Tomcat筆記之監控
阿新 • • 發佈：2018-10-31
實現監控方法
1.利用tomcat自帶的預設檢視狀態資訊頁面
在conf目錄下的tomcat-user.xml中新增登陸使用者名稱和密碼
<role rolename="manager-gui"/> <role rolename="admin-gui"/> <user username="tomcat" password="tomcat" roles="manager-gui,admin-gui"/> 加入以上程式碼 http://10.0.0.81:8080/manager 輸入賬號密碼登陸 都為tomcat
2.在tomcat伺服器上部署相應監控頁面程式碼
<% Runtime rtm = Runtime.getRuntime(); long mm = rtm.maxMemory()/1024/1024; long tm = rtm.totalMemory()/1024/1024; long fm = rtm.freeMemory()/1024/1024; out.println("JVM memory detail info :<br>"); out.println("Max memory:"+mm+"MB"+"<br>"); out.println("Total memory:"+tm+"MB"+"<br>"); out.println("Free memory:"+fm+"MB"+"<br>"); out.println("Available memory can be used is :"+(mm+fm-tm)+"MB"+"<br>"); %>
3.第三方監控軟體（jdk）
tomcat服務端配置
#在tomcat配置檔案中開啟監控功能 vim /application/tomcat-01/bin/catalina.sh +97 CATALINA_OPTS="$CATALINA_OPTS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=12345 --監控埠 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=10.0.0.81"
修改完重啟並檢視相應埠
[[email protected] conf]# shutdown.sh
Using CATALINA_BASE: /application/tomcat
Using CATALINA_HOME: /application/tomcat
Using CATALINA_TMPDIR: /application/tomcat/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar
[[email protected] conf]# startup.sh
Using CATALINA_BASE: /application/tomcat
Using CATALINA_HOME: /application/tomcat
Using CATALINA_TMPDIR: /application/tomcat/temp
Using JRE_HOME: /application/jdk
Using CLASSPATH: /application/tomcat/bin/bootstrap.jar:/application/tomcat/bin/tomcat-juli.jar
Tomcat started.
[[email protected] conf]# ss -lntup|grep 12345
tcp LISTEN 0 50 :::12345 :::* users:(("java",pid=4841,fd=20))
windows安裝第三方監控軟體jdk
一直下一步就好
在位址列輸入：C:\Program Files\Java\jdk1.8.0_31\bin\jconsole.exe
在彈出頁面點選遠端程序
輸入相應ip+埠即可
在位址列輸入：C:\Program Files\Java\jdk1.8.0_31\bin\jvisualvm.exe
在彈出頁面：遠端->右鍵->新增遠端主機->輸入tomcat伺服器ip->選擇主機右鍵->新增JMX連線->輸入相應埠->再開啟即可
4.利用命令進行檢視操作或者利用監控指令碼
命令：jps -lvm
指令碼程式碼
#!/bin/bash
# @Function
# Find out the highest cpu consumed threads of java, and print the stack of these threads.
#
# @Usage
# $ ./show-busy-java-threads.sh
#
# @author Jerry Lee
readonly PROG=`basename $0`
readonly -a COMMAND_LINE=("$0" "[email protected]")
usage() {
cat <<EOF
Usage: ${PROG} [OPTION]...
Find out the highest cpu consumed threads of java, and print the stack of these threads.
Example: ${PROG} -c 10
Options:
-p, --pid find out the highest cpu consumed threads from the specifed java process,
default from all java process.
-c, --count set the thread count to show, default is 5
-h, --help display this help and exit
EOF
exit $1
}
readonly ARGS=`getopt -n "$PROG" -a -o c:p:h -l count:,pid:,help -- "[email protected]"`
[ $? -ne 0 ] && usage 1
eval set -- "${ARGS}"
while true; do
case "$1" in
-c|--count)
count="$2"
shift 2
;;
-p|--pid)
pid="$2"
shift 2
;;
-h|--help)
usage
;;
--)
shift
break
;;
esac
done
count=${count:-5}
redEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;31m"
echo -n "[email protected]"
echo -e "\033[0m"
} || echo "[email protected]"
}
yellowEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;33m"
echo -n "[email protected]"
echo -e "\033[0m"
} || echo "[email protected]"
}
blueEcho() {
[ -c /dev/stdout ] && {
# if stdout is console, turn on color output.
echo -ne "\033[1;36m"
echo -n "[email protected]"
echo -e "\033[0m"
} || echo "[email protected]"
}
# Check the existence of jstack command!
if ! which jstack &> /dev/null; then
[ -z "$JAVA_HOME" ] && {
redEcho "Error: jstack not found on PATH!"
