Troubleshooting: Devising A Testing Methodology
Tony Fortunato describes the steps he took to track down the source of an application performance problem.
Dictionary: friendor
Friendor – a vendor person who pretends to be your friend but all they really want is your money / purchase order.
(Brutal)
The post Dictionary: friendor appeared first on EtherealMind.
Updated: Using Ansible Playbooks with Cisco VIRL
Some of the engineers building Ansible-with-VIRL lab in my Building Network Automation Solutions online course experienced interesting challenges, so I made the how-to instructions more explicit and added a troubleshooting section to the Using Ansible Playbooks with Cisco VIRL document. Hope you’ll find them useful.
Non-Interactive SSH use case with Python
Sometimes the best way to learn to do something useful with a scripting language is with a starting point and a real world use case. While I don’t consider myself a Python expert, I can usually figure out how to put things together and get a task accomplished. For this article I challenged myself to create a simple script that performs the following:
- Open a file for a list of devices and credentials
- Log in to each device in the file using the credentials found
- Remove the current NTP server (1.1.1.1)
- Add a new NTP server (2.2.2.2)
- Save the configuration
I am sharing the script below as an example. Note this Python file uses paramiko. Therefore that library needs to be installed (MAC users – sudo pip install paramiko)
NTPChange.py
import paramiko
####devices.txt format
#### username,password,host
#### username,password,host
qbfile = open("devices.txt", "r")
for aline in qbfile:
values = aline.split(",")
myuser = values[0]
mypass = values[1]
myhost = values[2].rstrip()
ssh = paramiko.SSHClient()
ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())
ssh.connect(myhost, username=myuser, password=mypass)
channel = ssh.invoke_shell()
stdin = channel.makefile('wb')
stdout = channel.makefile('rb')
stdin.write('''
conf t
no ntp server Continue reading
Fighting CLI cowboys with Napalm – An Introduction
A lot of people who aren’t familiar with Napalm tend to laugh nervously when you suggest they use it in their network. The name Napalm is partly based on getting that perfect acronym and partly a desire to incinerate the old way of doing things and move to network automation. This article is about explaining what Napalm is and what lies behind the acronym.
Continue readingSpousetivities at DockerCon 2017
DockerCon 2017 is coming up in mid-April in Austin, TX, and Spousetivities will once again be offering activities for folks traveling to Austin with conference attendees. This is Spousetivities’ second time at DockerCon, and Crystal has a great lineup of activities planned.
Here’s a quick preview of the activities organized for DockerCon:
- Trip to Magnolia Market (from HGTV’s “Fixer Upper”)
- Tour of LBJ State Park
- Visit to Fredricksburg
- Sightseeing through the Hill Country around Austin
- Lunch at the Salt Lick BBQ
Austin in the spring should be a great place to visit, and Crystal has some really enjoyable activities planned—it’s a great reason to bring your spouse, girlfriend/boyfriend, significant other, or family member with you to Austin when you come for DockerCon. Of course, the chance to win some great prizes is nice too…
Crystal’s blog post on the Spousetivities site has a few more details, and registration is open right now.