agola/internal/testutil/utils.go

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// Copyright 2019 Sorint.lab
//
// 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 testutil
import (
"bufio"
"context"
"fmt"
"net"
"net/url"
"os"
"os/exec"
"path/filepath"
"strconv"
"sync"
"testing"
"time"
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"agola.io/agola/internal/etcd"
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"go.etcd.io/etcd/embed"
"go.uber.org/zap"
uuid "github.com/satori/go.uuid"
"github.com/sgotti/gexpect"
)
const (
sleepInterval = 500 * time.Millisecond
etcdTimeout = 5 * time.Second
MinPort = 2048
MaxPort = 16384
)
var curPort = MinPort
var portMutex = sync.Mutex{}
type Process struct {
t *testing.T
uid string
name string
args []string
Cmd *gexpect.ExpectSubprocess
bin string
}
func (p *Process) start() error {
if p.Cmd != nil {
panic(fmt.Errorf("%s: cmd not cleanly stopped", p.uid))
}
cmd := exec.Command(p.bin, p.args...)
pr, pw, err := os.Pipe()
if err != nil {
return err
}
p.Cmd = &gexpect.ExpectSubprocess{Cmd: cmd, Output: pw}
if err := p.Cmd.Start(); err != nil {
return err
}
go func() {
scanner := bufio.NewScanner(pr)
for scanner.Scan() {
p.t.Logf("[%s %s]: %s", p.name, p.uid, scanner.Text())
}
}()
return nil
}
func (p *Process) Start() error {
if err := p.start(); err != nil {
return err
}
p.Cmd.Continue()
return nil
}
func (p *Process) StartExpect() error {
return p.start()
}
func (p *Process) Signal(sig os.Signal) error {
p.t.Logf("signalling %s %s with %s", p.name, p.uid, sig)
if p.Cmd == nil {
panic(fmt.Errorf("p: %s, cmd is empty", p.uid))
}
return p.Cmd.Cmd.Process.Signal(sig)
}
func (p *Process) Kill() {
p.t.Logf("killing %s %s", p.name, p.uid)
if p.Cmd == nil {
panic(fmt.Errorf("p: %s, cmd is empty", p.uid))
}
_ = p.Cmd.Cmd.Process.Signal(os.Kill)
_ = p.Cmd.Wait()
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p.Cmd = nil
}
func (p *Process) Stop() {
p.t.Logf("stopping %s %s", p.name, p.uid)
if p.Cmd == nil {
panic(fmt.Errorf("p: %s, cmd is empty", p.uid))
}
p.Cmd.Continue()
_ = p.Cmd.Cmd.Process.Signal(os.Interrupt)
_ = p.Cmd.Wait()
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p.Cmd = nil
}
func (p *Process) Wait(timeout time.Duration) error {
timeoutCh := time.NewTimer(timeout).C
endCh := make(chan error)
go func() {
err := p.Cmd.Wait()
endCh <- err
}()
select {
case <-timeoutCh:
return fmt.Errorf("timeout waiting on process")
case <-endCh:
return nil
}
}
type TestEmbeddedEtcd struct {
t *testing.T
*TestEtcd
Etcd *embed.Etcd
Endpoint string
ListenAddress string
Port string
}
func NewTestEmbeddedEtcd(t *testing.T, logger *zap.Logger, dir string, a ...string) (*TestEmbeddedEtcd, error) {
u := uuid.NewV4()
uid := fmt.Sprintf("%x", u[:4])
dataDir := filepath.Join(dir, fmt.Sprintf("etcd%s", uid))
listenAddress, port, err := GetFreePort(true, false)
if err != nil {
return nil, err
}
listenAddress2, port2, err := GetFreePort(true, false)
if err != nil {
return nil, err
}
cfg := embed.NewConfig()
cfg.Name = uid
cfg.Dir = dataDir
cfg.Logger = "zap"
cfg.LogOutputs = []string{"stdout"}
lcurl, _ := url.Parse(fmt.Sprintf("http://%s:%s", listenAddress, port))
lpurl, _ := url.Parse(fmt.Sprintf("http://%s:%s", listenAddress2, port2))
cfg.LCUrls = []url.URL{*lcurl}
cfg.ACUrls = []url.URL{*lcurl}
cfg.LPUrls = []url.URL{*lpurl}
cfg.APUrls = []url.URL{*lpurl}
cfg.InitialCluster = cfg.InitialClusterFromName(cfg.Name)
t.Logf("starting embedded etcd server")
embeddedEtcd, err := embed.StartEtcd(cfg)
if err != nil {
return nil, err
}
storeEndpoint := fmt.Sprintf("http://%s:%s", listenAddress, port)
storeConfig := etcd.Config{
Logger: logger,
Endpoints: storeEndpoint,
}
e, err := etcd.New(storeConfig)
if err != nil {
return nil, fmt.Errorf("cannot create store: %v", err)
}
tectd := &TestEmbeddedEtcd{
t: t,
TestEtcd: &TestEtcd{
e,
t,
},
Etcd: embeddedEtcd,
Endpoint: storeEndpoint,
ListenAddress: listenAddress,
Port: port,
}
return tectd, nil
}
func (te *TestEmbeddedEtcd) Start() error {
<-te.Etcd.Server.ReadyNotify()
return nil
}
func (te *TestEmbeddedEtcd) Stop() error {
