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service_util.go
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service_util.go
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/*
Copyright 2016 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 framework
import (
"bytes"
"fmt"
"net"
"sort"
"strconv"
"strings"
"time"
v1 "k8s.io/api/core/v1"
policyv1beta1 "k8s.io/api/policy/v1beta1"
"k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/intstr"
utilnet "k8s.io/apimachinery/pkg/util/net"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/uuid"
"k8s.io/apimachinery/pkg/util/wait"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/util/retry"
api "k8s.io/kubernetes/pkg/apis/core"
"k8s.io/kubernetes/pkg/client/clientset_generated/internalclientset"
"k8s.io/kubernetes/pkg/registry/core/service/portallocator"
testutils "k8s.io/kubernetes/test/utils"
imageutils "k8s.io/kubernetes/test/utils/image"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
const (
// KubeProxyLagTimeout is the maximum time a kube-proxy daemon on a node is allowed
// to not notice a Service update, such as type=NodePort.
// TODO: This timeout should be O(10s), observed values are O(1m), 5m is very
// liberal. Fix tracked in #20567.
KubeProxyLagTimeout = 5 * time.Minute
// KubeProxyEndpointLagTimeout is the maximum time a kube-proxy daemon on a node is allowed
// to not notice an Endpoint update.
KubeProxyEndpointLagTimeout = 30 * time.Second
// LoadBalancerLagTimeoutDefault is the maximum time a load balancer is allowed to
// not respond after creation.
LoadBalancerLagTimeoutDefault = 2 * time.Minute
// LoadBalancerLagTimeoutAWS is the delay between ELB creation and serving traffic
// on AWS. A few minutes is typical, so use 10m.
LoadBalancerLagTimeoutAWS = 10 * time.Minute
// How long to wait for a load balancer to be created/modified.
//TODO: once support ticket 21807001 is resolved, reduce this timeout back to something reasonable
LoadBalancerCreateTimeoutDefault = 20 * time.Minute
LoadBalancerCreateTimeoutLarge = 2 * time.Hour
// Time required by the loadbalancer to cleanup, proportional to numApps/Ing.
// Bring the cleanup timeout back down to 5m once b/33588344 is resolved.
LoadBalancerCleanupTimeout = 15 * time.Minute
// On average it takes ~6 minutes for a single backend to come online in GCE.
LoadBalancerPollTimeout = 15 * time.Minute
LoadBalancerPollInterval = 30 * time.Second
LargeClusterMinNodesNumber = 100
// Don't test with more than 3 nodes.
// Many tests create an endpoint per node, in large clusters, this is
// resource and time intensive.
MaxNodesForEndpointsTests = 3
// ServiceTestTimeout is used for most polling/waiting activities
ServiceTestTimeout = 60 * time.Second
// GCPMaxInstancesInInstanceGroup is the maximum number of instances supported in
// one instance group on GCP.
GCPMaxInstancesInInstanceGroup = 2000
// AffinityConfirmCount is the number of needed continuous requests to confirm that
// affinity is enabled.
AffinityConfirmCount = 15
)
// This should match whatever the default/configured range is
var ServiceNodePortRange = utilnet.PortRange{Base: 30000, Size: 2768}
// A test jig to help service testing.
type ServiceTestJig struct {
ID string
Name string
Client clientset.Interface
Labels map[string]string
}
// PodNode is a pod-node pair indicating which node a given pod is running on
type PodNode struct {
// Pod represents pod name
Pod string
// Node represents node name
Node string
}
// NewServiceTestJig allocates and inits a new ServiceTestJig.
func NewServiceTestJig(client clientset.Interface, name string) *ServiceTestJig {
j := &ServiceTestJig{}
j.Client = client
j.Name = name
j.ID = j.Name + "-" + string(uuid.NewUUID())
j.Labels = map[string]string{"testid": j.ID}
return j
}
// newServiceTemplate returns the default v1.Service template for this jig, but
// does not actually create the Service. The default Service has the same name
// as the jig and exposes the given port.
func (j *ServiceTestJig) newServiceTemplate(namespace string, proto v1.Protocol, port int32) *v1.Service {
service := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: j.Name,
Labels: j.Labels,
},
Spec: v1.ServiceSpec{
Selector: j.Labels,
Ports: []v1.ServicePort{
{
Protocol: proto,
Port: port,
},
},
},
}
return service
}
// CreateTCPServiceWithPort creates a new TCP Service with given port based on the
// jig's defaults. Callers can provide a function to tweak the Service object before
// it is created.
