Coolify vs Dokku: Which PaaS Wins on Bare‑Metal?

Running your own platform‑as‑a‑service (PaaS) gives you the flexibility of a public cloud while keeping full control over data, cost, and customisation. Two open‑source projects that make this possible are Coolify and Dokku. Both turn a bare‑metal server or VPS into a self‑hosted PaaS, but they differ in architecture, feature set, and interaction model. This article compares the two, walks through a basic installation on common Linux distributions, and highlights the scenarios where each tool shines.

What Is Coolify?

Coolify is a modern, Docker‑centric PaaS that provides a graphical web UI, built‑in CI/CD pipelines, and support for multiple deployment targets (Docker, Docker‑Compose, and Kubernetes). It is aimed at developers who prefer a visual interface and want to manage databases, SSL certificates, and environment variables without leaving the browser.

• Docker‑first: All applications run inside Docker containers managed by Coolify.
• Web dashboard: A single‑page app lets you create projects, view logs, and configure services.
• Built‑in CI/CD: Push to a Git repository and Coolify builds and deploys automatically.
• Extensible: Supports custom Dockerfiles, Docker‑Compose files, and can proxy to external services.

What Is Dokku?

Dokku is a lightweight PaaS that emulates the Heroku workflow using Git‑push deployments. It is essentially a collection of Bash scripts and plugins that run on a plain Linux server. Dokku relies on Docker under the hood but does not provide a graphical UI out of the box; you manage apps through the command line or third‑party web front‑ends.

• Heroku‑compatible: Uses the same git push heroku master pattern.
• Plugin ecosystem: Add‑ons for databases, SSL, monitoring, and more.
• Minimal footprint: Only a few megabytes of scripts plus Docker.
• CLI‑centric: Ideal for developers comfortable with the terminal.

Feature Comparison

Feature	Coolify	Dokku
Installation method	Docker‑Compose (single command)	Shell script + Docker
Web UI	Full‑featured dashboard	None (optional plugins)
CI/CD integration	Built‑in pipelines	External (e.g., GitHub Actions)
Heroku buildpacks	Supported via Dockerfile or buildpacks	Native support
Database add‑ons	Managed via UI, Docker containers	Plugins (e.g., dokku‑postgres)
SSL handling	Automatic via Let’s Encrypt UI	Plugin‑based (e.g., dokku‑letsencrypt)
Resource usage	Slightly higher (UI + extra services)	Very low (core only)

Installing Coolify on a Fresh Server

Coolify is distributed as a Docker‑Compose stack, so the only prerequisites are Docker Engine and Docker‑Compose. Below are the commands for the two most common Linux families.

Debian / Ubuntu (apt)

# Update package index
sudo apt update

# Install prerequisite packages
sudo apt install -y ca-certificates curl gnupg lsb-release

# Add Docker’s official GPG key
curl -fsSL https://download.docker.com/linux/$(. /etc/os-release; echo "$ID")/gpg \
  | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg

# Add Docker repository
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] \
https://download.docker.com/linux/$(. /etc/os-release; echo "$ID") $(lsb_release -cs) stable" \
  | sudo tee /etc/apt/sources.list.d/docker.list > /dev/null

# Install Docker Engine
sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io

# Enable and start Docker
sudo systemctl enable --now docker

# Install Docker‑Compose (v2 plugin)
sudo apt install -y docker-compose-plugin

# Create a directory for Coolify
mkdir -p ~/coolify && cd ~/coolify

# Download the official Docker‑Compose file
curl -L https://github.com/coollabsio/coolify/releases/latest/download/docker-compose.yml \
  -o docker-compose.yml

# Start the stack
sudo docker compose up -d

Explanation

• The first block adds Docker’s official repository and installs the engine.
• Docker‑Compose is installed as a plugin (v2), which integrates with the docker command.
• The docker-compose.yml defines services such as coolify, postgres, and redis.
• docker compose up -d pulls the images and starts the containers in detached mode.

AlmaLinux / Rocky Linux / RHEL (dnf)

# Enable the Docker CE repository
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

# Install Docker Engine
sudo dnf install -y docker-ce docker-ce-cli containerd.io

# Enable and start Docker
sudo systemctl enable --now docker

# Install Docker‑Compose (v2 plugin) from the Docker package
sudo dnf install -y docker-compose-plugin

# Create a working directory
mkdir -p ~/coolify && cd ~/coolify

# Fetch the compose file
curl -L https://github.com/coollabsio/coolify/releases/latest/download/docker-compose.yml \
  -o docker-compose.yml

# Launch Coolify
sudo docker compose up -d

The steps mirror the Debian/Ubuntu instructions but use dnf and the CentOS‑compatible repository.

