/
kube.go
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/
kube.go
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// Copyright 2018 Istio 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 ingress
import (
"errors"
"fmt"
"io/ioutil"
"net/http"
"strings"
"time"
"istio.io/istio/pkg/test/framework/api/component"
"istio.io/istio/pkg/test/framework/api/components"
"istio.io/istio/pkg/test/framework/api/context"
"istio.io/istio/pkg/test/framework/api/descriptors"
"istio.io/istio/pkg/test/framework/api/lifecycle"
"istio.io/istio/pkg/test/framework/runtime/api"
"istio.io/istio/pkg/test/framework/runtime/components/environment/kube"
"istio.io/istio/pkg/test/scopes"
"istio.io/istio/pkg/test/util/retry"
)
const (
serviceName = "istio-ingressgateway"
istioLabel = "ingressgateway"
)
var (
retryTimeout = retry.Timeout(1 * time.Minute)
retryDelay = retry.Delay(5 * time.Second)
_ components.Ingress = &kubeComponent{}
_ api.Component = &kubeComponent{}
)
type kubeComponent struct {
scope lifecycle.Scope
address string
}
// NewKubeComponent factory function for the component
func NewKubeComponent() (api.Component, error) {
return &kubeComponent{}, nil
}
func (c *kubeComponent) Descriptor() component.Descriptor {
return descriptors.Ingress
}
func (c *kubeComponent) Scope() lifecycle.Scope {
return c.scope
}
func (c *kubeComponent) Start(ctx context.Instance, scope lifecycle.Scope) (err error) {
c.scope = scope
env, err := kube.GetEnvironment(ctx)
if err != nil {
return err
}
address, err := retry.Do(func() (interface{}, bool, error) {
// In Minikube, we don't have the ingress gateway. Instead we do a little bit of trickery to to get the Node
// port.
n := env.SystemNamespace()
if env.MinikubeIngress() {
pods, err := env.GetPods(n, fmt.Sprintf("istio=%s", istioLabel))
if err != nil {
return nil, false, err
}
if len(pods) == 0 {
return nil, false, errors.New("no ingress pod found")
}
ip := pods[0].Status.HostIP
if ip == "" {
return nil, false, errors.New("no Host IP availale on the ingress node yet")
}
svc, err := env.Accessor.GetService(n, serviceName)
if err != nil {
return nil, false, err
}
if len(svc.Spec.Ports) == 0 {
return nil, false, fmt.Errorf("no ports found in service: %s/%s", n, "istio-ingressgateway")
}
port := svc.Spec.Ports[0].NodePort
return fmt.Sprintf("http://%s:%d", ip, port), true, nil
}
// Otherwise, get the load balancer IP.
svc, err := env.Accessor.GetService(n, serviceName)
if err != nil {
return nil, false, err
}
if len(svc.Status.LoadBalancer.Ingress) == 0 || svc.Status.LoadBalancer.Ingress[0].IP == "" {
return nil, false, fmt.Errorf("service ingress is not available yet: %s/%s", svc.Name, svc.Namespace)
}
ip := svc.Status.LoadBalancer.Ingress[0].IP
return fmt.Sprintf("http://%s", ip), true, nil
}, retryTimeout, retryDelay)
if err != nil {
return err
}
c.address = address.(string)
return nil
}
// Address implements environment.DeployedIngress
func (c *kubeComponent) Address() string {
return c.address
}
func (c *kubeComponent) Call(path string) (components.IngressCallResponse, error) {
client := &http.Client{
Timeout: 1 * time.Minute,
}
if !strings.HasPrefix(path, "/") {
path = "/" + path
}
url := c.address + path
scopes.Framework.Debugf("Sending call to ingress at: %s", url)
req, err := http.NewRequest("GET", url, nil)
if err != nil {
return components.IngressCallResponse{}, err
}
resp, err := client.Do(req)
if err != nil {
return components.IngressCallResponse{}, err
}
defer func() { _ = resp.Body.Close() }()
var ba []byte
ba, err = ioutil.ReadAll(resp.Body)
if err != nil {
scopes.Framework.Warnf("Unable to connect to read from %s: %v", c.address, err)
return components.IngressCallResponse{}, err
}
contents := string(ba)
status := resp.StatusCode
response := components.IngressCallResponse{
Code: status,
Body: contents,
}
// scopes.Framework.Debugf("Received response to ingress call (url: %s): %+v", url, response)
return response, nil
}