Increasing Connectivity in Multicloud Environments

What is Multi-Cloud?

Multi-cloud refers to a cloud deployment that includes several clouds.It's just the same as hybrid cloud, but the types of cloud infrastructure they include differ. A multi-cloud infrastructure combines many same-type clouds, whereas a hybrid cloud infrastructure combines multiple types of clouds.

Hybrid cloud environments and cloud-native apps are changing, and the app connectivity needs are also changing. Integrated approaches that jointly solve network and application connection problems are necessary to enable abstraction and observability throughout the environment.

This post demonstrates a fresh, complete application connection solution for hybrid cloud environments and the use cases and issues driving future cloud connectivity concerns.

The Advancement of Hybrid Cloud Connection

The hybrid cloud experience extends beyond a single cloud provider/host or a single Kubernetes cluster. In this scenario, applications can be deployed among several clusters, cloud providers, SaaS services, bare-metal hosts or on-premises virtual machines (VM). As a result, companies may be unable to reap the benefits of multi-cloud environments if they rely on a cluster as a fixed application barrier and link the application identity to the cluster.

A next-generation connection solution is required to fulfill hybrid cloud application connectivity requirements and reap the benefits of multi-cloud application deployment configurations.

This solution must give a typical architecture across clusters to allow developers to abstract where their applications execute and to open up apps for seamless mobility, replication and failover across clusters.

A worldwide networking reach is required for such an infrastructure, allowing traffic to move within and between clusters and across control planes, data and services. Telemetry, authentication, authorization, traffic management, observability and rate limitation are all application and business layer connection challenges that should be managed smoothly throughout the hybrid cloud environment.


While each publicly accessible app will need a type of ingress solution, ingress is not a fundamental feature and each supplier's approach may vary both in technology and features.If your apps must span many clusters,you must go above single cluster ingress and provide a global ingress load-balancing approach capable of routing traffic to those clusters.

Considerations for Application Connectivity

Consolidating Control Plane Case

Managing application deployment and connection in a multi-cloud/multi-cluster environment provides a set of unique problems for app developers and admins:


●A developer's workflow focuses on individual clusters: There isn't a common abstraction across multiple clusters,a group,cloud APIs or local development,resulting in one-time approaches to a cloud provider or each cluster.
●There is no standard API for multi-cloud connectivity:Administrators must configure rules for each cloud provider and cluster independently on distinct control planes and with different APIs.
●Migration between clusters and cloud services:A migration procedure is required when moving a program to a different cloud service or cluster.Because various cloud suppliers utilize distinct APIs and network access configurations,targeting another cloud service may necessitate a unique process or migration phase.
●Global policy management:It is necessary to define app-level policies such as authorization,rate restriction,mutual trust and service connection worldwide,even if the apps and dependencies are distributed across many settings.

Flawless or consistent single cluster or multi-cluster and cloud usage is critical for app developers.The addition of a control plane at the next level streamlines the general flow by abstracting the difficulty of working with various clusters across different cloud providers.This control layer may centralize policies and enforce limits based on organizational structure instead of the deployment platform's physical layout.

Data Plane Ingress and Policies

Customers have ongoing challenges when it comes to running the"next layer up"of identity/routing/ingress and access management(IAM).Several APIs and proxies from service mesh,ingress and API gateway solutions are now required.

Through a high-level API and extensions,a centralized data plane may bring these issues together as follows:


●API;a set of resources for connecting to services.Ingress enhancement:
●Role-based-clear roles that leverage and configure service connectivity
●Extensible-custom resources that can be connected at different tiers
●Expressive-core functionality such as header-based matching,traffic weighing,etc.
●API gateway;for authorization,rate limitation and business/application layer connection considerations,employ Istio envoy and extensions.
●Service mesh;the gateway API creates standardized vendor-neutral implementations such as Istio.

As with the consolidation of a central control plane for administration,a consolidated API for gateways allows network and application-layer connection issues to be configured using a single API and a single control point on the cluster.

Summary

The particular problems posed by hybrid cloud environments need a reimagining of developer capabilities.The rising difficulty of handling connection problems is due to the development of application deployments and dependencies stretching across numerous cloud environments,clusters and on-premises systems.

Additional difficulty levels are added by the requirement to offer openness in multi-cluster environments with automated load balancing,failover across numerous cloud environments,maintaining application access rules across deployments and resolving dependencies across clusters.

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