(vals)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
svc := fakeLoadBalancerServiceDeprecatedAnnotation(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
if err != nil {
t.Errorf("Failed to create service %s, err %v", svc.Name, err)
}
status, err := gce.EnsureLoadBalancer(context.Background(), vals.ClusterName, svc, nodes)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
assert.NotEmpty(t, status.Ingress)
assertInternalLbResources(t, gce, svc, vals, nodeNames)
// Now add the latest annotation and change scheme to external
svc.Annotations[ServiceAnnotationLoadBalancerType] = ""
status, err = gce.EnsureLoadBalancer(context.Background(), vals.ClusterName, svc, nodes)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
assert.NotEmpty(t, status.Ingress)
assertInternalLbResourcesDeleted(t, gce, svc, vals, false)
assertExternalLbResources(t, gce, svc, vals, nodeNames)
// Delete the service
err = gce.EnsureLoadBalancerDeleted(context.Background(), vals.ClusterName, svc)
if err != nil {
t.Errorf("Unexpected error %v", err)
}
assertExternalLbResourcesDeleted(t, gce, svc, vals, true)
assertInternalLbResourcesDeleted(t, gce, svc, vals, true)
}
func TestEnsureInternalLoadBalancerWithExistingResources(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
nodeNames := []string{"test-node-1"}
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
// Create the expected resources necessary for an Internal Load Balancer
nm := types.NamespacedName{Name: svc.Name, Namespace: svc.Namespace}
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
sharedHealthCheck := !servicehelper.RequestsOnlyLocalTraffic(svc)
hcName := makeHealthCheckName(lbName, vals.ClusterID, sharedHealthCheck)
hcPath, hcPort := GetNodesHealthCheckPath(), GetNodesHealthCheckPort()
existingHC := newInternalLBHealthCheck(hcName, nm, sharedHealthCheck, hcPath, hcPort)
err = gce.CreateHealthCheck(existingHC)
require.NoError(t, err)
nodes, err := createAndInsertNodes(gce, nodeNames, vals.ZoneName)
require.NoError(t, err)
igName := makeInstanceGroupName(vals.ClusterID)
igLinks, err := gce.ensureInternalInstanceGroups(igName, nodes)
require.NoError(t, err)
sharedBackend := shareBackendService(svc)
bsDescription := makeBackendServiceDescription(nm, sharedBackend)
bsName := makeBackendServiceName(lbName, vals.ClusterID, sharedBackend, cloud.SchemeInternal, "TCP", svc.Spec.SessionAffinity)
err = gce.ensureInternalBackendService(bsName, bsDescription, svc.Spec.SessionAffinity, cloud.SchemeInternal, "TCP", igLinks, existingHC.SelfLink)
require.NoError(t, err)
_, err = createInternalLoadBalancer(gce, svc, nil, nodeNames, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
}
func TestEnsureInternalLoadBalancerClearPreviousResources(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
// Create a ForwardingRule that's missing an IP address
existingFwdRule := &compute.ForwardingRule{
Name: lbName,
IPAddress: "",
Ports: []string{"123"},
IPProtocol: "TCP",
LoadBalancingScheme: string(cloud.SchemeInternal),
}
gce.CreateRegionForwardingRule(existingFwdRule, gce.region)
// Create a Firewall that's missing a Description
existingFirewall := &compute.Firewall{
Name: lbName,
Network: gce.networkURL,
Allowed: []*compute.FirewallAllowed{
{
IPProtocol: "tcp",
Ports: []string{"123"},
},
},
}
gce.CreateFirewall(existingFirewall)
sharedHealthCheck := !servicehelper.RequestsOnlyLocalTraffic(svc)
hcName := makeHealthCheckName(lbName, vals.ClusterID, sharedHealthCheck)
hcPath, hcPort := GetNodesHealthCheckPath(), GetNodesHealthCheckPort()
nm := types.NamespacedName{Name: svc.Name, Namespace: svc.Namespace}
// Create a healthcheck with an incorrect threshold
existingHC := newInternalLBHealthCheck(hcName, nm, sharedHealthCheck, hcPath, hcPort)
existingHC.CheckIntervalSec = gceHcCheckIntervalSeconds - 1
gce.CreateHealthCheck(existingHC)
// Create a backend Service that's missing Description and Backends
sharedBackend := shareBackendService(svc)
backendServiceName := makeBackendServiceName(lbName, vals.ClusterID, sharedBackend, cloud.SchemeInternal, "TCP", svc.Spec.SessionAffinity)
