/
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 pilot
import (
"fmt"
"io"
"net"
multierror "github.com/hashicorp/go-multierror"
"istio.io/istio/pkg/test/framework/api/component"
"istio.io/istio/pkg/test/framework/api/components"
testContext "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"
testKube "istio.io/istio/pkg/test/kube"
)
const (
pilotService = "istio-pilot"
grpcPortName = "grpc-xds"
)
var (
_ components.Pilot = &kubeComponent{}
_ api.Component = &kubeComponent{}
_ io.Closer = &kubeComponent{}
)
// NewKubeComponent factory function for the component
func NewKubeComponent() (api.Component, error) {
return &kubeComponent{}, nil
}
type kubeComponent struct {
*client
forwarder testKube.PortForwarder
scope lifecycle.Scope
}
func (c *kubeComponent) Descriptor() component.Descriptor {
return descriptors.Pilot
}
func (c *kubeComponent) Scope() lifecycle.Scope {
return c.scope
}
func (c *kubeComponent) Start(ctx testContext.Instance, scope lifecycle.Scope) (err error) {
c.scope = scope
env, err := kube.GetEnvironment(ctx)
if err != nil {
return err
}
n := env.NamespaceForScope(scope)
fetchFn := env.NewSinglePodFetch(n, "istio=pilot")
if err := env.WaitUntilPodsAreReady(fetchFn); err != nil {
return err
}
pods, err := fetchFn()
if err != nil {
return err
}
pod := pods[0]
port, err := getGrpcPort(env, n)
if err != nil {
return err
}
defer func() {
if err != nil {
_ = c.Close()
}
}()
// Start port-forwarding for pilot.
options := &testKube.PodSelectOptions{
PodNamespace: pod.Namespace,
PodName: pod.Name,
}
c.forwarder, err = env.NewPortForwarder(options, 0, port)
if err != nil {
return err
}
if err = c.forwarder.Start(); err != nil {
return err
}
var addr *net.TCPAddr
addr, err = net.ResolveTCPAddr("tcp", c.forwarder.Address())
if err != nil {
return err
}
c.client, err = newClient(addr)
if err != nil {
return err
}
return nil
}
// Close stops the kube pilot server.
func (c *kubeComponent) Close() (err error) {
if c.client != nil {
err = multierror.Append(err, c.client.Close()).ErrorOrNil()
c.client = nil
}
if c.forwarder != nil {
err = multierror.Append(err, c.forwarder.Close()).ErrorOrNil()
c.forwarder = nil
}
return
}
func getGrpcPort(e *kube.Environment, ns string) (uint16, error) {
svc, err := e.Accessor.GetService(ns, pilotService)
if err != nil {
return 0, fmt.Errorf("failed to retrieve service %s: %v", pilotService, err)
}
for _, portInfo := range svc.Spec.Ports {
if portInfo.Name == grpcPortName {
return uint16(portInfo.TargetPort.IntValue()), nil
}
}
return 0, fmt.Errorf("failed to get target port in service %s", pilotService)
}