Success Story
Buenbit unlocks pod scalability on Amazon EKS in 30 days
At a glance
Buenbit is an Argentine fintech that lets users buy, sell and invest in cryptocurrencies and digital assets, with all of its infrastructure on AWS on an EKS microservices cluster. The cluster was reaching its pods-per-node limit because of how subnet IPs were allocated. In 30 days, Craftech redesigned the network and enabled Prefix Delegation: Buenbit can now scale its microservices without adding nodes.
Buenbit is an Argentine fintech founded in 2018 that lets users buy, sell and invest in cryptocurrencies and digital assets. It operates in Argentina, Peru and Mexico, with all of its infrastructure on AWS on an EKS microservices cluster.
Solution implemented
- Analyzed the network of the Amazon EKS cluster
- Modified the VPC and subnet CIDR with the ranges needed for higher pod density
- Configured the Amazon VPC CNI add-on in Prefix Delegation mode to extend the number of IPs (pods) per EC2 instance
Business Challenge
Buenbit's EKS cluster was reaching its pods-per-node limit because of how subnet IPs were allocated. There were two problems: the VPC and subnet range meant they ran out of IPs when scaling pods, and EC2 instances were oversized because they could not be fully used due to the IP (pod) limit per instance.
Solution
Craftech analyzed the cluster network and modified the VPC and subnet CIDR with the ranges needed for higher pod density. It also configured the Amazon VPC CNI add-on in Prefix Delegation mode to extend the number of IPs (pods) per EC2 instance. As a result, Buenbit can scale its microservices without adding nodes, making better use of its existing infrastructure.
Outcomes
- New VPC and subnets in place
- Prefix Delegation mode active on EKS
- Pod scalability unlocked without changing the EC2 instance type
Stack & technologies
