Use Monit on AWS and Ubuntu

Examples

# Monit local http process
 check process httpd with pidfile /var/run/httpd/httpd.pid
 start program = "/usr/bin/systemctl httpd start"
 stop program = "/usr/bin/systemctl httpd stop"
 if children > 250 then restart
 if 3 restarts within 5 cycles then timeout

#  Monit local endpoint
 check host phisaver with address phisaver.com
     start program = "/bin/systemctl start httpd"
     stop program  = "/bin/systemctl stop httpd"
     if failed
        port 80
        protocol http
         method GET
         content = ".*phisaver.*"
     for 2 cycles
     then restart

# Monit influxdb
check host influxdb with address live2.phisaver.com
     start program = "/bin/systemctl start influxdb"
     stop program  = "/bin/systemctl stop influxdb"
     if failed
        port 8086
        protocol http
        username ******
        password ******
         method GET
        request "/query?q=SHOW DATABASES"
     for 2 cycles
     then restart

# Monit ngnix
check process nginx with pidfile /run/nginx.pid
start program = "/bin/systemctl start nginx" with timeout 60 seconds
     stop program  = "/bin/systemctl stop nginx "
     if failed host 127.0.0.1 port 80
         protocol http
         content = ".grafana."
         for 3 cycles
         then restart

# monit remote endpoint
check host live2-phisaver with address live2.phisaver.com
     if failed port 80 protocol http
        and request / with content = "Grafana"
     then alert

Installation

Unfortunately, AWS (ec2) doesn’t come with monit available via:

sudo yum install monit # ain't gunna work on AWS

So we need to do the following:

• Get binary from https://mmonit.com/monit/#download
• Install manually:

tar zxvf monit-x.y.z-linux-x64.tar.gz (x.y.z denotes version numbers)
cd monit-x.y.z
cp bin/monit /usr/local/bin/
cp conf/monitrc /etc/

• Install as a service: https://mmonit.com/wiki/Monit/Systemd

Check it’s running. When running, be sure to use sudo (root):

sudo /usr/local/bin/monit status

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