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#! /bin/bash
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#! /bin/bash
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#====================================================================
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#====================================================================
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# sys-mon.sh
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# sys-mon.sh
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#
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#
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# Copyright (c) 2011, WangYan <[email protected]>
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# Copyright (c) 2011, WangYan <[email protected]>
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# All rights reserved.
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# All rights reserved.
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# Distributed under the GNU General Public License, version 3.0.
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# Distributed under the GNU General Public License, version 3.0.
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#
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#
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# Monitor system mem and load, if too high, restart some service.
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# Monitor system mem and load, if too high, restart some service.
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#
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#
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# See: https://wangyan.org/blog/sys-mon-shell-script.html
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# See: https://wangyan.org/blog/sys-mon-shell-script.html
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#
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#
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# V 0.5, Date: 2011-12-08
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# V 0.5, Date: 2011-12-08
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#====================================================================
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#====================================================================
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# Need to monitor the service name
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# Need to monitor the service name

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# Must be in /etc/init.d folder exists
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# Must be in /etc/init.d folder exists

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NAME_LIST="httpd nginx mysql"
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NAME_LIST="httpd nginx mysql"

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# Single process to allow the maximum CPU (%)
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# Single process to allow the maximum CPU (%)

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PID_CPU_MAX="25"
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PID_CPU_MAX="25"

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# The maximum allowed memory (%)
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# The maximum allowed memory (%)

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PID_MEM_SUM_MAX="95"
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PID_MEM_SUM_MAX="95"

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# The maximum allowed system load
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# The maximum allowed system load

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SYS_LOAD_MAX="6"
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SYS_LOAD_MAX="6"

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# Log path settings
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# Log path settings

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LOG_PATH="/var/log/sys-mon.log"
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LOG_PATH="/var/log/sys-mon.log"

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# Date time format setting
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# Date time format setting

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DATA_TIME=$(date +"%y-%m-%d %H:%M:%S")
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DATA_TIME=$(date +"%y-%m-%d %H:%M:%S")

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# Your email address
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# Your email address

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EMAIL="[email protected]"
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EMAIL="[email protected]"

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# Your website url
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# Your website url

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MY_URL="http://106.187.38.210/p.php"
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MY_URL="http://106.187.38.210/p.php"

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#====================================================================
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#====================================================================

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for NAME in $NAME_LIST
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for NAME in $NAME_LIST

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do
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do

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    PID_CPU_SUM="0";PID_MEM_SUM="0"
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    PID_CPU_SUM="0";PID_MEM_SUM="0"

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    PID_LIST=`ps aux | grep $NAME | grep -v root`
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    PID_LIST=`ps aux | grep $NAME | grep -v root`

47-
47+
48-
    IFS_TMP="$IFS";IFS=$'\n'
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    IFS_TMP="$IFS";IFS=$'\n'

49-
    for PID in $PID_LIST
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    for PID in $PID_LIST

50-
    do
50+
    do

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        PID_NUM=`echo $PID | awk '{print $2}'`
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        PID_NUM=`echo $PID | awk '{print $2}'`

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        PID_CPU=`echo $PID | awk '{print $3}'`
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        PID_CPU=`echo $PID | awk '{print $3}'`

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        PID_MEM=`echo $PID | awk '{print $4}'`
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        PID_MEM=`echo $PID | awk '{print $4}'`

54-
#       echo "$NAME: PID_NUM($PID_NUM) PID_CPU($PID_CPU) PID_MEM($PID_MEM)"
54+
#       echo "$NAME: PID_NUM($PID_NUM) PID_CPU($PID_CPU) PID_MEM($PID_MEM)"

55-
55+
56-
        PID_CPU_SUM=`echo "$PID_CPU_SUM + $PID_CPU" | bc`
56+
        PID_CPU_SUM=`echo "$PID_CPU_SUM + $PID_CPU" | bc`

57-
        PID_MEM_SUM=`echo "$PID_MEM_SUM + $PID_MEM" | bc`
57+
        PID_MEM_SUM=`echo "$PID_MEM_SUM + $PID_MEM" | bc`

