Tomcat 监控的几种方法

 <role rolename="manager-gui"/>

 <user username=“manager" password=“1234" roles="manager-gui"/>

#!/bin/bash

# ========================Default Settings===============================

# address of status page

STATUS_ADDR="http://localhost:8080/manager/status?XML=true"

USER="manager"

PASS="1234"

# sample rate, default: 5seconds

SAMPLE_RATE=5

# if press "Ctrl+c", stop monitor

EXIT_SIGNAL=2

# connector to monitor

CONNECTOR="http-8080"

# result directory to store data

RESULT_DIR="/tmp"

# perf data file

PERF_DATA="perf_data"

# jvm data file

JVM_DATA="jvm_data"

# connector data file

CONNECTOR_DATA="connector_data"

# thread data file

THREAD_DATA="thread_data"

# request data file

REQUEST_DATA="request_data"

# ===========================Output Error Message========================

# Show Error Message and exit, get one parameter

errorMsg()

{

        if [[ $# -eq 1 ]]; then

                echo "Runtime Error: $1"

                exit 1

        else

                echo "Function Error: errorMsg"

                exit 127

        fi

}

# =========================Get Data Function=============================

# Get performance data, no parameter wanted

getPerfData()

{

        cd $RESULT_DIR

        wget --http-user="$USER" --http-password="$PASS" "$STATUS_ADDR" -O "$PERF_DATA" || errorMsg "Failed to get data, please check the connection"

        # JVM data

        sed ‘s/.*<jvm>//g;s/<\/jvm>.*//g‘ $PERF_DATA | awk -F \‘ ‘{ print $2, $4, $6 }‘ >> $JVM_DATA

        # ‘Connector data

        sed ‘s/.*‘$CONNECTOR‘.>//g;s/<\/connector>.*//g‘ $PERF_DATA >> $CONNECTOR_DATA

        # Thread data

        sed ‘s/.*<threadInfo//g;s/\/>.*//g‘ $CONNECTOR_DATA | awk -F \" ‘{ print $2, $4, $6 }‘ >> $THREAD_DATA

        # " Request data

        sed ‘s/.*<requestInfo//g;s/\/>.*//g‘ $CONNECTOR_DATA | awk -F \" ‘{ print $2, $4, $6, $8, $10, $12 }‘ >> $REQUEST_DATA

}

# ========================Build Chart Function==========================

# "according the data, build the chart (use gnuplot)

buildChart()

{   

        TITLE=""

        OUTPUT=""

        PLOT=""

        YRANGE="[0:]"

        case "$1" in

                "jvm" )

                TITLE="JVM"

                OUTPUT="jvm_graph.png"

                PLOT="plot ‘jvm_data‘ using 1 title ‘free‘ w linespoints, \

                ‘jvm_data‘ using 2 title ‘total‘ w linespoints,\

                ‘jvm_data‘ using 3 title ‘max‘ w linespoints"

                ;;

                "thread" )

                TITLE="Thread"

                OUTPUT="thread_graph.png"

                PLOT="plot ‘thread_data‘ using 1 title ‘max threads‘ w linespoints,\

                ‘thread_data‘ using 2 title ‘current thread count‘ w linespoints,\

                ‘thread_data‘ using 3 title ‘current thread busy‘ w linespoints"

                ;;

                "request" )

                TITLE="Request"

                YRANGE="[-1:]"

                OUTPUT="request_graph.png"

                PLOT="plot ‘request_data‘ using 1 title ‘max time‘ w linespoints,\

                ‘request_data‘ using 2 title ‘processing time‘ w linespoints,\

                ‘request_data‘ using 3 title ‘request count‘ w linespoints,\

                ‘request_data‘ using 4 title ‘error count‘ w linespoints,\

                ‘request_data‘ using 5 title ‘bytes received‘ w linespoints,\

                ‘request_data‘ using 6 title ‘bytes sent‘ w linespoints"

                ;;

        esac

        # build graph

        gnuplot <<EOF

        set terminal png small size 480,360

        set title "$TITLE"

        set yrange $YRANGE

        set grid

        set xlabel "timeline (s)"

        set output "$OUTPUT"

        $PLOT

EOF

}

# ========================Build Report Function=========================

# include data and chart, give a readable html report

buildReport()

{

        # build graph jvm, request,thread

        buildChart "jvm" || errorMsg "Function Error: build jvm graph"

        buildChart "thread" || errorMsg "Function Error: build thread graph"

        buildChart "request" || errorMsg "Function Error: build request graph"

        # build html report

}

# ========================Stop Monitor Function

# call buildReport function

stopMonitor()

{

    echo "Monitor stopped, and we are building the report ..."

    buildReport || errorMsg "Function Error: buildReport"

    exit

}

# =============================Main Function=============================

trap "stopMonitor" $EXIT_SIGNAL

while :

do

        getPerfData || errorMsg "Failed to get performance data"

        sleep $SAMPLE_RATE

done

在录制好的LR脚本中添加如下代码：
double atof(const char *string);

float FreeMemory,TotalMemory,MaxMemory;

 //定义tomcat内存使用情况的监视器事务；

lr_start_transaction("monitor tomcat");

//保存3个参数；

 web_reg_save_param("JVMFreeMemory", 

     "LB=Free memory: ",

     "RB= MB",

     "Ord=1",

   LAST);

   web_reg_save_param("JVMTotalMemory",

   "LB=Total memory: ",

   "RB= MB",

   "Ord=1",

   LAST);

     web_reg_save_param("JVMMaxMemory",

     "LB=Max memory: ",

     "RB= MB",

     "Ord=1",

    LAST);

//通过LR去访问tomcat监控页

   web_set_user("admin","1234","localhost:8080");

   web_url("status",

        "URL=http://localhost:8080/manager/status",

        "Resource=0",

        "RecContentType=text/html",

        "Referer=",

        "Snapshot=t1.inf",

        "Mode=HTTP",

    LAST);

 
 FreeMemory=atof(lr_eval_string("{JVMFreeMemory}"));
 TotalMemory=atof(lr_eval_string("{JVMTotalMemory}"));
 MaxMemory=atof(lr_eval_string("{JVMMaxMemory}"));
 lr_output_message("%.2f %.2f %.2f",FreeMemory,TotalMemory,MaxMemory);

// Tomcat JVM metrics  使用lr_user_data_point（）添加数据到图表中去
    lr_user_data_point("Tomcat JVM Free memory", FreeMemory);
    lr_user_data_point("Tomcat JVM Total memory", TotalMemory);
    lr_user_data_point("Tomcat JVM Max memory", MaxMemory);
 lr_end_transaction("monitor tomcat", LR_AUTO);
return 0;