existingBS := &compute.BackendService{
Name: lbName,
Protocol: "TCP",
HealthChecks: []string{existingHC.SelfLink},
SessionAffinity: translateAffinityType(svc.Spec.SessionAffinity),
LoadBalancingScheme: string(cloud.SchemeInternal),
}
gce.CreateRegionBackendService(existingBS, gce.region)
existingFwdRule.BackendService = existingBS.Name
_, err = createInternalLoadBalancer(gce, svc, existingFwdRule, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
// Expect new resources with the correct attributes to be created
rule, _ := gce.GetRegionForwardingRule(lbName, gce.region)
assert.NotEqual(t, existingFwdRule, rule)
firewall, err := gce.GetFirewall(MakeFirewallName(lbName))
require.NoError(t, err)
assert.NotEqual(t, firewall, existingFirewall)
healthcheck, err := gce.GetHealthCheck(hcName)
require.NoError(t, err)
assert.NotEqual(t, healthcheck, existingHC)
bs, err := gce.GetRegionBackendService(backendServiceName, gce.region)
require.NoError(t, err)
assert.NotEqual(t, bs, existingBS)
}
func TestEnsureInternalLoadBalancerHealthCheckConfigurable(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
sharedHealthCheck := !servicehelper.RequestsOnlyLocalTraffic(svc)
hcName := makeHealthCheckName(lbName, vals.ClusterID, sharedHealthCheck)
hcPath, hcPort := GetNodesHealthCheckPath(), GetNodesHealthCheckPort()
nm := types.NamespacedName{Name: svc.Name, Namespace: svc.Namespace}
// Create a healthcheck with an incorrect threshold
existingHC := newInternalLBHealthCheck(hcName, nm, sharedHealthCheck, hcPath, hcPort)
existingHC.CheckIntervalSec = gceHcCheckIntervalSeconds * 10
gce.CreateHealthCheck(existingHC)
_, err = createInternalLoadBalancer(gce, svc, nil, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
healthcheck, err := gce.GetHealthCheck(hcName)
require.NoError(t, err)
assert.Equal(t, healthcheck, existingHC)
}
func TestUpdateInternalLoadBalancerBackendServices(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
nodeName := "test-node-1"
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
_, err = createInternalLoadBalancer(gce, svc, nil, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
// BackendService exists prior to updateInternalLoadBalancer call, but has
// incorrect (missing) attributes.
// ensureInternalBackendServiceGroups is called and creates the correct
// BackendService
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
sharedBackend := shareBackendService(svc)
backendServiceName := makeBackendServiceName(lbName, vals.ClusterID, sharedBackend, cloud.SchemeInternal, "TCP", svc.Spec.SessionAffinity)
existingBS := &compute.BackendService{
Name: backendServiceName,
Protocol: "TCP",
SessionAffinity: translateAffinityType(svc.Spec.SessionAffinity),
LoadBalancingScheme: string(cloud.SchemeInternal),
}
gce.CreateRegionBackendService(existingBS, gce.region)
nodes, err := createAndInsertNodes(gce, []string{nodeName}, vals.ZoneName)
require.NoError(t, err)
err = gce.updateInternalLoadBalancer(vals.ClusterName, vals.ClusterID, svc, nodes)
assert.NoError(t, err)
bs, err := gce.GetRegionBackendService(backendServiceName, gce.region)
require.NoError(t, err)
// Check that the new BackendService has the correct attributes
urlBase := fmt.Sprintf("https://www.googleapis.com/compute/v1/projects/%s", vals.ProjectID)
assert.NotEqual(t, existingBS, bs)
assert.Equal(
t,
bs.SelfLink,
fmt.Sprintf("%s/regions/%s/backendServices/%s", urlBase, vals.Region, bs.Name),
)
assert.Equal(t, bs.Description, `{"kubernetes.io/service-name":"/`+svc.Name+`"}`)
assert.Equal(
t,
bs.HealthChecks,
[]string{fmt.Sprintf("%s/global/healthChecks/k8s-%s-node", urlBase, vals.ClusterID)},
)
}
func TestUpdateInternalLoadBalancerNodes(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
node1Name := []string{"test-node-1"}
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
nodes, err := createAndInsertNodes(gce, node1Name, vals.ZoneName)
require.NoError(t, err)
_, err = gce.ensureInternalLoadBalancer(vals.ClusterName, vals.ClusterID, svc, nil, nodes)
assert.NoError(t, err)
// Replace the node in initial zone; add new node in a new zone.
