System Monitoring monit

The company's Tomcat server Java Virtual Machine is unstable. To ensure security, install monit self-monitoring.

Monit is a monitoring software that provides rich functions for processes, files, directories, and devices. It is used on UNIX platforms. It can automatically fix stopped programs and is suitable for the Special Envoy to handle software errors caused by multiple reasons. Services can be "recovered ".

Official http://mmonit.com/monit/documentation/monit.html

I. Installation

# Tar-zxvf monit-5.8.1.tar.gz

# Cd monit-5.8.1

#./Configure -- prefix =/usr/local/monit \

-- Without-Pam \

-- Sysconfdir =/usr/local/monit/etc

# Make & make install

# Cp-A monit-5.8.1/monitrc/usr/local/monit/etc

# Chmod 700/usr/local/monit/etc/monitrc

Ii. Configuration File

 # Vim/Urs/local/monit/etc/monitrc

Set Daemon 300 # Set the monitoring time, in seconds

Set logfile/usr/local/monit/log/monit. log # Set the location of the log file

Set MailServer smtp.xxxxx.com username "" password "# Set the alarm mailbox

Set mail-format {from: Any name @ domain name} # Set the alarm mail format, the alarms received are all fromRenyi name @ domain name this mailbox

Set alert: email address for receiving alarm emails # Set the email address for receiving alarm emails. If there are multiple email addresses, use the same format and select another line.

Set httpd port 2812 and

Use address local IP # only accept connection from localhost

Allow IP (accessible IP) # allow localhost to connect to the server

Allow admin: ccmonit # require user 'admin' with password 'monit'

Allow @ monit # Allow Users of group 'monit' to connect (RW)

Allow @ users readonly # Allow Users of group 'users' to connect readonly

#Self-monitoring Tomcat

Check host Tomcat with address IP (local IP)

Start program = "/usr/local/tomcat/bin/Catalina. Sh start"

Stop program = "/usr/local/tomcat/bin/shutdown. Sh"

If failed

Port 80

Protocol HTTP

Request "/test/time. jsp" # Time Test page

Then restart

If 4 restarts within 4 cycles then unmonitor # If tmcat cannot be started four times in a row, stop the restart.

Iii. Test page

# Cd/usr/local/tomcat/webapps/

# Mkdir Test

# Cd Test

# Vim time. jsp (display the current system time)

Access http: // ip/test/time. jsp for verification

4. monit init script

#! /Bin/bash # init file for monit ### chkconfig:-80 20 # Description: monit daemon # processname: monitsource/etc/rc. d/init. d/functions ### default variablesconfig = "/usr/local/monit/etc/monitrc" [-x/usr/local/monit/bin/monit] | Exit 1 [-R "$ config"] | exit 1bin_path =/usr/local/monit/binretval = 0 prog = "monit" DESC = "monit daemon" Start () {echo-N $ "Starting $ DESC ($ prog):" daemon $ bin_path/$ prog-C "$ Config" retval =$? Echo [$ retval-EQ 0] & Touch/var/lock/subsys/$ prog return $ retval} STOP () {echo-N $ "shutting down $ DESC ($ prog):" killproc $ prog retval =$? Echo [$ retval-EQ 0] & Rm-F/var/lock/subsys/$ prog return $ retval} restart () {stop start} reload () {echo-N $ "reloading $ DESC ($ prog):" killproc $ prog-hup retval =$? Echo return $ retval} case "$1" in START) Start; stop) Stop; restart) restart; RELOAD) Reload; condrestart) [-E/var/lock/subsys/$ prog] & restart retval =$?; Status) # Status $ prog $ bin_path/$ prog status retval = $?; *) Echo $ "Usage: $0 {START | stop | restart | reload | condrestart | status}" retval = 1 esacexit $ retv

5. Management Process

# Service monit monitor name | all starts monitoring a service | all services

# Service monit unmonitor name | all disables monitoring of a service | all services

# Service monit start name | all starts a service | all services

# Service monit stop name | all disables a service | all services

# Service monit status: displays the monitored service status

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