An in-depth look at 100% Zero Downtime deployments with Terraform
At Checkly, we run our browser checks on AWS EC2 instances managed by Terraform. When shipping a new version, we don’t want to interrupt our service, so we need zero downtime deployments. Hashicorp has their own write up on zero downtime upgrades, but it only introduces the Terraform configuration without any context, workflow or other details that are needed to actually make this work in real life™.