houston package 독립

This commit is contained in:
2023-05-21 23:37:54 +09:00
commit 3e8c79a48b
20 changed files with 3152 additions and 0 deletions

329
client/client.go Normal file
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package client
import (
"context"
"go-ayo/common/logger"
"houston/shared"
"houston/shared/protos"
"io"
"os"
"os/exec"
"path"
"reflect"
"sort"
"strconv"
"sync/atomic"
"unsafe"
"time"
"github.com/shirou/gopsutil/v3/cpu"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
sigar "github.com/cloudfoundry/gosigar"
)
type HoustonClient interface {
SetReportMetrics(map[string]float32)
Shutdown()
}
type procmeta struct {
cmd *exec.Cmd
name string
version string
state protos.ProcessState
stdin io.WriteCloser
stdPrefix string
stdoutSize int32
stderrSize int32
}
type houstonClient struct {
client *grpc.ClientConn
childProcs []*procmeta
extraMetrics unsafe.Pointer // map[string]float32
deploys map[string][]*protos.VersionAndArgs
shutdownFunc context.CancelFunc
exitChan chan *exec.Cmd
httpAddr string
timestamp string
}
func bToMb(b uint64) uint32 {
return uint32(b / 1024 / 1024)
}
func unmarshal[T any](val *T, src map[string]string) {
argval := reflect.ValueOf(val)
for i := 0; i < argval.Elem().Type().NumField(); i++ {
if !argval.Elem().Type().Field(i).IsExported() {
continue
}
arg := src[argval.Elem().Type().Field(i).Name]
if argval.Elem().Field(i).CanInt() {
num, _ := strconv.ParseInt(arg, 10, 0)
argval.Elem().Field(i).SetInt(num)
} else {
argval.Elem().Field(i).SetString(arg)
}
}
}
func gatherDeployedPrograms(name string) []*protos.VersionAndArgs {
var rawvers []*protos.VersionAndArgs
if vers, err := os.ReadDir(path.Join("./", name)); err == nil {
for _, ver := range vers {
if ver.IsDir() {
args := lastExecutionArgs(path.Join(name, ver.Name()))
rawvers = append(rawvers, &protos.VersionAndArgs{
Version: ver.Name(),
Args: args,
})
}
}
}
sort.Slice(rawvers, func(i, j int) bool {
leftParsed := parseVersionString(rawvers[i].Version)
rightParsed := parseVersionString(rawvers[j].Version)
return compareVersionString(leftParsed, rightParsed) < 0
})
return rawvers
}
func (hc *houstonClient) makeOperationQueryRequest() *protos.OperationQueryRequest {
hn, _ := os.Hostname()
procs := make([]*protos.ProcessDescription, 0, len(hc.childProcs))
for _, child := range hc.childProcs {
procs = append(procs, &protos.ProcessDescription{
Name: child.name,
Args: child.cmd.Args,
Version: child.version,
State: child.state,
Pid: int32(child.cmd.Process.Pid),
StdoutSize: atomic.LoadInt32(&child.stdoutSize),
StderrSize: atomic.LoadInt32(&child.stderrSize),
})
}
var deploys []*protos.DeployedVersions
for name, prog := range hc.deploys {
deploys = append(deploys, &protos.DeployedVersions{
Name: name,
Versions: prog,
})
}
return &protos.OperationQueryRequest{
Hostname: hn,
Procs: procs,
Deploys: deploys,
}
}
func NewClient(grpcAddr string, httpAddr string) (HoustonClient, error) {
client, err := grpc.Dial(grpcAddr, grpc.WithBlock(), grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
return nil, err
}
exefile, err := os.Executable()
if err != nil {
return nil, err
}
exefi, err := os.Stat(exefile)
if err != nil {
return nil, err
}
deploys := make(map[string][]*protos.VersionAndArgs)
if dirs, err := os.ReadDir("./"); err == nil {
for _, dir := range dirs {
if dir.IsDir() {