func (j *ServiceTestJig) CreateTCPServiceWithPort(namespace string, tweak func(svc *v1.Service), port int32) *v1.Service {
svc := j.newServiceTemplate(namespace, v1.ProtocolTCP, port)
if tweak != nil {
tweak(svc)
}
result, err := j.Client.CoreV1().Services(namespace).Create(svc)
if err != nil {
Failf("Failed to create TCP Service %q: %v", svc.Name, err)
}
return result
}
// CreateTCPServiceOrFail creates a new TCP Service based on the jig's
// defaults. Callers can provide a function to tweak the Service object before
// it is created.
func (j *ServiceTestJig) CreateTCPServiceOrFail(namespace string, tweak func(svc *v1.Service)) *v1.Service {
svc := j.newServiceTemplate(namespace, v1.ProtocolTCP, 80)
if tweak != nil {
tweak(svc)
}
result, err := j.Client.CoreV1().Services(namespace).Create(svc)
if err != nil {
Failf("Failed to create TCP Service %q: %v", svc.Name, err)
}
return result
}
// CreateUDPServiceOrFail creates a new UDP Service based on the jig's
// defaults. Callers can provide a function to tweak the Service object before
// it is created.
func (j *ServiceTestJig) CreateUDPServiceOrFail(namespace string, tweak func(svc *v1.Service)) *v1.Service {
svc := j.newServiceTemplate(namespace, v1.ProtocolUDP, 80)
if tweak != nil {
tweak(svc)
}
result, err := j.Client.CoreV1().Services(namespace).Create(svc)
if err != nil {
Failf("Failed to create UDP Service %q: %v", svc.Name, err)
}
return result
}
// CreateExternalNameServiceOrFail creates a new ExternalName type Service based on the jig's defaults.
// Callers can provide a function to tweak the Service object before it is created.
func (j *ServiceTestJig) CreateExternalNameServiceOrFail(namespace string, tweak func(svc *v1.Service)) *v1.Service {
svc := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: j.Name,
Labels: j.Labels,
},
Spec: v1.ServiceSpec{
Selector: j.Labels,
ExternalName: "foo.example.com",
Type: v1.ServiceTypeExternalName,
},
}
if tweak != nil {
tweak(svc)
}
result, err := j.Client.CoreV1().Services(namespace).Create(svc)
if err != nil {
Failf("Failed to create ExternalName Service %q: %v", svc.Name, err)
}
return result
}
// CreateServiceWithServicePort creates a new Service with ServicePort.
func (j *ServiceTestJig) CreateServiceWithServicePort(labels map[string]string, namespace string, ports []v1.ServicePort) (*v1.Service, error) {
service := &v1.Service{
ObjectMeta: metav1.ObjectMeta{
Name: j.Name,
},
Spec: v1.ServiceSpec{
Selector: labels,
Ports: ports,
},
}
return j.Client.CoreV1().Services(namespace).Create(service)
}
func (j *ServiceTestJig) ChangeServiceType(namespace, name string, newType v1.ServiceType, timeout time.Duration) {
ingressIP := ""
svc := j.UpdateServiceOrFail(namespace, name, func(s *v1.Service) {
for _, ing := range s.Status.LoadBalancer.Ingress {
if ing.IP != "" {
ingressIP = ing.IP
}
}
s.Spec.Type = newType
s.Spec.Ports[0].NodePort = 0
})
if ingressIP != "" {
j.WaitForLoadBalancerDestroyOrFail(namespace, svc.Name, ingressIP, int(svc.Spec.Ports[0].Port), timeout)
}
}
// CreateOnlyLocalNodePortService creates a NodePort service with
// ExternalTrafficPolicy set to Local and sanity checks its nodePort.
// If createPod is true, it also creates an RC with 1 replica of
// the standard netexec container used everywhere in this test.
func (j *ServiceTestJig) CreateOnlyLocalNodePortService(namespace, serviceName string, createPod bool) *v1.Service {
By("creating a service " + namespace + "/" + serviceName + " with type=NodePort and ExternalTrafficPolicy=Local")
svc := j.CreateTCPServiceOrFail(namespace, func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeNodePort
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
svc.Spec.Ports = []v1.ServicePort{{Protocol: v1.ProtocolTCP, Port: 80}}
})
if createPod {
By("creating a pod to be part of the service " + serviceName)
j.RunOrFail(namespace, nil)
}
j.SanityCheckService(svc, v1.ServiceTypeNodePort)
return svc
}
// CreateOnlyLocalLoadBalancerService creates a loadbalancer service with
// ExternalTrafficPolicy set to Local and waits for it to acquire an ingress IP.
