epostnikof/kubespray
1
0
Fork 0
mirror of https://github.com/kubernetes-sigs/kubespray.git synced 2025-12-14 13:54:37 +03:00
Code Issues Packages Projects Releases Wiki Activity

Add scale thresholds to split etcd and k8s-masters

Browse Source 
Also adds calico-rr group if there are standalone etcd nodes.
Now if there are 50 or more nodes, 3 etcd nodes will be standalone.
If there are 200 or more nodes, 2 kube-masters will be standalone.
If thresholds are exceeded, kube-node group cannot add nodes that
belong to etcd or kube-master groups (according to above statements).
This commit is contained in:
Matthew Mosesohn
2017-01-11 18:15:04 +03:00
parent 5420fa942e
commit f742fc3dd1
6 changed files with 96 additions and 62 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
docs/large-deployments.md
View File

@@ -27,5 +27,15 @@ For a large scaled deployments, consider the following configuration changes:
end up with the 'm' skipped for docker as well. This is required as docker does not
understand k8s units well.
* Add calico-rr nodes if you are deploying with Calico or Canal. Nodes recover
from host/network interruption much quicker with calico-rr. Note that
calico-rr role must be on a host without kube-master or kube-node role (but
etcd role is okay).
* Check out the
[Inventory](https://github.com/kubernetes-incubator/kargo/blob/master/docs/getting-started.md#building-your-own-inventory)
section of the Getting started guide for tips on creating a large scale
Ansible inventory.
For example, when deploying 200 nodes, you may want to run ansible with
``--forks=50``, ``--timeout=600`` and define the ``retry_stagger: 60``.