This blog is a platform for me to share my knowledge in the area of software development.
In this post, you will learn how to create a Docker image for your GraalVM native image. By means of some hands-on experiments, you will learn that it is a bit more tricky than what you are used to when creating Docker images. Enjoy!
Continue reading “How to Create a GraalVM Docker Image”
Encountered a ‘Permission Denied’ error on a file copied to a Docker image or when accessing a file on a mounted volume within a Docker container? In this blog, you will learn why you get a ‘Permission Denied’ error and how to solve it. Enjoy!
Continue reading “Docker Files and Volumes: Permission Denied”
In this blog, it is explained how to configure Jenkins Multibranch Pipelines when using Git LFS. This seems to be a non-issue at first sight, but the documentation is quite dispersed and no clear steps can be found how to configure this. Also, a troubleshooting section can be found at the end of the blog.
Continue reading “Jenkins Multibranch Pipeline and Git LFS”
In this blog, you will learn how to use Amazon Simple Queue Service (SQS) in a Spring Boot App. You will use the AWS SDK for Java for this purpose. Most of the SQS features, which can also be executed manually via the AWS console, will be covered within this blog.
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In the previous post, you learnt how to deploy a basic Dockerized Spring Boot application to AWS Fargate. Wouldn’t it be great if this manual configuration could be provisioned from a plain text file which can be part of your version control system? With a single action, all necessary resources are configured in the right order. In this post, you will learn how to create an AWS CloudFormation template. Enjoy!
Continue reading “How to Create an AWS CloudFormation Fargate Template”
In this post, we will take a look at how we can make services be aware of each other without knowing their exact location. We will make use of Eureka Server which will act as a Discovery Server. Being Spring fans, we will do so by means of Spring Eureka.
Continue reading “Discover Your Services With Spring Eureka”
In a previous post, we talked about how we can check our Docker images for any known vulnerabilities by means of Anchore Engine. This still required a manual action. Wouldn’t it be great if we could incorporate Anchore Engine into our Jenkins CI build job or pipeline? In this post, we will take a look at how we can accomplish this by means of the Anchore Container Image Scanner Jenkins Plugin.
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In the first part of this post, we explained the Performance Diagnostic Methodology (PDM) and how to use it. But, the proof of the pudding is in the eating and therefore it is now time to apply the methodology. Of course, the best proof would be to apply the methodology to a real world performance issue, but instead of waiting for that, we will try to simulate some performance issues and verify whether the methodology can work.
Continue reading “How to Solve Your Java Performance Problems (Part 2)”
Last June I saw an interesting conference talk at J-Spring given by Martijn Verburg (from jClarity) about the Performance Diagnostic Methodology (PDM), a structured approach in order to find the root cause of Java performance problems. In this post I will try to highlight the key concepts but I do recommend watching a recording of the talk from Devoxx UK. In the next part of this post, we will try to apply the theory to some problem applications.
Continue reading “How to Solve Your Java Performance Problems (Part 1)”