// If createPod is true, it also creates an RC with 1 replica of
// the standard netexec container used everywhere in this test.
func (j *ServiceTestJig) CreateOnlyLocalLoadBalancerService(namespace, serviceName string, timeout time.Duration, createPod bool,
tweak func(svc *v1.Service)) *v1.Service {
By("creating a service " + namespace + "/" + serviceName + " with type=LoadBalancer and ExternalTrafficPolicy=Local")
svc := j.CreateTCPServiceOrFail(namespace, func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeLoadBalancer
// We need to turn affinity off for our LB distribution tests
svc.Spec.SessionAffinity = v1.ServiceAffinityNone
svc.Spec.ExternalTrafficPolicy = v1.ServiceExternalTrafficPolicyTypeLocal
if tweak != nil {
tweak(svc)
}
})
if createPod {
By("creating a pod to be part of the service " + serviceName)
j.RunOrFail(namespace, nil)
}
By("waiting for loadbalancer for service " + namespace + "/" + serviceName)
svc = j.WaitForLoadBalancerOrFail(namespace, serviceName, timeout)
j.SanityCheckService(svc, v1.ServiceTypeLoadBalancer)
return svc
}
// CreateLoadBalancerService creates a loadbalancer service and waits
// for it to acquire an ingress IP.
func (j *ServiceTestJig) CreateLoadBalancerService(namespace, serviceName string, timeout time.Duration, tweak func(svc *v1.Service)) *v1.Service {
By("creating a service " + namespace + "/" + serviceName + " with type=LoadBalancer")
svc := j.CreateTCPServiceOrFail(namespace, func(svc *v1.Service) {
svc.Spec.Type = v1.ServiceTypeLoadBalancer
// We need to turn affinity off for our LB distribution tests
svc.Spec.SessionAffinity = v1.ServiceAffinityNone
if tweak != nil {
tweak(svc)
}
})
By("waiting for loadbalancer for service " + namespace + "/" + serviceName)
svc = j.WaitForLoadBalancerOrFail(namespace, serviceName, timeout)
j.SanityCheckService(svc, v1.ServiceTypeLoadBalancer)
return svc
}
func GetNodeAddresses(node *v1.Node, addressType v1.NodeAddressType) (ips []string) {
for j := range node.Status.Addresses {
nodeAddress := &node.Status.Addresses[j]
if nodeAddress.Type == addressType {
ips = append(ips, nodeAddress.Address)
}
}
return
}
func CollectAddresses(nodes *v1.NodeList, addressType v1.NodeAddressType) []string {
ips := []string{}
for i := range nodes.Items {
ips = append(ips, GetNodeAddresses(&nodes.Items[i], addressType)...)
}
return ips
}
func GetNodePublicIps(c clientset.Interface) ([]string, error) {
nodes := GetReadySchedulableNodesOrDie(c)
ips := CollectAddresses(nodes, v1.NodeExternalIP)
if len(ips) == 0 {
// If ExternalIP isn't set, assume the test programs can reach the InternalIP
ips = CollectAddresses(nodes, v1.NodeInternalIP)
}
return ips, nil
}
func PickNodeIP(c clientset.Interface) string {
publicIps, err := GetNodePublicIps(c)
Expect(err).NotTo(HaveOccurred())
if len(publicIps) == 0 {
Failf("got unexpected number (%d) of public IPs", len(publicIps))
}
ip := publicIps[0]
return ip
}
// PodNodePairs return PodNode pairs for all pods in a namespace
func PodNodePairs(c clientset.Interface, ns string) ([]PodNode, error) {
var result []PodNode
podList, err := c.CoreV1().Pods(ns).List(metav1.ListOptions{})
if err != nil {
return result, err
}
for _, pod := range podList.Items {
result = append(result, PodNode{
Pod: pod.Name,
Node: pod.Spec.NodeName,
})
}
return result, nil
}
// GetEndpointNodes returns a map of nodenames:external-ip on which the
// endpoints of the given Service are running.
func (j *ServiceTestJig) GetEndpointNodes(svc *v1.Service) map[string][]string {
nodes := j.GetNodes(MaxNodesForEndpointsTests)
endpoints, err := j.Client.CoreV1().Endpoints(svc.Namespace).Get(svc.Name, metav1.GetOptions{})
if err != nil {
Failf("Get endpoints for service %s/%s failed (%s)", svc.Namespace, svc.Name, err)
}
if len(endpoints.Subsets) == 0 {
Failf("Endpoint has no subsets, cannot determine node addresses.")
