danielmacuare

#!/bin/bash
# Function that will expect a list of arguments from the cli and will resolve them using the host command.
# It will return the dns records or Ips on stdout
# Example bash hosts_cmd.sh 10.176.148.12 10.176.148.193 10.176.152.63 10.176.152.64 10.176.152.65 10.176.152.66 10.176.152.67 10.176.152.68 10.176.152.69 10.176.152.70 10.176.152.71 10.176.152.72

#USAGE
# bash hosts_cmd.sh 10.195.129.22 10.195.129.23 10.185.129.62 10.185.129.63


light_green_bold="\033[1;92;49m"

danielmacuare

BEFORE START WORKING
Git fetch origin                    # Origin is the place from where you cloned your repository.
Git merge origin/master             # Merge origin/master into your current branch.
git pull                            # Same


AFTER FINISH WORKING
git add 
git commit -m "Commit message"
Git fetch origin                    # In case the remote could be ahead of you. Origin is the place from where you cloned your repository.

danielmacuare

isc-dhcp-server

The following commands have been tested on Ubuntu 16.04
uname -a
Linux ubuntu 4.4.0-145-generic #171-Ubuntu SMP Tue Mar 26 12:43:40 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

Process

0 - Install the tool sudo apt-get install isc-dhcp-server

danielmacuare

Napalm get_facts to Nornir

The purpose of this gist is to gather facts from a network device with Napalm and Nornir alike.
This will help us understand how to use tasks in Nornir.

Considerations

• We will be using Telnet to connect to our devices. By default, Napalm uses SSH to connect (See Napalm optional args) to the IOS devices. For this reason, we will need to pass optional_arguments when instantiating the Napalm driver object.
• r2 can be replaced with the device ip. In my case, I was working with host files in my OS.

Napalm Script

danielmacuare

Nornir - Tutorial

https://nornir.readthedocs.io/en/stable/index.html

1 - Initialise a Nornir Object.

  r = InitNornir(config_file='config.yaml')
  nr = InitNornir(config_file='config.yaml', core={'num_workers': 1})		# Useful for testing as it works in serial, doesn't paralellise connections.

2 - Filtering Objects - Can be cumulative.

danielmacuare

Python - Building from source (Updated Dec 2020)

The following commands will help you to install Python 3.9.1 on a Centos 7 or Ubuntu 18.04 machine.

1 - Select the Python version you'll install.

https://www.python.org/ftp/python/ - We'll select the latest version as of Dec 2020 (3.9.1)

2 - Installing Python.

On Centos 7

sudo yum install gcc openssl-devel bzip2-devel libffi-devel

danielmacuare

Markdown Tutorial

• TOC
• Headers
• Quotes
• Emphasis
• Section dividers
• Lists (- or * or +)
• Links (hrefs)
• Images (!) Before the link
• Code

danielmacuare

Method 1 - With basicCofig() (Logging to a file)

#!/usr/bin/env python3
import logging

def conf_logging(log_sev='WARNING'):
    log_format = "[%(name)s]-[%(levelname)s]-%(asctime)s-[%(funcName)s]-%(message)s"
    datefmt='[%d/%m/%y]-[%H:%M:%S]'
    file='dotfiles.log'
    

danielmacuare

Python Docstrings

Type of Docstrings

• Google docs
• Restructured Tect (reST)

Examples

• Google Dosctrings

danielmacuare

#!/usr/bin/env python3
import yaml
from jinja2 import Environment, FileSystemLoader, PackageLoader, StrictUndefined

# Docs: https://jinja.palletsprojects.com/en/2.11.x/api/#basics

# Functions
def render_yaml_template(yaml_file, jinja_template, output="files/sshd_config"):
    """
 This takes a yam file with all yor vars, a Jinja template and renders an output file