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/*
Copyright 2023 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 (
"context"
"fmt"
"log"
"net"
"path/filepath"
"strconv"
"sync"
"testing"
"time"
"github.com/google/uuid"
"k8s.io/apimachinery/pkg/util/wait"
serverapp "sigs.k8s.io/apiserver-network-proxy/cmd/server/app"
serveropts "sigs.k8s.io/apiserver-network-proxy/cmd/server/app/options"
"sigs.k8s.io/apiserver-network-proxy/pkg/server"
metricstest "sigs.k8s.io/apiserver-network-proxy/pkg/testing/metrics"
)
type ProxyServerOpts struct {
ServerCount int
Mode string
AgentPort int // Defaults to random port.
}
type ProxyServerRunner interface {
Start(testing.TB, ProxyServerOpts) (ProxyServer, error)
}
type ProxyServer interface {
ConnectedBackends() (int, error)
AgentAddr() string
FrontAddr() string
Ready() bool
Stop()
Metrics() metricstest.ServerTester
}
type InProcessProxyServerRunner struct{}
func (*InProcessProxyServerRunner) Start(t testing.TB, opts ProxyServerOpts) (ProxyServer, error) {
s := &serverapp.Proxy{}
o, err := serverOptions(t, opts)
if err != nil {
return nil, fmt.Errorf("error building server options: %w", err)
}
ctx, cancel := context.WithCancel(context.Background())
stopCh := make(chan struct{})
go func() {
if err := s.Run(o, stopCh); err != nil {
log.Printf("ERROR running proxy server: %v", err)
cancel()
}
}()
healthAddr := net.JoinHostPort(o.HealthBindAddress, strconv.Itoa(o.HealthPort))
if err := wait.PollImmediateWithContext(ctx, 100*time.Millisecond, ForeverTestTimeout, func(context.Context) (bool, error) {
return checkLiveness(healthAddr), nil
}); err != nil {
close(stopCh)
return nil, fmt.Errorf("server never came up: %v", err)
}
ps := &inProcessProxyServer{
proxyServer: s.ProxyServer(),
stopCh: stopCh,
mode: opts.Mode,
healthAddr: healthAddr,
agentAddr: net.JoinHostPort(o.AgentBindAddress, strconv.Itoa(o.AgentPort)),
frontAddr: o.UdsName,
}
t.Cleanup(ps.Stop)
return ps, nil
}
type inProcessProxyServer struct {
proxyServer *server.ProxyServer
stopOnce sync.Once
stopCh chan struct{}
mode string
healthAddr string
agentAddr string
frontAddr string
}
func (ps *inProcessProxyServer) Stop() {
ps.stopOnce.Do(func() {
close(ps.stopCh)
})
}
func (ps *inProcessProxyServer) AgentAddr() string {
return ps.agentAddr
}
func (ps *inProcessProxyServer) FrontAddr() string {
return ps.frontAddr
}
func (ps *inProcessProxyServer) ConnectedBackends() (int, error) {
numBackends := 0
for _, bm := range ps.proxyServer.BackendManagers {
numBackends += bm.NumBackends()
}
return numBackends, nil
}
func (ps *inProcessProxyServer) Ready() bool {
return checkReadiness(ps.healthAddr)
}
func (ps *inProcessProxyServer) Metrics() metricstest.ServerTester {
return metricstest.DefaultTester
}
func serverOptions(t testing.TB, opts ProxyServerOpts) (*serveropts.ProxyRunOptions, error) {
t.Helper()
o := serveropts.NewProxyRunOptions()
o.ServerCount = opts.ServerCount
o.Mode = opts.Mode
uid := uuid.New().String()
o.UdsName = filepath.Join(CertsDir, fmt.Sprintf("server-%s.sock", uid))
o.ServerPort = 0 // Required for UDS
o.ClusterCert = filepath.Join(CertsDir, TestServerCertFile)
o.ClusterKey = filepath.Join(CertsDir, TestServerKeyFile)
o.ClusterCaCert = filepath.Join(CertsDir, TestCAFile)
const localhost = "127.0.0.1"
o.AgentBindAddress = localhost
o.HealthBindAddress = localhost
o.AdminBindAddress = localhost
ports, err := FreePorts(3)
if err != nil {
return nil, err
}
if opts.AgentPort != 0 {
o.AgentPort = opts.AgentPort
} else {
o.AgentPort = ports[0]
}
o.HealthPort = ports[1]
o.AdminPort = ports[2]
return o, nil
}
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