envoyproxy/envoy

Atomic updates of xDS resources with their dependencies

Open

#12,095 opened on Jul 15, 2020

View on GitHub
 (4 comments) (0 reactions) (0 assignees)C++ (5,373 forks)batch import
area/xdsdesign proposalhelp wanted

Repository metrics

Stars
 (27,997 stars)
PR merge metrics
 (Avg merge 8d) (378 merged PRs in 30d)

Description

When the pilot crashes, in some scenarios, the configuration data will be inconsistent, resulting in a request of 503 NR~ （https://github.com/istio/istio/issues/25495）

Ads is the final consistency, but in the process of ads pushing, if pilot crash, it will cause abnormal traffic, such as after pushing cds and then the process crash~

It is recommended whether ads (rds, eds, lds, rds) can be accompanied by a version number, and cds can be associated with lds and rds, so that the configuration will take effect only after all configurations are correctly received, and the configuration will be in the warm state before the configuration takes effect.

@htuch @lizan

Contributor guide

Research direction
Investigate the xDS protocol to understand how atomic updates with dependencies can be implemented. Look into existing proposals or discussions about versioning and consistency in Envoy's xDS. Consider the association between CDS, LDS, RDS, and EDS resources. The goal is to ensure that all related configurations are received correctly before taking effect, possibly using a warm state.
Tech stack
None
Domain
backenddistributed systems
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
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
C++EnvoyxDS
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
15