exit 1
}
! [ -f "$JAVA_HOME/bin/jstack" ] && {
redEcho "Error: jstack not found on PATH and $JAVA_HOME/bin/jstack file does NOT exists!"
exit 1
}
! [ -x "$JAVA_HOME/bin/jstack" ] && {
redEcho "Error: jstack not found on PATH and $JAVA_HOME/bin/jstack is NOT executalbe!"
exit 1
}
export PATH="$JAVA_HOME/bin:$PATH"
fi
readonly uuid=`date +%s`_${RANDOM}_$$
cleanupWhenExit() {
rm /tmp/${uuid}_* &> /dev/null
}
trap "cleanupWhenExit" EXIT
printStackOfThread() {
local line
local count=1
while IFS=" " read -a line ; do
local pid=${line[0]}
local threadId=${line[1]}
local threadId0x=`printf %x ${threadId}`
local user=${line[2]}
local pcpu=${line[4]}
local jstackFile=/tmp/${uuid}_${pid}
[ ! -f "${jstackFile}" ] && {
{
if [ "${user}" == "${USER}" ]; then
jstack ${pid} > ${jstackFile}
else
if [ $UID == 0 ]; then
sudo -u ${user} jstack ${pid} > ${jstackFile}
else
redEcho "[$((count++))] Fail to jstack Busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) stack of java process(${pid}) under user(${user})."
redEcho "User of java process($user) is not current user($USER), need sudo to run again:"
yellowEcho " sudo ${COMMAND_LINE[@]}"
echo
continue
fi
fi
} || {
redEcho "[$((count++))] Fail to jstack Busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) stack of java process(${pid}) under user(${user})."
echo
rm ${jstackFile}
continue
}
}
blueEcho "[$((count++))] Busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) stack of java process(${pid}) under user(${user}):"
sed "/nid=0x${threadId0x} /,/^$/p" -n ${jstackFile}
done
}
ps -Leo pid,lwp,user,comm,pcpu --no-headers | {
[ -z "${pid}" ] &&
awk '$4=="java"{print $0}' ||
awk -v "pid=${pid}" '$1==pid,$4=="java"{print $0}'
} | sort -k5 -r -n | head --lines "${count}" | printStackOfThread
5.利用zabbix監控軟體（重點）
安裝
yum install -y zabbix-java-gateway-4.0.0-2.el7.x86_64
或者
rpm -ivh https://mirrors.tuna.tsinghua.edu.cn/zabbix/zabbix/4.0/rhel/7/x86_64/zabbix-java-gateway-4.0.0-2.el7.x86_64.rpm
PS：這裡有一個坑
若是直接使用rpm安裝會報錯，切記！
啟動
[[email protected]_ser ~]# systemctl start zabbix-java-gateway.service
[[email protected]_ser ~]# ss -lntup|grep java
tcp LISTEN 0 50 :::10052 :::* users: (("java",pid=126186,fd=13))
修改zabbix配置檔案中與Java有關的
[[email protected]_ser ~]# grep java -i /etc/zabbix/zabbix_server.conf
# Number of pre-forked instances of pollers for unreachable hosts (including IPMI and Java).
# At least one poller for unreachable hosts must be running if regular, IPMI or Java pollers
### Option: JavaGateway
# IP address (or hostname) of Zabbix Java gateway.
# Only required if Java pollers are started.
# JavaGateway=127.0.0.1
### Option: JavaGatewayPort
# Port that Zabbix Java gateway listens on.
# JavaGatewayPort=10052
### Option: StartJavaPollers
# Number of pre-forked instances of Java pollers.
# StartJavaPollers=5
修改的地方：
JavaGateway=127.0.0.1
StartJavaPollers=5
重啟
在tomcat端安裝zabbix—agent
[[email protected] conf]# rpm -ivh https://mirrors.tuna.tsinghua.edu.cn/zabbix/zabbix/4.0/rhel/7/x86_64/zabbix-agent-4.0.0-2.el7.x86_64.rpm
修改配置檔案
不多說=-=
在http://10.0.0.77/zabbix web介面新增一臺主機，勾選JMX輸入tomcat的地址即可
