The ramblings of a computer geek
The capture of network traffic can be useful in troubleshooting issues. Although it is possible to complete this on the switch itself your milage may vary. You require a machine with some packet capture software running and listening on the relevant network interface. XOS In this example we’ll be mirroring port 1 to port 10, … Read more
Although its becoming increasingly rare nowadays to be using un-encrypted connections, let’s see what it really means at the network level. Un-encrypted connections on their own are not necessarily a problem, its all about what value what you are sending has and therefore what could be exposed to a nefarious actor. If you are viewing … Read more
To install Docker on Ubuntu 22.04.2 LTS you can use these simple instructions, these are based on a standard Ubuntu 22.04.2 LTS installation and using a user called “ubuntu”. Once downloaded make sure it is executable with: Now run the installation with the following, the script has sudo commands added so you may need to … Read more
A simple HTML based status page tool that allows you as a system administrator to just edit a CSV file and have the tool generate you a pre-formatted HTML status page that you can upload to your favourite website. The tool uses Python to read the CSV files for the status (of services) and any … Read more
We had a VMware ESXi host start to display this following a networking instability issue. The host was checked and it did indeed have network redundancy, so this message was not correct, and appeared to be stuck warning about a condition that did not exist. Resolution is given in: https://kb.vmware.com/s/article/2008602, and in our case just … Read more
If you need to reboot a switch at a specific time, you can! Can be helpful for if you were performing a potentially disruptive configuration (where you might get cut off), you can set it to reboot after a specific period of time after you’re going to perform the configuration. Then if the configuration goes … Read more
Following on from my previous post: Static Website Hosting/Publishing Using AWS S3, AWS CloudFront, SSL Certificate And Custom FQDN, I had the need to ensure that a particular file was not cached by CloudFront and instead fetched each time. The particular example was that we wanted to use CloudFront, but in this case the website … Read more
A very quick overview of how you can use Python virtual environments. https://packaging.python.org/en/latest/guides/installing-using-pip-and-virtual-environments/ Install the Virtual Environment First install the virtual environment. Create the Virtual Environment Let’s say I have a project called “python-static-site”, so we’ll create the virtual environment within this project directory along with all the source files. The second argument is the … Read more
Assuming you’ve read and followed part 1, now on part 2 we’ll get our SSH keys created, and the gitlab-runner registered with gitlab as a “runner” so we can create our pipeline. Configuring the SSH Keys for Gitlab-Runner To make the local gitlab-runner on your machine have the correct keys, you need to generate them … Read more
Infrastructure as Code (IaC) is a useful way to maintain the configuration of your infrastructure components. It provides a way that you can store your infrastructure or application’s configuration in a versioned location and then coupled with CI/CD brings you the benefits of being able to enforce gatekeeping on any changes to the configuration, automate … Read more