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nlb.go
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nlb.go
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// Package nlb implements NLB plugin.
package nlb
import (
"bytes"
"context"
"crypto/tls"
"errors"
"fmt"
"io"
"net/http"
"os"
"strings"
"time"
"github.com/aws/aws-k8s-tester/eksconfig"
"github.com/aws/aws-k8s-tester/pkg/aws/elb"
k8sclient "github.com/aws/aws-k8s-tester/pkg/k8s-client"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/elbv2/elbv2iface"
"go.uber.org/zap"
appsv1 "k8s.io/api/apps/v1"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/intstr"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/utils/exec"
)
// Config defines ALB configuration.
type Config struct {
Logger *zap.Logger
Stopc chan struct{}
Sig chan os.Signal
EKSConfig *eksconfig.Config
K8SClient k8sClientSetGetter
ELB2API elbv2iface.ELBV2API
}
type k8sClientSetGetter interface {
KubernetesClientSet() *clientset.Clientset
}
// Tester defines Job tester.
type Tester interface {
// Create creates Job objects, and waits for completion.
Create() error
// Delete deletes all Job objects.
Delete() error
}
// New creates a new Job tester.
func New(cfg Config) (Tester, error) {
return &tester{cfg: cfg}, nil
}
type tester struct {
cfg Config
}
const (
nlbHelloWorldAppName = "hello-world"
nlbHelloWorldAppImageName = "dockercloud/hello-world"
nlbHelloWorldDeploymentName = "hello-world-deployment"
nlbHelloWorldServiceName = "hello-world-service"
)
func (ts *tester) Create() error {
if ts.cfg.EKSConfig.AddOnNLBHelloWorld.Created {
ts.cfg.Logger.Info("skipping create AddOnNLBHelloWorld")
return nil
}
ts.cfg.EKSConfig.AddOnNLBHelloWorld.Created = true
ts.cfg.EKSConfig.Sync()
createStart := time.Now()
defer func() {
ts.cfg.EKSConfig.AddOnNLBHelloWorld.CreateTook = time.Since(createStart)
ts.cfg.EKSConfig.AddOnNLBHelloWorld.CreateTookString = ts.cfg.EKSConfig.AddOnNLBHelloWorld.CreateTook.String()
ts.cfg.EKSConfig.Sync()
}()
if err := k8sclient.CreateNamespace(ts.cfg.Logger, ts.cfg.K8SClient.KubernetesClientSet(), ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace); err != nil {
return err
}
if err := ts.createDeployment(); err != nil {
return err
}
if err := ts.waitDeployment(); err != nil {
return err
}
if err := ts.createService(); err != nil {
return err
}
return ts.cfg.EKSConfig.Sync()
}
func (ts *tester) Delete() error {
if !ts.cfg.EKSConfig.AddOnNLBHelloWorld.Created {
ts.cfg.Logger.Info("skipping delete AddOnNLBHelloWorld")
return nil
}
deleteStart := time.Now()
defer func() {
ts.cfg.EKSConfig.AddOnNLBHelloWorld.DeleteTook = time.Since(deleteStart)
ts.cfg.EKSConfig.AddOnNLBHelloWorld.DeleteTookString = ts.cfg.EKSConfig.AddOnNLBHelloWorld.DeleteTook.String()
ts.cfg.EKSConfig.Sync()
}()
var errs []string
if err := ts.deleteService(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete NLB hello-world Service (%v)", err))
}
ts.cfg.Logger.Info("wait for a minute after deleting Service")
time.Sleep(time.Minute)
if err := ts.deleteDeployment(); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete NLB hello-world Deployment (%v)", err))
}
ts.cfg.Logger.Info("wait for a minute after deleting Deployment")
time.Sleep(time.Minute)
/*
# NLB tags
kubernetes.io/service-name
leegyuho-test-prod-nlb-hello-world/hello-world-service
kubernetes.io/cluster/leegyuho-test-prod
owned
*/
if err := elb.DeleteELBv2(
ts.cfg.Logger,
ts.cfg.ELB2API,
ts.cfg.EKSConfig.AddOnNLBHelloWorld.NLBARN,
ts.cfg.EKSConfig.Parameters.VPCID,
map[string]string{
"kubernetes.io/cluster/" + ts.cfg.EKSConfig.Name: "owned",
"kubernetes.io/service-name": ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace + "/" + nlbHelloWorldServiceName,
},
); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete NLB hello-world (%v)", err))
}
if err := k8sclient.DeleteNamespaceAndWait(ts.cfg.Logger,
ts.cfg.K8SClient.KubernetesClientSet(),
ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace,
k8sclient.DefaultNamespaceDeletionInterval,
k8sclient.DefaultNamespaceDeletionTimeout); err != nil {
errs = append(errs, fmt.Sprintf("failed to delete NLB namespace (%v)", err))
}
if len(errs) > 0 {
return errors.New(strings.Join(errs, ", "))
}
ts.cfg.EKSConfig.AddOnNLBHelloWorld.Created = false
return ts.cfg.EKSConfig.Sync()
}
func (ts *tester) createDeployment() error {
ts.cfg.Logger.Info("creating NLB hello-world Deployment")
_, err := ts.cfg.K8SClient.KubernetesClientSet().