}
epNodes := sets.NewString()
for _, ss := range endpoints.Subsets {
for _, e := range ss.Addresses {
if e.NodeName != nil {
epNodes.Insert(*e.NodeName)
}
}
}
nodeMap := map[string][]string{}
for _, n := range nodes.Items {
if epNodes.Has(n.Name) {
nodeMap[n.Name] = GetNodeAddresses(&n, v1.NodeExternalIP)
}
}
return nodeMap
}
// getNodes returns the first maxNodesForTest nodes. Useful in large clusters
// where we don't eg: want to create an endpoint per node.
func (j *ServiceTestJig) GetNodes(maxNodesForTest int) (nodes *v1.NodeList) {
nodes = GetReadySchedulableNodesOrDie(j.Client)
if len(nodes.Items) <= maxNodesForTest {
maxNodesForTest = len(nodes.Items)
}
nodes.Items = nodes.Items[:maxNodesForTest]
return nodes
}
func (j *ServiceTestJig) GetNodesNames(maxNodesForTest int) []string {
nodes := j.GetNodes(maxNodesForTest)
nodesNames := []string{}
for _, node := range nodes.Items {
nodesNames = append(nodesNames, node.Name)
}
return nodesNames
}
func (j *ServiceTestJig) WaitForEndpointOnNode(namespace, serviceName, nodeName string) {
err := wait.PollImmediate(Poll, LoadBalancerCreateTimeoutDefault, func() (bool, error) {
endpoints, err := j.Client.CoreV1().Endpoints(namespace).Get(serviceName, metav1.GetOptions{})
if err != nil {
Logf("Get endpoints for service %s/%s failed (%s)", namespace, serviceName, err)
return false, nil
}
if len(endpoints.Subsets) == 0 {
Logf("Expect endpoints with subsets, got none.")
return false, nil
}
// TODO: Handle multiple endpoints
if len(endpoints.Subsets[0].Addresses) == 0 {
Logf("Expected Ready endpoints - found none")
return false, nil
}
epHostName := *endpoints.Subsets[0].Addresses[0].NodeName
Logf("Pod for service %s/%s is on node %s", namespace, serviceName, epHostName)
if epHostName != nodeName {
Logf("Found endpoint on wrong node, expected %v, got %v", nodeName, epHostName)
return false, nil
}
return true, nil
})
ExpectNoError(err)
}
func (j *ServiceTestJig) SanityCheckService(svc *v1.Service, svcType v1.ServiceType) {
if svc.Spec.Type != svcType {
Failf("unexpected Spec.Type (%s) for service, expected %s", svc.Spec.Type, svcType)
}
if svcType != v1.ServiceTypeExternalName {
if svc.Spec.ExternalName != "" {
Failf("unexpected Spec.ExternalName (%s) for service, expected empty", svc.Spec.ExternalName)
}
if svc.Spec.ClusterIP != api.ClusterIPNone && svc.Spec.ClusterIP == "" {
Failf("didn't get ClusterIP for non-ExternamName service")
}
} else {
if svc.Spec.ClusterIP != "" {
Failf("unexpected Spec.ClusterIP (%s) for ExternamName service, expected empty", svc.Spec.ClusterIP)
}
}
expectNodePorts := false
if svcType != v1.ServiceTypeClusterIP && svcType != v1.ServiceTypeExternalName {
expectNodePorts = true
}
for i, port := range svc.Spec.Ports {
hasNodePort := (port.NodePort != 0)
if hasNodePort != expectNodePorts {
Failf("unexpected Spec.Ports[%d].NodePort (%d) for service", i, port.NodePort)
}
if hasNodePort {
if !ServiceNodePortRange.Contains(int(port.NodePort)) {
Failf("out-of-range nodePort (%d) for service", port.NodePort)
}
}
}
expectIngress := false
if svcType == v1.ServiceTypeLoadBalancer {
expectIngress = true
}
hasIngress := len(svc.Status.LoadBalancer.Ingress) != 0
if hasIngress != expectIngress {
Failf("unexpected number of Status.LoadBalancer.Ingress (%d) for service", len(svc.Status.LoadBalancer.Ingress))
}
if hasIngress {
for i, ing := range svc.Status.LoadBalancer.Ingress {
if ing.IP == "" && ing.Hostname == "" {
Failf("unexpected Status.LoadBalancer.Ingress[%d] for service: %#v", i, ing)
}
}
}
}
// UpdateService fetches a service, calls the update function on it, and
// then attempts to send the updated service. It tries up to 3 times in the
// face of timeouts and conflicts.
