Cross-Cluster Service Gateway Routing Without Sidecar Overhead
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Solution Overview
Problem
Existing Kubernetes (K8s) systems lack an automatic solution for cross-cluster service access, leading to complex and error-prone manual configurations, high management costs, and inefficient resource usage due to the deployment of sidecar containers.
Innovation Solution
A method for cross-cluster service access that involves creating a cluster group, configuring a gateway with mapping relationships, and using application gateways to automatically forward service requests between clusters, reducing the need for manual network configurations and sidecar usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual configuration is used for cross-cluster service access, then service access between clusters can be achieved, but the configuration becomes highly complex and error-prone
Solution Approach 1:
The system performs self-service through automatic service discovery and configuration generation. The service registration module automatically discovers services in remote clusters and generates configuration information without manual intervention. The gateway automatically configures routing rules based on discovered service information, eliminating the need for manual configuration while ensuring reliable cross-cluster service access.
Solution Approach 2:
The system performs preliminary actions by pre-establishing gateway connections and service registries before actual service access is needed. The gateway maintains pre-configured routing capabilities and service discovery mechanisms are activated in advance, allowing services to be automatically located and accessed without complex manual setup when access is required.
2Adaptability or versatility
If sidecar containers are deployed for cross-cluster service access, then service forwarding between clusters is enabled, but resource usage and management costs increase
Solution Approach 1:
The invention extracts the cross-cluster service access functionality from individual pod sidecar containers and consolidates it into a centralized gateway component. The gateway handles all service discovery, routing, and forwarding operations externally, allowing pods to access remote services directly without requiring sidecar containers. This extraction eliminates the need for additional sidecar resources while maintaining full cross-cluster access capability.
3Adaptability or versatility
If sidecar containers are used for service governance, then cross-cluster service access is supported, but management costs increase
Solution Approach 1:
The invention merges service governance functionality into the centralized gateway, combining service discovery, routing, load balancing, and access control into a single management point. This consolidation allows uniform governance policies to be applied across all clusters through the gateway, simplifying management operations and reducing the complexity of managing distributed sidecar containers across multiple clusters.
Data Source
AI summary
In a method for cross-cluster service access, a tenant configures a created cluster group, and a gateway sends configuration information to each application gateway such that when receiving a service access request of a client in a first cluster, a first application gateway may directly forward, based on the configuration information, the service access request to an application gateway corresponding to another cluster. In this way, the tenant can access a service in the other cluster, to implement automatic access between services in a plurality of clusters, thereby facilitating management.