About the Author

Rafal Leszko

Rafal Leszko

Cloud Software Engineer

Rafał is a passionate software engineer, trainer, conference speaker, and author of the book, Continuous Delivery with Docker and Jenkins. He specializes in Java development, cloud environments, and continuous delivery. Prior to joining Hazelcast, Rafał worked with a variety of companies and scientific organizations, including Google, CERN, and AGH University of Science and Technology.

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Hazelcast Discovery Auto Detection

Rafal Leszko
by Rafal Leszko

Hazelcast was always well integrated with all cloud environments thanks to discovery plugins like Hazelcast AWS Plugin or Hazelcast Kubernetes Plugin. With the IMDG 4.1 release, however, we went one step further in making Hazelcast as user friendly as possible. Hazelcast can now automatically discover the environment it is running in and find a suitable […]

Build Your Kubernetes Operator with the Right Tool

Rafal Leszko
by Rafal Leszko

You want to build a Kubernetes Operator for your software. Which tool to choose from? Operator SDK with Helm, Ansible, or Go? Or maybe start from scratch with Python, Java, or any other programming language? In this blog post, I discuss different approaches to writing Kubernetes Operators and list each solution’s pros and cons. All […]

Spring Boot: Hazelcast for Session Replication

Rafal Leszko
by Rafal Leszko

NOTE: This is an updated version of a previous blog. This article contains updated information. You can use Hazelcast for HTTP session replication between multiple replicas of your Spring Boot application. For example, imagine that you have a classic example of an online shop with customer’s items stored in the session. Users start to add […]

Caching with Spring Boot and Hazelcast

Rafal Leszko
by Rafal Leszko

NOTE: This is an updated version of a previous blog. This article contains current information. Spring Boot is very well integrated with Hazelcast. It’s enough to provide Hazelcast configuration on the classpath and it will be automatically used. In this blog post I’ll explain step-by-step how to enable Hazelcast as a cache manager for your […]

How to set up Hazelcast on AWS ECS

Rafal Leszko
by Rafal Leszko

Hazelcast IMDG can be fairly simply configured to work on AWS ECS. This Blog Post presents this process step by step.

AWS Auto Scaling with Hazelcast

Rafal Leszko
by Rafal Leszko

Learn how to set up a Hazelcast cluster on AWS Auto Scaling group.

Hazelcast Helm Chart

Rafal Leszko
by Rafal Leszko

Learn how to use Hazelcast Helm Chart

Securing Hazelcast with Cert-Manager

Rafal Leszko
by Rafal Leszko

Cert-Manager became a standard way for issuing and rotating certificates in Kubernetes and OpenShift environments. Simple to install. Simple to use. Well integrated with Vault and other secret managers. No surprise it’s the way to go if you want to set up secure communication between your applications! In this blog post, I show how to […]

How to Set Up Your Own On-Premises Hazelcast on Kubernetes

Rafal Leszko
by Rafal Leszko

Hazelcast loves Kubernetes. Thanks to the dedicated Hazelcast Kubernetes plugin, you can use dynamic auto-discovery. Hazelcast on Kubernetes can also run in multiple topologies: embedded, client-server, or as a sidecar. What’s more, thanks to the Helm package manager and the dedicated Hazelcast Helm Chart, you can deploy a fully functional Hazelcast server in literary minutes. […]

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