Changes

This document outlines the changes from Version 2 (date-based version) Racks to Version 3.x Racks.

Racks

Generation 1

Generation 1 Apps are no longer supported

Infrastructure Providers

Version 2

• AWS (ECS)

Version 3

• AWS (EKS)
• Digital Ocean
• Google Cloud
• Microsoft Azure

Apps

Agent Ports

Agent ports are now defined at the service level instead of underneath the agent: block:

Version 2

    services:
      datadog:
        agent:
          ports:
            - 8125/udp
            - 8126/tcp

Version 3

    services:
      datadog:
        agent: true
        ports:
          - 8125/udp
          - 8126/tcp

Scaling

On v3 Racks, the convox scale {service} CLI command can be used to update the count value only. Changes to CPU or Memory values will not be enacted. These values should be changed in the convox.yml directly.

Sticky Sessions

App services are no longer sticky by default. Sticky sessions can be enabled in convox.yml:

    services
      web:
        sticky: true

Timer Syntax

Timers no longer follow the AWS scheduled events syntax where you must have a ? in either day-of-week or day-of-month column.

Timers now follow the standard cron syntax

As an example a Timer that runs every hour has changed as follows:

Version 2

    timers:
      hourlyjob:
        schedule: 0 * * ? *

Version 3

    timers:
      hourlyjob:
        schedule: 0 * * * *

You can read more in the Timer documentation section