I last wrote about our tech stack 2 years ago. There hasn’t been a huge change. We’ve been moving slow and steady. Our migration from PHP/Yii to JavaScript/React is not yet complete but we’re slowly getting there. 3 years on and we’re 40% done. Migrating…
We use a HorizontalPodAutoscaler Kubernetes resource to scale Pods that work off items from our AWS SQS queues. We found the scale-up to be very aggressive and wondered whether the new version would help. I couldn’t find any documention about the syntax change in v2beta2…
Has our Tech stack remained the same since 2 years ago when I last wrote about it? Hell no! Our website pages are now served by 2 distinct tech stacks. We use a AWS ALB to sniff the request and send either to our “Legacy”…
We have been running containerised apps since early 2014 so in theory, moving to Kubernetes should be easy. The problem is that we currently make use of the –volumes-from docker flag to share volumes between containers of the same app. For example, a common pattern…
We are playing with the new Elastic Container Service for Kubernetes from Amazon (EKS) and have found it interesting that instead of using a overlay network like we have been used to in previous Kubernetes experiments, they are assigning IP addresses to each Pod via…
Overview The past year, PeoplePerHour has entered the microservices arena, containerising its platform and separating it into services. On the process of doing so, we realised how much we lacked message buses and long running daemons to process requests, either real time or in an…
A new stable version of CoreOS, the Operating System we use on our AWS instances, came out recently – v899 and docker was upgraded from v1.7 to v1.9.1. This means, it’s now much easier to find docker volumes that are no longer being used by…
The key value proposition of Docker is that once you build a container image, you can run it anywhere. I like the way Adrian Mouat puts it: > What is Software: program Q, when given input P, will produce output R. >HOWEVER: One of the…
One of the most vicious and hard to detect issues in database performance deterioration is I/O. When the I/O of a database is lagging there are multiple and unpredicted issues occuring. Some of the most common are: Increased amount of slow queries Write operations get…
Enabling cors using nginx is simple… if you have done it once. This is a small and quick-start example of how it can be done and how you can restrict access to a specific number domains. Gotcha – SOS (read this if you want…