node2Name, node3Name := "test-node-2", "test-node-3"
newNodesZoneA, err := createAndInsertNodes(gce, []string{node2Name}, vals.ZoneName)
require.NoError(t, err)
newNodesZoneB, err := createAndInsertNodes(gce, []string{node3Name}, vals.SecondaryZoneName)
require.NoError(t, err)
nodes = append(newNodesZoneA, newNodesZoneB...)
err = gce.updateInternalLoadBalancer(vals.ClusterName, vals.ClusterID, svc, nodes)
assert.NoError(t, err)
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
sharedBackend := shareBackendService(svc)
backendServiceName := makeBackendServiceName(lbName, vals.ClusterID, sharedBackend, cloud.SchemeInternal, "TCP", svc.Spec.SessionAffinity)
bs, err := gce.GetRegionBackendService(backendServiceName, gce.region)
require.NoError(t, err)
assert.Equal(t, 2, len(bs.Backends), "Want two backends referencing two instances groups")
for _, zone := range []string{vals.ZoneName, vals.SecondaryZoneName} {
var found bool
for _, be := range bs.Backends {
if strings.Contains(be.Group, zone) {
found = true
break
}
}
assert.True(t, found, "Expected list of backends to have zone %q", zone)
}
// Expect initial zone to have test-node-2
igName := makeInstanceGroupName(vals.ClusterID)
instances, err := gce.ListInstancesInInstanceGroup(igName, vals.ZoneName, "ALL")
require.NoError(t, err)
assert.Equal(t, 1, len(instances))
assert.Contains(
t,
instances[0].Instance,
fmt.Sprintf("projects/%s/zones/%s/instances/%s", vals.ProjectID, vals.ZoneName, node2Name),
)
// Expect initial zone to have test-node-3
instances, err = gce.ListInstancesInInstanceGroup(igName, vals.SecondaryZoneName, "ALL")
require.NoError(t, err)
assert.Equal(t, 1, len(instances))
assert.Contains(
t,
instances[0].Instance,
fmt.Sprintf("projects/%s/zones/%s/instances/%s", vals.ProjectID, vals.SecondaryZoneName, node3Name),
)
}
func TestEnsureInternalLoadBalancerDeleted(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
_, err = createInternalLoadBalancer(gce, svc, nil, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
err = gce.ensureInternalLoadBalancerDeleted(vals.ClusterName, vals.ClusterID, svc)
assert.NoError(t, err)
assertInternalLbResourcesDeleted(t, gce, svc, vals, true)
}
func TestEnsureInternalLoadBalancerDeletedTwiceDoesNotError(t *testing.T) {
t.Parallel()
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
_, err = createInternalLoadBalancer(gce, svc, nil, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
err = gce.ensureInternalLoadBalancerDeleted(vals.ClusterName, vals.ClusterID, svc)
assert.NoError(t, err)
// Deleting the loadbalancer and resources again should not cause an error.
err = gce.ensureInternalLoadBalancerDeleted(vals.ClusterName, vals.ClusterID, svc)
assert.NoError(t, err)
assertInternalLbResourcesDeleted(t, gce, svc, vals, true)
}
func TestEnsureInternalLoadBalancerWithSpecialHealthCheck(t *testing.T) {
vals := DefaultTestClusterValues()
nodeName := "test-node-1"
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
healthCheckNodePort := int32(10101)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc.Spec.HealthCheckNodePort = healthCheckNodePort
svc.Spec.Type = v1.ServiceTypeLoadBalancer
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
status, err := createInternalLoadBalancer(gce, svc, nil, []string{nodeName}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
assert.NotEmpty(t, status.Ingress)
loadBalancerName := gce.GetLoadBalancerName(context.TODO(), "", svc)
hc, err := gce.GetHealthCheck(loadBalancerName)
assert.NoError(t, err)
assert.NotNil(t, hc)
assert.Equal(t, int64(healthCheckNodePort), hc.HttpHealthCheck.Port)
}
func TestClearPreviousInternalResources(t *testing.T) {
// Configure testing environment.
