Last updated October 11, 2021
This article describes the Cedar-14 stack, based on Ubuntu 14.04. What is a stack?
Cedar-14 is based on Ubuntu 14.04, which reached end-of-life on May 1st 2019. Learn more about Heroku’s stack update policy.
It is no longer possible to create new Cedar-14 apps, or to perform builds (code-deployments) on existing apps without first upgrading them to a newer stack.
See the Cedar-14 End-Of-Life FAQ for more details.
Cedar-14 Docker image
Cedar-14 is available as a Docker image.
Use the following command in your
Dockerfile to use Cedar-14 as your base image: