Target audience The article is focused on infrastructure cost optimization with the usage of AWS EC2 Spot instances in AWS EKS clusters. Some knowledge and experience with both AWS and Kubernetes environment is desirable to properly understand the presented concepts and solutions. Introduction to AWS EKS service AWS EKS which stands for Elastic Kubernetes Service…
One big challenge in a monorepo is to determine which components need to be rebuilt and consequently – deployed. The market offers us a couple of solutions, with Bazel ahead. All of them force repository owner (and users) to make enormous adaptations to build a system. Long-term earnings from using unified system pays-off, but could…
Recently, AWS added support for External Deployment Controllers for ECS Services. What does it mean for ECS users? We have received long-awaited possibility to control the deployment process from scratch, leveraging techniques like canary deployment. In regards to ECS, there are three main concepts essential to manage containers scheduling: Task Definitions Task Sets Services Task…
As we announced in the previous blog post over the last few months we have been working on the tool, which will make using CloudFormation way easier. We are aware of lots of difficulties assigned to creating infrastructure with the help of CloudFormation, that is why we want to present you our brand new tool…
Next up in our series of developer tools is JMap. There are plenty of errors or issues that might go wrong with your Java application, but there is one that happens more often than others – OutOfMemoryError, related to Java objects memory issues. Once your application throws one of these, your first target is Java…
There are a lot of different Linux tools that can be used to profile and instrument executables. Some of them are non-intrusive and do not require any modification of our source code or build process, even sometimes do not introduce any runtime overhead. Others can increase the time needed to execute code up to few…
Over the course of your day as a developer, you use many tools. Appliscale engineers have a few favourites they would like to share with you over the coming weeks. First up is a dive into /proc. Over the next few posts, we will also look at Jmap, Gprof and Netstat. /proc You may wonder,…