flagf := path.Join(dir.Name(), "@houston")
if _, err := os.Stat(flagf); !os.IsNotExist(err) {
deploys[dir.Name()] = gatherDeployedPrograms(dir.Name())
}
}
}
}
hc := &houstonClient{
client: client,
extraMetrics: unsafe.Pointer(&map[string]float32{}),
deploys: deploys,
httpAddr: httpAddr,
timestamp: exefi.ModTime().String(),
}
ctx, cancel := context.WithCancel(context.Background())
go func() {
// regularly send status
sc := protos.NewMonitorClient(client)
hn, _ := os.Hostname()
mem := sigar.Mem{}
mem.Get()
metrics := &protos.Metrics{
Hostname: hn,
Total: bToMb(mem.Total),
}
for {
select {
case <-ctx.Done():
return
case <-time.After(5 * time.Second):
percent, _ := cpu.Percent(0, false)
metrics.Cpu = float32(percent[0])
metrics.Free = bToMb(mem.ActualFree)
metrics.Metrics = *(*map[string]float32)(atomic.LoadPointer(&hc.extraMetrics))
sc.Report(context.Background(), metrics, grpc.WaitForReady(true))
mem.Get()
}
}
}()
exitChan := make(chan *exec.Cmd, 10)
operationChan := make(chan *protos.OperationQueryResponse, 10)
go func() {
// 메인 operator
op := protos.NewOperationClient(hc.client)
for {
select {
case <-ctx.Done():
return
case exited := <-exitChan:
for _, proc := range hc.childProcs {
if proc.cmd == exited && proc.state != protos.ProcessState_Stopped {
proc.state = protos.ProcessState_Stopped
op.Refresh(ctx, hc.makeOperationQueryRequest())
break
}
}
case resp := <-operationChan:
switch shared.Operation(resp.Operation) {
case shared.Deploy:
var dr shared.DeployRequest
unmarshal(&dr, resp.Args)
err := hc.deploy(&dr)
if err == nil {
prog := gatherDeployedPrograms(dr.Name)
hc.deploys[dr.Name] = prog
op.Refresh(ctx, hc.makeOperationQueryRequest())
} else {
logger.Println(err)
}
case shared.Withdraw:
var wr shared.WithdrawRequest
unmarshal(&wr, resp.Args)
err := hc.withdraw(&wr)
if err == nil {
prog := gatherDeployedPrograms(wr.Name)
hc.deploys[wr.Name] = prog
op.Refresh(ctx, hc.makeOperationQueryRequest())
} else {
logger.Println(err)
}
case shared.Start:
var sr shared.StartProcessRequest
unmarshal(&sr, resp.Args)
if err := hc.startChildProcess(&sr); err != nil {
logger.Println(err)
}
case shared.Stop:
var sr shared.StopProcessRequest
unmarshal(&sr, resp.Args)
if err := hc.stopChildProcess(&sr); err != nil {
logger.Println(err)
}
case shared.Restart:
var rr shared.RestartProcessRequest
unmarshal(&rr, resp.Args)
if err := hc.restartChildProcess(&rr); err != nil {
logger.Println(err)
}
case shared.Upload:
var ur shared.UploadRequest
unmarshal(&ur, resp.Args)
if err := hc.uploadFiles(&ur); err != nil {
logger.Println(err)
}
}
}
}
}()
go func() {
// receive from stream
for {
select {
case <-ctx.Done():
return
default:
err := hc.checkOperation(operationChan)
if err != nil {
logger.Println("hc.checkUpdate failed :", err)
}
}
}
}()
hc.shutdownFunc = cancel
hc.exitChan = exitChan
return hc, nil
}
func (hc *houstonClient) Shutdown() {
hc.shutdownFunc()
}
func (hc *houstonClient) checkOperation(opChan chan<- *protos.OperationQueryResponse) error {
defer func() {
r := recover()
if r != nil {
logger.Error(r)
}
}()
op := protos.NewOperationClient(hc.client)
cl, err := op.Query(context.Background(), grpc.WaitForReady(true))
if err != nil {
return err
}
err = cl.Send(hc.makeOperationQueryRequest())
if err != nil {
cl.CloseSend()
return err
}
for {
update, err := cl.Recv()
