apache/apisix

feat: As a user, I want kubernetes service discovery to support more configuration items

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#8,311 opened on Nov 11, 2022

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good first issue

Description

Description

Recently, we deployed apisix on different clouds and used the feature of kubernetes service discovery. The problem is that on different clouds, the proxy layer (LB) in front of apiserver has different idle timeouts. However, in apisix's kubernetes service discovery, The time of a watch is fixed, which will cause a problem: when there is no endpoints event in the cluster for a long time, the server will time out instead of the client, and then the service discovery will restart the list-watch after a fixed 40 seconds , so if you can add some configuration items, such as the duration of a watch, retry time or strategy, etc., thank you!

Contributor guide

Tech stack
None
Domain
backendcloud
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
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.
clear
Prerequisites
Kubernetes service discoveryAPISIX configuration patternsLua programmingList watch mechanism
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65
Research direction
Investigate the existing Kubernetes service discovery implementation in the APISIX codebase, likely in the `lib/plugins/discovery/` directory. Understand the current fixed watch timeout of 40 seconds and the retry logic. Propose new configuration items such as watch duration and retry timeout. Ensure backward compatibility.