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sablier

Containers & Orchestration

A free, open‑source tool that automatically starts workloads on demand and stops them after inactivity to save resources

Go Latest v1.16.1 · 2d ago Security brief →

Features

  • On‑demand start/stop for Docker, Kubernetes, Podman, Proxmox LXC workloads
  • Customizable waiting UI with themes while workloads warm up
  • Webhook notifications on instance start or stop
  • Prometheus metrics and OpenTelemetry tracing for observability

Recent releases

View all 8 releases →
No immediate action
v1.16.1 Bug fix

Respect running-only filter

No immediate action
v1.16.0 Mixed

ready-on-first-replica + API fixes + session copy

No immediate action
v1.15.0 Mixed

Anti-affinity + Build tag + Running-days

No immediate action
v1.14.0 New feature

Redis‑operator pause

v1.13.0 Breaking risk
⚠ Upgrade required
  • Add sablier.idle.replicas=1 to existing workloads that previously relied on CPU/memory throttling via idle.cpu or idle.memory settings.
Breaking changes
  • sablier.idle.cpu and sablier.idle.memory no longer enable throttling without setting sablier.idle.replicas=1
Notable features
  • --auto-stop-externally-started flag added
  • OpenTelemetry distributed tracing support added
  • SSE instance events endpoint (api) added
Full changelog

1.13.0 (2026-05-29)

⚠ BREAKING CHANGES

  • sablier.idle.cpu / sablier.idle.memory no longer enable throttling on their own. Add sablier.idle.replicas=1 to existing workloads that relied on CPU/memory throttling.

Features

  • add --auto-stop-externally-started flag (#906) (d2fd51d)
  • add --provider.reject-unlabeled-requests and --provider.verify-enabled-on-expiration (#901) (f1a4e61)
  • add OpenTelemetry distributed tracing support (#929) (68faefd)
  • add replica count to scale mode, gate resource throttling on idle.replicas >= 1 (#909) (5722c6f)
  • add running-hours keep-warm windows and timezone support (#907) (ed9c611)
  • add theme options schema (#917) (20828ca)
  • add webhooks (#920) (a608a8c)
  • api: add SSE instance events endpoint (#916) (2eccf89)
  • metrics: add sablier_instance_active_seconds_total metric (#932) (e92f438)
  • provider: add ready-after instance configuration (#904) (ff60d31)
  • provider: support CloudNativePG Cluster hibernation in Kubernetes (#944) (199f12e), closes #943
  • scale mode to throttle CPU/memory instead of stopping containers (#908) (d39804f)
  • support multiple groups per instance (#913) (5b0f896)
  • theme: bundle external CSS, JS, and images into custom themes (#928) (e9ba051)

Bug Fixes

Documentation

  • add benchmarking/performance (#931) (33abb7e)
  • add docker socket proxy example (#902) (af8127b)
  • add table of content divider (44134a3)
  • examples: example verify enabled on expiration (#911) (3e64b9e)
  • release please update version typo (b92169a)
  • update configuration docs and README (#930) (57a65d9)

Code Refactoring

Chores

  • add OpenTelemetry patterns to dependabot config (68866ea)

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Install & Platforms

Install via
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Community & Support

Beta — feedback welcome: [email protected]