te.Etcd.Close()
return nil
}
func (te *TestEmbeddedEtcd) Kill() error {
te.Etcd.Close()
return nil
}
type TestExternalEtcd struct {
t *testing.T
*TestEtcd
Process
Endpoint string
ListenAddress string
Port string
}
func NewTestExternalEtcd(t *testing.T, logger *zap.Logger, dir string, a ...string) (*TestExternalEtcd, error) {
u := uuid.NewV4()
uid := fmt.Sprintf("%x", u[:4])
dataDir := filepath.Join(dir, fmt.Sprintf("etcd%s", uid))
listenAddress, port, err := GetFreePort(true, false)
if err != nil {
return nil, err
}
listenAddress2, port2, err := GetFreePort(true, false)
if err != nil {
return nil, err
}
args := []string{}
args = append(args, fmt.Sprintf("--name=%s", uid))
args = append(args, fmt.Sprintf("--data-dir=%s", dataDir))
args = append(args, fmt.Sprintf("--listen-client-urls=http://%s:%s", listenAddress, port))
args = append(args, fmt.Sprintf("--advertise-client-urls=http://%s:%s", listenAddress, port))
args = append(args, fmt.Sprintf("--listen-peer-urls=http://%s:%s", listenAddress2, port2))
args = append(args, fmt.Sprintf("--initial-advertise-peer-urls=http://%s:%s", listenAddress2, port2))
args = append(args, fmt.Sprintf("--initial-cluster=%s=http://%s:%s", uid, listenAddress2, port2))
args = append(args, a...)
storeEndpoint := fmt.Sprintf("http://%s:%s", listenAddress, port)
storeConfig := etcd.Config{
Logger: logger,
Endpoints: storeEndpoint,
}
e, err := etcd.New(storeConfig)
if err != nil {
return nil, fmt.Errorf("cannot create store: %v", err)
}
bin := os.Getenv("ETCD_BIN")
if bin == "" {
return nil, fmt.Errorf("missing ETCD_BIN env")
}
tectd := &TestExternalEtcd{
t: t,
TestEtcd: &TestEtcd{
e,
t,
},
Process: Process{
t: t,
uid: uid,
name: "etcd",
bin: bin,
args: args,
},
Endpoint: storeEndpoint,
ListenAddress: listenAddress,
Port: port,
}
return tectd, nil
}
type TestEtcd struct {
*etcd.Store
t *testing.T
}
func (te *TestEtcd) Compact() error {
ctx, cancel := context.WithTimeout(context.Background(), etcdTimeout)
defer cancel()
resp, err := te.Get(ctx, "anykey", 0)
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if err != nil && err != etcd.ErrKeyNotFound {
return err
}
_, err = te.Client().Compact(ctx, resp.Header.Revision)
return err
}
func (te *TestEtcd) WaitUp(timeout time.Duration) error {
start := time.Now()
for time.Now().Add(-timeout).Before(start) {
ctx, cancel := context.WithTimeout(context.Background(), etcdTimeout)
defer cancel()
_, err := te.Get(ctx, "anykey", 0)
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if err != nil && err == etcd.ErrKeyNotFound {
return nil
}
if err == nil {
return nil
}
time.Sleep(sleepInterval)
}
return fmt.Errorf("timeout")
}
func (te *TestEtcd) WaitDown(timeout time.Duration) error {
start := time.Now()
for time.Now().Add(-timeout).Before(start) {
ctx, cancel := context.WithTimeout(context.Background(), etcdTimeout)
defer cancel()
_, err := te.Get(ctx, "anykey", 0)
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if err != nil && err != etcd.ErrKeyNotFound {
return nil
}
time.Sleep(sleepInterval)
}
return fmt.Errorf("timeout")
}
func testFreeTCPPort(port int) error {
ln, err := net.Listen("tcp", fmt.Sprintf("localhost:%d", port))
if err != nil {
return err
}
ln.Close()
return nil
}
func testFreeUDPPort(port int) error {
ln, err := net.ListenPacket("udp", fmt.Sprintf("localhost:%d", port))
if err != nil {
return err
}
ln.Close()
return nil
}
// Hack to find a free tcp and udp port
func GetFreePort(tcp bool, udp bool) (string, string, error) {
portMutex.Lock()
defer portMutex.Unlock()
if !tcp && !udp {
return "", "", fmt.Errorf("at least one of tcp or udp port shuld be required")
}
localhostIP, err := net.ResolveIPAddr("ip", "localhost")
if err != nil {
return "", "", fmt.Errorf("failed to resolve ip addr: %v", err)
}
for {
curPort++
if curPort > MaxPort {
return "", "", fmt.Errorf("all available ports to test have been exausted")
}
if tcp {
if err := testFreeTCPPort(curPort); err != nil {
continue
}
}
if udp {
if err := testFreeUDPPort(curPort); err != nil {
continue
}
}
return localhostIP.IP.String(), strconv.Itoa(curPort), nil
}
}