Question

Docker Deployment Failing for Kamal due to Database Connection

When I attempt to connect to the database while spinning up docker service - it fails while connecting. I am using the connection string approach within my rails env. My logs and server info is below. I also tried setting up the docker compose env to test the db connection and it fails there as well.

rails env:

app-1  | [randomhash] ActiveRecord::ConnectionNotEstablished (connection to server at "ip", port 25060 failed: Connection refused
app-1 | Is the server running on that host and accepting TCP/IP connections?

db:

[13-1] pid=-----,user=[unknown],db=[unknown],app=[unknown],client=[local] LOG: connection received: host=[local]

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Bobby Iliev
Site Moderator
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October 23, 2023
Accepted Answer

Hi there,

Are you deploying your Dockerized app on a Droplet or on the DigitalOcean App Platform?

If this is on a Droplet, you would need to make sure that you’ve done the following:

  • Allow the Droplet’s IP address in the database cluster trusted sources as described here:

https://docs.digitalocean.com/products/databases/mysql/how-to/secure/

  • If you have a firewall on the Droplet itself, make sure that port 25060 is open for outgoing TCP connections

Let me know how it goes!

Best,

Bobby

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