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What is flannel?

Flannel acts as a dedicated virtual networking layer specifically designed for containerized applications. When working within the OpenShift Container Platform, it can serve as an alternative networking solution to the conventional software-defined networking (SDN) components. This method proves especially beneficial for OpenShift deployments in cloud settings that also utilize SDN technologies, such as OpenStack, by eliminating the need for redundant packet encapsulation between the two systems. Each flanneld agent is responsible for sending information to a centralized etcd store, which allows other agents on different hosts to efficiently route packets to various containers within the flannel network. Furthermore, the accompanying diagram illustrates the architecture and data flow that facilitate communication among containers operating over a flannel network. This configuration not only boosts overall network performance but also streamlines the management of containers in intricate environments, ultimately leading to better resource utilization and operational efficiency.

What is Submariner?

With the growing adoption of Kubernetes, businesses are increasingly recognizing the importance of managing and deploying multiple clusters to ensure vital functionalities like geo-redundancy, scalability, and fault isolation for their applications. Submariner allows applications and services to function effortlessly across different cloud providers, data centers, and geographic areas. To kick off this process, a Broker must be established on a single Kubernetes cluster, with the API server of this cluster being accessible to all other clusters linked via Submariner. This Broker can be hosted on a dedicated cluster or any of the existing connected ones. After Submariner is installed on a cluster with the necessary Broker credentials, it enables the sharing of Cluster and Endpoint objects between clusters by utilizing methods such as push, pull, and watching, thus creating connections and pathways to other clusters. It's vital that the worker node IP addresses in all linked clusters are outside the Pod and Service CIDR ranges to avoid conflicts. By adhering to these requirements, teams can fully leverage the advantages offered by multi-cluster configurations. This strategic approach not only enhances resilience but also optimizes resource allocation across diverse environments.

Media

Media

Integrations Supported

Kubernetes
Mirantis Kubernetes Engine
OpenStack
Red Hat OpenShift

Integrations Supported

Kubernetes
Mirantis Kubernetes Engine
OpenStack
Red Hat OpenShift

API Availability

Has API

API Availability

Has API

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Pricing Information

Pricing not provided.
Free Trial Offered?
Free Version

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Supported Platforms

SaaS
Android
iPhone
iPad
Windows
Mac
On-Prem
Chromebook
Linux

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Customer Service / Support

Standard Support
24 Hour Support
Web-Based Support

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Training Options

Documentation Hub
Webinars
Online Training
On-Site Training

Company Facts

Organization Name

Red Hat

Date Founded

1993

Company Location

United States

Company Website

docs.openshift.com/container-platform/3.4/architecture/additional_concepts/flannel.html

Company Facts

Organization Name

Submariner

Company Website

submariner.io

Categories and Features

Categories and Features

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