func (j *ServiceTestJig) UpdateService(namespace, name string, update func(*v1.Service)) (*v1.Service, error) {
for i := 0; i < 3; i++ {
service, err := j.Client.CoreV1().Services(namespace).Get(name, metav1.GetOptions{})
if err != nil {
return nil, fmt.Errorf("Failed to get Service %q: %v", name, err)
}
update(service)
service, err = j.Client.CoreV1().Services(namespace).Update(service)
if err == nil {
return service, nil
}
if !errors.IsConflict(err) && !errors.IsServerTimeout(err) {
return nil, fmt.Errorf("Failed to update Service %q: %v", name, err)
}
}
return nil, fmt.Errorf("Too many retries updating Service %q", name)
}
// UpdateServiceOrFail fetches a service, calls the update function on it, and
// then attempts to send the updated service. It tries up to 3 times in the
// face of timeouts and conflicts.
func (j *ServiceTestJig) UpdateServiceOrFail(namespace, name string, update func(*v1.Service)) *v1.Service {
svc, err := j.UpdateService(namespace, name, update)
if err != nil {
Failf(err.Error())
}
return svc
}
func (j *ServiceTestJig) WaitForNewIngressIPOrFail(namespace, name, existingIP string, timeout time.Duration) *v1.Service {
Logf("Waiting up to %v for service %q to get a new ingress IP", timeout, name)
service := j.waitForConditionOrFail(namespace, name, timeout, "have a new ingress IP", func(svc *v1.Service) bool {
if len(svc.Status.LoadBalancer.Ingress) == 0 {
return false
}
ip := svc.Status.LoadBalancer.Ingress[0].IP
if ip == "" || ip == existingIP {
return false
}
return true
})
return service
}
func (j *ServiceTestJig) ChangeServiceNodePortOrFail(namespace, name string, initial int) *v1.Service {
var err error
var service *v1.Service
for i := 1; i < ServiceNodePortRange.Size; i++ {
offs1 := initial - ServiceNodePortRange.Base
offs2 := (offs1 + i) % ServiceNodePortRange.Size
newPort := ServiceNodePortRange.Base + offs2
service, err = j.UpdateService(namespace, name, func(s *v1.Service) {
s.Spec.Ports[0].NodePort = int32(newPort)
})
if err != nil && strings.Contains(err.Error(), portallocator.ErrAllocated.Error()) {
Logf("tried nodePort %d, but it is in use, will try another", newPort)
continue
}
// Otherwise err was nil or err was a real error
break
}
if err != nil {
Failf("Could not change the nodePort: %v", err)
}
return service
}
func (j *ServiceTestJig) WaitForLoadBalancerOrFail(namespace, name string, timeout time.Duration) *v1.Service {
Logf("Waiting up to %v for service %q to have a LoadBalancer", timeout, name)
service := j.waitForConditionOrFail(namespace, name, timeout, "have a load balancer", func(svc *v1.Service) bool {
if len(svc.Status.LoadBalancer.Ingress) > 0 {
return true
}
return false
})
return service
}
func (j *ServiceTestJig) WaitForLoadBalancerDestroyOrFail(namespace, name string, ip string, port int, timeout time.Duration) *v1.Service {
// TODO: once support ticket 21807001 is resolved, reduce this timeout back to something reasonable
defer func() {
if err := EnsureLoadBalancerResourcesDeleted(ip, strconv.Itoa(port)); err != nil {
Logf("Failed to delete cloud resources for service: %s %d (%v)", ip, port, err)
}
}()
Logf("Waiting up to %v for service %q to have no LoadBalancer", timeout, name)
service := j.waitForConditionOrFail(namespace, name, timeout, "have no load balancer", func(svc *v1.Service) bool {
if len(svc.Status.LoadBalancer.Ingress) == 0 {
return true
}
return false
})
return service
}
func (j *ServiceTestJig) waitForConditionOrFail(namespace, name string, timeout time.Duration, message string, conditionFn func(*v1.Service) bool) *v1.Service {
var service *v1.Service
pollFunc := func() (bool, error) {
svc, err := j.Client.CoreV1().Services(namespace).Get(name, metav1.GetOptions{})
if err != nil {
return false, err
}
if conditionFn(svc) {
service = svc
return true, nil
}
return false, nil
}
if err := wait.PollImmediate(Poll, timeout, pollFunc); err != nil {
Failf("Timed out waiting for service %q to %s", name, message)
}
return service
}
// newRCTemplate returns the default v1.ReplicationController object for
// this jig, but does not actually create the RC. The default RC has the same
// name as the jig and runs the "netexec" container.
