Sablier

Sablier is an API that start containers on demand. It provides an integrations with multiple reverse proxies and different loading strategies.

Sablier is a merge from https://github.com/acouvreur/traefik-ondemand-plugin/ and https://github.com/acouvreur/traefik-ondemand-service/. This repository was renamed to Sablier.

Because Traefik doesn't support go module v2+ yet, this is re-released starting at v1.0.0 instead of my original plans as 2.0.0.

• Sablier
  • Getting started
  • Features
  • CLI Usage
  • Configuration
  • Reverse proxies integration plugins
    • Traefik Integration
  • Kubernetes
  • API

Getting started

Binary

docker run -d --name nginx nginx
docker stop nginx
./sablier start
curl 'http://localhost:10000/?name=nginx&timeout=1m'

Docker

docker run -d --name nginx nginx
docker stop nginx
docker run -v /var/run/docker.sock:/var/run/docker.sock -p 10000:10000 ghcr.io/acouvreur/sablier:latest --swarmode=false
curl 'http://localhost:10000/?name=nginx&timeout=1m'

Features

• Support for Docker containers
• Support for Docker Swarm mode, scale services
• Support for Kubernetes Deployments and Statefulsets
• Start your container/service on the first request
• Automatic scale to zero after configured timeout upon last request the service received
• Dynamic loading page (cloudflare or grafana cloud style)
• Customize dynamic and loading pages

CLI Usage

Usage:
  sablier [command]

Available Commands:
  completion  Generate the autocompletion script for the specified shell
  help        Help about any command
  start       Start the Sablier server
  version     Print the version Sablier

Flags:
  -h, --help   help for sablier

Use "sablier [command] --help" for more information about a command.

Start options

Start the Sablier server

Usage:
  sablier start [flags]

Flags:
  -h, --help                      help for start
      --provider.name string      Provider to use to manage containers [docker swarm kubernetes] (default "docker")
      --server.base-path string   The base path for the API (default "/")
      --server.port int           The server port to use (default 10000)
      --storage.file string       File path to save the state

Configuration

Sablier can be configured in that order:

1. command line arguments
2. environment variable
3. config.yaml file

server:
  port: 10000
  basePath: /
storage:
  file: 
provider:
  name: docker # available providers are docker, swarm and kubernetes

Reverse proxies integration plugins

Traefik Integration

see Traefik Integration

Kubernetes

see KUBERNETES.md

API

GET <service_url>:10000/?name=<service_name>&timeout=<timeout>

Query param	Type	Description
name	string	The docker container name, or the swarm service name
timeout	time.Duration	The duration after which the container/service will be scaled down to 0

Body	Status code	Description
started	202 Created	The container/service is available
starting	201 Accepted	The container/service has been scheduled for starting but is not yet available

Credits

Hourglass icons created by Vectors Market - Flaticon