daemontools管理前台服务：自动失败重启，获取程序日志

快来打我* 2022-11-18 13:47 144阅读 0赞

### 文章目录 ###

*  1，编译安装
 *  2，基本使用
 *  3，测试：前台运行的服务

*  自定义后台服务简单脚本（监控失败并重启) : [https://blog.csdn.net/eyeofeagle/article/details/94485522][https_blog.csdn.net_eyeofeagle_article_details_94485522]
 *  daemontools功能介绍  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70]

# 1，编译安装 #

源码下载：[http://cr.yp.to/daemontools/install.html][http_cr.yp.to_daemontools_install.html]  
编译好的二进制包下载 （提取码：abcd）：[https://pan.baidu.com/s/1v3BfNn-mOPytM5\_k4A3FSQ ][https_pan.baidu.com_s_1v3BfNn-mOPytM5_k4A3FSQ]

*  解压后，package/install 运行报错，需要添加如下配置：[参考 https://blog.csdn.net/qq\_26707177/article/details/83988970][https_blog.csdn.net_qq_26707177_article_details_83988970]  
    ![在这里插入图片描述][20210413144501125.png]
 *  开机启动服务：`echo '/command/svscanboot &' >> /etc/rc.local ; chmod +x /etc/rc.local`
 *  run 脚本文件：需要可执行权限，格式必须规范( 以 `#!/bin/bash`开头)

#安装后的目录结构(/service, /command --> /opt/admin/daemontools/command/)
    # mkdir /service; chmod 1755 /service; chmod 1755 /service
    # ln -sf /opt/admin/daemontools/command/ /command; ln -sf /command/* /usr/local/bin/
    
    [root@c7-docker ~]# ls /opt/admin/ -l
    total 4
    lrwxrwxrwx. 1 root root   16 Apr  6 18:39 daemontools -> daemontools-0.76
    drwxr-xr-x. 6 root root 4096 Mar 25 10:29 daemontools-0.76
    [root@c7-docker ~]# ls /opt/admin/daemontools
    command  compile  package  src
    [root@c7-docker ~]# ls /opt/admin/daemontools/command/
    envdir     fghack    pgrphack       setlock    softlimit  svc   svscan      svstat  tai64nlocal
    envuidgid  multilog  readproctitle  setuidgid  supervise  svok  svscanboot  tai64n
    [root@c7-docker ~]# ls /command -l
    lrwxrwxrwx. 1 root root 31 Apr  6 18:55 /command -> /opt/admin/daemontools/command/
    
    
    #环境变量-链接
    [root@c7-docker ~]# which svc
    /usr/local/bin/svc
    [root@c7-docker ~]# ll /usr/local/bin/svc
    lrwxrwxrwx. 1 root root 12 Apr  6 19:05 /usr/local/bin/svc -> /command/svc
    [root@c7-docker ~]# ll /usr/local/bin/svscanboot
    lrwxrwxrwx. 1 root root 19 Apr  6 19:05 /usr/local/bin/svscanboot -> /command/svscanboot

# 2，基本使用 #

#---1，管理服务：停止，重启
    #Easy, reliable signalling. With /service, the system administrator can use svc to control your daemon. For example:
    svc -o /service/yourdaemon: runs the service once
    #重启服务
    svc -t /service/yourdaemon: sends TERM, and automatically restarts the daemon after it dies
    #停止服务
    svc -h /service/yourdaemon: sends HUP
    svc -d /service/yourdaemon: sends TERM, and leaves the service down
    #启动服务
    svc -u /service/yourdaemon: brings the service back up
    
    
    #---2，状态查看
    [root@c7-docker ~]# svstat /service/test1
    /service/test1: up (pid 17014) 0 seconds
    
    [root@c7-docker ~]# ps -ef |grep svs
    root       791     1  0 08:44 ?        00:00:00 /bin/sh /command/svscanboot
    root       795   791  0 08:44 ?        00:00:00 svscan /service
    root     17305  1559  0 09:19 pts/0    00:00:00 grep --color=auto svs
    
    #查看管理的服务和 pid号
    [root@c7-docker ~]# pstree -a -p 791
    svscanboot,791 /command/svscanboot
      ├─readproctitle,796 service errors:...
      └─svscan,795 /service
          └─supervise,805 test1
              └─(date,17430)
    
    
    #---3，修改被管理的服务： How do I upgrade a service directory? I need to change ./run.
    Create ./run.new and atomically rename ./run.new to ./run. Then use
         svc -t .
    to send a TERM signal to the daemon. supervise will start the new ./run after the daemon exits.