func (j *ServiceTestJig) newRCTemplate(namespace string) *v1.ReplicationController {
var replicas int32 = 1
rc := &v1.ReplicationController{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: j.Name,
Labels: j.Labels,
},
Spec: v1.ReplicationControllerSpec{
Replicas: &replicas,
Selector: j.Labels,
Template: &v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: j.Labels,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "netexec",
Image: imageutils.GetE2EImage(imageutils.Netexec),
Args: []string{"--http-port=80", "--udp-port=80"},
ReadinessProbe: &v1.Probe{
PeriodSeconds: 3,
Handler: v1.Handler{
HTTPGet: &v1.HTTPGetAction{
Port: intstr.FromInt(80),
Path: "/hostName",
},
},
},
},
},
TerminationGracePeriodSeconds: new(int64),
},
},
},
}
return rc
}
func (j *ServiceTestJig) AddRCAntiAffinity(rc *v1.ReplicationController) {
var replicas int32 = 2
rc.Spec.Replicas = &replicas
if rc.Spec.Template.Spec.Affinity == nil {
rc.Spec.Template.Spec.Affinity = &v1.Affinity{}
}
if rc.Spec.Template.Spec.Affinity.PodAntiAffinity == nil {
rc.Spec.Template.Spec.Affinity.PodAntiAffinity = &v1.PodAntiAffinity{}
}
rc.Spec.Template.Spec.Affinity.PodAntiAffinity.RequiredDuringSchedulingIgnoredDuringExecution = append(
rc.Spec.Template.Spec.Affinity.PodAntiAffinity.RequiredDuringSchedulingIgnoredDuringExecution,
v1.PodAffinityTerm{
LabelSelector: &metav1.LabelSelector{MatchLabels: j.Labels},
Namespaces: nil,
TopologyKey: "kubernetes.io/hostname",
})
}
func (j *ServiceTestJig) CreatePDBOrFail(namespace string, rc *v1.ReplicationController) *policyv1beta1.PodDisruptionBudget {
pdb := j.newPDBTemplate(namespace, rc)
newPdb, err := j.Client.PolicyV1beta1().PodDisruptionBudgets(namespace).Create(pdb)
if err != nil {
Failf("Failed to create PDB %q %v", pdb.Name, err)
}
if err := j.waitForPdbReady(namespace); err != nil {
Failf("Failed waiting for PDB to be ready: %v", err)
}
return newPdb
}
// newPDBTemplate returns the default policyv1beta1.PodDisruptionBudget object for
// this jig, but does not actually create the PDB. The default PDB specifies a
// MinAvailable of N-1 and matches the pods created by the RC.
func (j *ServiceTestJig) newPDBTemplate(namespace string, rc *v1.ReplicationController) *policyv1beta1.PodDisruptionBudget {
minAvailable := intstr.FromInt(int(*rc.Spec.Replicas) - 1)
pdb := &policyv1beta1.PodDisruptionBudget{
ObjectMeta: metav1.ObjectMeta{
Namespace: namespace,
Name: j.Name,
Labels: j.Labels,
},
Spec: policyv1beta1.PodDisruptionBudgetSpec{
MinAvailable: &minAvailable,
Selector: &metav1.LabelSelector{MatchLabels: j.Labels},
},
}
return pdb
}
// RunOrFail creates a ReplicationController and Pod(s) and waits for the
// Pod(s) to be running. Callers can provide a function to tweak the RC object
// before it is created.
func (j *ServiceTestJig) RunOrFail(namespace string, tweak func(rc *v1.ReplicationController)) *v1.ReplicationController {
rc := j.newRCTemplate(namespace)
if tweak != nil {
tweak(rc)
}
result, err := j.Client.CoreV1().ReplicationControllers(namespace).Create(rc)
if err != nil {
Failf("Failed to create RC %q: %v", rc.Name, err)
}
pods, err := j.waitForPodsCreated(namespace, int(*(rc.Spec.Replicas)))
if err != nil {
Failf("Failed to create pods: %v", err)
}
if err := j.waitForPodsReady(namespace, pods); err != nil {
Failf("Failed waiting for pods to be running: %v", err)
}
return result
}
func (j *ServiceTestJig) waitForPdbReady(namespace string) error {
timeout := 2 * time.Minute
for start := time.Now(); time.Since(start) < timeout; time.Sleep(2 * time.Second) {
pdb, err := j.Client.PolicyV1beta1().PodDisruptionBudgets(namespace).Get(j.Name, metav1.GetOptions{})
if err != nil {
return err
}
if pdb.Status.PodDisruptionsAllowed > 0 {
return nil
}
}
return fmt.Errorf("Timeout waiting for PDB %q to be ready", j.Name)
}
func (j *ServiceTestJig) waitForPodsCreated(namespace string, replicas int) ([]string, error) {
timeout := 2 * time.Minute
// List the pods, making sure we observe all the replicas.
