Openscad Magnifying Glass

How I fixed a magnifying glass by creating an original frame

2025-03-29 · Cameron Kerr

DIY Phone Case: as easy as 1, 2, Minkowski!

It’s easy to create a phone case when there are none on the market

2025-03-06 · Cameron Kerr

OpenSCAD: More Satisfying than you Think!

An introduction to OpenSCAD to encourage you to try it out

2025-01-31 · Cameron Kerr

Bloom Filter Lightning Talk

A Lightning talk I gave to Dunedin Code Craft in November 2024

2024-11-04 · Cameron Kerr

3d Print and Paint Ocarina

A fun modern craft and music project

2024-09-07 · Cameron Kerr

Profiling PostGIS with PLProfiler

PLProfiler is a great tool for profiling PL/PGSQL functions, but you need an extra trick for PostGIS native functions.

2024-02-01 · Cameron Kerr

Ergodox EZ vs Kinesis Advantage

I’ve been a delighted Kinesis Advantage user for over 10 years. I purchased the Ergodox EZ as a second keyboard for hybrid work. Now its time to replace my Kinesis. Let’s compare!

2023-08-22 · Cameron Kerr

Using Common Expression Language (CEL) in... a Metrics Exporter for LDAP

Use the Common Expression Language (CEL) to allow user-friendly flexible policy rules. Show this with YAML to group/filter data to expose as metrics.

2023-08-15 · Cameron Kerr

Reimplementation of Learning :: a Python to Go Retrospective

PoC coding and reimplementation of Python and Go for metrics and log parsing using an example of 389 Directory Service.

2023-08-15 · Cameron Kerr

Syft your Linux Fleet Looking for Shellshock, Log4J.... and Oracle Java?

I explore using Syft and Grype, demonstrate use of jq and Go’s text templates, and explore using Syft against a server rather than a container.

2023-06-19 · Cameron Kerr

Managing the Performance of Grafana/Prometheus Dashboards using Nginx & Lua

Regain visibility into the performance of Open Source Grafana and Prometheus so you know which dashboards and visualisations are slowing down your Prometheus service.

2023-03-24 · Cameron Kerr

Map Git Dependencies using n-grams in Python

Where in Git would I go to edit the code that deploys a set of resources identified by audit findings?

2023-01-25 · Cameron Kerr

Amazon EFS Top-Talkers

Use Amazon’s VPC flow logs (similar to NetFlow) to identify NFS clients and servers and enrich that IP-level information with useful names so you can recognise EC2 instances, EFS endpoints etc.

2022-11-22 · Cameron Kerr

Job Hunting for Senior IT Roles

Some observations from successful job hunting for those wanting a remote role or to pivot in the industry. Meant for more senior roles, where the funnel should be smaller.

2022-02-07 · Cameron Kerr

Deploying with Ansible when Outgoing Access to Internet is Unavailable (BYO proxy)

Network gynmastics using SSH and a local proxy for servers that don’t have internet access but still need to ‘yum update’ etc.

2018-01-25 · Cameron Kerr

Limiting Access via Squid to Docker Containers

I wanted to grant just the access needed for different Docker containers through Squid. I used Squid’s ability to use Ident as a way to look up a ‘user’ for a connection, and made a custom identd server to provide this information.

2017-11-02 · Cameron Kerr

Capturing and Replaying Connection-less Protocols (eg. IPFIX into Logstash)

Capture real-world network traffic so you can replay it later / elsewhere for development and testing. An example is given using IPFIX (AppFlow), but directly relevant to UDP Syslog too.

2017-04-25 · Cameron Kerr

Point a single process to /dev/urandom instead of /dev/random

Giving a single process (tree) a different view of the filesystem without modifying the process; and showing how to do this manually and via Ansible.

2017-03-23 · Cameron Kerr

Memcached logging (and others) under Systemd on RHEL7

How to cleanly gather logs for memcached.

2015-08-04 · Cameron Kerr

The importance of being liberal in a Cisco environment

Network incompatibilities do happen and sometimes you need to be a little more forgiving in order to let the traffic flow. An example of where some Cisco behaviour was running foul of Linux.

2015-05-05 · Cameron Kerr