How to make your system robust against your worst nightmare–your future self
In this post, I talk about some strategies that I’ve learned to simplify class structures in Java services that load and persist data into data stores like DynamoDB or RDS at the same time making the codebase safer.
As always, my opinions are my own.
At Amazon, I ended up joining two teams that were suffering under the technical debt.Artwork by Sami Lee.
For the last 5+ years, I’ve been tracking my various aspects of my personal health using Samsung Health. It helps track weight, calories, heart rate, stress, and exercise and stores all of it in the app.
However, the app only gives some basic high level charts and insights. Luckily, it enables you to export your personal data into CSV files that you can then import into your tool of choice and perform any kind of analytics.Ever wondered where the energy is going in your house and know exactly when and which circuit is consuming the most electricity? How much is your air conditioning unit costing you each month in kWh?
Home energy monitors are devices that you can use to monitor how much energy you’re using at any given point in time. You can use them to figure out how much each device or circuit you’re using overnight vs the day.In addition to my home lab K8s cluster, I have two dedicated servers that I run in the cloud running a separate Kubernetes cluster. This cluster runs my production servers, like this blog, Postfix, DNS, etc. I wanted to add a VPN between my home network and my prod k8s network for two reasons:
All data should be encrypted between these networks. While I use HTTPS when possible, some traffic like DNS isn’t encrypted My servers outside the NAT should be able to access servers running behind my NAT.I recently helped my friends configure their CenturyLink Gigabit fiber service so they can use their own hardware instead of the provided hardware. This gave them a lot of flexibility in how the network is configured, however CenturyLink requires you to enable PPPoE and use 6RD to use IPv6 instead of natively supporting IP packets, you have to jump through hoops. I’m sure there’s some reason why their network works like that, but I figured I’d document what needs to be done and explain how it works.