docker-common-issues-and-solutions

name	docker-common-issues-and-solutions
description	Sub-skill of docker: Common Issues and Solutions (+1).
version	1.0.0
category	operations
type	reference
scripts_exempt	true

Common Issues and Solutions (+1)

Common Issues and Solutions

Container won't start:

# Check logs
docker logs container-name

# Check container status
docker inspect container-name

# Run interactively to debug
docker run -it --entrypoint sh image-name

Permission denied errors:

# Fix file ownership
docker run --rm -v $(pwd):/app alpine chown -R $(id -u):$(id -g) /app

# Or use user namespace remapping

Out of disk space:

# Clean up unused resources
docker system prune -a --volumes

# Check disk usage
docker system df

Slow builds:

# Enable BuildKit
export DOCKER_BUILDKIT=1

# Use cache mounts
RUN --mount=type=cache,target=/root/.cache/pip pip install -r requirements.txt

Network connectivity issues:

# Check network
docker network inspect bridge

# Test connectivity
docker exec container-name ping other-container

# Check DNS resolution
docker exec container-name nslookup service-name

Debug Commands

# Shell into running container
docker exec -it container-name sh

# Copy files from container
docker cp container-name:/app/logs ./logs

# View container processes
docker top container-name

# Monitor resource usage
docker stats

# View container changes
docker diff container-name

# Export container filesystem
docker export container-name > container.tar