Saves up to 90% of AWS EC2 costs by automating the use of spot instances on existing AutoScaling groups. Installs in minutes using CloudFormation or Terraform. Convenient to deploy at scale using StackSets. Uses tagging to avoid launch configuration changes. Automated spot termination handling. Reliable fallback to on-demand instances.
NTH Queue-Processor should catch the ASG Launch Lifecycle Hook and complete it once the node has joined the k8s cluster successfully. Since ASG considers the instance ready when EC2 health checks pass rather than when it actually joins the k8s cluster, if ASG performs Launch-Before-Terminate, a node could be terminated before the new node is ready to go.
Pretty frustrating trying to debug an issue only to have the EC2 instance self-destruct.
I've been manually applying this hack to the build.sh script, and it has worked really well for me. I figured I'd share it so that others may benefit...
Telescopes is a cloud instance types and full cluster layout recommender consisting of on-demand and spot/preemptible AWS EC2, Google, Azure, Oracle and Alibaba cloud instances.
NTH Queue-Processor should catch the ASG Launch Lifecycle Hook and complete it once the node has joined the k8s cluster successfully. Since ASG considers the instance ready when EC2 health checks pass rather than when it actually joins the k8s cluster, if ASG performs Launch-Before-Terminate, a node could be terminated before the new node is ready to go.