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Adds docs for dns-horizontal-autoscaler and kube-dns

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Zihong Zheng 2016-12-07 11:36:08 -08:00
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cluster/addons/dns-horizontal-autoscaler/MAINTAINERS.md Normal file
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# Maintainers
Zihong Zheng <zihongz@google.com>
[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/cluster/addons/dns-horizontal-autoscaler/MAINTAINERS.md?pixel)]()

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cluster/addons/dns-horizontal-autoscaler/README.md Normal file
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# DNS Horizontal Autoscaler
DNS Horizontal Autoscaler enables horizontal autoscaling feature for DNS service
in Kubernetes clusters. This autoscaler runs as a Deployment. It collects cluster
status from the APIServer, horizontally scales the number of DNS backends based
on demand. Autoscaling parameters could be tuned by modifying the `kube-dns-autoscaler`
ConfigMap in `kube-system` namespace.
Learn more at: https://github.com/kubernetes-incubator/cluster-proportional-autoscaler
[![Analytics](https://kubernetes-site.appspot.com/UA-36037335-10/GitHub/cluster/addons/dns-horizontal-autoscaler/README.md?pixel)]()

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cluster/addons/dns/README.md
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# SkyDNS Replication Controllers and Service templates
# kube-dns
kube-dns schedules DNS Pods and Service on the cluster, other pods in cluster can
use the DNS Service’s IP to resolve DNS names.
More details on http://kubernetes.io/docs/admin/dns/.
## Manually scale kube-dns Deployment
kube-dns creates only one DNS Pod by default. If
[dns-horizontal-autoscaler](../dns-horizontal-autoscaler/)
is not enabled, you may need to manually scale kube-dns Deployment.
Please use below `kubectl scale` command to scale:
```
kubectl --namespace=kube-system scale deployment kube-dns --replicas=<NUM_YOU_WANT>
```
Do not use `kubectl edit` to modify kube-dns Deployment object if it is controlled by
[Addon Manager](../addon-manager/). Otherwise the modifications will be clobbered,
in addition the replicas count for kube-dns Deployment will be reset to 1. See
[Cluster add-ons README](../README.md) and [#36411](https://github.com/kubernetes/kubernetes/issues/36411)
for reference.
## kube-dns Deployment and Service templates
This directory contains the base UNDERSCORE templates that can be used
to generate the skydns-rc.yaml.in and skydns.rc.yaml.in needed in Salt format.
@ -15,7 +37,7 @@ cd kubernetes
find [a-zA-Z0-9]* -type f -exec grep skydns-rc.yaml \{\} \; -print -exec echo \;
```
## Base Template files
### Base Template files
These are the authoritative base templates.
Run 'make' to generate the Salt and Sed yaml templates from these.
@ -23,12 +45,12 @@ Run 'make' to generate the Salt and Sed yaml templates from these.
skydns-rc.yaml.base
skydns-svc.yaml.base
## Generated Salt files
### Generated Salt files
skydns-rc.yaml.in
skydns-svc.yaml.in
## Generated Sed files
### Generated Sed files
skydns-rc.yaml.sed
skydns-svc.yaml.sed