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The Kubernetes API can be extended using Custom Resources, which represent objects that are not part of the standard Kubernetes installation. These custom resources are declared using Custom Resource Definitions (CRDs), which is a kind of resource that can be dynamically registered and unregistered without shutting down or restarting a cluster ...
The term "ansible" was coined by Ursula K. Le Guin in her 1966 novel Rocannon's World, [4] and refers to fictional instantaneous communication systems.[5] [6]The Ansible tool was developed by Michael DeHaan, the author of the provisioning server application Cobbler and co-author of the Fedora Unified Network Controller (Func) framework for remote administration.
TiDB can be deployed in a Kubernetes-enabled cloud environment by using TiDB Operator. [14] An Operator is a method of packaging, deploying, and managing a Kubernetes application. It is designed for running stateful workloads and was first introduced by CoreOS in 2016. [ 15 ]
This level of control enables the cluster to support upgrades and patches of the control plane nodes with minimal effort. The compute nodes can be running Red Hat CoreOS, RHEL or even Windows. OpenShift introduced the concept of routes - points of traffic ingress into the Kubernetes cluster. The Kubernetes ingress concept was modeled after this ...
Docker is a set of platform as a service (PaaS) products that use OS-level virtualization to deliver software in packages called containers. [5] The service has both free and premium tiers. The software that hosts the containers is called Docker Engine. [6] It was first released in 2013 and is developed by Docker, Inc. [7]
That is like the ansible universe in Ursula K. LeGuin's early Hainish novels. Since I needed to use exactly that rule set, why not use the word — an excellent word — which I apply in the same way we all say 'robot,' an invented word that has entered the language, [and thereby] pay tribute to the writer from whose works I learned the word. [10]
The Red Hat Cluster Suite (RHCS) includes software to create a high availability and load balancing cluster. Both can be used on the same system although this use case is unlikely. Both products, the High Availability Add-On and Load Balancer Add-On, are based on open-source community projects. Red Hat Cluster developers contribute code ...
The certification has a heavy focus on automation using Ansible. To achieve the RHCE certification, the student must pass the RHCSA exam, EX200 , and in addition EX294 , a 4-hour hands-on lab exam. Red Hat recommends preparing for the exam by taking courses in Linux essentials (RH124), Linux administration (RH134), and Linux networking and ...