Spot Scale and Sizing Guidelines

These are broad guidelines for scale and sizing of your Rackspace Spot deployments. Please note that while we generally expect to achieve these scale and performance metrics, these are not guaranteed.

If you are experiencing any challenges with scale or performance at scale, the product team would like to hear from you. We are continuously investing in improving scale and performance, so please get in touch.

Spot Control Plane Scale

Spot Control Plane Parameter	Current Scale
Number of Cloudspaces	25
Aggregate servers across all Cloudspaces	1000
Concurrent servers provisioned across all Cloudspaces	50

Spot Kubernetes Control Plane Scale

Kubernetes (Hosted) Control Plane	Specifications
Free Kubernetes Control Plane: apiserver & etcd	1 apiserver, 1 etcd
Free Kubernetes Control Plane: # Nodes in a Cloudspace	50
Free Kubernetes Control Plane: Scales with number of nodes	Yes, upto 50 nodes
Highly available Kubernetes Control Plane: apiserver & etcd	5 apiservers, 3 etcd
Highly available Kubernetes Control Plane: # Nodes in a Cloudspace	150
Highly available Kubernetes Control Plane: Scales with number of nodes	Yes, upto 150 nodes

Spot Server Provisioning Performance

Spot Server Provisioning Parameters	Specifications
Time to deploy Kubernetes control plane	~1 minute
Time to pre-empt and reassign servers following an auction	6 minutes notice period + time to provision server
Time to provision servers (A) Rackspace undercloud time to provision servers	5-30 minutes (under-cloud v1) 3-10 minutes (under-cloud v2)
Time to provision servers (B) Spot time to attach provisioned servers to Kubernetes control plane	5-15 minutes

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