vals := DefaultTestClusterValues()
svc := fakeLoadbalancerService(string(LBTypeInternal))
gce, err := fakeGCECloud(vals)
require.NoError(t, err)
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
loadBalancerName := gce.GetLoadBalancerName(context.TODO(), "", svc)
nm := types.NamespacedName{Name: svc.Name, Namespace: svc.Namespace}
c := gce.c.(*cloud.MockGCE)
require.NoError(t, err)
hc1, err := gce.ensureInternalHealthCheck("hc1", nm, false, "healthz", 12345)
require.NoError(t, err)
hc2, err := gce.ensureInternalHealthCheck("hc2", nm, false, "healthz", 12346)
require.NoError(t, err)
err = gce.ensureInternalBackendService(svc.ObjectMeta.Name, "", svc.Spec.SessionAffinity, cloud.SchemeInternal, v1.ProtocolTCP, []string{}, "")
require.NoError(t, err)
backendSvc, err := gce.GetRegionBackendService(svc.ObjectMeta.Name, gce.region)
require.NoError(t, err)
backendSvc.HealthChecks = []string{hc1.SelfLink, hc2.SelfLink}
c.MockRegionBackendServices.DeleteHook = mock.DeleteRegionBackendServicesErrHook
c.MockHealthChecks.DeleteHook = mock.DeleteHealthChecksInternalErrHook
gce.clearPreviousInternalResources(svc, loadBalancerName, backendSvc, "expectedBSName", "expectedHCName")
backendSvc, err = gce.GetRegionBackendService(svc.ObjectMeta.Name, gce.region)
assert.NoError(t, err)
assert.NotNil(t, backendSvc, "BackendService should not be deleted when api is mocked out.")
hc1, err = gce.GetHealthCheck("hc1")
assert.NoError(t, err)
assert.NotNil(t, hc1, "HealthCheck should not be deleted when there are more than one healthcheck attached.")
hc2, err = gce.GetHealthCheck("hc2")
assert.NoError(t, err)
assert.NotNil(t, hc2, "HealthCheck should not be deleted when there are more than one healthcheck attached.")
c.MockRegionBackendServices.DeleteHook = mock.DeleteRegionBackendServicesInUseErrHook
backendSvc.HealthChecks = []string{hc1.SelfLink}
gce.clearPreviousInternalResources(svc, loadBalancerName, backendSvc, "expectedBSName", "expectedHCName")
hc1, err = gce.GetHealthCheck("hc1")
assert.NoError(t, err)
assert.NotNil(t, hc1, "HealthCheck should not be deleted when api is mocked out.")
c.MockHealthChecks.DeleteHook = mock.DeleteHealthChecksInuseErrHook
gce.clearPreviousInternalResources(svc, loadBalancerName, backendSvc, "expectedBSName", "expectedHCName")
hc1, err = gce.GetHealthCheck("hc1")
assert.NoError(t, err)
assert.NotNil(t, hc1, "HealthCheck should not be deleted when api is mocked out.")
c.MockRegionBackendServices.DeleteHook = nil
c.MockHealthChecks.DeleteHook = nil
gce.clearPreviousInternalResources(svc, loadBalancerName, backendSvc, "expectedBSName", "expectedHCName")
backendSvc, err = gce.GetRegionBackendService(svc.ObjectMeta.Name, gce.region)
assert.Error(t, err)
assert.Nil(t, backendSvc, "BackendService should be deleted.")
hc1, err = gce.GetHealthCheck("hc1")
assert.Error(t, err)
assert.Nil(t, hc1, "HealthCheck should be deleted.")
}
func TestEnsureInternalFirewallDeletesLegacyFirewall(t *testing.T) {
gce, err := fakeGCECloud(DefaultTestClusterValues())
require.NoError(t, err)
vals := DefaultTestClusterValues()
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
fwName := MakeFirewallName(lbName)
c := gce.c.(*cloud.MockGCE)
c.MockFirewalls.InsertHook = nil
c.MockFirewalls.UpdateHook = nil
nodes, err := createAndInsertNodes(gce, []string{"test-node-1"}, vals.ZoneName)
require.NoError(t, err)
sourceRange := []string{"10.0.0.0/20"}
// Manually create a firewall rule with the legacy name - lbName
gce.ensureInternalFirewall(
svc,
lbName,
"firewall with legacy name",
sourceRange,
[]string{"123"},
v1.ProtocolTCP,
nodes,
"")
if err != nil {
t.Errorf("Unexpected error %v when ensuring legacy firewall %s for svc %+v", err, lbName, svc)
}
// Now ensure the firewall again with the correct name to simulate a sync after updating to new code.
