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Initial setup

If you are using the free tier, then use a t2.micro instance. If not, you can use a t1.micro with spot to get the lowest price.

Create environment:

git tag -a -m "First deploy" eb-v1
eb init rssbox --platform "Ruby 2.6 (Puma)" --keyname id_rsa
eb create --single --instance_type t2.micro

For spot:

eb create --single --instance_type t1.micro --envvars EC2_SPOT_PRICE=0.01

With a load balancer:

eb create --instance_type t2.micro --elb-type application --envvars ASG_HEALTH_CHECK_TYPE=ELB

When selecting Ruby as the platform, the following variables are automatically set:

  • BUNDLE_WITHOUT=test:development
  • RACK_ENV=production (this is why the app still has to default APP_ENV to RACK_ENV)
  • RAILS_SKIP_ASSET_COMPILATION=false
  • RAILS_SKIP_MIGRATIONS=false

Deploy

Deploy with:

eb deploy --staged

To export a deployable zip, use:

git archive --format zip -9 -o rssbox.zip HEAD

While testing, it is a lot faster to deploy if there is only one instance running.

Upgrade major Ruby version

To upgrade an existing app to a new major version of Ruby:

aws elasticbeanstalk list-available-solution-stacks --query SolutionStacks
aws elasticbeanstalk update-environment --region us-west-2 --environment-name rssbox --solution-stack-name "64bit Amazon Linux 2018.03 v2.9.1 running Ruby 2.6 (Puma)"

Misc

Logs on the instances are available at:

  • /var/log/puma/puma.log