AppsV1().
Deployments(ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace).
Create(&appsv1.Deployment{
TypeMeta: metav1.TypeMeta{
APIVersion: "apps/v1",
Kind: "Deployment",
},
ObjectMeta: metav1.ObjectMeta{
Name: nlbHelloWorldDeploymentName,
Namespace: ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace,
Labels: map[string]string{
"app": nlbHelloWorldAppName,
},
},
Spec: appsv1.DeploymentSpec{
Replicas: aws.Int32(ts.cfg.EKSConfig.AddOnNLBHelloWorld.DeploymentReplicas),
Selector: &metav1.LabelSelector{
MatchLabels: map[string]string{
"app": nlbHelloWorldAppName,
},
},
Template: v1.PodTemplateSpec{
ObjectMeta: metav1.ObjectMeta{
Labels: map[string]string{
"app": nlbHelloWorldAppName,
},
},
Spec: v1.PodSpec{
Containers: []v1.Container{
{
Name: nlbHelloWorldAppName,
Image: nlbHelloWorldAppImageName,
ImagePullPolicy: v1.PullAlways,
Ports: []v1.ContainerPort{
{
Protocol: v1.ProtocolTCP,
ContainerPort: 80,
},
},
},
},
},
},
},
})
if err != nil {
return fmt.Errorf("failed to create NLB hello-world Deployment (%v)", err)
}
ts.cfg.Logger.Info("created NLB hello-world Deployment")
return ts.cfg.EKSConfig.Sync()
}
func (ts *tester) deleteDeployment() error {
ts.cfg.Logger.Info("deleting NLB hello-world Deployment")
foreground := metav1.DeletePropagationForeground
err := ts.cfg.K8SClient.KubernetesClientSet().
AppsV1().
Deployments(ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace).
Delete(
nlbHelloWorldDeploymentName,
&metav1.DeleteOptions{
GracePeriodSeconds: aws.Int64(0),
PropagationPolicy: &foreground,
},
)
if err != nil && !strings.Contains(err.Error(), " not found") {
return fmt.Errorf("failed to delete NLB hello-world Deployment (%v)", err)
}
ts.cfg.Logger.Info("deleted NLB hello-world Deployment")
return ts.cfg.EKSConfig.Sync()
}
func (ts *tester) waitDeployment() error {
ts.cfg.Logger.Info("waiting for NLB hello-world Deployment")
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
output, err := exec.New().CommandContext(
ctx,
ts.cfg.EKSConfig.KubectlPath,
"--kubeconfig="+ts.cfg.EKSConfig.KubeConfigPath,
"--namespace="+ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace,
"describe",
"deployment",
nlbHelloWorldDeploymentName,
).CombinedOutput()
cancel()
if err != nil {
return fmt.Errorf("'kubectl describe deployment' failed %v", err)
}
out := string(output)
fmt.Printf("\n\n\"kubectl describe deployment\" output:\n%s\n\n", out)
ready := false
waitDur := 5*time.Minute + time.Duration(ts.cfg.EKSConfig.AddOnNLBHelloWorld.DeploymentReplicas)*time.Minute
retryStart := time.Now()
for time.Now().Sub(retryStart) < waitDur {
select {
case <-ts.cfg.Stopc:
return errors.New("check aborted")
case <-ts.cfg.Sig:
return errors.New("check aborted")
case <-time.After(15 * time.Second):
}
dresp, err := ts.cfg.K8SClient.KubernetesClientSet().
AppsV1().
Deployments(ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace).
