- #What is kubernetes and why it is used driver
- #What is kubernetes and why it is used code
- #What is kubernetes and why it is used free
A volume can support all types of storage, including network file system (NFS), local storage devices, and cloud-based storage services. Volumes are basic entities in Kubernetes, used to provide storage to containers. CSI provides an extensible plugin architecture, so you can easily add plugins that support the storage devices and services used in your organization.
#What is kubernetes and why it is used driver
Before CSI, users needed to integrate the data store’s device driver with Kubernetes, which was quite complex.
Related content: read our guide to hybrid cloud architecture Container Storage Interface (CSI)ĬSI is a Kubernetes extension that simplifies storage management. Kubernetes provides mechanisms to abstract this storage for applications running on containers, so that applications never communicate directly with storage media. This can include file, block, or object storage services from cloud providers (such as Amazon S3), storage devices in the local data center, or data services like databases. Kubernetes supports multiple types of persistent storage. Each container has ephemeral storage by default-this storage uses a temporary directory on the machine that hosts the Kubernetes pod. In Kubernetes, the most basic type of storage is non-persistent-also known as ephemeral.
In these cases, containers must have a location to permanently store information, which should outlive the lifespan of an individual container. For example, applications that need to share information or maintain state cannot lose this information. Immutability is not always appropriate, however. This means that when containers are destroyed, including all data created during the lifetime of the containers. Persistent Volumes (PV) and Persistent Volume Claims (PVC)Ĭontainers use the principle of immutability.If properly managed, the Kubernetes storage framework can be used to automatically provision the most appropriate storage to multiple applications, with minimal administrative overhead. This makes it possible to create dynamic storage resources that can serve different types of applications. When managing containerized environments, Kubernetes storage is useful for storage administrators, because it allows them to maintain multiple forms of persistent and non-persistent data in a Kubernetes cluster. It provides services and management capabilities needed to efficiently deploy, operate, and scale containers in a cloud or cluster environment.
#What is kubernetes and why it is used free
And vice versa - Kubernetes can automatically scale the number of pods down when the server load is decreasing.Kubernetes is a free and open-source container orchestration platform. The same thing happens when 200 users suddenly become 2,000 - the necessary number of pods can automatically come into play right when they are needed. Pods run by Kubernetes are stateless by default this means that if, at any moment in time, one of them is down, the end user won’t notice a thing on their side as their request will be immediately processed by another pod. Out-of-the-box autoscalingįeatures such as networking, load balancing, and replication are available on Kubernetes out-of-the-box. Besides, if a node is down for a certain reason, Kubernetes will simply re-create the pods running on that node and launch them on another one so no data will be lost. When Kubernetes sees that nodes don’t work to their fullest capacity, it redistributes pods among them to shut the unused nodes down and stop wasting resources. Kubernetes helps save costs and utilize memory and processor resources efficiently Besides, you don’t have to keep in mind what language and frameworks were used to write an app as it is packaged into a container with everything it needs (runtime, libraries, etc.) to be safely migrated and deployed in any environment. That’s why they start and end work quicker and utilise disk, memory, and processor capacities more efficiently.
Unlike virtual machines, containers don’t have to run through the entire cycle of the operating system launch. Applications inside a container are isolated from the rest of the host system and always run in the same way, regardless of the environment.
#What is kubernetes and why it is used code
Simply put, a container is a package that contains an application code and all its dependencies needed to launch the app. However, as a result of putting slightly more effort into the initial setup, you get a scalable, flexible, and durable Cloud platform well-suited for microservices. At first sight, Kubernetes might seem like rocket science compared to Docker Compose. If you haven’t been living under a rock for several months now, you’ve probably heard about Kubernetes, aka Kube or K8s, one of the best container orchestration tools on the market. Seriously, what is so special about container orchestration tools? Let’s unpack Kubernetes and see what it has in store.
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