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Red Hat: OpenShift, RHEL and More

Submitted by Roy Schestowitz on Tuesday 29th of October 2019 05:11:07 PM Filed under
Red Hat
  • A PodPreset Based Webhook Admission Controller

    One of the fundamental principles of cloud native applications is the ability to consume assets that are externalized from the application itself during runtime. This feature affords portability across different deployment targets as properties may differ from environment to environment. This pattern is also one of the principles of the Twelve Factor app and is supported through a variety of mechanisms within Kubernetes. Secrets and ConfigMaps are implementations in which assets can be stored whereas the injection point within an application can include environment variables or volume mounts. As Kubernetes and cloud native technologies have matured, there has been an increasing need to dynamically configure applications at runtime even though Kubernetes makes use of a declarative configuration model. Fortunately, Kubernetes contains a pluggable model that enables the validation and modification of applications submitted to the platform as pods, known as admission controllers. These controllers can either accept, reject or accept with modifications the pod which is attempting to be created.

    The ability to modify pods at creation time allows both application developers and platform managers the ability to offer capabilities that surpass any limitation that may be imposed by strict declarative configurations. One such implementation of this feature is a concept called PodPresets which enables the injection of ConfigMaps, Secrets, volumes, volume mounts, and environment variables at creation time to pods matching a set of labels. Kubernetes has supported enabling the use of this feature since version 1.6 and the OpenShift Container Platform (OCP) made it available in the 3.6 release. However, due to a perceived direction change for dynamically injecting these types of resources into pods, the feature became deprecated in version 3.7 and removed in 3.11 which left a void for users attempting to take advantage of the provided capabilities.

  • Verifying signatures of Red Hat container images

    Security-conscious organizations are accustomed to using digital signatures to validate application content from the Internet. A common example is RPM package signing. Red Hat Enterprise Linux (RHEL) validates signatures of RPM packages by default.

    In the container world, a similar paradigm should be adhered to. In fact, all container images from Red Hat have been digitally signed and have been for several years. Many users are not aware of this because early container tooling was not designed to support digital signatures.

    In this article, I’ll demonstrate how to configure a container engine to validate signatures of container images from the Red Hat registries for increased security of your containerized applications.

    In the lack of widely accepted standards, Red Hat designed a simple approach to provide security to its customers. This approach is based on detached signatures served by a standard HTTP server. The Linux container tools (Podman, Skopeo, and Buildah) have built-in support for detached signatures, as well as the CRI-O container engine from Kubernetes and the Red Hat OpenShift Container Platform.

  • Advanced telco services and better customer experience need modern support systems

    It seems nearly everything we do these days involves the internet – communication, commerce, entertainment, banking, filing taxes, home security, even monitoring our health – creating a wealth of opportunity for communications service providers (CSPs) to deliver innovative and advanced services, increasing and expanding their revenue streams. But it’s a significant challenge to do so using the traditional, proprietary and monolithic infrastructures in place for decades. To achieve success, it’s critical to modernize business and network systems with open source, cloud-native solutions, and move operations support systems (OSS) and business support systems (BSS) to microservices-based architectures.

    Red Hat believes that by transforming OSS/BSS to a more modern architecture, service providers will be in a better position to improve customer experience and create new revenue and business models, and operate more efficiently. But moving to a modern OSS/BSS architecture isn’t without challenges.

  • Red Hat Customer Success Stories: Automating management and improving communications security

    Datacom is a IT-based service provider in Asia Pacific with more than 5,000 staff and a vision of designing, building, and running IT systems and processes that are aligned to its clients’ business goals. As a Red Hat Advanced Business Partner, Datacom provides solutions to its market across Red Hat's product lines.

    Because Ansible was getting the attention of many Datacom customers, the company chose to focus on using Ansible as the orchestration glue for automation. Datacom constructed the platform which made it easily consumable while allowing customers to leverage the automation elements. Datacom is witnessing application developers use the infrastructure stack to deploy the apps on different technologies.

    Joseph Tejal is Datacom’s Red Hat Certified Specialist in Ansible Automation based in Wellington. Tejal explained that it wasn’t by chance that Datacom standardized on Red Hat Ansible Automation.

»

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