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http://kubernetes.io/docs/admin/cluster-large/

Minimum cluster size

David has suggested the following minimum cluster size:

  • 3 etcd (m1.small)
  • 1 master (m1.medium)
  • 3-4 compute
  • 4 gfs (m1.medium)

GCE sizing

The file kubernetes/cluster/gce/config-common.sh contains the following:

  • NUM_NODES=5, suggested_master_size=2
  • NUM_NODES=10, suggested_master_size=4
  • NUM_NODES=100, suggested_master_size=8
  • NUM_NODES=250, suggested_master_size=16
  • NUM_NODES=500, suggested_master_size=32

This is actually the node size. There's no indication that either GCE and AWS use multiple masters, just bigger masters – even with hundred-node setups.

config-default.sh

  • NODE_SIZE=n1-standard-2
  • NUM_NODES=3
  • MASTER_DISK_SIZE=20GB
  • NODE_DISK_SIZE=100GB

The GCE setup in Kubernetes does not indicate separate servers for etcd, but they do mention using a separate etcd for events.

See also

Heapster scalability testing

GET operations do not always work on 500 node GCE cluster

API status for pods is flaky

 

 

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