Format and remove 12.3.md spaces
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vCaesar
250
zh/12.3.md
250
zh/12.3.md
@@ -9,104 +9,104 @@
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```Go
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d := flag.Bool("d", false, "Whether or not to launch in the background(like a daemon)")
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if *d {
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cmd := exec.Command(os.Args[0],
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"-close-fds",
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"-addr", *addr,
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"-call", *call,
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)
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serr, err := cmd.StderrPipe()
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if err != nil {
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log.Fatalln(err)
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}
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err = cmd.Start()
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if err != nil {
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log.Fatalln(err)
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}
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s, err := ioutil.ReadAll(serr)
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s = bytes.TrimSpace(s)
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if bytes.HasPrefix(s, []byte("addr: ")) {
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fmt.Println(string(s))
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cmd.Process.Release()
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} else {
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log.Printf("unexpected response from MarGo: `%s` error: `%v`\n", s, err)
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cmd.Process.Kill()
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}
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d := flag.Bool("d", false, "Whether or not to launch in the background(like a daemon)")
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if *d {
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cmd := exec.Command(os.Args[0],
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"-close-fds",
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"-addr", *addr,
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"-call", *call,
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)
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serr, err := cmd.StderrPipe()
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if err != nil {
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log.Fatalln(err)
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}
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err = cmd.Start()
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if err != nil {
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log.Fatalln(err)
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}
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s, err := ioutil.ReadAll(serr)
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s = bytes.TrimSpace(s)
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if bytes.HasPrefix(s, []byte("addr: ")) {
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fmt.Println(string(s))
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cmd.Process.Release()
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} else {
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log.Printf("unexpected response from MarGo: `%s` error: `%v`\n", s, err)
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cmd.Process.Kill()
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}
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}
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```
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- 另一种是利用syscall的方案，但是这个方案并不完善：
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```Go
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package main
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import (
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"log"
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"os"
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"syscall"
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)
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func daemon(nochdir, noclose int) int {
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var ret, ret2 uintptr
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var err uintptr
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darwin := syscall.OS == "darwin"
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// already a daemon
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if syscall.Getppid() == 1 {
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return 0
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}
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// fork off the parent process
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ret, ret2, err = syscall.RawSyscall(syscall.SYS_FORK, 0, 0, 0)
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if err != 0 {
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return -1
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}
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// failure
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if ret2 < 0 {
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os.Exit(-1)
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}
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// handle exception for darwin
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if darwin && ret2 == 1 {
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ret = 0
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}
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// if we got a good PID, then we call exit the parent process.
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if ret > 0 {
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os.Exit(0)
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}
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/* Change the file mode mask */
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_ = syscall.Umask(0)
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// create a new SID for the child process
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s_ret, s_errno := syscall.Setsid()
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if s_errno != 0 {
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log.Printf("Error: syscall.Setsid errno: %d", s_errno)
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}
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if s_ret < 0 {
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return -1
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}
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if nochdir == 0 {
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os.Chdir("/")
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}
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if noclose == 0 {
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f, e := os.OpenFile("/dev/null", os.O_RDWR, 0)
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if e == nil {
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fd := f.Fd()
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syscall.Dup2(fd, os.Stdin.Fd())
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syscall.Dup2(fd, os.Stdout.Fd())
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syscall.Dup2(fd, os.Stderr.Fd())
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}
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}
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package main
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import (
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"log"
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"os"
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"syscall"
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)
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func daemon(nochdir, noclose int) int {
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var ret, ret2 uintptr
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var err uintptr
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darwin := syscall.OS == "darwin"
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// already a daemon
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if syscall.Getppid() == 1 {
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return 0
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}
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}
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// fork off the parent process
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ret, ret2, err = syscall.RawSyscall(syscall.SYS_FORK, 0, 0, 0)
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if err != 0 {
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return -1
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}
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// failure
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if ret2 < 0 {
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os.Exit(-1)
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}
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// handle exception for darwin
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if darwin && ret2 == 1 {
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ret = 0
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}
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// if we got a good PID, then we call exit the parent process.
