bash-pingdom-analog

Let your server monitor other your servers like pingdom. If you have two or more server in different regions, you can simple setup this cron script to monitor any servers or sites and send notifications to your email. Why? Simple, it's free.

Install sendmail

Skip this step if you already have worked sendmail on server

apt-get update
apt-get install sendmail

or remove first and install

apt-get purge sendmail && apt-get update
apt-get install sendmail

If need, install sendmail-bin too

apt-get install sendmail-bin

Correctly set server host name

hostnamectl set-hostname myhostname.com
hostname myhostname.com

where myhostname.com - is your real server host name

Get your current ip and write it to hosts file

ip -d address | grep -v "inet6" | grep "inet" | grep "scope" | grep "global" | grep "brd" | awk '{print $2}' | awk -F"/" '{print $1}'

192.168.0.145

Edit hosts file, add your server ip and real host name

nano /etc/hosts
127.0.0.1 localhost
192.168.0.145 myhostname.com myhostname

where myhostname.com - is your real server host name

Edit sendmail config file

nano /etc/mail/sendmail.mc

Fix hostname here for your or add this block

dnl #
dnl # Masquerading options
FEATURE(`always_add_domain')dnl
MASQUERADE_AS(`mydomain.com')dnl
FEATURE(`allmasquerade')dnl
FEATURE(`masquerade_envelope')dnl
dnl #

Also add this line

CLIENT_OPTIONS(`Family=inet')dnl

Then configure and restart sendmail service

sendmailconfig
service sendmail restart

Check if email can be sent

echo "Test message" | sendmail -v my@mail.com

where my@mail.com - is your real email

Script location

Location: /usr/local/bin/pingdom

Usage

Inside script just set your host, email and response http code, if http check is used. You can add more emails for the same host. You can check server by domain or ip, with ping/http type. Set for GMail filter to protect mail from spam.

# Add host name or IP with email here:

# add_host_ping "google.com" "my@email.com"
# add_host_ping "facebook.com" "my@email.com"
# add_host_http "google.com" "my@email.com" "200"

Crontab

* *	* * *	root	/usr/local/bin/pingdom >/dev/null

Quick install

wget -O /usr/local/bin/pingdom https://github.com/vladimirok5959/bash-pingdom-analog/releases/download/latest/pingdom; chmod +x /usr/local/bin/pingdom