err = gce.ensureInternalFirewall(
svc,
fwName,
"firewall with new name",
sourceRange,
[]string{"123", "456"},
v1.ProtocolTCP,
nodes,
lbName)
if err != nil {
t.Errorf("Unexpected error %v when ensuring firewall %s for svc %+v", err, fwName, svc)
}
existingFirewall, err := gce.GetFirewall(fwName)
require.Nil(t, err)
require.NotNil(t, existingFirewall)
// Existing firewall will not be deleted yet since this was the first sync with the new rule created.
existingLegacyFirewall, err := gce.GetFirewall(lbName)
require.Nil(t, err)
require.NotNil(t, existingLegacyFirewall)
// Now ensure the firewall again to simulate a second sync where the old rule will be deleted.
err = gce.ensureInternalFirewall(
svc,
fwName,
"firewall with new name",
sourceRange,
[]string{"123", "456", "789"},
v1.ProtocolTCP,
nodes,
lbName)
if err != nil {
t.Errorf("Unexpected error %v when ensuring firewall %s for svc %+v", err, fwName, svc)
}
existingFirewall, err = gce.GetFirewall(fwName)
require.Nil(t, err)
require.NotNil(t, existingFirewall)
existingLegacyFirewall, err = gce.GetFirewall(lbName)
require.NotNil(t, err)
require.Nil(t, existingLegacyFirewall)
}
func TestEnsureInternalFirewallSucceedsOnXPN(t *testing.T) {
gce, err := fakeGCECloud(DefaultTestClusterValues())
require.NoError(t, err)
vals := DefaultTestClusterValues()
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
lbName := gce.GetLoadBalancerName(context.TODO(), "", svc)
fwName := MakeFirewallName(lbName)
c := gce.c.(*cloud.MockGCE)
c.MockFirewalls.InsertHook = mock.InsertFirewallsUnauthorizedErrHook
c.MockFirewalls.UpdateHook = mock.UpdateFirewallsUnauthorizedErrHook
gce.onXPN = true
require.True(t, gce.OnXPN())
recorder := record.NewFakeRecorder(1024)
gce.eventRecorder = recorder
nodes, err := createAndInsertNodes(gce, []string{"test-node-1"}, vals.ZoneName)
require.NoError(t, err)
sourceRange := []string{"10.0.0.0/20"}
gce.ensureInternalFirewall(
svc,
fwName,
"A sad little firewall",
sourceRange,
[]string{"123"},
v1.ProtocolTCP,
nodes,
lbName)
require.Nil(t, err, "Should success when XPN is on.")
checkEvent(t, recorder, FilewallChangeMsg, true)
// Create a firewall.
c.MockFirewalls.InsertHook = nil
c.MockFirewalls.UpdateHook = nil
gce.onXPN = false
gce.ensureInternalFirewall(
svc,
fwName,
"A sad little firewall",
sourceRange,
[]string{"123"},
v1.ProtocolTCP,
nodes,
lbName)
require.Nil(t, err)
existingFirewall, err := gce.GetFirewall(fwName)
require.Nil(t, err)
require.NotNil(t, existingFirewall)
gce.onXPN = true
c.MockFirewalls.InsertHook = mock.InsertFirewallsUnauthorizedErrHook
c.MockFirewalls.UpdateHook = mock.UpdateFirewallsUnauthorizedErrHook
// Try to update the firewall just created.
gce.ensureInternalFirewall(
svc,
fwName,
"A happy little firewall",
sourceRange,
[]string{"123"},
v1.ProtocolTCP,
nodes,
lbName)
require.Nil(t, err, "Should success when XPN is on.")
