opsworks_delayed_job

These recipes set up an AWS OpsWorks instance to run delayed_job workers for a Rails application.

Configuration Examples

By default, 4 delayed_job workers will be configured. To customize this, you may override the delayed_job.pool_size attribute in your stack's custom JSON:

{
  "delayed_job": { "pool_size": 6 }
}

Specify an alternate delayed_job script location by overriding the delayed_job.path_to_script attribute in your stack's custom JSON. The default, bin was added in Rails 4. For pre-Rails 4 projects, set it to script:

{
  "delayed_job": { "pool_size": 3, "path_to_script": "script" }
}

By default, workers will read from all queues. You can also specify custom queues parameters by adding attributes corresponding to each instance name and worker process. You can set a specific value for --sleep-delay seconds with a sleep_delay parameter. A special default pool can be specified to supply configuration for instances that don't otherwise appear in the JSON:

{
  "delayed_job": {
    "YOUR_APP_NAME": {
      "pools": {
        "worker1": {
          "0": { "queues": "highpriority,images" },
          "1": { "queues": "emails" },
          "2": { "queues": "bidding", "sleep_delay": 1 }
        },
        "default": {
          "0": { "queues": "emails" },
          "1": { "queues": "emails" },
          "2": { "queues": "emails" }
        }
      }
    }
  }
}

OpsWorks Set-Up

Create a custom layer for the delayed_job instances. Add the AWS-OpsWorks-Rails-App-Server security group to the layer, so that the instances have the usual cache and database access. Then, assign this cookbook's custom chef recipes to OpsWorks events as follows:

• Setup: opsworks_delayed_job::setup
• Configure: opsworks_delayed_job::configure
• Deploy: opsworks_delayed_job::deploy
• Undeploy: opsworks_delayed_job::undeploy
• Shutdown: opsworks_delayed_job::stop

To Do

• Attributes should be better structured (allowing customization without requiring all worker processes to be listed).

© 2013-2015 Joey Aghion, Artsy. MIT License.