if err != nil {
cl.CloseSend()
return err
}
opChan <- update
}
}
func (hc *houstonClient) SetReportMetrics(extra map[string]float32) {
atomic.StorePointer(&hc.extraMetrics, unsafe.Pointer(&extra))
}

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client/deploy.go Normal file
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package client
import (
"archive/tar"
"archive/zip"
"errors"
"fmt"
"go-ayo/common/logger"
"houston/shared"
"houston/shared/protos"
"io"
"io/fs"
"net/http"
"net/url"
"os"
"path"
"strings"
"golang.org/x/text/encoding/korean"
"golang.org/x/text/transform"
)
func download(dir string, urlpath string, accessToken string) (string, error) {
parsed, err := url.Parse(urlpath)
if err != nil {
return "", err
}
req, _ := http.NewRequest("GET", urlpath, nil)
if len(accessToken) > 0 {
req.Header.Add("Authorization", accessToken)
}
req.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/111.0.0.0 Safari/537.36 Edg/111.0.1661.51")
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("download failed : %d %s", resp.StatusCode, parsed.Path)
}
out, err := os.Create(path.Join(dir, path.Base(parsed.Path)))
if err != nil {
return "", err
}
defer out.Close()
_, err = io.Copy(out, resp.Body)
if err != nil {
return "", err
}
return out.Name(), nil
}
func unzip(fname string) error {
archive, err := zip.OpenReader(fname)
if err != nil {
os.Remove(fname)
return err
}
defer archive.Close()
verpath := path.Dir(fname)
for _, f := range archive.File {
var name string
if f.NonUTF8 {
name, _, _ = transform.String(korean.EUCKR.NewDecoder(), f.Name)
} else {
name = f.Name
}
filePath := path.Join(verpath, name)
if f.FileInfo().IsDir() {
os.MkdirAll(filePath, os.ModePerm)
continue
}
if err := os.MkdirAll(path.Dir(filePath), os.ModePerm); err != nil {
return err
}
dstFile, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, f.Mode())
if err != nil {
return err
}
fileInArchive, err := f.Open()
if err != nil {
return err
}
if _, err := io.Copy(dstFile, fileInArchive); err != nil {
return err
}
dstFile.Close()
fileInArchive.Close()
}
return nil
}
func untar(fname string) error {
file, err := os.Open(fname)
if err != nil {
return err
}
defer file.Close()
verpath := path.Dir(fname)
tarReader := tar.NewReader(file)
for {
header, err := tarReader.Next()
if err == io.EOF {
break
}
if err != nil {
return err
}
switch header.Typeflag {
case tar.TypeDir:
if err := os.MkdirAll(path.Join(verpath, header.Name), 0755); err != nil {
return err
}
case tar.TypeReg:
fileWriter, err := os.Create(path.Join(verpath, header.Name))
if err != nil {
return err
}
defer fileWriter.Close()
if _, err := io.Copy(fileWriter, tarReader); err != nil {
return err
}
default:
return errors.New("unknown type")
}
}
return nil
}
func (hc *houstonClient) prepareDeploy(name string, version string) (destPath string, err error) {
// houston관리용임을 표시하기 위해 더미파일 생성
defer func() {
var flagf *os.File
if _, err := os.Stat(path.Join(name, "@houston")); os.IsNotExist(err) {
flagf, err = os.Create(path.Join(name, "@houston"))
if err != nil {
return
}
defer flagf.Close()
flagf.Write([]byte(hc.timestamp))
}
}()
verpath := path.Join("./", name, version)
if _, err := os.Stat(verpath); os.IsNotExist(err) {
// 없네? 만들면 된다.
err = os.MkdirAll(verpath, fs.FileMode(os.O_WRONLY))
if err != nil {
return "", err
}
} else {
// 있네? 재배포 가능한가?
