ASG Scaling Manager

Manage AWS Auto Scaling Group capacities by tag filters with a simple, reliable CLI.

Quick Install

pip install asg-scaling-manager

Usage

# Get help
asg-sm --help

# Scale ASGs tagged with eks:cluster-name=my-cluster to 6 instances total
asg-sm --tag-value my-cluster --desired 6 --dry-run

# Apply changes with optional per-ASG max cap
asg-sm --tag-value my-cluster --desired 8 --max-size 5 --region eu-west-1

# Scale down to zero (sets min/max/desired to 0)
asg-sm --tag-value my-cluster --desired 0

Features

• Tag-based filtering: Target ASGs by eks:cluster-name (default) or custom tags
• Smart distribution: Evenly distributes desired capacity across matched ASGs
• Safety first: Dry-run mode to preview changes
• EKS optimized: Defaults to eks:cluster-name tag for easy EKS cluster management
• Flexible caps: Optional per-ASG max size limits

Examples

# Preview scaling for production cluster
asg-sm --tag-value prod-cluster --desired 12 --dry-run

# Scale with name filter and custom tag
asg-sm --tag-key team --tag-value payments --name-contains web --desired 4

# Emergency scale down
asg-sm --tag-value staging --desired 0

Notes

• Default tag: Uses eks:cluster-name by default (perfect for EKS clusters)
• Desired vs max-size: --desired is total across all ASGs, --max-size is per-ASG cap
• AWS auth: Uses --profile and/or --region for AWS credentials
• Dry-run: Always test with --dry-run first

Alternative Installation

# Isolated install (recommended for CLIs)
pipx install asg-scaling-manager

# Development install
git clone https://github.com/grzes-94/asg-scaling-manage
cd asg-scaling-manage
pip install -e .