envoyproxy/envoy

outlier detection: canary specific stats

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#872 opened on May 1, 2017

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enhancementhelp wanted

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Description

If we eject some/all canaries, alarms may not fire to indicate that there was a problem and then a deploy may continue to production. We should have canary specific outlier ejection stats to help create alarms around this scenario.

Contributor guide

Research direction
Explore the outlier detection implementation in Envoy, specifically the CanaryEjectionPredicate component. Understand how stats are recorded for outlier events, and then add similar stats scoped to canary hosts.
Tech stack
cpp
Domain
backendnetworking
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.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Mostly clear
Prerequisites
C++Bazel
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
55