for _, child := range hc.childProcs {
if child.version == version && child.name == name {
// 이미 실행 중인 버전이다. 실패
return "", fmt.Errorf("%s %s is already running. deploy is failed", name, version)
}
}
// 재배포 가능
}
return verpath, nil
}
func (hc *houstonClient) deploy(req *shared.DeployRequest) error {
logger.Println("start deploying")
root, err := hc.prepareDeploy(req.Name, req.Version)
if err != nil {
return err
}
if !strings.HasPrefix(req.Url, "http") {
tks := strings.SplitN(hc.httpAddr, "://", 2)
req.Url = fmt.Sprintf("%s://%s", tks[0], path.Join(tks[1], req.Url))
}
logger.Println("start downloading", req.Url)
// verpath에 배포 시작
fname, err := download(root, req.Url, req.AccessToken)
if err != nil {
return err
}
switch path.Ext(fname) {
case ".zip":
err = unzip(fname)
case ".tar":
err = untar(fname)
}
return err
}
func (hc *houstonClient) withdraw(req *shared.WithdrawRequest) error {
fd, _ := os.Stat(path.Join("./", req.Name, req.Version))
if fd != nil {
if fd.IsDir() {
for _, running := range hc.childProcs {
if running.name == req.Name && running.version == req.Version {
// 회수하려는 버전이 돌고 있다
if running.state != protos.ProcessState_Stopped {
return fmt.Errorf("withdraw failed. %s@%s is still running", req.Name, req.Version)
}
}
}
return os.RemoveAll(path.Join("./", req.Name, req.Version))
}
}
return fmt.Errorf("withdraw failed. %s@%s is not deployed", req.Name, req.Version)
}

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client/operation.go Normal file
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package client
import (
"archive/zip"
"bytes"
"context"
"encoding/json"
"errors"
"fmt"
"go-ayo/common/logger"
"houston/shared"
"houston/shared/protos"
"io"
"net/http"
"os"
"os/exec"
"path"
"path/filepath"
"regexp"
"strconv"
"strings"
"sync/atomic"
"syscall"
"time"
)
type parsedVersionString = []string
func parseVersionString(ver string) parsedVersionString {
return strings.Split(ver, ".")
}
func lastExecutionArgs(verpath string) []string {
argf, err := os.Open(path.Join(verpath, "@args"))
if os.IsNotExist(err) {
argf, err = os.Open(path.Clean(path.Join(verpath, "..", "@args")))
if os.IsNotExist(err) {
return nil
}
}
defer argf.Close()
var out []string
dec := json.NewDecoder(argf)
dec.Decode(&out)
return out
}
func compareVersionString(lhs, rhs parsedVersionString) int {
minlen := len(lhs)
if minlen > len(rhs) {
minlen = len(rhs)
}
for i := 0; i < minlen; i++ {
if len(lhs[i]) < len(rhs[i]) {
return -1
}
if len(lhs[i]) > len(rhs[i]) {
return 1
}
if lhs[i] < rhs[i] {
return -1
}
if lhs[i] > rhs[i] {
return 1
}
}
return len(lhs) - len(rhs)
}
func findLastestVersion(root string) (string, error) {
// 최신 버전을 찾음
entries, err := os.ReadDir(root)
if err != nil {
return "", err
}
if len(entries) == 0 {
return "", nil
}
latest := parseVersionString(entries[0].Name())
for i := 1; i < len(entries); i++ {
next := parseVersionString(entries[i].Name())
if compareVersionString(latest, next) < 0 {
latest = next
}
}
return strings.Join(latest, "."), nil
}
func (meta *procmeta) launch(args []string, exitChan chan<- *exec.Cmd) error {
exepath := args[0]
verpath := path.Dir(exepath)
args[0] = path.Base(exepath)
cmd := exec.Command("./"+args[0], args[1:]...)