# 3，测试：前台运行的服务 #

#配置服务(前台允许的，不是后台运行)，并获取日志
    ####### 1，启动服务
    [root@c7-docker ~]# cat /service/aaa/run
    #!/bin/bash
    #exec 2>&1
    #exec envuidgid user1 envdir ./env softlimit -d300000 command.....
    exec date
    [root@c7-docker ~]# svc -u /service/aaa/
    
    
    
    ####### 2，启动日志获取 (需要手动创建 log/main日志目录)
    [root@c7-docker ~]# cat /service/aaa/log/run
    #!/bin/bash
    #exec setuidgid user1 multilog t ./main
    exec multilog t ./main
    [root@c7-docker ~]# mkdir -p /service/aaa/log/main/
    [root@c7-docker ~]# svc -u /service/aaa/log/
    # 查看程序运行日志
    [root@c7-docker ~]# tail -n2 /service/aaa/log/main/
    @4000000060750f7529f9b84c.u  current                      lock                         state
    [root@c7-docker ~]# tail -n2 /service/aaa/log/main/current
    @40000000607539a23840ac44 Tue Apr 13 14:26:32 CST 2021
    @40000000607539a33aa2c7c4 Tue Apr 13 14:26:33 CST 2021
    
    
    
    ####### 3，配置自动管理tomcat重启
    [root@c7-docker opt]# cat /service/tomcat/run
    #!/bin/bash
    exec 2>&1
    #exec setuidgid vagrant whoami
    #exec setuidgid vagrant java -jar /opt/com.example.demo-0.0.1-SNAPSHOT.jar
    exec setuidgid  vagrant /opt/apache-tomcat-8.5.54/bin/catalina.sh run
    [root@c7-docker opt]# cat /service/tomcat/log/run
    #!/bin/bash
    #exec setuidgid vagrant multilog t ./main
    exec setuidgid vagrant multilog  ./main
    [root@c7-docker ~]# mkdir -p /service/tomcat/log/main ; chown -R vagrant /service/tomcat/log/
    [root@c7-docker ~]# svc -u /service/tomcat
    [root@c7-docker ~]# svc -u /service/tomcat/log/
    
    
    ####### 4，查看进程状态
    [root@test-c62 opt]# ps -ef |grep svs
    root      7176 17071  0 19:28 pts/0    00:00:00 /bin/sh /usr/local/bin/svscanboot
    root      7178  7176  0 19:28 pts/0    00:00:00 svscan /service
    root     18329 17071  0 19:50 pts/0    00:00:00 grep svs
    [root@c7-docker opt]# pstree -ap 7176
    svscanboot,7176 /usr/local/bin/svscanboot
      ├─readproctitle,7179 service errors:...
      └─svscan,7178 /service
          ├─supervise,7180 aaa
          │   └─(date,18330)
          ├─supervise,7181 log
          │   └─multilog,7185 t ./main
          ├─supervise,7182 tomcat
          │   └─java,18131 -Djava.util.logging.config.file=/opt/apache-tomcat-8.5.54/conf/logging.properties...
          │       ├─{ java},18142
          │       ├─{ java},18143
          │       ├─{ java},18158
          │       └─{ java},18160
          └─supervise,7183 log
              └─multilog,11207 ./main

[https_blog.csdn.net_eyeofeagle_article_details_94485522]: https://blog.csdn.net/eyeofeagle/article/details/94485522
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2V5ZW9mZWFnbGU_size_16_color_FFFFFF_t_70]: /images/20221022/46d0c7abe0874c2c86cbc755702447cb.png
[http_cr.yp.to_daemontools_install.html]: http://cr.yp.to/daemontools/install.html
[https_pan.baidu.com_s_1v3BfNn-mOPytM5_k4A3FSQ]: https://pan.baidu.com/s/1v3BfNn-mOPytM5_k4A3FSQ
[https_blog.csdn.net_qq_26707177_article_details_83988970]: https://blog.csdn.net/qq_26707177/article/details/83988970
[20210413144501125.png]: /images/20221022/84df7e530de042abb7c886c97ca759ad.png