Docker VPS Hosting - Container Deployment on Offshore VPS

Docker requires access to Linux kernel namespaces and cgroups - features that shared hosting environments do not expose. Running the Docker daemon requires root or a user in the docker group with socket access. Docker Compose then lets you define multi-container stacks (app + database + cache + reverse proxy) in a single YAML file and bring them up with one command. Container networking (bridge, host, overlay) requires the ability to create virtual network interfaces - another operation that is impossible on shared hosting. A VPS with root access is the minimum requirement for any real Docker workload.

Install Docker Engine on Debian/Ubuntu: ```bash curl -fsSL https://get.docker.com | sh usermod -aG docker $USER systemctl enable docker ``` A typical Docker Compose stack for a web application: ```yaml services: app: image: myapp:latest restart: unless-stopped environment: DATABASE_URL: postgres://app:secret@db:5432/myapp depends_on: - db - redis db: image: postgres:16-alpine volumes: - pgdata:/var/lib/postgresql/data redis: image: redis:7-alpine nginx: image: nginx:alpine ports: - "80:80" - "443:443" volumes: - ./nginx.conf:/etc/nginx/nginx.conf:ro volumes: pgdata: ``` Run `docker compose up -d` to start the entire stack. Use `docker compose logs -f` to stream logs from all services simultaneously.

Docker containers are ephemeral by default - data written inside a container is lost when it stops. Use named volumes or bind mounts for persistent data. Named volumes are managed by Docker and survive container restarts and image updates: ```bash docker volume create pgdata docker run -v pgdata:/var/lib/postgresql/data postgres:16 ``` For backup, stop the container or use `pg_dump` inside the running container: ```bash docker exec myapp-db pg_dump -U app myapp > backup.sql ``` AnubizHost VPS plans use NVMe SSD storage, so volume I/O performance is consistent - no shared disk contention that plagues HDD-based hosting environments.

Docker creates a bridge network by default, isolating container-to-container traffic from the host. Expose only the ports you need with the ports directive in Compose. Unlike some mainstream hosts that block port ranges or require firewall ticket requests, AnubizHost VPS gives you full iptables access - Docker manages its own iptables chains for NAT and filtering, and you can add custom rules without them being overwritten by a host-level firewall policy. This makes running non-standard services (custom game servers, private proxies, Tor relays) straightforward on our infrastructure.