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The Mythryll Log

Category: Automation

Ansible playbooks for Nagios Installation on Ubuntu 18.04.4 LTS / 20.04 LTS

Posted on May 17, 2020May 21, 2020

Hello all, this is @mythryll , I hope everyone is staying safe! This is going to be a long one, so strap in and enjoy the ride (hopefully)! A little back story A few years back I had started a conversation with the great Michael Friedrich who was at the time working at Icinga (I…

Monitor VPN Users on Check Point Firewall with the help of Netmiko and Python, InfluxDB and Grafana

Posted on April 21, 2020April 26, 2020

Preface This post describes how I got to create Python scripts in order to graph the VPN user count on Check Point GAIA Gateways to Grafana, using InfluxDB as Time Series Database to store the data. The process had several byproducts, such as Python scripts for reading and writing data to CSV files, creating and…

Migrating from MRTG/RRD/CGI to Grafana/InfluxDB/Telegraf on Docker containers for Enterprise Network Performance Monitoring with SNMP – Part 2

Posted on January 19, 2020January 19, 2020

In the previous episode… In the previous part of this series of posts, I described how it came to be that our SNMP monitoring infrastructure based on MRTG/RRD/CGI had reached the end of its days and how I decided to use Grafana with InfluxDB and Telegraf to replace it. The last post stopped right before…

Migrating from MRTG/RRD/CGI to Grafana/InfluxDB/Telegraf on Docker containers for Enterprise Network Performance Monitoring with SNMP – Part 1

Posted on December 11, 2019January 19, 2020

(if you are looking for part2, it’s here) Introduction I like reading guides, not writing them (it takes too long for me). So this isn’t a guide, it’s more like an adventure tale, it’s a “I got out one day for a stroll and look what happened!”. I had no knowledge of Grafana, InfluxDB, Telegraf…

Campus Vlan Cleanup after DC upgrade / Using Netmiko +NTC-Templates

Posted on May 22, 2019May 22, 2019

Hello everyone. Once more, trying to inset automation in maintenance tasks, after we performed a DC upgrade at the company network, separating DC/Campus networks, we needed to clean up a lot of vlans from the campus networks. I came up with this script to play around, make the task more interesting and also avoid repetitive…

Using netmiko with NTC-Templates to gather data into for DC migration – Produce cisco configuration commands from Excel file

Posted on April 22, 2019April 22, 2019

One month ago, we were migrating our DC core from older Cisco Catalyst models to Nexus models in 2 different DCs, connected over WDM, a longtime plan to provide a better foundation for networking services in our environment (+OTV, MacSec, etc). One of the plan’s main ideas was to separate user and DC networks and…

Python Script to process Prime LMS report for reclaiming Unused Up ports from legacy Cisco switches

Posted on January 29, 2019December 12, 2019

In our previous attempt we created a script that took a prepared text file containing switches ip addresses and ports to be switched to a dummy vlan, preventing access for anyone connecting without permission. In this one, we will take a “Reclaim Unused Up” report that is created from Cisco Prime LMS, the well known…

Python Script to change inactive cisco switch ports to a dummy vlan

Posted on January 21, 2019July 7, 2019

I am working on this script for a repetitive task we do at work. We often do a scan for inactive ports in building switches and if they are inactive for a long time, we set them to a dummy vlan that offers no ip connectivity to anyone connecting to it and turning on the…

Python script to search for certain mac address in Legacy Cisco enabled Campus LAN + Some History on my relationship with Network Automation

Posted on January 16, 2019July 7, 2019

Introduction Hello all. It’s been some time now that I have started learning about network automation/programming through the Cisco DevNet channel, learning about NetDevOps, CICD and all those magical notions, presented by various incredible people on the Cisco Devnet Team. Automation with Network Devices is not new to me. I have been experimenting for a…

Ansible Playbook for upgrading Ubuntu based Nagios Server to latest version

Posted on August 29, 2018December 12, 2019

Use Ansible to upgrade your Nagios Server

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Recent Posts

  • Ansible playbooks for Nagios Installation on Ubuntu 18.04.4 LTS / 20.04 LTS
  • Monitor VPN Users on Check Point Firewall with the help of Netmiko and Python, InfluxDB and Grafana
  • Migrating from MRTG/RRD/CGI to Grafana/InfluxDB/Telegraf on Docker containers for Enterprise Network Performance Monitoring with SNMP – Part 2
  • Migrating from MRTG/RRD/CGI to Grafana/InfluxDB/Telegraf on Docker containers for Enterprise Network Performance Monitoring with SNMP – Part 1
  • Campus Vlan Cleanup after DC upgrade / Using Netmiko +NTC-Templates
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