Rancher Requirements

RKE

high-availability RKE cluster

• Three Linux nodes, typically virtual machines, in an infrastructure provider such as Amazon’s EC2, Google Compute Engine, or vSphere.

These nodes must be in the same region/data center. You may place these servers in separate availability zones.

Rancher server data is stored on etcd database that runs on all three nodes.

• etcd is a distributed reliable key-value store for the most critical data of a distributed system, with a focus: Simple, Secure, Fast & Reliable.

etcd database requires an odd number of nodes so that it can always elect a leader with a majority of the etcd cluster.

general installation requirements for OS, container runtime, hardware, and networking.

DEPLOYMENT SIZE CLUSTERS NODES VCPUS RAM Small Up to 150 Up to 1500 2 8 GB Medium Up to 300 Up to 3000 4 16 GB Large Up to 500 Up to 5000 8 32 GB X-Large Up to 1000 Up to 10,000 16 64 GB XX-Large Up to 2000 Up to 20,000 32 128 GB

Contact Rancher for more than 2000 clusters and/or 20,000 nodes.

• A load balancer to direct front-end traffic to the three nodes.
• A DNS record to map a URL to the load balancer. This will become the Rancher server URL, and downstream Kubernetes clusters will need to reach it.