upstart-命令备忘

upstart script 关键字:

1. exec: 执行命令, 在script块中使用
    exec /usr/bin/zip -v

2. script: 脚本块，包括主运行脚本
       script
           exec /usr/bin/zip /root/upstart.zip /root/upstart/txt
       end script

3. pre-start: 脚本块, 在主运行脚本之前执行的脚本
    pre-start script
        exec rm /root/upstart.txt
        exec echo pre-start >> /root/upstart.txt
    end script

4. post-start: 脚本块, 在主运行脚本之后, running状态之前
    post-start script
        exec echo post-start>> /root/upstart.txt
    end script

5. pre-stop: 脚本块, 在执行stop之前
    pre-stop script
        exec echo pre-stop >> /root/upstart.txt
    end script

6. post-stop: 脚本块, 在主运行脚本被杀死之后
    post-stop script
        exex echo post-stop >> /root/upstart.txt
    end script

7. start on: 事件, 启动任务
    start on startup

8. stop on: 事件, 停止任务
    stop on shutdown

9. description: 描述, 信息提示
    desription "This is a upstart testing"

10. author: 描述, 作者信息
    author "liupeng <pengswift.github.io>"

11. version: 描述, 版本信息
    version "0.0.1 dev"

12. respawn: 命令, 设置服务异常停止后自动重启
    respawn

13. respawn limit: 命令, 设置服务异常停止后重启次数及间隔时间
    respawn limit 15 3

14. instance: 定义实例名字, 可以通过命令給任务传参数
    instance $TTY
    exec /sbin/getty -8 38300 $TTY

    #通过命令传参数
    ~ start mytest $TTY=tty1

15. kill timeout: 命令, 在达到指定时间后, 停止应用
    kill timeout 5

16. normal exit: 命令, 正常退出，不会被respawn重启
    normal exit 0 TERM

17. env: 变量, 设置任务的环境变量
    env PIDFILE=/var/run/myprocess.pid

18. umask: 变量，设置任务的文件权限掩码
    umask 0755

19. nice: 变量， 设置任务的调度优先级
    nice -5

20. limit: 变量， 设置任务的资源限制
    limit nproc 10 10

21. chroot: 变量, 设置任务的根目录
    chroot /var/lib/www/jail

22. chdir: 变量, 设置任务的工作目录
    chdir /var/tmp

upstart 命令

1. 查看版本
    ~ initctl version
    init (upstart 1.12.1)

2. 查看mytest应用状态
    ~ initctl list | grep mytest

    ~ status mytest

3. 启动mytest应用
    ~ initctl start mytest

    ~ start mytest

4. 停止mytest应用
    ~ initctl stop mytest

    ~ stop mytest

upstart封装mytest

~ vi /etc/init/mytest.conf

description "mytest"
author "bsspirit <http://blog.fens.me>"

env var=bar
export var

start on startup
stop on shutdown

respawn
respawn limit 2 5

console output

pre-start script
    logger "pre-start: before: var=$var"
    var=pre-start
    export var
    logger "pre-start: after: var=$var"
end script

post-start script
    logger "post-start: before: var=$var"
    var=post-start
    export var
    logger "post-start: after: var=$var"
end script

script
    logger "script: before: var=$var"
    var=main
    export var
    sleep 60000
    logger "script: after: var=$var"
end script

post-stop script
    logger "post-stop: before: var=$var"
    var=post-stop
    export var
    logger "post-stop: after: var=$var"
end script




测试mytest程序:

启动mytest任务
    ~ start mytest
    mytest start/running, process 3257

查看日志跟踪运行状态
    ~ tail -f /var/log/syslog

    Jun 14 20:41:13 liupeng-VirtualBox logger: pre-start: before: var=bar
    Jun 14 20:41:13 liupeng-VirtualBox logger: pre-start: after: var=pre-start
    Jun 14 20:41:13 liupeng-VirtualBox logger: script: before: var=bar
    Jun 14 20:41:13 liupeng-VirtualBox logger: post-start: before: var=bar
    Jun 14 20:41:13 liupeng-VirtualBox logger: post-start: after: var=post-start

查看mytest任务状态
    ~ status mytest
    mytest start/running, process 3257

查看系统进程，因为在程序中用sleep停止，要通过sleep查询
    ~ ps -aux|grep sleep
    root     3220  0.0  0.0   2176   276 ?        S    20:40   0:00 sleep 60000

杀掉sleep进程，mytest自动重启
    kill -9 3220

停止mytest
    stop mytest
    mytest stop/waiting

通过命令传参数，启动mytest
start mytest var=liupeng