Containers

This article covers Istio Route Rules and telling Service Requests Where To Go. OpenShift and Kubernetes do a great job of working to make sure calls to your microservice are routed to the correct pods. What if, however, you want to customize the routing?

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Introducing conu - low-level python library for container scripting. conu gathers utilities that come in handy when creating tests, provides nice logging for troubleshooting and is easily extensible.

this is an introduction to Istio. Istio helps automate the developer time to implement a feature. The combination of code complexity and code heft (i.e. number of lines of code) can put a drag on an implementation. Istio is a better way.

It is deceptively simple to get started with Linux Containers, but how well do you really understand the underlying technology? Could you explain the architectural trade offs of container hosts, images, and application definitions within Kubernetes? This article is intended to help you build that knowledge.

Red Hat now supports Microsoft SQL Server running on RHEL Server. However, Red Hat doesn't provide an official docker image for MS SQL Server on RHEL. This post explains how to create a docker image for MS SQL Server on RHEL and run it on OpenShift.

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Learn how to containerize and automate SQL changes to micro databases using Flyway, Docker, Kubernetes on Openshift. Flyway is used to build on-the-fly a container that can connect to the containerized database to perform SQL updates using JDBC.

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The purpose of the article is to describe how to use Red Hat JBoss Developer Studio or JBoss Tools together with the OpenShift online starter platform.

Deploying to OpenShift

Graham Dumpleton

January 1, 2018

Get an in-depth tour of OpenShift®, the container-based software deployment and management platform from Red Hat® that provides a secure multitenant environment for the enterprise. This practical guide describes in detail how OpenShift, building on Kubernetes, enables you to automate the way you create, ship, and run applications in a containerized environment.

Learn how to debug Java applications running on the Red Hat OpenShift container platform inside the Red Hat Container Development Kit from Microsoft VSCode.

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This article would help to configure http2 protocol support for the camel-undertow component. Camel's undertow component use embedded undertow web-container of version undertow-core:jar:1.4.21. This version also supports the http2 connection. I have used camel version 2.21.0-SNAPSHOT from upstream https://github.com/apache/camel. Also, the curl version to test application using camel-undertow component is 7.53.1. This curl version supports --http2 flag for sending an http2 request. I have also used nghttp to test application from linux terminal. However, this article is not about http2...

Devnation Live session - Why you’re going to fail running Java on Docker

During the fall of 2017, we conducted a microservices survey with our Red Hat Middleware and Red Hat OpenShift customers. Here are eight interesting trends discerned by the results: I. Microservices are being used to re-architect existing applications as much as for brand new projects There seems to be a strong emphasis in the market by technology vendors for positioning microservices as being only for new projects. However, our survey reveals that organizations are also using microservices to re-architect existing...

Container images usually come with pre-defined tools or services with minimal or limited possibilities of further configuration. This brought us into a way of thinking of how to provide images that contain reasonable default settings but are, at the same time, easy to extend. And to make it more fun, this would be possible to achieve both on a single Linux host and in an orchestrated OpenShift environment. Source-to-image (S2I) has been introduced three years ago to allow developers to...

In this blog entry, I want to introduce a "different" way to work with OpenShift. In the typical way to deploy a Pod to OpenShift, we have available a set of very useful objects we have build/image configurations. This takes the pain from us by hiding the details about image construction but, sometimes we just want to see some code running in the cloud. Or we want to see if our service/application is able to interact with nearby services or...

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Dynamically Creating Java Keystores in OpenShift

Raffaele Spazzoli +1

November 22, 2017

Introduction With a simple annotation to a service, you can dynamically create certificates in OpenShift. Certificates created this way are in PEM (base64-encoded certificates) format and cannot be directly consumed by Java applications, which need certificates to be stored in Java KeyStores . In this post, we are going to show a simple approach to enable Java applications to benefit from certificates dynamically created by OpenShift. Why certificates Certificates are part of a PKI infrastructure and can be used to...

The docker containerized environment is a software platform, which provides an abstraction of operating-system-level virtualization. To know more you can read this article: https://docs.docker.com/engine/docker-overview/ You need an available container-based application. Check the documentation for the right procedure for installation for your OS: https://docs.docker.com/engine/getstarted/step_one. Here, I am going to create a java application and run it by using a container-based application. This example includes the following steps: Create a directory by using below command. $ mkdir java-docker-application 2. Create a java...

With traditional virtualized infrastructure or Infrastructure-as-a-Service, it is common practice to regularly refresh instances back to a known good state. This provides confidence that the application workloads have the correct runtime configuration, no deltas are being introduced, and they can be relied upon to provide value for the business. In these cases, you might use tools such as Ansible or Jenkins, but when we move our application workloads to containers running on OpenShift Container Platform, we can use native tools...

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JBoss Tools 4.5.1 and Red Hat JBoss Developer Studio 11.1 for Eclipse Oxygen.1A are here waiting for you. Check it out! Installation JBoss Developer Studio comes with everything pre-bundled in its installer. Simply download it from our JBoss Products page and run it like this: java -jar jboss-devstudio-.jar JBoss Tools or Bring-Your-Own-Eclipse (BYOE) JBoss Developer Studio requires a bit more: This release requires at least Eclipse 4.7 (Oxygen) but we recommend using the latest Eclipse 4.7.1A Oxygen JEE Bundle since...

Need to lock down your Docker registry? Keycloak has you covered. As of version 3.2.0, Keycloak has the ability to act as an "authorization service" for Docker authentication. This means that the Keycloak IDP server can perform identity validation and token issuance when a Docker registry requires authentication. Administrators may now leverage the same user base, audit controls, and configuration mechanisms in Keycloak to extend their SSO ecosystem past OpenID Connect and SAML to cover Docker registries. The chart below...

No matter how many steps there are, it's always a journey and this story is no exception. It seems like a long trek, but in just 10 steps, you can find your cloud happiness. There are always ups and downs in any journey as you traverse the path you've chosen. This is no truer for a walk to the top of a ridgeline as much as for your digital journey into the cloud. As an application developer, or as an...

We know that containers in Openshift or Kubernetes don't persist data. Every time we start an application, it is started in a new container with an immutable Docker image. Hence, any persisted data in the file systems is lost when the container stops. Hence if an application or container is rebuilt or restarted than we can't view previous logs or if we are using containers with mysql or any other database then schema, tables, and all data will be lost...

In this session, Diógenes gives an introduction of the basic concepts that make OpenShift, giving special attention to its relationship with Linux containers and Kubernetes.

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The release of OpenShift Container Platform 3.6 brings support for vsphere cloud provider. This provides vsphere VMDK dynamic provisioning for persistent volumes for container workloads. The storage presented to vsphere virtual machines as a VMDK has ReadWriteOnce access mode. In the OCP 3.6 on vSphere reference architecture, much of this process is automated and can be implemented easily. Virtual Machine Disks or VMDKs exists in virtual machines. Configuring the OCP cluster for vsphere cloud provider support requires: Master Node Configuration...

Cloud readiness - This is a transcript of a session I gave at EMEA Red Hat Tech Exchange 2017, a gathering of all Red Hat solution architects and consultants across EMEA. It is

Making your images consumable - This is a transcript of a session I gave at EMEA Red Hat Tech Exchange 2017, a gathering of all Red Hat solution architects and consultants across EMEA. It is

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