58-
58+
59-
        if [ `echo "$PID_CPU >= $PID_CPU_MAX" | bc` -eq 1 ];then
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        if [ `echo "$PID_CPU >= $PID_CPU_MAX" | bc` -eq 1 ];then

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            if [[ "$NAME" = "php-fpm" || "$NAME" = "httpd" ]];then
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            if [[ "$NAME" = "php-fpm" || "$NAME" = "httpd" ]];then

61-
                sleep 5
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                sleep 5

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                if [ `echo "$PID_CPU >= $PID_CPU_MAX" | bc` -eq 1 ];then
62+
                if [ `echo "$PID_CPU >= $PID_CPU_MAX" | bc` -eq 1 ];then

63-
                    echo "${DATA_TIME}: kill ${NAME}($PID_NUM) successful (CPU:$PID_CPU)" | tee -a $LOG_PATH
63+
                    echo "${DATA_TIME}: kill ${NAME}($PID_NUM) successful (CPU:$PID_CPU)" | tee -a $LOG_PATH

64-
                    kill $PID_NUM
64+
                    kill $PID_NUM

65-
                fi
65+
                fi

66-
            else
66+
            else

67-
                echo "${DATA_TIME}: [WARNING!] ${NAME}($PID_NUM) cpu usage is too high! (CPU:$PID_CPU)" | tee -a $LOG_PATH
67+
                echo "${DATA_TIME}: [WARNING!] ${NAME}($PID_NUM) cpu usage is too high! (CPU:$PID_CPU)" | tee -a $LOG_PATH

68-
            fi
68+
            fi

69-
        fi
69+
        fi

70-
    done
70+
    done

71-
    IFS="$IFS_TMP"
71+
    IFS="$IFS_TMP"

72-
72+
73-
    SYS_LOAD=`uptime | awk '{print $(NF-2)}' | sed 's/,//'`
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    SYS_LOAD=`uptime | awk '{print $(NF-2)}' | sed 's/,//'`

74-
    SYS_MON="CPU:$PID_CPU_SUM MEM:$PID_MEM_SUM LOAD:$SYS_LOAD"
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    SYS_MON="CPU:$PID_CPU_SUM MEM:$PID_MEM_SUM LOAD:$SYS_LOAD"

75-
#   echo -e "$NAME: $SYS_MON\n"
75+
#   echo -e "$NAME: $SYS_MON\n"

76-
76+
77-
    SYS_LOAD_TOO_HIGH=`awk 'BEGIN{print('$SYS_LOAD'>'$SYS_LOAD_MAX')}'`
77+
    SYS_LOAD_TOO_HIGH=`awk 'BEGIN{print('$SYS_LOAD'>'$SYS_LOAD_MAX')}'`

78-
    PID_MEM_SUM_TOO_HIGH=`awk 'BEGIN{print('$PID_MEM_SUM'>'$PID_MEM_SUM_MAX')}'`
78+
    PID_MEM_SUM_TOO_HIGH=`awk 'BEGIN{print('$PID_MEM_SUM'>'$PID_MEM_SUM_MAX')}'`

79-
79+
80-
    if [[ "$SYS_LOAD_TOO_HIGH" = "1" || "$PID_MEM_SUM_TOO_HIGH" = "1" ]];then
80+
    if [[ "$SYS_LOAD_TOO_HIGH" = "1" || "$PID_MEM_SUM_TOO_HIGH" = "1" ]];then

81-
        /etc/init.d/$NAME stop
81+
        /etc/init.d/$NAME stop

82-
        sleep 5
82+
        sleep 5

83-
        for ((i=1;i<4;i++))
83+
        for ((i=1;i<4;i++))

84-
        do
84+
        do

85-
            if [ `pgrep $NAME | wc -l` = "0" ];then
85+
            if [ `pgrep $NAME | wc -l` = "0" ];then

86-
                echo "$DATA_TIME: Stop $NAME successful! ($SYS_MON)" | tee -a $LOG_PATH
86+
                echo "$DATA_TIME: Stop $NAME successful! ($SYS_MON)" | tee -a $LOG_PATH

