In this article, I discuss containers, but look at them from another angle. We usually refer to containers as the best technology for developing new cloud-native applications and orchestrating them with something like Kubernetes. Looking back at the origins of containers, we’ve mostly forgotten that containers were born for simplifying application distribution on standalone systems.
In this article, we’ll talk about the use of containers as the perfect medium for installing applications and services on a Red Hat Enterprise Linux (RHEL) system. Using containers doesn’t have to be complicated, I’ll show how to run MariaDB, Apache HTTPD, and WordPress in containers, while managing those containers like any other service, through systemd and
Additionally, we’ll explore Podman, which Red Hat has developed jointly with the Fedora community. If you don’t know what Podman is yet, see my previous article, Intro to Podman (Red Hat Enterprise Linux 7.6) and Tom Sweeney’s Containers without daemons: Podman and Buildah available in RHEL 7.6 and RHEL 8 Beta.
Continue reading “Managing containerized system services with Podman”
Today I want to talk about Ansible Service Broker and Ansible Playbook Bundle. These components are relatively new in the Red Hat OpenShift ecosystem, but they are now fully supported features available in the Service Catalog component of OpenShift 3.9.
Before getting deep into the technology, I want to give you some basic information (quoted below from the product documentation) about all the components and their features:
- Ansible Service Broker is an implementation of the Open Service Broker API that manages applications defined in Ansible Playbook Bundles.
- Ansible Playbook Bundles (APB) are a method of defining applications via a collection of Ansible Playbooks built into a container with an Ansible runtime with the playbooks corresponding to a type of request specified in the Open Service Broker API specification.
- Playbooks are Ansible’s configuration, deployment, and orchestration language. They can describe a policy you want your remote systems to enforce, or a set of steps in a general IT process.
Continue reading “Customizing an OpenShift Ansible Playbook Bundle”
Today I want to introduce you to some features of OpenShift 3.6 while giving you the chance to have a hands-on experience with the Release Candidate.
First of all:
- It’s a Release Candidate and the features I’ll show you are marked as Tech Preview, so use them for testing purpose ONLY!
- We cannot use Minishift just because there is no Minishift updated yet. Anyway, I’ll show how could use its base iso-image.
- I don’t want to use ‘oc cluster up’ in a virtual machine just because setting up a virtual machine, to run it, would be a waste of time.
Continue reading “OpenShift 3.6 – Release Candidate (A Hands-On)”