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Update docs about etcd for events

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Wojciech Tyczynski 2015-12-18 12:11:42 +01:00
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docs/admin/cluster-large.md
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@ -62,6 +62,16 @@ To avoid running into cloud provider quota issues, when creating a cluster with
* Target pools
* Gating the setup script so that it brings up new node VMs in smaller batches with waits in between, because some cloud providers rate limit the creation of VMs.
### Etcd storage
To improve performance of large clusters, we store events in a separate dedicated etcd instance.
When creating a cluster, existing salt scripts:
* start and configure additional etcd instance
* configure api-server to use it for storing events
However, this is done only for clusters having more than 50 nodes.
### Addon Resources
To prevent memory leaks or other resource issues in [cluster addons](../../cluster/addons/) from consuming all the resources available on a node, Kubernetes sets resource limits on addon containers to limit the CPU and Memory resources they can consume (See PR [#10653](http://pr.k8s.io/10653/files) and [#10778](http://pr.k8s.io/10778/files)).