Get(nlbHelloWorldDeploymentName, metav1.GetOptions{})
if err != nil {
return fmt.Errorf("failed to get Deployment (%v)", err)
}
ts.cfg.Logger.Info("get deployment",
zap.Int32("desired-replicas", dresp.Status.Replicas),
zap.Int32("available-replicas", dresp.Status.AvailableReplicas),
zap.Int32("unavailable-replicas", dresp.Status.UnavailableReplicas),
zap.Int32("ready-replicas", dresp.Status.ReadyReplicas),
)
available := false
for _, cond := range dresp.Status.Conditions {
ts.cfg.Logger.Info("condition",
zap.String("last-updated", cond.LastUpdateTime.String()),
zap.String("type", string(cond.Type)),
zap.String("status", string(cond.Status)),
zap.String("reason", cond.Reason),
zap.String("message", cond.Message),
)
if cond.Status != v1.ConditionTrue {
continue
}
if cond.Type == appsv1.DeploymentAvailable {
available = true
break
}
}
if available && dresp.Status.AvailableReplicas >= ts.cfg.EKSConfig.AddOnNLBHelloWorld.DeploymentReplicas {
ready = true
break
}
}
if !ready {
return errors.New("Deployment not ready")
}
ts.cfg.Logger.Info("waited for NLB hello-world Deployment")
return ts.cfg.EKSConfig.Sync()
}
func (ts *tester) createService() error {
ts.cfg.Logger.Info("creating NLB hello-world Service")
_, err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
Services(ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace).
Create(&v1.Service{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "Service",
},
ObjectMeta: metav1.ObjectMeta{
Name: nlbHelloWorldServiceName,
Namespace: ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace,
Annotations: map[string]string{
"service.beta.kubernetes.io/aws-load-balancer-type": "nlb",
},
},
Spec: v1.ServiceSpec{
Selector: map[string]string{
"app": nlbHelloWorldAppName,
},
Type: v1.ServiceTypeLoadBalancer,
Ports: []v1.ServicePort{
{
Protocol: v1.ProtocolTCP,
Port: 80,
TargetPort: intstr.FromInt(80),
},
},
},
})
if err != nil {
return fmt.Errorf("failed to create NLB hello-world Service (%v)", err)
}
ts.cfg.Logger.Info("created NLB hello-world Service")
waitDur := 3 * time.Minute
ts.cfg.Logger.Info("waiting for NLB hello-world Service", zap.Duration("wait", waitDur))
select {
case <-ts.cfg.Stopc:
return errors.New("NLB hello-world Service creation aborted")
case sig := <-ts.cfg.Sig:
return fmt.Errorf("received os signal %v", sig)
case <-time.After(waitDur):
}
hostName := ""
retryStart := time.Now()
for time.Now().Sub(retryStart) < waitDur {
select {
case <-ts.cfg.Stopc:
return errors.New("NLB hello-world Service creation aborted")
case sig := <-ts.cfg.Sig:
return fmt.Errorf("received os signal %v", sig)
case <-time.After(5 * time.Second):
}
ctx, cancel := context.WithTimeout(context.Background(), 15*time.Second)
clusterInfoOut, err := exec.New().CommandContext(
ctx,
ts.cfg.EKSConfig.KubectlPath,
"--kubeconfig="+ts.cfg.EKSConfig.KubeConfigPath,
"--namespace="+ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace,
"describe",
"svc",
nlbHelloWorldServiceName,
).CombinedOutput()
cancel()
if err != nil {
ts.cfg.Logger.Warn("'kubectl describe svc' failed", zap.Error(err))
} else {
out := string(clusterInfoOut)
fmt.Printf("\n\n\"kubectl describe svc %s\" output:\n%s\n\n", nlbHelloWorldServiceName, out)
}
ts.cfg.Logger.Info("querying NLB hello-world Service for HTTP endpoint")
so, err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
Services(ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace).
