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envoy.go
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envoy.go
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// Copyright 2017 Istio Authors. All Rights Reserved.
//
// 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 env
import (
"fmt"
"log"
"os"
"os/exec"
"path/filepath"
"strconv"
"istio.io/istio/tests/util"
)
// Envoy stores data for Envoy process
type Envoy struct {
cmd *exec.Cmd
ports *Ports
}
// NewEnvoy creates a new Envoy struct and starts envoy.
func (s *TestSetup) NewEnvoy(stress bool, filtersBeforeMixer string, mfConf *MixerFilterConf, ports *Ports, epoch int,
confVersion string, disableHotRestart bool) (*Envoy, error) {
confPath := filepath.Join(util.IstioOut, fmt.Sprintf("config.conf.%v.json", ports.AdminPort))
log.Printf("Envoy config: in %v\n", confPath)
if err := s.CreateEnvoyConf(confPath, stress, filtersBeforeMixer, mfConf, ports, confVersion); err != nil {
return nil, err
}
debugLevel := os.Getenv("ENVOY_DEBUG")
if len(debugLevel) == 0 {
debugLevel = "info"
}
// Don't use hot-start, each Envoy re-start use different base-id
args := []string{"-c", confPath,
"--base-id", strconv.Itoa(int(ports.AdminPort) + epoch)}
if stress {
args = append(args, "--concurrency", "10")
} else {
// debug is far too verbose.
args = append(args, "-l", debugLevel, "--concurrency", "1")
}
if disableHotRestart {
args = append(args, "--disable-hot-restart")
}
if s.EnvoyParams != nil {
args = append(args, s.EnvoyParams...)
}
/* #nosec */
envoyPath := filepath.Join(util.IstioBin, "envoy")
if path, exists := os.LookupEnv("ENVOY_PATH"); exists {
envoyPath = path
}
cmd := exec.Command(envoyPath, args...)
cmd.Stderr = os.Stderr
cmd.Stdout = os.Stdout
return &Envoy{
cmd: cmd,
ports: ports,
}, nil
}
// Start starts the envoy process
func (s *Envoy) Start() error {
err := s.cmd.Start()
if err != nil {
return err
}
url := fmt.Sprintf("http://localhost:%v/server_info", s.ports.AdminPort)
WaitForHTTPServer(url)
return nil
}
// Stop stops the envoy process
func (s *Envoy) Stop() error {
log.Printf("Kill Envoy ...\n")
err := s.cmd.Process.Kill()
log.Printf("Kill Envoy ... Done\n")
return err
}