Ansible Academy · Lesson

Rolling Deploy Behind the Load Balancer

Release with zero downtime in serial.

Zero Downtime Is the Promise

Update all web nodes without dropping a single request. The trick is a rolling deploy: change a few hosts at a time. 🔄

Add serial to your play so Ansible works through hosts in small waves instead of all at once.

- hosts: web
  serial: 1
  tasks:
    - import_role:
        name: webapp