higress-group/higress

Proposal: Simplify All-in-one Implementation with kine(sqlite) + k8s-apiserver

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#2,004 opened on Apr 2, 2025

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Description

Background: Based on the design principles of the All-in-one architecture (abstracting Kubernetes concepts while maintaining Kubernetes API compatibility), we propose re-evaluating the implementation approach described in the current design documentation.

Key Observations:

​User Perspective: All-in-one users expect a Kubernetes-transparent experience without interacting with low-level k8s components.

​Design Principle: The system should maximally reuse Kubernetes native concepts and APIs to ensure compatibility.

​Implementation Suggestion: Using kine (with SQLite) + kube-apiserver might provide a cleaner implementation compared to the current documented approach, as:

Kine already implements the Kubernetes storage interface (etcd v3 API)
SQLite embedded database aligns with All-in-one's single-node deployment scenario
Reduced maintenance cost through reuse of upstream Kubernetes components

Contributor guide

Research direction
Investigate the current All in one implementation and evaluate the feasibility of using kine with SQLite and kube apiserver as an alternative.
Tech stack
gokubernetes
Domain
backendinfrastructure
Issue type
Refactor
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
None
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30