1. 腳本工具功能概述
需求描述:
- 實作一個腳本工具,該腳本提供類似supervisor功能,可以對程序進行管理;
- 一鍵檢視所有程序運作狀态;
- 單個或批量啟動程序,單個或批量停止程序;
- 提供程序分組功能,可以按組檢視程序運作狀态,可以按組啟動或停止該組内所有程序;
2. 拆分腳本功能,抽象函數
- function get_all_process 傳回程序名稱清單字元串"nginx httpd mysql datanode"
- function get_all_group 傳回程序組清單字元串
- function get_process_info(該函數可以接收一個參數,參數為程序名稱) 傳回程序詳細資訊清單字元串,詳細資訊包括:運作狀态、PID、CPU、MEM、啟動時間
- function get_all_process_by_group 傳回程序組内的所有程序名稱清單字元串
例子:DB組--> "mysql postgresql oracle"
3. 功能函數
- process.cfg
[GROUP_LIST]
WEB
DB
HADOOP
YARN
[WEB]
nginx
httpd
[DB]
mysql
postgresql
oracle
[HADOOP]
datanode
namenode
journalnode
[YARN]
resourcemanager
nodemanager
[nginx]
description="Web Server 1"
program_name=tail
parameter=-f /root/lesson/9.1/tmp/web-nginx.conf
[httpd]
description="Web Server 2"
program_name=tail
parameter=-f /root/lesson/9.1/tmp/web-httpd.conf
[mysql]
description="High Performance DataBase"
program_name=tail
- function get_all_group 傳回程序組清單字元串
vim app_status.sh
#!/bin/bash
#
# Func: Get Porcess Status In process.cfg
# Define Variables
HOME_DIR="/root/lesson/9.1"
CONFIG_FILE="process.cfg"
function get_all_group
{
if [ -e $HOME_DIR/$CONFIG_FILE ];then
echo "$CONFIG_FILE is not exist..Please Check.."
exit 1
else
G_LIST=`sed -n '/\[GROUP_LIST\]/,/\[.*\]/p' process.cfg | egrep -v "(^$|\[.*\])" `
echo "$G_LIST"
fi
}
groups=`get_all_group`
echo $groups
- function get_all_process 傳回程序名稱清單字元串
- function get_process_info(注:該函數可以接收一個參數,參數為程序名稱) 傳回程序詳細資訊清單字元串,詳細資訊包括:運作狀态、PID、CPU、MEM、啟動時間
- function get_all_process_by_group 傳回程序組内的所有程序名稱清單字元串(例子:DB組–> “mysql postgresql oracle”
vim app_status.sh
#!/bin/bash
#
# Func: Get Porcess Status In process.cfg
# Define Variables
HOME_DIR="/root/lesson/9.1"
CONFIG_FILE="process.cfg"
this_pid=$$
function get_all_group
{
G_LIST=`sed -n '/\[GROUP_LIST\]/,/\[.*\]/p' $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])" `
echo "$G_LIST"
}
function get_all_process
{
for g in `get_all_group`
do
P_LIST=`sed -n "/\[$g\]/,/\[.*\]/p" $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])"`
echo "$P_LIST"
done
}
function get_process_pid_by_name #process_name
{
if [ $# -ne 1 ];then
return 1
else
pids=`ps -ef | grep $1 | grep -v grep | grep -v $0 | awk '{print $2}'`
echo $pids
fi
}
function get_process_info_by_pid #process_pid
{
num=1
if [ `ps -ef | awk -v pid=$1 '$2==pid{print }' | wc -l` -eq 1 ];then
pro_status="RUNNING"
else
pro_status="STOPED"
fi
pro_cpu=`ps aux | awk -v pid=$1 '$2==pid{print $3}'`
pro_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 0 ];then
p_list=`sed -n "/\[$1\]/,/\[.*\]/p" $HOME_DIR/CONFIG_FILE | egrep -v "(^$|^#|\[.*\])"`
echo $p_list
else
echo "GroupName $1 is not in process.cfg"
fi
}
if [ !-e $HOME_DIR/$CONFIG_FILE ];then
echo "$CONFIG_FILE is not exist..please check.."