cmd.Dir = verpath
stdin, err := cmd.StdinPipe()
if err != nil {
return err
}
stdout, err := cmd.StdoutPipe()
if err != nil {
return err
}
stderr, err := cmd.StderrPipe()
if err != nil {
return err
}
err = os.MkdirAll(path.Join(cmd.Dir, "logs"), os.ModePerm)
if err != nil {
return err
}
now := time.Now().UTC()
ext := path.Ext(cmd.Args[0])
nameonly := path.Base(cmd.Args[0])
if len(ext) > 0 {
nameonly = nameonly[:len(nameonly)-len(ext)]
}
ts := now.Format("2006-01-02T15-04-05")
stdPrefix := path.Join(cmd.Dir, "logs", fmt.Sprintf("%s_%s", nameonly, ts))
errfile, err := os.Create(stdPrefix + ".stderr.log")
if err != nil {
return err
}
outfile, err := os.Create(stdPrefix + ".stdout.log")
if err != nil {
return err
}
go func() {
defer func() {
recover()
stdout.Close()
errfile.Close()
}()
buff := make([]byte, 1024)
for {
size, err := stderr.Read(buff)
if err != nil {
exitChan <- cmd
errfile.Close()
break
}
errfile.Write(buff[:size])
new := atomic.AddInt32(&meta.stderrSize, int32(size))
logger.Println("stderrSize :", new)
}
}()
go func() {
defer func() {
recover()
stderr.Close()
outfile.Close()
}()
buff := make([]byte, 1024)
for {
size, err := stdout.Read(buff)
if err != nil {
exitChan <- cmd
break
}
outfile.Write(buff[:size])
new := atomic.AddInt32(&meta.stdoutSize, int32(size))
logger.Println("stdoutSize :", new)
}
}()
err = cmd.Start()
if err != nil {
return err
}
meta.cmd = cmd
meta.stdin = stdin
meta.stdPrefix = stdPrefix
meta.state = protos.ProcessState_Running
return nil
}
func (hc *houstonClient) startChildProcess(req *shared.StartProcessRequest) error {
if req.Version == "latest" {
// 최신 버전을 찾음
latest, err := findLastestVersion(path.Join("./", req.Name))
if err != nil {
return err
}
req.Version = latest
}
meta := &procmeta{
name: req.Name,
version: req.Version,
state: protos.ProcessState_Error,
}
verpath := path.Join("./", req.Name, req.Version)
fi, err := os.Stat(verpath)
if err == nil && fi.IsDir() {
// Define regular expression
re := regexp.MustCompile(`[^\s"']+|"([^"]*)"|'([^']*)`)
// Split input string into array of strings
result := re.FindAllString(req.Args, -1)
for i := range result {
result[i] = strings.Trim(result[i], "\"'")
}
result[0] = path.Join(verpath, result[0])
err := meta.launch(result, hc.exitChan)
if err != nil {
return err
}
// launch가 성공하면 args 저장. this and parent folder
if argfile, err := os.Create(path.Join(req.Name, "@args")); err == nil {
enc := json.NewEncoder(argfile)
enc.Encode(result)
argfile.Close()
}
if argfile, err := os.Create(path.Join(verpath, "@args")); err == nil {
enc := json.NewEncoder(argfile)
enc.Encode(result)
argfile.Close()
}
hc.childProcs = append(hc.childProcs, meta)
op := protos.NewOperationClient(hc.client)
op.Refresh(context.Background(), hc.makeOperationQueryRequest())
return nil
}
return err
}
var errNoRunningProcess = errors.New("no running processed")
func (hc *houstonClient) stopChildProcess(req *shared.StopProcessRequest) error {
if req.Version == "latest" {
// 최신 버전을 찾음
latest, err := findLastestVersion(path.Join("./", req.Name))
if err != nil {
return err
}
req.Version = latest
}
var remains []*procmeta
var killing []*procmeta
for _, proc := range hc.childProcs {
if proc.state != protos.ProcessState_Running {
continue
}
if req.Pid != 0 {
if req.Pid == int32(proc.cmd.Process.Pid) {
// 해당 pid만 제거
killing = append(killing, proc)
} else {