checkEvent(t, recorder, FilewallChangeMsg, true)
}
func TestEnsureLoadBalancerDeletedSucceedsOnXPN(t *testing.T) {
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
c := gce.c.(*cloud.MockGCE)
recorder := record.NewFakeRecorder(1024)
gce.eventRecorder = recorder
require.NoError(t, err)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
_, err = createInternalLoadBalancer(gce, svc, nil, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
c.MockFirewalls.DeleteHook = mock.DeleteFirewallsUnauthorizedErrHook
gce.onXPN = true
err = gce.ensureInternalLoadBalancerDeleted(vals.ClusterName, vals.ClusterID, fakeLoadbalancerService(string(LBTypeInternal)))
assert.NoError(t, err)
checkEvent(t, recorder, FilewallChangeMsg, true)
}
func TestEnsureInternalInstanceGroupsDeleted(t *testing.T) {
vals := DefaultTestClusterValues()
gce, err := fakeGCECloud(vals)
c := gce.c.(*cloud.MockGCE)
recorder := record.NewFakeRecorder(1024)
gce.eventRecorder = recorder
require.NoError(t, err)
igName := makeInstanceGroupName(vals.ClusterID)
svc := fakeLoadbalancerService(string(LBTypeInternal))
svc, err = gce.client.CoreV1().Services(svc.Namespace).Create(context.TODO(), svc, metav1.CreateOptions{})
require.NoError(t, err)
_, err = createInternalLoadBalancer(gce, svc, nil, []string{"test-node-1"}, vals.ClusterName, vals.ClusterID, vals.ZoneName)
assert.NoError(t, err)
c.MockZones.ListHook = mock.ListZonesInternalErrHook
err = gce.ensureInternalLoadBalancerDeleted(igName, vals.ClusterID, svc)
assert.Error(t, err, mock.InternalServerError)
ig, err := gce.GetInstanceGroup(igName, vals.ZoneName)
assert.NoError(t, err)
assert.NotNil(t, ig)
c.MockZones.ListHook = nil
c.MockInstanceGroups.DeleteHook = mock.DeleteInstanceGroupInternalErrHook
err = gce.ensureInternalInstanceGroupsDeleted(igName)
assert.Error(t, err, mock.InternalServerError)
ig, err = gce.GetInstanceGroup(igName, vals.ZoneName)
assert.NoError(t, err)
assert.NotNil(t, ig)
c.MockInstanceGroups.DeleteHook = nil
err = gce.ensureInternalInstanceGroupsDeleted(igName)
assert.NoError(t, err)
ig, err = gce.GetInstanceGroup(igName, vals.ZoneName)
assert.Error(t, err)
assert.Nil(t, ig)
}
type EnsureILBParams struct {
clusterName string
clusterID string
service *v1.Service
existingFwdRule *compute.ForwardingRule
nodes []*v1.Node
}
// newEnsureILBParams is the constructor of EnsureILBParams.
func newEnsureILBParams(nodes []*v1.Node) *EnsureILBParams {
vals := DefaultTestClusterValues()
return &EnsureILBParams{
vals.ClusterName,
vals.ClusterID,
fakeLoadbalancerService(string(LBTypeInternal)),
nil,
nodes,
}
}
// TestEnsureInternalLoadBalancerErrors tests the function
// ensureInternalLoadBalancer, making sure the system won't panic when
// exceptions raised by gce.
func TestEnsureInternalLoadBalancerErrors(t *testing.T) {
vals := DefaultTestClusterValues()
var params *EnsureILBParams
for desc, tc := range map[string]struct {
adjustParams func(*EnsureILBParams)
injectMock func(*cloud.MockGCE)
}{
"Create internal instance groups failed": {
injectMock: func(c *cloud.MockGCE) {
c.MockInstanceGroups.GetHook = mock.GetInstanceGroupInternalErrHook
},
},
"Invalid existing forwarding rules given": {
adjustParams: func(params *EnsureILBParams) {
params.existingFwdRule = &compute.ForwardingRule{BackendService: "badBackendService"}
},
injectMock: func(c *cloud.MockGCE) {
c.MockRegionBackendServices.GetHook = mock.GetRegionBackendServicesErrHook
},
},
"EnsureInternalBackendService failed": {
injectMock: func(c *cloud.MockGCE) {
c.MockRegionBackendServices.GetHook = mock.GetRegionBackendServicesErrHook
},
},
"Create internal health check failed": {
injectMock: func(c *cloud.MockGCE) {
c.MockHealthChecks.GetHook = mock.GetHealthChecksInternalErrHook
},
},
"Create firewall failed": {
injectMock: func(c *cloud.MockGCE) {
c.MockFirewalls.InsertHook = mock.InsertFirewallsUnauthorizedErrHook
},
},
"Create region forwarding rule failed": {
injectMock: func(c *cloud.MockGCE) {
c.MockForwardingRules.InsertHook = mock.InsertForwardingRulesInternalErrHook
},
},