exit 1
fi
4. 程式主流程設計
./app_status.sh 執行有三種情況:
- 無參數 列出配置檔案中所有程序的運作資訊
- -g GroupName 列出GroupName組内的所有程序
- process_name1 列出指定程序的運作資訊
#說明:該函數無需輸入任何參數;傳回配置檔案 process.cfg中所有的組資訊,例如WEB、DB等
function get_all_group
#說明:該函數無需輸入任何參數;傳回配置檔案 process.cfg 中所有的程序資訊。
function get_all_process
#說明:該函數接收一個參數,參數為程序名稱;傳回值是一個PID的清單,可能有一個PID,也可能有多個
function get_process_pid_by_name
#說明:該函數接收一個參數,參數為程序PID;傳回值是一個程序運作資訊的清單,清單包含運作狀态、CPU占用率、記憶體占用率、程序啟動時間
function get_process_info_by_pid
#說明:該函數接收一個參數,參數為組的名稱;傳回值是0或1,0代表該組在配置檔案中,1代表該組不在配置檔案中
function is_group_in_config
#說明:該函數接受一個參數,參數為組名稱;傳回值是對應組内的所有程序名稱清單
function get_all_process_by_group
#說明:該函數接收一個參數,參數是一個程序名稱;傳回值是一個組名
function get_group_by_process_name
#說明:該函數接收兩個參數,第一個參數為process_name,第二個參數為組名稱;傳回值是針對每一個程序PID的運作資訊
funcion format_print
#說明:該函數接收一個參數,參數為程序名稱;傳回值是0或1,0代表該程序在配置檔案中,1代表程序不在配置檔案中
function is_process_in_config
vim app_status.sh
#!/bin/bash
#
# Func: Get Porcess Status In process.cfg
# Define Variables
HOME_DIR="/root/lesson/9.1"
CONFIG_FILE="process.cfg"
this_pid=$$
function get_all_group
{
G_LIST=`sed -n '/\[GROUP_LIST\]/,/\[.*\]/p' $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])" `
echo "$G_LIST"
}
function get_all_process
{
for g in `get_all_group`
do
P_LIST=`sed -n "/\[$g\]/,/\[.*\]/p" $HOME_DIR/$CONFIG_FILE | egrep -v "(^$|\[.*\])"`
echo "$P_LIST"
done
}
function get_process_pid_by_name #process_name
{
if [ $# -ne 1 ];then
return 1
else
pids=`ps -ef | grep $1 | grep -v grep | grep -v $0 | awk '{print $2}'`
echo $pids
fi
}
function get_process_info_by_pid #process_pid
{
num=1
if [ `ps -ef | awk -v pid=$1 '$2==pid{print }' | wc -l` -eq 1 ];then
pro_status="RUNNING"
else
pro_status="STOPED"
fi
pro_cpu=`ps aux | awk -v pid=$1 '$2==pid{print $3}'`
pro_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
echo "Group $1 is not in process.cfg"
return 1
}
function is_process_in_config
{
for pn in `get_all_process`;do
if [ $pn == $1];then
return
fi
done
echo "Process $1 is not in process.cfg"
return 1
}
function get_all_process_by_group
{
is_group_in_config $1
if [ $? -eq 0 ];then
p_list=`sed -n "/\[$1\]/,/\[.*\]/p" $HOME_DIR/CONFIG_FILE | egrep -v "(^$|^#|\[.*\])"`
echo $p_list
else
echo "GroupName $1 is not in process.cfg"
fi
}
function get_group_by_process_name
{
for gn in `get_all_group`;do
for pn in `get_all_process_by_group $gn`;do
if [ $pn == $1 ];then
echo "$gn"
fi
done
done
}
function format_print
{
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=$2 \
-v p_status=$pro_status \
-v p_pid=$pid \
-v p_cpu=$pro_cpu \
-v p_mem=$pro_mem \
-v p_start_time="$pro_start_time" \
'BEGIN{printf "%-10s%-12s%-5s%-5s%-5s%-5s%-15s\n",p_name,g_name,p_status,p_pid,p_cpu,p_mem,p_start_time}'
done
else
awk -v p_name=$1 -v g_name=$2 'BEGIN{printf "%-10s%-12s%-5s%-5s%-5s%-5s%-15s\n",p_name,g_name,"STOPED","NULL","NULL","NULL","NULL"}'
fi
}
awk 'BEGIN{printf "%-20s%-10s%-10s%-6s%-7s%-10s%-20s\n","ProcessName---------","GroupName---","Status----","PID---","CPU----","MEMORY----","StartTime---"}'
if [ $# -gt 0 ];then
if [ "$1" == "-g" ];then
shift
for gn in [email protected];do
is_group_in_config $gn || continue
for pn in `get_all_process_by_group $gn`;do
is_process_in_config $pn && format_print $pn $gn
done
done
else
for pn in [email protected];do
gn=`get_group_by_process_name $pn`
is_process_in_config $pn && format_print $pn $gn
done
fi
else
for pn in `get_all_process`;do
gn=`get_group_by_process_name $pn`
is_process_in_config $pn && format_print $pn $gn
done
fi