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if ret > 0 {
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os.Exit(0)
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}
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/* Change the file mode mask */
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_ = syscall.Umask(0)
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// create a new SID for the child process
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s_ret, s_errno := syscall.Setsid()
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if s_errno != 0 {
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log.Printf("Error: syscall.Setsid errno: %d", s_errno)
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}
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if s_ret < 0 {
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return -1
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}
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if nochdir == 0 {
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os.Chdir("/")
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}
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if noclose == 0 {
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f, e := os.OpenFile("/dev/null", os.O_RDWR, 0)
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if e == nil {
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fd := f.Fd()
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syscall.Dup2(fd, os.Stdin.Fd())
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syscall.Dup2(fd, os.Stdout.Fd())
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syscall.Dup2(fd, os.Stderr.Fd())
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}
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}
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return 0
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}
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```
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上面提出了两种实现Go的daemon方案，但是我还是不推荐大家这样去实现，因为官方还没有正式的宣布支持daemon，当然第一种方案目前来看是比较可行的，而且目前开源库skynet也在采用这个方案做daemon。
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@@ -128,45 +128,45 @@ Supervisord默认的配置文件路径为/etc/supervisord.conf，通过文本编
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```conf
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;/etc/supervisord.conf
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[unix_http_server]
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file = /var/run/supervisord.sock
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chmod = 0777
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chown= root:root
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;/etc/supervisord.conf
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[unix_http_server]
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file = /var/run/supervisord.sock
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chmod = 0777
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chown= root:root
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[inet_http_server]
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# Web管理界面设定
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port=9001
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username = admin
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password = yourpassword
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[inet_http_server]
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# Web管理界面设定
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port=9001
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username = admin
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password = yourpassword
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[supervisorctl]
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; 必须和'unix_http_server'里面的设定匹配
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serverurl = unix:///var/run/supervisord.sock
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[supervisorctl]
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; 必须和'unix_http_server'里面的设定匹配
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serverurl = unix:///var/run/supervisord.sock
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[supervisord]
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logfile=/var/log/supervisord/supervisord.log ; (main log file;default $CWD/supervisord.log)
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logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB)
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logfile_backups=10 ; (num of main logfile rotation backups;default 10)
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loglevel=info ; (log level;default info; others: debug,warn,trace)
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pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
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nodaemon=true ; (start in foreground if true;default false)
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minfds=1024 ; (min. avail startup file descriptors;default 1024)
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minprocs=200 ; (min. avail process descriptors;default 200)
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user=root ; (default is current user, required if root)
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childlogdir=/var/log/supervisord/ ; ('AUTO' child log dir, default $TEMP)
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[supervisord]
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logfile=/var/log/supervisord/supervisord.log ; (main log file;default $CWD/supervisord.log)
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logfile_maxbytes=50MB ; (max main logfile bytes b4 rotation;default 50MB)
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logfile_backups=10 ; (num of main logfile rotation backups;default 10)
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loglevel=info ; (log level;default info; others: debug,warn,trace)
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pidfile=/var/run/supervisord.pid ; (supervisord pidfile;default supervisord.pid)
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nodaemon=true ; (start in foreground if true;default false)
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minfds=1024 ; (min. avail startup file descriptors;default 1024)
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minprocs=200 ; (min. avail process descriptors;default 200)
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user=root ; (default is current user, required if root)
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childlogdir=/var/log/supervisord/ ; ('AUTO' child log dir, default $TEMP)
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[rpcinterface:supervisor]
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supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
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[rpcinterface:supervisor]
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supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface
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; 管理的单个进程的配置，可以添加多个program
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[program:blogdemon]
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command=/data/blog/blogdemon
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autostart = true
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startsecs = 5
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user = root
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redirect_stderr = true
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stdout_logfile = /var/log/supervisord/blogdemon.log
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; 管理的单个进程的配置，可以添加多个program
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[program:blogdemon]
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command=/data/blog/blogdemon
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autostart = true
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startsecs = 5
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user = root
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redirect_stderr = true
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stdout_logfile = /var/log/supervisord/blogdemon.log
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```
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### Supervisord管理
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