docker-security✓ تایید شده

محتوای SKILL.md

---
name: docker-security
description: Secure Docker containers and images with hardening, scanning, and secrets management
sasmp_version: "1.3.0"
bonded_agent: 06-docker-security
bond_type: PRIMARY_BOND
---

# Docker Security Skill

Master container security hardening, vulnerability scanning, and secrets management following CIS Docker Benchmark.

## Purpose

Implement security best practices for Docker containers and images including non-root users, capability dropping, and vulnerability scanning.

## Parameters

| Parameter | Type | Required | Default | Description |
|-----------|------|----------|---------|-------------|
| image | string | No | - | Image to scan |
| severity | enum | No | HIGH | CRITICAL/HIGH/MEDIUM/LOW |
| compliance | string | No | CIS | CIS/NIST/SOC2 |

## Security Hardening

### Non-Root User (MANDATORY)
```dockerfile
# Create non-root user
RUN addgroup -g 1001 app && \
    adduser -u 1001 -G app -D app

# Set ownership
COPY --chown=app:app . /app

# Switch user
USER app
```

### Read-Only Filesystem
```bash
docker run --read-only \
  --tmpfs /tmp:rw,noexec,nosuid \
  myapp:latest
```

### Drop Capabilities
```bash
docker run \
  --cap-drop ALL \
  --cap-add NET_BIND_SERVICE \
  myapp:latest
```

### Complete Hardened Run
```bash
docker run \
  --security-opt no-new-privileges:true \
  --cap-drop ALL \
  --read-only \
  --user 1001:1001 \
  --pids-limit 100 \
  --memory 512m \
  myapp:latest
```

## Vulnerability Scanning

### Trivy
```bash
# Basic scan
trivy image myapp:latest

# Filter by severity
trivy image --severity CRITICAL,HIGH myapp:latest

# CI/CD integration (fail on critical)
trivy image --exit-code 1 --severity CRITICAL myapp:latest

# JSON output
trivy image --format json --output report.json myapp:latest
```

### Docker Scout
```bash
# Quick scan
docker scout cves myapp:latest

# Detailed report
docker scout cves --format markdown myapp:latest
```

## Secrets Management

### Docker Compose Secrets
```yaml
services:
  database:
    image: postgres:16-alpine
    secrets:
      - db_password
    environment:
      POSTGRES_PASSWORD_FILE: /run/secrets/db_password

secrets:
  db_password:
    file: ./secrets/db_password.txt
```

### BuildKit Secrets
```dockerfile
# syntax=docker/dockerfile:1
RUN --mount=type=secret,id=npmrc,target=/root/.npmrc \
    npm install
```

```bash
docker build --secret id=npmrc,src=.npmrc .
```

## Secure Dockerfile
```dockerfile
FROM node:20-alpine AS builder
WORKDIR /app
COPY package*.json ./
RUN npm ci --only=production
COPY . .
RUN npm run build

FROM gcr.io/distroless/nodejs20-debian12
WORKDIR /app
COPY --from=builder /app/dist ./dist
COPY --from=builder /app/node_modules ./node_modules
USER nonroot
CMD ["dist/index.js"]
```

## Error Handling

### Common Errors
| Error | Cause | Solution |
|-------|-------|----------|
| `permission denied` | Non-root user | Fix file ownership |
| `read-only filesystem` | Read-only mode | Use tmpfs mounts |
| `operation not permitted` | Missing capability | Add specific cap |

### Fallback Strategy
1. Start without restrictions
2. Add security options incrementally
3. Test each restriction

## Troubleshooting

### Debug Checklist
- [ ] Running as non-root? `docker exec <c> id`
- [ ] Scanned for vulnerabilities?
- [ ] Capabilities dropped?
- [ ] Secrets not in env vars?

### CIS Benchmark
```bash
docker run --rm --net host --pid host \
  -v /var/run/docker.sock:/var/run/docker.sock \
  docker/docker-bench-security
```

## Usage

```
Skill("docker-security")
```

## Related Skills
- dockerfile-basics
- docker-production

مجوز

مجوز اعلام‌شده: MIT

MIT License

Copyright (c) 2026 majiayu000

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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