Shell之脚本功能概述

需求描述:

实现一个脚本工具，该脚本提供类似supervisor功能，可以对进程进行管理;
一键查看所有进程运行状态
单个或批量启动进程，单个或批量停止进程
提供进程分组功能，可以按组查看进行运行状态，可以按组启动或停止该组内所有进程

脚本拆分–函数

function get_all_process 返回“http nginx mysql datanode” 进程名称字符串
function get_all_group 返回组进程名称
function get_process_info 返回进程详细信息字符串详细信息包括：运行状态、PID、CPU、MEM、启动时间
注：该函数可以接受一个参数，参数为进程名称
分解：
```
function get_process_pid_by_name process
function get_process_ny_pid process_id
```
function get_all_process_by_group 返回进程组内所有进名称列表字符串
如 DB组->”mysql postgresql oracle”
funcction get_group_by_pn 根据进程名称获取组名
判断函数 is_group_in_config/is_process_in_config

注意：
^$表示以空行开始
$# 参数的个数
$$ 表示子进程id
$0 表示进程本身
shift命令左移，如果调用函数或运行脚本时，参数丢掉第一个

实现

status-app.sh


#!/bin/bash
# 
# Function: show group data

HOME_DIR="/opt/datasets/shell/demo01"
CONFIG_FILE="process.cfg"


function get_all_group
{
	glist=$(sed -n '/\[GROUP_LIST\]/,/\[.*\]/p' $HOME_DIR/$CONFIG_FILE | egrep -v '(^$|\[.*\])')
	echo $glist
	
}
# echo `get_all_group`
function get_all_process
{

	for g in `get_all_group`
	do
		plist=$(sed -n "/\[$g\]/,/\[.*\]/p" $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])")
		echo $plist
	done
}

function get_process_pid_by_name
{
	if [ $# -ne 1 ];then
		return 1
	else
		pids=`ps -ef | grep $1 | grep -v $0 | grep -v grep | awk '{print $2}'
		echo $pids`
	fi

}

function get_process_info_by_pid
{
	if [ `ps -ef | awk -v pid=$1 '$2==pid{print }' | wc -l` -eq 1  ];then
		process_status="STARTED"
	else 
		process_status="STOPPEND"
	fi
	
	process_cpu=`ps -aux | awk -v pid=$1 '$2==pid{print $3}'`
	process_mem=`ps -aux | awk -v pid=$1 '$2==pid{print $4}'`
	pro_start_time=`ps -p $1 -o lstart | grep -v STARTED`
}

function is_group_in_config
{
	for gn in `get_all_group`
	do
		if [ $gn == $1 ];then
			return
		fi
	done
	return 1
}

function get_all_process_by_group
{
	is_group_in_config $1
	if [ $? -eq 1 ];then
		echo "GroupName $1 is not in config..."
	fi

	p_list=$(sed -n "/\[$1\]/,/\[.*\]/p" $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])")
	echo $p_list
}
# get_process_pid_by_name $1

# echo $pids

# get_process_info_by_pid 1380

# echo "$process_status $process_cpu $process_mem $pro_start_time"

if [ ! -e $CONFIG_FILE ]; then
        echo "$CONFIG_FILE not foud!"
 	exit 1
fi

get_all_process_by_group DB
# 
# 
# for g in `get_all_process`
# do
# 	echo $g
# done

程序设计主流程

app-status.sh 执行有三种情况
    1 无参数            列出配置文件中所有进程的运行信息
    2 -g GroupName      列出GroupName组内的所有进程
    3 process_name1     列出指定进程的运行信息

s测试

sed -n '//,//p' | egrep -v '^$ || \[.*\]'

[root@node1 ~]# ps -aux | grep mysql
mysql      1380  0.2  5.3 1280344 207416 ?      Sl   15:06   0:26 /usr/sbin/mysqld --daemonize --pid-file=/var/run/mysqld/mysqld.pid
root       4453  0.0  0.0 112728   996 pts/3    S+   18:27   0:00 grep --color=auto mysql
[root@node1 ~]# ps -p 1380 -o lstart 
                 STARTED
Sat Jan 11 15:06:23 2020

完整代码

#!/bin/bash
# 
# Function: show group data

HOME_DIR="/opt/datasets/shell/demo01"
CONFIG_FILE="process.cfg"
this_pid=$$


function get_all_group
{
	glist=$(sed -n '/\[GROUP_LIST\]/,/\[.*\]/p' $HOME_DIR/$CONFIG_FILE | egrep -v '(^$|\[.*\])')
	echo $glist
	
