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.

score 8 · Answer 1 · answered Jan 10 '17 at 07:35

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/

Direct link to instructions https://dokku.com/docs/getting-started/troubleshooting/#build-fails-with-killed-message — MECU, Apr 01 '22 at 16:56

score 3 · Accepted Answer · answered Apr 12 '16 at 19:11

3

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.

answered Apr 12 '16 at 19:11

figdig

307
2
13

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. – Mosselman Sep 19 '19 at 11:34
1

Creating a swapfile isn't "more durable", it's a slower alternative to actually having more memory. – Jose Diaz-Gonzalez Sep 20 '19 at 16:27

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

2 Answers2