kedacore/keda

Introduce new time-window trigger

Open

#3,566 opened on Aug 19, 2022

View on GitHubContributor guide
 (37 comments) (10 reactions) (1 assignee)Go (1,457 forks)auto 404
feature-requestgood first issueneeds-discussionstale-bot-ignore

Repository metrics

Stars
 (10,372 stars)
PR merge metrics
 (PR metrics pending)

Description

Proposal

Introduce new time-window trigger which allows you to scale based on a defined time window.

We could use inspiration from the kube-green project:

triggers:
- type: time-window
  weekdays: "Mo-Fri"
  start: "08:00"
  end: "20:00"
  timezone: Asia/Kolkata  # The acceptable values would be a value from the IANA Time Zone Database.

The cron scaler uses desiredReplicas but I believe it should just rely on min/max replica defined on the ScaledObject/ScaledJob.

This trigger should replace the cron scaler which is confusing in how it scales as end-users tend to think it behaves like jobs.

Use-Case

Scale workloads based on a time window.

Anything else?

No response

Contributor guide

Research direction
Study the existing cron scaler implementation, review the kube green project for time window logic, and analyze the community discussion for design preferences.
Tech stack
go
Domain
backend
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.
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
KubernetesGo
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
50