Can I reuse containers to speed up local testing?

Yes, this skill includes configurations for the --reuse flag, which prevents act from destroying the container after a run, significantly speeding up subsequent iterations.

What is the best Docker image to use for most act workflows?

For most standard GitHub Actions, the catthehacker/ubuntu:act-latest image (Medium size) provides the best balance between tool availability and download speed.

How do I fix workspace permission errors in act?

The skill suggests using specific container-options to map your host user ID and group ID into the container, preventing 'Permission Denied' errors in the /github/workspace directory.

How do I handle Docker architecture issues on Apple Silicon?

The skill provides guidance on using the --container-architecture flag (typically linux/amd64 or linux/arm64) to ensure your local environment matches the expected runner architecture.

Act Docker Environment Setup

Name: Act Docker Environment Setup
Author: TheBushidoCollective

byTheBushidoCollective

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デプロイメントとDevOps

Optimizes Docker configurations and runner images for executing GitHub Actions locally with act.

概要

This skill provides specialized guidance for configuring Docker environments specifically for local GitHub Actions testing using act. It assists developers in selecting the appropriate runner image sizes—ranging from micro Node.js environments to full Ubuntu mirrors—while managing container lifecycle, resource limits, and complex volume mounts. By streamlining .actrc configuration and troubleshooting common Docker-related runner issues, it ensures local CI/CD simulations are fast, secure, and representative of production environments.

主な機能

Persistent .actrc configuration for consistent local workflow testing
Comprehensive runner image selection for Micro, Medium, and Large environments
Optimized volume mounting and persistent cache strategies
Security-focused Docker configuration using Linux capabilities and non-root users
Advanced container resource management including CPU, memory, and architecture limits
72 GitHub stars

ユースケース

Reducing CI/CD iteration time by implementing local container reuse and layer caching
Configuring Apple Silicon machines to run linux/amd64 GitHub Action runners
Debugging complex Docker-in-Docker or network-dependent workflows before pushing to GitHub

概要

主な機能

Persistent .actrc configuration for consistent local workflow testing
Comprehensive runner image selection for Micro, Medium, and Large environments
Optimized volume mounting and persistent cache strategies
Security-focused Docker configuration using Linux capabilities and non-root users
Advanced container resource management including CPU, memory, and architecture limits
72 GitHub stars

ユースケース

Reducing CI/CD iteration time by implementing local container reuse and layer caching
Configuring Apple Silicon machines to run linux/amd64 GitHub Action runners
Debugging complex Docker-in-Docker or network-dependent workflows before pushing to GitHub