shell 实战 -- 基于一个服务启动，关闭，状态检查的脚本

功能说明：

• check：检查服务状态，在开启，关闭，状态检查时都会用到这个函数，所以封装起来放到最前面
• start：开启服务
• stop：关闭服务
• fstop：强制关闭
• status：检查服务状态
• running：查看所有正在运行的状态

使用说明：

开启服务：

启动一个进程监听 9000（默认）端口：

• sh standard_server.sh start

启动一个进程监听 8000（自定义）端口：

• 格式: sh standard_server.sh start ipaddress port
• sh standard_server.sh start 10.10.4.200 8000

关闭服务：

关闭监听 9000（默认）端口：

• sh standard_server.sh stop

关闭监听 8000（自定义）端口：

• 格式: sh standard_server.sh stop ipaddress port
• sh standard_server.sh stop 10.10.4.200 8000

查看监听状态：

查看 9000 端口（默认）监听状态：

• sh standard_server.sh status

查看 8000端口（自定义）监听状态：

• 格式: sh standard_server.sh status ipaddress port
• sh standard_server.sh status 10.10.4.200 8000

查看所有正在监听端口：

• sh standard_server.sh running

代码部分：

#!/bin/bash
# author: ck

check()
{
    if (($(ps aux|grep manage.py| grep "${port:-9000}" |grep -v grep|wc -l) == 0));then
        # stopped
        return 1;
    else
        # running
        return 0;
    fi
}

start()
{
    check
    if (($? == 1));then
        echo -n "standard server ${port:-9000} to start......"
        path=$(dirname $0)
        if [[ $path != '.' ]];then
            cd $path
        fi
        # nohup /home/seemmo/share/python/centos/python3.6.6/bin/python3 manage.py start_server -h "${host:-0.0.0.0}" -p "${port:-9000}" -k wf >nohup.out 2>&1 &
        nohup python3 manage.py start_server -h "${host:-0.0.0.0}" -p "${port:-9000}" -k wf >nohup.out 2>&1 &
        while true
        do
            check
            if (($? == 1));then
                echo -n '...'
                sleep 1
            else
                echo -e '\033[32mstarted\033[1m\033[0m'
                break
            fi
        done
    else
        echo "standard server ${port:-9000} has been running!!!"
    fi
}

fstop()
{
    check
    if (($? == 1));then
        echo "standard server ${port:-9000} has been stopped!!!"
    else
        echo -n "standard server ${port:-9000} force to stop....."
        ps aux|grep manage.py |grep "${port:-9000}" |grep -v grep|awk '{print $2}'|xargs kill -9
        while true
        do
            check
            if (($? == 1));then
                echo -e '\033[32mstopped\033[1m\033[0m'
                break
            else
                echo -n '...'
                sleep 1
            fi
        done
    fi
}

stop()
{
    check
    if (($? == 1));then
        echo "standard server ${port:-9000} has been stopped!!!"
    else
        echo -n "standard server ${port:-9000} to stop....."
        spid=1
        tp_list=($(ps aux|grep manage.py |grep "${port:-9000}" |grep -v grep|awk '{print $2}'|xargs))
        for tpid in ${tp_list[@]}
        do
            if ((spid == 1));then
                spid=$tpid
            elif ((tpid < spid));then
                spid=$tpid
            fi
        done
        kill -15 $spid
        retry_time=3
        while true
        do
            if ((retry_time == 0));then
                echo
                fstop
                break
            fi
            check
            if (($? == 1));then
                echo -e '\033[32mstopped\033[1m\033[0m'
                break
            else
                ((retry_time=retry_time-1))
                echo -n '.'
                sleep 1
            fi
        done
    fi
}

status()
{
    check
    if (($? == 1));then
        echo -e "standard server ${port:-9000} now is \033[32mstopped\033[1m\033[0m"
    else
        echo -e "standard server ${port:-9000} now is \033[32mrunning\033[1m\033[0m"
    fi
}

running()
{
    port_list=$(ps aux | grep "manage.py" | grep -v "grep" |awk '{print $17}' |xargs)
    for port in ${port_list}
    do
        echo -e "standard server ${port} now is \033[32mrunning\033[1m\033[0m"
    done
}

restart() {
    check
    if (($? == 1));then
        start
    else
        stop
        while true
        do
            check
            if (($? == 1));then
                start
                break
            else
                sleep 1
            fi
        done
    fi
}

if (($# == 1)) || (($# == 3));then
    if (($# == 3));then
        host=$2
        port=$3
    fi

    case $1 in
        start|stop|status|restart|fstop|running)
            $1
            ;;
        *)
            if (($# == 1));then
                echo "Usage: bash $0 {start|stop|status|restart|fstop|running}"
                exit 2
            else
                echo "Usage: bash $0 {start|stop|status|restart|fstop|running} host port"
                exit 2
            fi
    esac

else
    echo "Usage: bash $0 {start|stop|status|restart|fstop|running} host port"
    exit 2
fi

ending ~