Graviton and ARM Nodes for Kubernetes: Lower Cost per vCPU
Blog post from Cast AI
Graviton3 and Graviton4 ARM-based instances offer significant cost savings in Kubernetes environments compared to Intel x86 instances, with Graviton3 being approximately 19% cheaper per vCPU and Graviton4 providing up to 30% more compute power. Between Q2 2024 and Q4 2025, ARM nodes grew 3.5 times faster than x86, now making up about 9% of CPUs in Kubernetes clusters. The main challenge in migrating to ARM in Kubernetes is ensuring DaemonSets have ARM64 image variants, as they are required for critical functionalities like monitoring and security tools. The migration process involves building multi-arch images, verifying DaemonSet compatibility, configuring scheduling, and testing incrementally, with the option to leverage tools like Cast AI for managing mixed-architecture clusters. ARM adoption is accelerating due to its economic benefits, and despite some compatibility challenges, it presents a viable strategy for reducing Kubernetes infrastructure costs.
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