Get(nlbHelloWorldServiceName, metav1.GetOptions{})
if err != nil {
ts.cfg.Logger.Warn("failed to get NLB hello-world Service; retrying", zap.Error(err))
time.Sleep(5 * time.Second)
continue
}
ts.cfg.Logger.Info(
"NLB hello-world Service has been linked to LoadBalancer",
zap.String("load-balancer", fmt.Sprintf("%+v", so.Status.LoadBalancer)),
)
for _, ing := range so.Status.LoadBalancer.Ingress {
ts.cfg.Logger.Info(
"NLB hello-world Service has been linked to LoadBalancer.Ingress",
zap.String("ingress", fmt.Sprintf("%+v", ing)),
)
hostName = ing.Hostname
break
}
if hostName != "" {
ts.cfg.Logger.Info("found NLB host name", zap.String("host-name", hostName))
break
}
}
if hostName == "" {
return errors.New("failed to find NLB host name")
}
// TODO: is there any better way to find out the NLB name?
ts.cfg.EKSConfig.AddOnNLBHelloWorld.NLBName = strings.Split(hostName, "-")[0]
ss := strings.Split(hostName, ".")[0]
ss = strings.Replace(ss, "-", "/", -1)
ts.cfg.EKSConfig.AddOnNLBHelloWorld.NLBARN = fmt.Sprintf(
"arn:aws:elasticloadbalancing:%s:%s:loadbalancer/net/%s",
ts.cfg.EKSConfig.Region,
ts.cfg.EKSConfig.Status.AWSAccountID,
ss,
)
ts.cfg.EKSConfig.AddOnNLBHelloWorld.URL = "http://" + hostName
ts.cfg.EKSConfig.Sync()
fmt.Printf("\nNLB hello-world ARN %s\n", ts.cfg.EKSConfig.AddOnNLBHelloWorld.NLBARN)
fmt.Printf("NLB hello-world Name %s\n", ts.cfg.EKSConfig.AddOnNLBHelloWorld.NLBName)
fmt.Printf("NLB hello-world URL %s\n\n", ts.cfg.EKSConfig.AddOnNLBHelloWorld.URL)
ts.cfg.Logger.Info("waiting before testing hello-world Service")
time.Sleep(20 * time.Second)
retryStart = time.Now()
for time.Now().Sub(retryStart) < waitDur {
select {
case <-ts.cfg.Stopc:
return errors.New("hello-world Service creation aborted")
case sig := <-ts.cfg.Sig:
return fmt.Errorf("received os signal %v", sig)
case <-time.After(5 * time.Second):
}
buf := bytes.NewBuffer(nil)
err = httpReadInsecure(ts.cfg.Logger, ts.cfg.EKSConfig.AddOnNLBHelloWorld.URL, buf)
if err != nil {
ts.cfg.Logger.Warn("failed to read NLB hello-world Service; retrying", zap.Error(err))
time.Sleep(5 * time.Second)
continue
}
httpOutput := buf.String()
fmt.Printf("\nNLB hello-world Service output:\n%s\n", httpOutput)
if strings.Contains(httpOutput, `<h1>Hello world!</h1>`) {
ts.cfg.Logger.Info(
"read hello-world Service; exiting",
zap.String("host-name", hostName),
)
break
}
ts.cfg.Logger.Warn("unexpected hello-world Service output; retrying")
}
return ts.cfg.EKSConfig.Sync()
}
func (ts *tester) deleteService() error {
ts.cfg.Logger.Info("deleting NLB hello-world Service")
foreground := metav1.DeletePropagationForeground
err := ts.cfg.K8SClient.KubernetesClientSet().
CoreV1().
Services(ts.cfg.EKSConfig.AddOnNLBHelloWorld.Namespace).
Delete(
nlbHelloWorldServiceName,
&metav1.DeleteOptions{
GracePeriodSeconds: aws.Int64(0),
PropagationPolicy: &foreground,
},
)
if err != nil && !strings.Contains(err.Error(), " not found") {
return fmt.Errorf("failed to delete NLB hello-world Service (%v)", err)
}
ts.cfg.Logger.Info("deleted NLB hello-world Service", zap.Error(err))
return ts.cfg.EKSConfig.Sync()
}
// curl -k [URL]
func httpReadInsecure(lg *zap.Logger, u string, wr io.Writer) error {
lg.Info("reading", zap.String("url", u))
cli := &http.Client{
Timeout: 5 * time.Second,
Transport: &http.Transport{
TLSClientConfig: &tls.Config{
InsecureSkipVerify: true,
},
}}
r, err := cli.Get(u)
if err != nil {
return err
}
defer r.Body.Close()
if r.StatusCode >= 400 {
return fmt.Errorf("%q returned %d", u, r.StatusCode)
}
_, err = io.Copy(wr, r.Body)
if err != nil {
lg.Warn("failed to read", zap.String("url", u), zap.Error(err))
} else {
lg.Info("read", zap.String("url", u))
}
return err
}