label := labels.SelectorFromSet(labels.Set(j.Labels))
Logf("Waiting up to %v for %d pods to be created", timeout, replicas)
for start := time.Now(); time.Since(start) < timeout; time.Sleep(2 * time.Second) {
options := metav1.ListOptions{LabelSelector: label.String()}
pods, err := j.Client.CoreV1().Pods(namespace).List(options)
if err != nil {
return nil, err
}
found := []string{}
for _, pod := range pods.Items {
if pod.DeletionTimestamp != nil {
continue
}
found = append(found, pod.Name)
}
if len(found) == replicas {
Logf("Found all %d pods", replicas)
return found, nil
}
Logf("Found %d/%d pods - will retry", len(found), replicas)
}
return nil, fmt.Errorf("Timeout waiting for %d pods to be created", replicas)
}
func (j *ServiceTestJig) waitForPodsReady(namespace string, pods []string) error {
timeout := 2 * time.Minute
if !CheckPodsRunningReady(j.Client, namespace, pods, timeout) {
return fmt.Errorf("Timeout waiting for %d pods to be ready", len(pods))
}
return nil
}
// newNetexecPodSpec returns the pod spec of netexec pod
func newNetexecPodSpec(podName string, httpPort, udpPort int32, hostNetwork bool) *v1.Pod {
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "netexec",
Image: NetexecImageName,
Command: []string{
"/netexec",
fmt.Sprintf("--http-port=%d", httpPort),
fmt.Sprintf("--udp-port=%d", udpPort),
},
Ports: []v1.ContainerPort{
{
Name: "http",
ContainerPort: httpPort,
},
{
Name: "udp",
ContainerPort: udpPort,
},
},
},
},
HostNetwork: hostNetwork,
},
}
return pod
}
func (j *ServiceTestJig) LaunchNetexecPodOnNode(f *Framework, nodeName, podName string, httpPort, udpPort int32, hostNetwork bool) {
Logf("Creating netexec pod %q on node %v in namespace %q", podName, nodeName, f.Namespace.Name)
pod := newNetexecPodSpec(podName, httpPort, udpPort, hostNetwork)
pod.Spec.NodeName = nodeName
pod.ObjectMeta.Labels = j.Labels
podClient := f.ClientSet.CoreV1().Pods(f.Namespace.Name)
_, err := podClient.Create(pod)
ExpectNoError(err)
ExpectNoError(f.WaitForPodRunning(podName))
Logf("Netexec pod %q in namespace %q running", pod.Name, f.Namespace.Name)
}
// newEchoServerPodSpec returns the pod spec of echo server pod
func newEchoServerPodSpec(podName string) *v1.Pod {
port := 8080
pod := &v1.Pod{
ObjectMeta: metav1.ObjectMeta{
Name: podName,
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: "echoserver",
Image: imageutils.GetE2EImage(imageutils.EchoServer),
Ports: []v1.ContainerPort{{ContainerPort: int32(port)}},
},
},
RestartPolicy: v1.RestartPolicyNever,
},
}
return pod
}
// LaunchEchoserverPodOnNode launches a pod serving http on port 8080 to act
// as the target for source IP preservation test. The client's source ip would
// be echoed back by the web server.
