rails + dokku bundle fails when trying to deploy for the first time

Question

I'm trying to deploy my rails app with Dokku. I added git remote to my repository and it starts deploying when I push remote, but it stops with this message:

Killed. Failed to install gems via Bundler.

! [remote rejected] master -> master (pre-receive hook declined)

• the gem at which it stops changes.
• It's my first time deploying to dokku.

Luhe

Answer 1

turns out that upgrading my droplet to a bigger one did the trick, and deployment worked. so seems like it needed something bigger than the smallest droplet.

Luhe

You'll probably run into the same problem later on though. Look at my answer. Creating a swapfile will prevent this in a more durable way. – Contrarily

Creating a swapfile isn't "more durable", it's a slower alternative to actually having more memory. – Bremsstrahlung

Answer 2

I just had a similar/same issue and solved it by enabling a swapfile.

While creating a bigger droplet works you aren't solving the real issue: The system runs out of memory while installing the gems.

On a 'normal' system this wouldn't be a problem since we'd have a swapfile. DigitalOcean does not have a default swapfile. Some reason this is to make people thing they need bigger droplets. While this solves the issue of installing your gems, you are doing it at a much higher yearly cost.

Instead, just create a swapfile. Ironically DigitalOcean has a great guide for this: http://dokku.viewdocs.io/dokku/getting-started/troubleshooting/

Contrarily

Direct link to instructions dokku.com/docs/getting-started/troubleshooting/… – Illuminism