Sometimes it is necessary to determine whether there are enough channels of ground telephone lines, in case if the operator is connected to Asterisk. To collect such statistics in our company, we decided to record every minute (ideally, of course, more often) the number of active calls\channels in Asterisk to file, then plot if required.

There are two steps in the task:

1. Output needed data to file in manual mode.
2. Put the script into cron.

Just after clean Debian Jessie Linux installation, you will install SSH Daemon and then you will encounter an issue when you are not able to login via SSH with root account.

$ ssh root@10.1.1.1
root@10.1.1.1's password: 
Permission denied, please try again.

Z for Zabbix

As we all know, monitoring is a huge part of operations and, in my case, DevOps activities. It's one of the elephants, on which any software maintenance rely on, I would say.

Back to the ground, Azure Cloud is a nice platform, but still, it doesn't have "real" monitoring solution. Not for VMs, nor for any other it's resources. You can say - it has OMS and Azure Monitor, but I've encountered so many limitations and issues with it... Well, my point - is to develop your own bicycle monitoring system to match your environments and needs. 

Today I'll try to introduce my solution which is: highly avaliable, free and cloud-based.