87-
                break
87+
                break

88-
            else
88+
            else

89-
                echo "${DATA_TIME}: [WARNING!] Stop $NAME failed[$i]! ($SYS_MON)" | tee -a $LOG_PATH
89+
                echo "${DATA_TIME}: [WARNING!] Stop $NAME failed[$i]! ($SYS_MON)" | tee -a $LOG_PATH

90-
                pkill $NAME && killall $NAME
90+
                pkill $NAME && killall $NAME

91-
            fi
91+
            fi

92-
        done
92+
        done

93-
        /etc/init.d/$NAME start
93+
        /etc/init.d/$NAME start

94-
        sleep 5
94+
        sleep 5

95-
        for ((ii=1;ii<4;ii++))
95+
        for ((ii=1;ii<4;ii++))

96-
        do
96+
        do

97-
            if [ `pgrep $NAME | wc -l` != "0" ];then
97+
            if [ `pgrep $NAME | wc -l` != "0" ];then

98-
                echo "$DATA_TIME: Start $NAME successful!" | tee -a $LOG_PATH
98+
                echo "$DATA_TIME: Start $NAME successful!" | tee -a $LOG_PATH

99-
                break
99+
                break

100-
            else
100+
            else

101-
                echo "${DATA_TIME}: [WARNING!] Start $NAME failed[$ii]! ($SYS_MON)" | tee -a $LOG_PATH
101+
                echo "${DATA_TIME}: [WARNING!] Start $NAME failed[$ii]! ($SYS_MON)" | tee -a $LOG_PATH

102-
                /etc/init.d/$NAME start
102+
                /etc/init.d/$NAME start

103-
                sleep 5
103+
                sleep 5

104-
            fi
104+
            fi

105-
        done
105+
        done

106-
        if [ `pgrep $NAME | wc -l` != "0" ];then
106+
        if [ `pgrep $NAME | wc -l` != "0" ];then

107-
            echo "${DATA_TIME}: [ERROR!] Start $NAME failed! ($SYS_MON)" | mail -s "Start $NAME failed" $EMAIL
107+
            echo "${DATA_TIME}: [ERROR!] Start $NAME failed! ($SYS_MON)" | mail -s "Start $NAME failed" $EMAIL

108-
        fi
108+
        fi

109-
    fi
109+
    fi

110-
done
110+
done

111-
111+
112-
STATUS_CODE=`curl -o /dev/null -s -w %{http_code} $MY_URL`
112+
STATUS_CODE=`curl -o /dev/null -s -w %{http_code} $MY_URL`

113-
#echo -e "STATUS CODE: $STATUS_CODE\n"
113+
#echo -e "STATUS CODE: $STATUS_CODE\n"

114-
114+
115-
if [ "$STATUS_CODE" != "200" ];then
115+
if [ "$STATUS_CODE" != "200" ];then

116-
    sleep 3
116+
    sleep 3

117-
    STATUS_CODE=`curl -o /dev/null -s -w %{http_code} $MY_URL`
117+
    STATUS_CODE=`curl -o /dev/null -s -w %{http_code} $MY_URL`

118-
    if [ "$STATUS_CODE" != "200" ];then
118+
    if [ "$STATUS_CODE" != "200" ];then

119-
        echo "${DATA_TIME}: [WARNING!] Website Downtime! ($SYS_MON)" | tee -a $LOG_PATH
119+
        echo "${DATA_TIME}: [WARNING!] Website Downtime! ($SYS_MON)" | tee -a $LOG_PATH

120-
        echo "${DATA_TIME}: [WARNING!] Website Downtime! ($SYS_MON)" | mail -s "Start $NAME failed" $EMAIL
120+
        echo "${DATA_TIME}: [WARNING!] Website Downtime! ($SYS_MON)" | mail -s "Start $NAME failed" $EMAIL

121-
    fi
121+
    fi

122
fi
        

    


            


                                


        

            



                
    

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