Installing Dokku on a Fresh Server

Dokku’s installer is a single Bash script that configures Docker, creates a dokku user, and sets up Nginx as a reverse proxy.

Debian / Ubuntu (apt)

# Update package list
sudo apt update

# Install prerequisite packages
sudo apt install -y apt-transport-https ca-certificates curl software-properties-common

# Add Docker’s GPG key and repository (same as for Coolify)
curl -fsSL https://download.docker.com/linux/ubuntu/gpg \
  | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/docker-archive-keyring.gpg] \
https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable" \
  | sudo tee /etc/apt/sources.list.d/docker.list
sudo apt update
sudo apt install -y docker-ce docker-ce-cli containerd.io

# Run the Dokku installer (replace the version tag with the latest if needed)
wget https://dokku.com/install/v0.30.0/bootstrap.sh
sudo DOKKU_TAG=v0.30.0 bash bootstrap.sh

The installer:

• Installs Docker if it is not already present.
• Creates the dokku system user.
• Sets up Nginx with a wildcard SSL certificate (self‑signed initially).
• Enables the dokku command for managing apps.

AlmaLinux / Rocky Linux / RHEL (dnf)

# Install prerequisite tools
sudo dnf install -y yum-utils device-mapper-persistent-data lvm2

# Add Docker CE repository
sudo dnf config-manager --add-repo=https://download.docker.com/linux/centos/docker-ce.repo

# Install Docker Engine
sudo dnf install -y docker-ce docker-ce-cli containerd.io

# Enable and start Docker
sudo systemctl enable --now docker

# Download and run Dokku bootstrap script
curl -fsSL https://dokku.com/install/v0.30.0/bootstrap.sh -o bootstrap.sh
sudo DOKKU_TAG=v0.30.0 bash bootstrap.sh

The script performs the same setup steps as the Debian/Ubuntu version, using dnf to fetch Docker.

Day‑to‑Day Workflow: Deploying an App

Coolify

1. Log in to the web dashboard (default http://your‑server:3000).
2. Click “Create Project”, give it a name, and connect a Git repository (GitHub, GitLab, or a plain URL).
3. Choose a build method: Dockerfile, Docker‑Compose, or Buildpack.
4. Define environment variables, set a domain, and enable “Auto‑Deploy”.
5. Save – Coolify pulls the code, builds the image, and starts the container. Logs are viewable in the browser.

Dokku

# Create a new app
dokku apps:create myapp

# Add a remote to your local repository (run from your development machine)
git remote add dokku ssh://root@your-server:22/dokku/myapp

# Push code – Dokku detects the language, builds with a buildpack, and starts the container
git push dokku main:master

After the push, Dokku automatically creates an Nginx vhost. To add a custom domain:

dokku domains:add myapp example.com

SSL can be provisioned with the Let’s Encrypt plugin:

dokku plugin:install https://github.com/dokku/dokku-letsencrypt.git
dokku letsencrypt:enable myapp

When to Choose Coolify vs. Dokku

• Prefer Coolify if
  • You want a visual interface for managing multiple apps, databases, and SSL certificates.
  • Your team includes non‑technical members who will monitor deployments.
  • You are comfortable running a small additional stack (Redis, Postgres) that Coolify bundles.
• Prefer Dokku if
  • You value minimal resource consumption and a lightweight footprint.
  • You already follow the Heroku Git‑push workflow and need a drop‑in replacement.
  • You like to extend functionality through a mature plugin ecosystem.

Running on AtoZNode Cloud VPS or Dedicated Servers

Both tools run comfortably on typical AtoZNode VPS specifications (2 vCPU, 4 GB RAM, 80 GB SSD). Because they rely on Docker, each app is isolated in its own container, aligning with the security expectations of Indian enterprises handling personal data. Remember to:

1. Keep the host OS updated (apt update && apt upgrade -y or dnf update -y).
2. Configure a firewall (e.g., ufw allow 22,80,443 on Debian/Ubuntu or firewall-cmd --add-service=http on AlmaLinux).
3. Back up Docker volumes that store databases or persistent files.

Conclusion

Coolify and Dokku both enable you to transform a bare‑metal server or VPS into a personal PaaS, but they cater to different workflows. Coolify shines with its all‑in‑one dashboard and built‑in CI/CD, making it a good fit for teams that prefer a GUI. Dokku stays true to the minimalist, Heroku‑compatible philosophy, appealing to developers who enjoy command‑line control and a tiny footprint. Whichever you choose, the installation steps are straightforward on both Debian/Ubuntu and AlmaLinux/Rocky/RHEL systems, and both integrate cleanly with the typical AtoZNode hosting environment.