func (j *ServiceTestJig) LaunchEchoserverPodOnNode(f *Framework, nodeName, podName string) {
Logf("Creating echo server pod %q in namespace %q", podName, f.Namespace.Name)
pod := newEchoServerPodSpec(podName)
pod.Spec.NodeName = nodeName
pod.ObjectMeta.Labels = j.Labels
podClient := f.ClientSet.CoreV1().Pods(f.Namespace.Name)
_, err := podClient.Create(pod)
ExpectNoError(err)
ExpectNoError(f.WaitForPodRunning(podName))
Logf("Echo server pod %q in namespace %q running", pod.Name, f.Namespace.Name)
}
func (j *ServiceTestJig) TestReachableHTTP(host string, port int, timeout time.Duration) {
j.TestReachableHTTPWithRetriableErrorCodes(host, port, []int{}, timeout)
}
func (j *ServiceTestJig) TestReachableHTTPWithRetriableErrorCodes(host string, port int, retriableErrCodes []int, timeout time.Duration) {
if err := wait.PollImmediate(Poll, timeout, func() (bool, error) {
return TestReachableHTTPWithRetriableErrorCodes(host, port, "/echo?msg=hello", "hello", retriableErrCodes)
}); err != nil {
if err == wait.ErrWaitTimeout {
Failf("Could not reach HTTP service through %v:%v after %v", host, port, timeout)
} else {
Failf("Failed to reach HTTP service through %v:%v: %v", host, port, err)
}
}
}
func (j *ServiceTestJig) TestNotReachableHTTP(host string, port int, timeout time.Duration) {
if err := wait.PollImmediate(Poll, timeout, func() (bool, error) { return TestNotReachableHTTP(host, port) }); err != nil {
Failf("Could still reach HTTP service through %v:%v after %v: %v", host, port, timeout, err)
}
}
func (j *ServiceTestJig) TestReachableUDP(host string, port int, timeout time.Duration) {
if err := wait.PollImmediate(Poll, timeout, func() (bool, error) { return TestReachableUDP(host, port, "echo hello", "hello") }); err != nil {
Failf("Could not reach UDP service through %v:%v after %v: %v", host, port, timeout, err)
}
}
func (j *ServiceTestJig) TestNotReachableUDP(host string, port int, timeout time.Duration) {
if err := wait.PollImmediate(Poll, timeout, func() (bool, error) { return TestNotReachableUDP(host, port, "echo hello") }); err != nil {
Failf("Could still reach UDP service through %v:%v after %v: %v", host, port, timeout, err)
}
}
func (j *ServiceTestJig) GetHTTPContent(host string, port int, timeout time.Duration, url string) bytes.Buffer {
var body bytes.Buffer
var err error
if pollErr := wait.PollImmediate(Poll, timeout, func() (bool, error) {
var result bool
result, err = TestReachableHTTPWithContent(host, port, url, "", &body)
if err != nil {
Logf("Error hitting %v:%v%v, retrying: %v", host, port, url, err)
return false, nil
}
return result, nil
}); pollErr != nil {
Failf("Could not reach HTTP service through %v:%v%v after %v: %v", host, port, url, timeout, err)
}
return body
}
func testHTTPHealthCheckNodePort(ip string, port int, request string) (bool, error) {
ipPort := net.JoinHostPort(ip, strconv.Itoa(port))
url := fmt.Sprintf("http://%s%s", ipPort, request)
if ip == "" || port == 0 {
Failf("Got empty IP for reachability check (%s)", url)
return false, fmt.Errorf("Invalid input ip or port")
}
Logf("Testing HTTP health check on %v", url)
resp, err := httpGetNoConnectionPool(url)
if err != nil {
Logf("Got error testing for reachability of %s: %v", url, err)
return false, err
}
defer resp.Body.Close()
if err != nil {
Logf("Got error reading response from %s: %v", url, err)
return false, err
}
// HealthCheck responder returns 503 for no local endpoints
if resp.StatusCode == 503 {
return false, nil
}
// HealthCheck responder returns 200 for non-zero local endpoints
if resp.StatusCode == 200 {
return true, nil
}
return false, fmt.Errorf("Unexpected HTTP response code %s from health check responder at %s", resp.Status, url)
}
func (j *ServiceTestJig) TestHTTPHealthCheckNodePort(host string, port int, request string, timeout time.Duration, expectSucceed bool, threshold int) error {
count := 0
condition := func() (bool, error) {
success, _ := testHTTPHealthCheckNodePort(host, port, request)
if success && expectSucceed ||
!success && !expectSucceed {
count++
}
if count >= threshold {
return true, nil
}
return false, nil
}
if err := wait.PollImmediate(time.Second, timeout, condition); err != nil {
return fmt.Errorf("error waiting for healthCheckNodePort: expected at least %d succeed=%v on %v%v, got %d", threshold, expectSucceed, host, port, count)
}
return nil
}
// Simple helper class to avoid too much boilerplate in tests
type ServiceTestFixture struct {
ServiceName string
Namespace string
Client clientset.Interface
TestId string
Labels map[string]string
rcs map[string]bool
services map[string]bool
Name string
Image string
}
func NewServerTest(client clientset.Interface, namespace string, serviceName string) *ServiceTestFixture {
t := &ServiceTestFixture{}
t.Client = client
t.Namespace = namespace
t.ServiceName = serviceName
t.TestId = t.ServiceName + "-" + string(uuid.NewUUID())
t.Labels = map[string]string{
"testid": t.TestId,
}
t.rcs = make(map[string]bool)
t.services = make(map[string]bool)