Skip to main content

🐳 Docker Engine CE on the SaveinCloud platform

This guide aims to instruct the creation, configuration, and best practices for using the Docker Engine CE stack on the SaveinCloud PaaS platform.

🛠️ Installation via Marketplace​

  1. Access the SaveinCloud panel and click on MARKETPLACE.
  2. Search for Docker Engine CE.

imagem

You will see a screen with the following options:

imagem8

🔢 Docker Version​

Select the desired Docker version. Example: 28.1.1-almalinux-9.

⚙️ Deployment Options​

  • Create a clean standalone engine
    Creates an isolated Docker instance. Ideal for running independent containers.

  • Connect to an existing swarm cluster
    Connects this instance to an existing Swarm cluster. (Advanced use)

  • Deploy containers from compose.yml
    Allows launching containers directly with a docker-compose.yml.

✅ Additional Checkboxes​

  • Install Portainer UI and Let’s Encrypt SSL certificates
    Installs Portainer (graphical control panel) and applies SSL certificates with Let’s Encrypt.
tip

💡 Use the Portainer UI to visually manage your containers, volumes, and networks. It facilitates managing more complex environments. To access it, use the address: https://nome-ambiente.sp1.br.saveincloud.net.br:4848/

📦 Practical Example with Docker Hub Image​

We will use an official Docker Hub image: nginxdemos/hello.

docker run -d   --name hello-docker   -p 8080:80   nginxdemos/hello

Access: http://<ip_publico>:8080 to see the application running.

info

ℹ️ The image nginxdemos/hello is lightweight, perfect for quick web container tests.

⚙️ Access and Management​

SSH​

After creation, access the instance via terminal:

imagem

Docker Commands​

docker ps        # Ver containers ativos
docker images    # Listar imagens
docker logs -f <nome>  # Ver logs em tempo real

🔐 Security and Best Practices​

warning

⚠️ Never expose the Docker socket (/var/run/docker.sock) publicly. It gives full control of the machine!

  • Use official images whenever possible.
  • Update your images frequently.
  • Configure firewall to block unnecessary ports.
  • Avoid running containers as root when possible.

💸 Resource Optimization​

tip

💡 Reserve cloudlets according to your average usage to save costs. Reserved cloudlets are cheaper than dynamic ones.

📁 Recommended Structure​

/home/docker/
├── projetos/
│   └── app1/
│       └── Dockerfile
├── scripts/
├── backups/

📚 Related Resources​

🧠 Questions?​

Contact the technical support team with your question or issue.