remains = append(remains, proc)
}
} else if proc.name == req.Name {
if len(req.Version) == 0 {
// program 다 정지
killing = append(killing, proc)
} else if req.Version == proc.version {
// program의 특정 버전만 정지
killing = append(killing, proc)
} else {
// 해당 사항 없음
remains = append(remains, proc)
}
} else {
// 해당 사항 없음
remains = append(remains, proc)
}
}
if len(killing) > 0 {
for _, proc := range killing {
if err := proc.cmd.Process.Signal(syscall.SIGTERM); err != nil {
proc.cmd.Process.Signal(os.Kill)
proc.state = protos.ProcessState_Stopping
}
}
op := protos.NewOperationClient(hc.client)
op.Refresh(context.Background(), hc.makeOperationQueryRequest())
for _, proc := range killing {
proc.cmd.Wait()
}
hc.childProcs = remains
op.Refresh(context.Background(), hc.makeOperationQueryRequest())
return nil
}
return errNoRunningProcess
}
func (hc *houstonClient) restartChildProcess(req *shared.RestartProcessRequest) error {
if req.Version == "latest" {
// 최신 버전을 찾음
latest, err := findLastestVersion(path.Join("./", req.Name))
if err != nil {
return err
}
req.Version = latest
}
var restarts []*procmeta
for _, proc := range hc.childProcs {
if proc.name == req.Name {
if len(req.Version) == 0 {
restarts = append(restarts, proc)
} else if req.Version == proc.version {
restarts = append(restarts, proc)
}
}
}
if len(restarts) == 0 {
return errNoRunningProcess
}
for _, proc := range restarts {
if err := proc.cmd.Process.Signal(syscall.SIGTERM); err != nil {
proc.cmd.Process.Signal(os.Kill)
}
proc.state = protos.ProcessState_Stopping
}
op := protos.NewOperationClient(hc.client)
op.Refresh(context.Background(), hc.makeOperationQueryRequest())
for _, proc := range restarts {
proc.cmd.Wait()
proc.state = protos.ProcessState_Stopped
}
op.Refresh(context.Background(), hc.makeOperationQueryRequest())
for _, proc := range restarts {
args := proc.cmd.Args
args[0] = path.Join(proc.cmd.Dir, args[0])
if err := proc.launch(args, hc.exitChan); err != nil {
return err
}
}
op.Refresh(context.Background(), hc.makeOperationQueryRequest())
return nil
}
func (hc *houstonClient) uploadFiles(req *shared.UploadRequest) error {
if req.Version == "latest" {
// 최신 버전을 찾음
latest, err := findLastestVersion(path.Join("./", req.Name))
if err != nil {
return err
}
req.Version = latest
}
root := path.Join(req.Name, req.Version)
matches, err := filepath.Glob(path.Join(root, req.Filter))
if err != nil {
return err
}
if len(matches) == 0 {
resp, err := http.Post(req.Url, "application/zip", bytes.NewBuffer([]byte{}))
if err != nil {
return err
}
resp.Body.Close()
return nil
}
// Create a file to write the archive to.
f, err := os.CreateTemp("", "")
if err != nil {
return err
}
go func(f *os.File) {
defer func() {
tempname := f.Name()
f.Close()
resp, _ := http.Post(req.Url, "application/zip", f)
if resp != nil && resp.Body != nil {
resp.Body.Close()
}
os.Remove(tempname)
if del, err := strconv.ParseBool(req.DeleteAfterUploaded); del && err == nil {
for _, f := range matches {
os.Remove(f)
}
}
}()
// Create a new zip archive.
w := zip.NewWriter(f)
defer w.Close()
for _, file := range matches {
relative := file[len(root)+1:]
fw, err := w.Create(relative)
if err != nil {
logger.Error(err)
return
}
src, err := os.Open(file)
if err != nil {
logger.Error(err)
return
}
defer src.Close()
if _, err = io.Copy(fw, src); err != nil {
logger.Error(err)
return
}
}
}(f)
return nil
}