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SKILL.md

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+---
+name: docker-essentials
+description: "用于容器管理、镜像操作和调试的Docker基础命令和工作流。"
+homepage: https://docs.docker.com/
+metadata: {"clawdbot":{"emoji":"🐳","requires":{"bins":["docker"]}}}
+---
+
+# Docker Essentials
+
+Essential Docker commands for container and image management.
+
+## Container Lifecycle
+
+### Running containers
+```bash
+# Run container from image
+docker run nginx
+
+# Run in background (detached)
+docker run -d nginx
+
+# Run with name
+docker run --name my-nginx -d nginx
+
+# Run with port mapping
+docker run -p 8080:80 -d nginx
+
+# Run with environment variables
+docker run -e MY_VAR=value -d app
+
+# Run with volume mount
+docker run -v /host/path:/container/path -d app
+
+# Run with auto-remove on exit
+docker run --rm alpine echo "Hello"
+
+# Interactive terminal
+docker run -it ubuntu bash
+```
+
+### Managing containers
+```bash
+# List running containers
+docker ps
+
+# List all containers (including stopped)
+docker ps -a
+
+# Stop container
+docker stop container_name
+
+# Start stopped container
+docker start container_name
+
+# Restart container
+docker restart container_name
+
+# Remove container
+docker rm container_name
+
+# Force remove running container
+docker rm -f container_name
+
+# Remove all stopped containers
+docker container prune
+```
+
+## Container Inspection & Debugging
+
+### Viewing logs
+```bash
+# Show logs
+docker logs container_name
+
+# Follow logs (like tail -f)
+docker logs -f container_name
+
+# Last 100 lines
+docker logs --tail 100 container_name
+
+# Logs with timestamps
+docker logs -t container_name
+```
+
+### Executing commands
+```bash
+# Execute command in running container
+docker exec container_name ls -la
+
+# Interactive shell
+docker exec -it container_name bash
+
+# Execute as specific user
+docker exec -u root -it container_name bash
+
+# Execute with environment variable
+docker exec -e VAR=value container_name env
+```
+
+### Inspection
+```bash
+# Inspect container details
+docker inspect container_name
+
+# Get specific field (JSON path)
+docker inspect -f '{{.NetworkSettings.IPAddress}}' container_name
+
+# View container stats
+docker stats
+
+# View specific container stats
+docker stats container_name
+
+# View processes in container
+docker top container_name
+```
+
+## Image Management
+
+### Building images
+```bash
+# Build from Dockerfile
+docker build -t myapp:1.0 .
+
+# Build with custom Dockerfile
+docker build -f Dockerfile.dev -t myapp:dev .
+
+# Build with build args
+docker build --build-arg VERSION=1.0 -t myapp .
+
+# Build without cache
+docker build --no-cache -t myapp .
+```
+
+### Managing images
+```bash
+# List images
+docker images
+
+# Pull image from registry
+docker pull nginx:latest
+
+# Tag image
+docker tag myapp:1.0 myapp:latest
+
+# Push to registry
+docker push myrepo/myapp:1.0
+
+# Remove image
+docker rmi image_name
+
+# Remove unused images
+docker image prune
+
+# Remove all unused images
+docker image prune -a
+```
+
+## Docker Compose
+
+### Basic operations
+```bash
+# Start services
+docker-compose up
+
+# Start in background
+docker-compose up -d
+
+# Stop services
+docker-compose down
+
+# Stop and remove volumes
+docker-compose down -v
+
+# View logs
+docker-compose logs
+
+# Follow logs for specific service
+docker-compose logs -f web
+
+# Scale service
+docker-compose up -d --scale web=3
+```
+
+### Service management
+```bash
+# List services
+docker-compose ps
+
+# Execute command in service
+docker-compose exec web bash
+
+# Restart service
+docker-compose restart web
+
+# Rebuild service
+docker-compose build web
+
+# Rebuild and restart
+docker-compose up -d --build
+```
+
+## Networking
+
+```bash
+# List networks
+docker network ls
+
+# Create network
+docker network create mynetwork
+
+# Connect container to network
+docker network connect mynetwork container_name
+
+# Disconnect from network
+docker network disconnect mynetwork container_name
+
+# Inspect network
+docker network inspect mynetwork
+
+# Remove network
+docker network rm mynetwork
+```
+
+## Volumes
+
+```bash
+# List volumes
+docker volume ls
+
+# Create volume
+docker volume create myvolume
+
+# Inspect volume
+docker volume inspect myvolume
+
+# Remove volume
+docker volume rm myvolume
+
+# Remove unused volumes
+docker volume prune
+
+# Run with volume
+docker run -v myvolume:/data -d app
+```
+
+## System Management
+
+```bash
+# View disk usage
+docker system df
+
+# Clean up everything unused
+docker system prune
+
+# Clean up including unused images
+docker system prune -a
+
+# Clean up including volumes
+docker system prune --volumes
+
+# Show Docker info
+docker info
+
+# Show Docker version
+docker version
+```
+
+## Common Workflows
+
+**Development container:**
+```bash
+docker run -it --rm \
+  -v $(pwd):/app \
+  -w /app \
+  -p 3000:3000 \
+  node:18 \
+  npm run dev
+```
+
+**Database container:**
+```bash
+docker run -d \
+  --name postgres \
+  -e POSTGRES_PASSWORD=secret \
+  -e POSTGRES_DB=mydb \
+  -v postgres-data:/var/lib/postgresql/data \
+  -p 5432:5432 \
+  postgres:15
+```
+
+**Quick debugging:**
+```bash
+# Shell into running container
+docker exec -it container_name sh
+
+# Copy file from container
+docker cp container_name:/path/to/file ./local/path
+
+# Copy file to container
+docker cp ./local/file container_name:/path/in/container
+```
+
+**Multi-stage build:**
+```dockerfile
+# Dockerfile
+FROM node:18 AS builder
+WORKDIR /app
+COPY package*.json ./
+RUN npm install
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+COPY --from=builder /app/dist /usr/share/nginx/html
+```
+
+## Useful Flags
+
+**`docker run` flags:**
+- `-d`: Detached mode (background)
+- `-it`: Interactive terminal
+- `-p`: Port mapping (host:container)
+- `-v`: Volume mount
+- `-e`: Environment variable
+- `--name`: Container name
+- `--rm`: Auto-remove on exit
+- `--network`: Connect to network
+
+**`docker exec` flags:**
+- `-it`: Interactive terminal
+- `-u`: User
+- `-w`: Working directory
+
+## Tips
+
+- Use `.dockerignore` to exclude files from build context
+- Combine `RUN` commands in Dockerfile to reduce layers
+- Use multi-stage builds to reduce image size
+- Always tag your images with versions
+- Use `--rm` for one-off containers
+- Use `docker-compose` for multi-container apps
+- Clean up regularly with `docker system prune`
+
+## Documentation
+
+Official docs: https://docs.docker.com/
+Dockerfile reference: https://docs.docker.com/engine/reference/builder/
+Compose file reference: https://docs.docker.com/compose/compose-file/

_meta.json

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+{
+  "ownerId": "kn7anq2d7gcch060anc2j9cg89800dyv",
+  "slug": "docker-essentials",
+  "version": "1.0.0",
+  "publishedAt": 1769692040015
+}