}
# echo `get_all_group`
function get_all_process
{

	for g in `get_all_group`
	do
		plist=$(sed -n "/\[$g\]/,/\[.*\]/p" $HOME_DIR/$CONFIG_FILE | egrep -v '(^$|\[.*\])')
		echo $plist
	done
}

function get_process_pid_by_name
{
	if [ $# -ne 1 ];then
		return 1
	else
		pids=`ps -ef | grep $1 | grep -v grep | grep -v $this_pid | awk -v pname=$1 '$1==pname{print $2}'`
		echo $pids
	fi

}

function get_process_info_by_pid
{
	if [ `ps -ef | awk -v pid=$1 '$2==pid{print }' | wc -l` -eq 1  ];then
		process_status="STARTED"
	else 
		process_status="STOPPEND"
	fi
	
	process_cpu=`ps -aux | awk -v pid=$1 '$2==pid{print $3}'`
	process_mem=`ps -aux | awk -v pid=$1 '$2==pid{print $4}'`
	pro_start_time=`ps -p $1 -o lstart | grep -v STARTED`
}

function is_group_in_config
{
	for gn in `get_all_group`
	do
		if [ $gn == $1 ];then
			return
		fi
	done
	return 1
}

function get_all_process_by_group
{
	is_group_in_config $1
	if [ $? -eq 1 ];then
		echo "GroupName $1 is not in config..."
	fi

	p_list=$(sed -n "/\[$1\]/,/\[.*\]/p" $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])")
	echo $p_list
}
function get_group_by_pn
{
	for gn in `get_all_group`
	do
		for pn in `get_all_process_by_group $gn`
		do
			if [ $1 == $pn ];then
				echo $gn
			fi
		done
	done

}
function is_process_in_config
{
	for pn in `get_all_process`
	do
		if [ $1 == $pn ];then
			return 
		fi
	done
	return 1
}
function format_output
{
        ps -ef | grep $1 |grep -v grep | grep -v $this_pid &> /dev/null
        if [ $? -eq 0 ];then
                pids=`get_process_pid_by_name $1`
	
                for pid in $pids
                do
                        get_process_info_by_pid $pid
                        awk -v p_name=$1 \
                                -v g_name=$2 \
                                -v p_status=$process_status \
                                -v p_cpu=$process_cpu \
                                -v p_mem=$process_mem \
                                -v p_time="$pro_start_time" \
                                'BEGIN{printf "%-15s%-15s%-15s%-15s%-15s%-15s\n",p_name,g_name,p_status,p_cpu,p_mem,p_time}'
                done
        else
                awk -v p_name=$1 \
                                -v g_name=$2 \
                                -v p_status=$process_status \
                                -v p_cpu=$process_cpu \
                                -v p_mem=$process_mem \
                                -v p_time="$pro_start_time" \
                                'BEGIN{printf "%-15s%-15s%-15s%-15s%-15s%-15s\n",p_name,g_name,"NULL","NULL","NULL","NULL"}'
	fi
}
# get_process_pid_by_name $1

# echo $pids

# get_process_info_by_pid 1380

# echo "$process_status $process_cpu $process_mem $pro_start_time"

if [ ! -e $CONFIG_FILE ]; then
        echo "$CONFIG_FILE not foud!"
 	exit 1
fi
	
# for pn in `get_all_process`
# do
# 	get_process_pid_by_name $pn
# 	echo $pids
# 
# done
if [ $# -gt 0 ];then
	if [ $1 == "-g" ];then
		shift
		for gn in $@
		do
           		is_group_in_config $gn || continue
			for pn in `get_all_process_by_group $gn`
            		do
                   		format_output $pn $gn
			done
		done	
	else
		for pn in $@
		do
            		is_process_in_config $pn || continue
			gname=`get_group_by_pn $pn`
                	format_output $pn $gn
		done
	fi
else
    for pn in `get_all_process`
    do
        gname=`get_group_by_pn $pn`
        format_output $pn $gname
    done
fi

## get_group_by_pn mysql
## get_all_process_by_group DB1
## 
## 
## for g in `get_all_process`
## do
## 	echo $g
## done
## get_process_info_by_pid 1380
#get_process_pid_by_name mysql

# Shell之脚本功能概述

Shell之脚本功能概述

脚本拆分–函数

实现

程序设计主流程

s测试

完整代码

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