codeskyblue
8 years ago
parent
88d6cfd008
commit
4c60901c65
@ -0,0 +1,14 @@
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package config
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import (
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"os"
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"path/filepath"
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)
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var (
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GOSUV_HOME = os.ExpandEnv("$HOME/.gosuv")
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GOSUV_SOCK_PATH = filepath.Join(GOSUV_HOME, "gosuv.sock")
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GOSUV_CONFIG = filepath.Join(GOSUV_HOME, "gosuv.json")
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GOSUV_PROGRAM_CONFIG = filepath.Join(GOSUV_HOME, "programs.json")
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CMDPLUGIN_DIR = filepath.Join(GOSUV_HOME, "cmdplugin")
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)
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@ -0,0 +1,178 @@
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package program
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import (
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"io"
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"os"
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"path/filepath"
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"sync"
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"syscall"
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"time"
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. "github.com/codeskyblue/gosuv/config"
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. "github.com/codeskyblue/gosuv/utils"
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"github.com/codeskyblue/kexec"
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"github.com/qiniu/log"
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)
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const (
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ST_RUNNING = "RUNNING"
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ST_STOPPED = "STOPPED"
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ST_FATAL = "FATAL"
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ST_RETRYWAIT = "RETRYWAIT" // some like python-supervisor EXITED
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)
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type Event int
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const (
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EVENT_START = Event(iota)
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EVENT_STOP
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)
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type ProgramInfo struct {
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Name string `json:"name"`
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Command []string `json:"command"`
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Environ []string `json:"environ"`
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Dir string `json:"directory"`
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AutoStart bool `json:"autostart"` // change to *bool, which support unexpected
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StartRetries int `json:"startretries"`
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StartSeconds int `json:"startsecs"`
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LogDir string `json:"logdir"`
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}
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func (p *ProgramInfo) buildCmd() *kexec.KCommand {
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cmd := kexec.Command(p.Command[0], p.Command[1:]...)
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cmd.Dir = p.Dir
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cmd.Env = append(os.Environ(), p.Environ...)
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return cmd
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}
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type Program struct {
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*kexec.KCommand `json:"-"`
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Status string `json:"state"`
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Sig chan os.Signal `json:"-"`
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Info *ProgramInfo `json:"info"`
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mu sync.Mutex
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retry int
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stopC chan bool
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}
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func NewProgram(info *ProgramInfo) *Program {
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// set default values
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if info.StartRetries == 0 {
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info.StartRetries = 3
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}
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if info.StartSeconds == 0 {
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info.StartSeconds = 3
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}
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return &Program{
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Status: ST_STOPPED,
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Sig: make(chan os.Signal),
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Info: info,
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stopC: make(chan bool),
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}
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}
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// TODO: status change hook
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func (p *Program) setStatus(st string) {
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p.Status = st
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}
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// STOP and START Should not run parallel
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func (p *Program) InputData(event Event) {
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p.mu.Lock()
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defer p.mu.Unlock()
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switch event {
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case EVENT_START:
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if p.Status == ST_STOPPED || p.Status == ST_FATAL {
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go p.RunWithRetry()
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}
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case EVENT_STOP:
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if p.Status == ST_RUNNING || p.Status == ST_RETRYWAIT {
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p.stop()
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}
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}
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}
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func (p *Program) createLog() (*os.File, error) {
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logDir := filepath.Join(p.Info.LogDir, "logs")
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os.MkdirAll(logDir, 0755) // just do it, err ignore it
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logFile := p.LogFilePath()
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return os.OpenFile(logFile, os.O_RDWR|os.O_CREATE|os.O_APPEND, 0644)
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}
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func (p *Program) LogFilePath() string {
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logDir := p.Info.LogDir
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if logDir == "" {
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logDir = filepath.Join(GOSUV_HOME, "logs")
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}
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return filepath.Join(logDir, p.Info.Name+".log")
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}
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func (p *Program) RunWithRetry() {
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for p.retry = 0; p.retry < p.Info.StartRetries+1; p.retry += 1 {
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// wait program to exit
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errc := GoFunc(p.run)
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var err error
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PROGRAM_WAIT:
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// Here is RUNNING State
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select {
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case err = <-errc:
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log.Info(p.Info.Name, err)
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case <-time.After(time.Second * time.Duration(p.Info.StartSeconds)): // reset retry
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p.retry = 0
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goto PROGRAM_WAIT
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case <-p.stopC:
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return
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}
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// Enter RETRY_WAIT State
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if p.retry < p.Info.StartRetries {
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p.setStatus(ST_RETRYWAIT)
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select {
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case <-p.stopC:
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return
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case <-time.After(time.Second * 2):
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}
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}
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}
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p.setStatus(ST_FATAL)
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}
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func (p *Program) start() error {
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p.KCommand = p.Info.buildCmd()
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logFd, err := p.createLog()
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if err != nil {
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return err
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}
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p.Cmd.Stdout = logFd
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p.Cmd.Stderr = logFd
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return p.Cmd.Start()
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}
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func (p *Program) run() (err error) {
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if err = p.start(); err != nil {
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return
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}
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p.setStatus(ST_RUNNING)
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defer func() {
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if out, ok := p.Cmd.Stdout.(io.Closer); ok {
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out.Close()
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}
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log.Warnf("program finish: %v", err)
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}()
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err = p.Wait()
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return
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}
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func (p *Program) stop() error {
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select {
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case p.stopC <- true: // stopC may not recevied, when in FATAL, in a very low probality
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case <-time.After(time.Millisecond * 200): // 0.2s
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}
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p.Terminate(syscall.SIGKILL)
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p.setStatus(ST_STOPPED)
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return nil
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}
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@ -0,0 +1,7 @@
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package program
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import "testing"
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func TestProgramCreate(t *testing.T) {
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}
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@ -0,0 +1,33 @@
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package utils
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import (
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"errors"
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"time"
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"github.com/qiniu/log"
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)
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var ErrGoTimeout = errors.New("GoTimeoutFunc")
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func GoFunc(f func() error) chan error {
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ch := make(chan error)
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go func() {
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ch <- f()
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}()
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return ch
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}
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func GoTimeoutFunc(timeout time.Duration, f func() error) chan error {
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ch := make(chan error)
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go func() {
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var err error
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select {
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case err = <-GoFunc(f):
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ch <- err
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case <-time.After(timeout):
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log.Debugf("timeout: %v", f)
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ch <- ErrGoTimeout
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}
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}()
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return ch
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}
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