What is Calico

Calico a network policy engine for Kubernetes. With Calico network policy enforcement, you can implement network segmentation and tenant isolation. This is useful in multi-tenant environments where you must isolate tenants from each other or when you want to create separate environments for development, staging, and production.

Network policies are similar to AWS security groups in that you can create network ingress and egress rules. Instead of assigning instances to a security group, you assign network policies to pods using pod selectors and labels.

Calico can be used with AWS EKS but not with Fargate.

Calico adds rules to iptables on the node that may be higher priority than existing rules that you’ve already implemented outside of Calico. Consider adding existing iptables rules to your Calico policies to avoid having rules outside of Calico policy overridden by Calico.