Coolify

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Frequently Asked Questions ​

Here you can find answers to the most common questions, errors and problems.

Permission denied (publickey) ​

Example: Server is not reachable. Reason: root@host.docker.internal: Permission denied (publickey).

Your Coolify instance cannot reach the server it is running on. During installation, a public key is generated to /data/coolify/ssh/keys/id.root@host.docker.internal.pub and automatically added to ~/.ssh/authorized_keys.

If it is not added, you can add it manually by running the following command on your server:

bash
cat /data/coolify/ssh/keys/id.root@host.docker.internal.pub >> ~/.ssh/authorized_keys
cat /data/coolify/ssh/keys/id.root@host.docker.internal.pub >> ~/.ssh/authorized_keys

Cloudflare Proxy activated but application is not reachable ​

You need to set your SSL/TLS configuration to at least Full in your Cloudflare dashboard.

Documentation: https://developers.cloudflare.com/ssl/origin-configuration/ssl-modes/full/