Ruby APM with AWS Fargate
  • 23 Jun 2020
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Ruby APM with AWS Fargate

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This document details how to install the Ruby APM Profiler in your Ruby application running on AWS Fargate.

Stackify supports AWS Fargate by adding our Retrace Container to your AWS Fargate tasks.

aws-fargage-diagram

The configuration is in two parts; adjusting your Dockerfile config to include the appropriate Stackify profiler and then adjusting task/container definition configuration in AWS Fargate. The configuration details are provided below in JSON samples.

Ruby Application Setup

Add Stackify APM Module

Modify application Gemfile:

gem 'stackify-ruby-apm'

Configure Application

Add config/stackify_apm.yml to your application, modify application_name and environment_name.

application_name: 'Ruby Application'
environment_name: 'Production'

Rails

Profiler will startup automatically, no additional configuration.

Non-Rails

Include StackifyRubyAPM::Middleware when starting your application:

# config.ru

require 'stackify-ruby-apm'
use StackifyRubyAPM::Middleware
StackifyRubyAPM.start

# application startup

at_exit { StackifyRubyAPM.stop }

Task Configuration

  1. Add the stackify volume to the task definition:
{
  "volumes": [
    {
      "name": "stackify"
    }
  ]
}
  1. Add the stackify-retrace container to the task definition:
{
 "containerDefinitions": [
   {
     "name": "stackify-retrace",
     "image": "stackify/retrace:latest",
     "memoryReservation": "512",
     "essential": true,
     "environment": [
       {
         "name": "STACKIFY_KEY",
         "value": "[YOUR_ACTIVATION_KEY]"
       },
       {
         "name": "STACKIFY_ENV",
         "value": "[YOUR_ENVIRONMENT_NAME]"
       }, 
        {
         "name": "STACKIFY_DEVICE_ALIAS",
         "value": "AWS Fargate"
       }
     ],
     "mountPoints": [
       {
         "sourceVolume": "stackify",
         "containerPath": "/var/stackify"
       }
     ]
   }
 ]
}

Note: Replace [YOUR_ACTIVATION_KEY] and [YOUR_ENVIRONMENT_NAME].
Use Image stackify/retrace-arm64 if running on an ARM processor.

  1. Add stackify mount points to your application container definition:
{
  "containerDefinitions": [
    {
      "mountPoints": [
        {
          "sourceVolume": "stackify",
          "containerPath": "/usr/local/stackify"
        }
      ]
    }
  ]
}

Verify

Start up your Ruby application task and make requests. You can then verify results in the Retrace dashboard.

Server Metrics Notice
Server metrics are not provided with AWS Fargate. A server named AWS Fargate will be created but will not contain metrics.
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