"Get region forwarding rule failed": {
injectMock: func(c *cloud.MockGCE) {
c.MockForwardingRules.GetHook = mock.GetForwardingRulesInternalErrHook
},
},
"Delete region forwarding rule failed": {
adjustParams: func(params *EnsureILBParams) {
params.existingFwdRule = &compute.ForwardingRule{BackendService: "badBackendService"}
},
injectMock: func(c *cloud.MockGCE) {
c.MockForwardingRules.DeleteHook = mock.DeleteForwardingRuleErrHook
},
},
} {
t.Run(desc, func(t *testing.T) {
gce, err := fakeGCECloud(DefaultTestClusterValues())
require.NoError(t, err)
nodes, err := createAndInsertNodes(gce, []string{"test-node-1"}, vals.ZoneName)
require.NoError(t, err)
params = newEnsureILBParams(nodes)
if tc.adjustParams != nil {
tc.adjustParams(params)
}
if tc.injectMock != nil {
tc.injectMock(gce.c.(*cloud.MockGCE))
}
_, err = gce.client.CoreV1().Services(params.service.Namespace).Create(context.TODO(), params.service, metav1.CreateOptions{})
require.NoError(t, err)
status, err := gce.ensureInternalLoadBalancer(
params.clusterName,
params.clusterID,
params.service,
params.existingFwdRule,
params.nodes,
)
assert.Error(t, err, "Should return an error when "+desc)
assert.Nil(t, status, "Should not return a status when "+desc)
})
}
}
func TestMergeHealthChecks(t *testing.T) {
t.Parallel()
for _, tc := range []struct {
desc string
checkIntervalSec int64
timeoutSec int64
healthyThreshold int64
unhealthyThreshold int64
wantCheckIntervalSec int64
wantTimeoutSec int64
wantHealthyThreshold int64
wantUnhealthyThreshold int64
}{
{"unchanged", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"interval - too small - should reconcile", gceHcCheckIntervalSeconds - 1, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"timeout - too small - should reconcile", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds - 1, gceHcHealthyThreshold, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"healthy threshold - too small - should reconcile", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold - 1, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"unhealthy threshold - too small - should reconcile", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold - 1, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"interval - user configured - should keep", gceHcCheckIntervalSeconds + 1, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds + 1, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"timeout - user configured - should keep", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds + 1, gceHcHealthyThreshold, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds + 1, gceHcHealthyThreshold, gceHcUnhealthyThreshold},
{"healthy threshold - user configured - should keep", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold + 1, gceHcUnhealthyThreshold, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold + 1, gceHcUnhealthyThreshold},
{"unhealthy threshold - user configured - should keep", gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold + 1, gceHcCheckIntervalSeconds, gceHcTimeoutSeconds, gceHcHealthyThreshold, gceHcUnhealthyThreshold + 1},
} {
t.Run(tc.desc, func(t *testing.T) {
wantHC := newInternalLBHealthCheck("hc", types.NamespacedName{Name: "svc", Namespace: "default"}, false, "/", 12345)
hc := &compute.HealthCheck{
CheckIntervalSec: tc.checkIntervalSec,
TimeoutSec: tc.timeoutSec,
HealthyThreshold: tc.healthyThreshold,
UnhealthyThreshold: tc.unhealthyThreshold,
}
mergeHealthChecks(hc, wantHC)
if wantHC.CheckIntervalSec != tc.wantCheckIntervalSec {
t.Errorf("wantHC.CheckIntervalSec = %d; want %d", wantHC.CheckIntervalSec, tc.checkIntervalSec)
}
if wantHC.TimeoutSec != tc.wantTimeoutSec {
t.Errorf("wantHC.TimeoutSec = %d; want %d", wantHC.TimeoutSec, tc.timeoutSec)
}
if wantHC.HealthyThreshold != tc.wantHealthyThreshold {
t.Errorf("wantHC.HealthyThreshold = %d; want %d", wantHC.HealthyThreshold, tc.healthyThreshold)
}
if wantHC.UnhealthyThreshold != tc.wantUnhealthyThreshold {
t.Errorf("wantHC.UnhealthyThreshold = %d; want %d", wantHC.UnhealthyThreshold, tc.unhealthyThreshold)
}