Do you find Cacti like me too cluttered? Find PHP nonsense on a Server for a single Tool? Then maybe you will install Monit / SimpleMonitor. Simple Tools without major dependencies and with a simple web interface. Monit causes problems with the SMTP / Submission Checks, so I installed also Simple Monitor.
First we installed and configure the monit tool.
Monit
pacman -S monit
The configuration can be found in the file /etc/monitrc, but it is recommended to create the directory /etc/monit.d and store your own configurations there and to activate the corresponding directory in the monitrc.
mkdir /etc/monit.d
Let us create the alert stuff:
set mailserver meinmailser.com port 587
username "username" password "password"
using tlsv12
set mail-format {
from: monit@pi
subject: $SERVICE $EVENT at $DATE
message: Monit $ACTION $SERVICE at $DATE on $HOST: $DESCRIPTION.
}
set alert meinealtertmail
Of course, you have to adapt this to your Situation. Next, we can create the Hosts. I created a file for each Host.
check host myserver with address myserver
if failed
port 22
protocol ssh
then alert
if failed
port 587 and
expect "^220.*"
send "HELO myserver\r\n"
expect "^250.*"
send "QUIT\r\n"
for 3 cycles
then alert
if failed
port 993
protocol imaps
then alert
if failed
port 443
protocol https
status = 200
content = "Silvio Siefke"
then alert
if failed
port 80
protocol http
status = 301
then alert
Then start monit and you can see the result in the built-in web interface. If you use a Server like me, you have to bind the web server to the public ip in /etc/monitrc.
systemd enable --now monit
Simple Monitor
Now let us installed SimpleMonitor. Installation and configuration is easy like with monit. Simple Monitor need some python modules and python version 3.
pacman -S python-colorlog python-pydbus python-paho-mqtt
Let us clone the Github Repo.
git clone https://github.com/jamesoff/simplemonitor.git
Simple Monitor use two files, the file monitor.ini for the program settings, monitors.ini for the hosts settings which you want to monitor. Both files should be in the same folder like monitor.py.
nano monitor.ini
[monitor]
interval=300
[reporting]
loggers=logfile
alerters=email
[logfile]
type=html
folder=/srv/http/sisi/monitor
filename=/srv/http/sisi/monitor/index.html
header=/srv/http/sisi/monitor/header.html
footer=/srv/http/sisi/monitor/footer.html
[email]
type=email
host=localhost
from=root
to=siefke
For Settings details take a look on the website. I use only the webinterface but also you can use a log, a database or a combination of it. The webinterface I take in my nginx folder, so I copy also the file from html directory in it. Next you can see my monitors.ini.
nano monitors.ini
[ru-mail-ping]
type=host
host=ru-mail.silviosiefke.com
tolerance=2
[silviosiefke.ru]
type=http
url=https://silviosiefke.ru
allowed_codes=200
[ru-mail-dovecot]
type=tcp
host=ru-mail.silviosiefke.com
port=993
[ru-mail-smtp]
type=tcp
host=ru-mail.silviosiefke.com
port=25
[ru-mail-submission]
type=tcp
host=ru-mail.silviosiefke.com
port=587
I use shell script to start the tool.
cat /usr/local/bin/monitor.sh
#!/usr/bin/env bash
cd /usr/local/simplemonitor && exec /usr/bin/python3 monitor.py -q >> /var/log/simplemonitor.log
For system start I use systemd.
cat /etc/systemd/system/monitor.service
[Unit]
Description=Monitoring my network
After=network.target
[Service]
Type=simple
ExecStart=/usr/local/bin/monitor.sh
Restart=on-failure
[Install]
WantedBy=multi-user.target
