How does Docker Compose work?
Docker Compose lets you define and manage a multi-container application with a single YAML file. Modern docker compose (v2, bundled as a plugin in the Docker CLI) uses the Compose Specification and no longer requires a top-level version: field — that key is deprecated and ignored if present. The old, standalone docker-compose (with a hyphen, the Python-based v1 binary) is now an unmaintained legacy tool.
Bind mounts and named volumes are different things: a definition like ./data:/app/data is a bind mount that maps a relative directory on the host machine into the container — the files are directly visible and editable on the host. A definition like dbdata:/var/lib/postgresql/data is a named volume managed by Docker itself, not tied to a specific host filesystem path; a named volume must also be declared in the top-level volumes: block.
After saving this file as docker-compose.yml, run docker compose up -d in the same directory to start the service in detached mode. Use docker compose ps to check status, docker compose logs -f to follow logs, and docker compose down to stop it.
When should you use Docker Compose Generator?
The KEYDAL Docker Compose Generator tool is a browser-based utility that developers, system administrators, SEO specialists and enterprise technology teams use in their daily operations. It requires no installation, is free, and produces results instantly. It is designed so local teams can run audits without connecting to server environments and run analyses without touching production.
Typical scenarios include: post-migration verification, comparing domain or hosting providers, diagnosing customer issues, security auditing (pre-pentest reconnaissance), root-cause analysis of email deliverability problems, validating CDN or proxy configuration, surfacing technical audit data for SEO teams, and rapid information gathering during incident response. You can copy results as text and share them or paste them into internal documentation.
The KEYDAL infrastructure team provides web hosting, VPS, dedicated server management, server hardening, DNS configuration and SSL/TLS deployment services from Türkiye. Beyond these tools, we deliver server setup and operations support across Hetzner, OVHcloud, Contabo, DigitalOcean and Turkish providers.
Your queries are never stored on our servers
KEYDAL tools run stateless: domain names, IPs, URLs or other inputs are not persisted to any database. Logs are kept only for security purposes (rate limiting, abuse detection) and deleted within 30 days. For tools that handle sensitive data (tokens, API keys, JWTs), processing happens entirely in your browser — nothing is sent over the network. See our Privacy Policy for details.
All tools run over HTTPS with TLS 1.3 support. KEYDAL is a Türkiye-based technology company and complies fully with local data-protection regulations (KVKK) and GDPR principles.
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The KEYDAL free tools collection includes DNS lookup, WHOIS lookup, SSL certificate checker, HTTP headers analyzer, IP geolocation, uptime checker, JSON formatter, JWT decoder, Base64 encode/decode, QR code generator, meta tag analyzer and robots.txt tester. All browser-based, free, no installation.
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