Error Message and Logs

The Coolify install.sh script aggressively manages /etc/docker/daemon.json to enforce logging standards and address pools. However, it does not robustly merge these settings with existing configurations.

If a user has pre-configured Docker to use a custom data directory (e.g., for persistent storage on a separate volume):

 1 {
 2   "data-root": "/mnt/data/docker"
 3 }

The installer overwrites this file with its own template (logging + address pools), causing Docker to lose the data-root setting.

Impact:

1. Docker restarts and reverts to /var/lib/docker (Root disk).
2. Any existing data on the custom volume is ignored.
3. New data (volumes, images) fills up the root disk instead of the intended persistent volume.
4. Infrastructure-as-Code setups (Terraform/Cloud-init) that configure storage before installing Coolify are broken.

To Reproduce

1. Configure /etc/docker/daemon.json with {"data-root": "/mnt/data"}.
2. Run the Coolify install script: curl -fsSL https://cdn.coollabs.io/coolify/install.sh | bash.
3. Check cat /etc/docker/daemon.json.
   • Result: data-root key is missing.
   • Expected: data-root should be preserved, merged with Coolify's logging config.

Proposed Solution
The installer should use jq (which it installs anyway) to securely merge the required logging/network config into the existing JSON file, rather than overwriting it with a static template.

Workaround
Currently, we have to implement a post-install hook to detect the overwrite, migrate any data created in /var/lib/docker during the installation window, and restore the correct daemon.json.

Steps to Reproduce

1. Configure /etc/docker/daemon.json with {"data-root": "/mnt/data"}.
2. Run the Coolify install script: curl -fsSL https://cdn.coollabs.io/coolify/install.sh | bash.
3. Check cat /etc/docker/daemon.json.
   • Result: data-root key is missing.
   • Expected: data-root should be preserved, merged with Coolify's logging config.

Example Repository URL

No response

Coolify Version

4.0.0-beta.454

Are you using Coolify Cloud?

No (self-hosted)

Operating System and Version (self-hosted)

Ubuntu 24.04 LTS

Additional Information

No response