What is it?
Telmon is a simple golang daemon that will monitor a given telnet connection from a telnet client to a telnet server.
It reports any loss in connection via
How to use it.
Install telmon binary from GitHub. In this tutorial, we will be using the linux OS builds.
sudo tar -C /usr/local/bin -xzf telmon_0.1_Linux_x86_64.tar.gz telmon
test it. If you see a message as one below, shows that it’s working.
$ telmon 2022/10/07 09:49:57 Config File ".telmon-config" Not Found in ...
- visit the releases page for system specific downloads.
In order to use telmon, create a configuration file
.telmon-config.yaml in any directory in which you will run the
.telmon-config.yaml configuration file in any directory accessible by the user. Home directory is better.
$ nano .telmon-config.yaml
The content of the configuration file should be as follows.
--- addr: example.com port: <telnet-port> email: <sender-email> password: <sender-email-password> receivers: - [email protected] - [email protected]
$ telmon Monitoring Service started successfully ... [2022-10-07T09:56:09+03:00] running [TelnetClient] Trying to connect to telnet server. [TelnetClient] Encountered errors while connecting: dial tcp 184.108.40.206:23: connect: connection refused Reporting this error [TelnetClient] Report sent successfully
Supervisord helps to monitor and control running processes in any linux machine. For linux users, add a supervisord configuration file to monitor telmon.
create a file /etc/supervisord/conf.d/telmon.conf
Add the content below.
[program:telmon] directory=/path/to/your/telmon/directory command=telmon autostart=true autorestart=true stderr_logfile=/var/log/telmon.err.log stdout_logfile=/var/log/telmon.out.log
Reload supervisord configurations.
supervisorctl reread supervisorctl update
OR .. reload supervisor