In a previous blog post, I detailed how to install four very useful Kubernetes tools on your macOS or Windows machine. Those tools—kubectl, stern, kubectx, and kubens—are must-haves for the advancing developer, as well as any folks in operations. What I failed to do previously, however, was include instructions for installing these tools on Linux. So… here we are.
Continue reading “4 command-line tools for Kubernetes: Linux edition”
The 2019 Stack Overflow Developer Survey results show that more than 40% of respondents say a distracting work environment is the biggest challenge to productivity. What distracts you most in your work environment?
Continue reading What is your biggest work environment distraction?
Red Hat JBoss BPM Suite offers a really flexible BPMN engine that can be extended with Custom Reusable Services. Most users know them as
Work Item Handler (the technical implementation name), but few of them know that it’s possible to expose them in a comfortable list of reusable services. In fact, you can create a repository of services and simplify the life of the BPMN designer that can easily pick and choose the right service.
Continue reading “Extend Red Hat JBoss BPM Suite through the Service Repository”
The OpenShift Online Starter platform is available for free: visit https://manage.openshift.com/. It is based on Red Hat OpenShift Container Platform 3.7. This offering allows you to play with OpenShift Container Platform and deploy artifacts. The purpose of the article is to describe how to use Red Hat JBoss Developer Studio or JBoss Tools together with this online platform.
Continue reading “Develop and Deploy on OpenShift Online Starter using Red Hat JBoss Developer Studio”
Previously I did a post on Securing AMQ7 Routers with SSL. This post will expand upon that and explain how to secure JBoss AMQ7 Brokers with SSL and how to connect the routers and brokers with SSL as well.
Continue reading “Securing AMQ7 Brokers with SSL (part 2)”
SystemTap 3.2 includes an early prototype of SystemTap’s new BPF backend (stapbpf). It represents a first step towards leveraging powerful new tracing and performance analysis capabilities recently added to the Linux kernel. In this post, I will compare the translation process of stapbpf with the default backend (stap) and compare some differences in functionality between these two backends.
Continue reading “Introducing stapbpf – SystemTap’s new BPF backend”
Kotlin coroutines is one of the major features of Eclipse Vert.x 3.5.
Most of us are used to writing interactive code and going the reactive way is not a trivial paradigm shift for everyone: programming using asynchronous APIs can be more challenging than using a direct synchronous style, in particular, if you have several operations that you want to do in sequence. Also, error propagation is often more complex when using asynchronous APIs.
Continue reading “Inter-Reactive Kotlin Applications”
Recently I’ve received a question from a customer who would like to restrict user permission in OpenShift Container Platform in order to be compliant with his company’s security policies.
OpenShift has rich and fine-grained RBAC capabilities out of the box, which gives you the possibility to setup exactly who can do actions (verbs in OpenShift word) on every kind of resource.
Before we begin to dive deep into this topic, I have provided links to some resources I think will be of use to help better understand the concepts of roles, roles scope, RoleBinding, groups, etc.
Continue reading “How to customize OpenShift RBAC permissions”
Open vSwitch is growing every day and being used in large-scale deployments. Usually, that means there are few ports configured in the vswitch that will be always available, like physical Ethernet ports and several other ports providing networking connectivity to virtual machines or containers. Those other ports are software devices and very often they cannot be reused after a reboot or a system crash for example.
This blog post will talk about how to make sure the vSwitch comes up clean after a system crash or bad shutdown. The idea is that once vSwitch is up, there is no need for another component (usually a remote controller) to iterate over a large number of stale ports and clean them up.
Continue reading “Open vSwitch without stale ports”
Container Native Storage (CNS) is implemented in OpenShift as pods. These pods are created from a template that is built into OpenShift. After an automated install, we want to make sure we have the latest template, and the latest containers when using the Advanced Installer. While typically this is a multi-step manual process, an Ansible Script makes this a lot simpler.
Continue reading “Example of using Ansible to update Container Native Storage”