69 lines
2.1 KiB
Markdown
69 lines
2.1 KiB
Markdown
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# kube-dns
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`kube-dns` schedules DNS Pods and Service on the cluster, other pods in cluster
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can use the DNS Service’s IP to resolve DNS names.
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* [Administrators guide](http://kubernetes.io/docs/admin/dns/)
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* [Code repository](http://www.github.com/kubernetes/dns)
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## Manually scale kube-dns Deployment
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kube-dns creates only one DNS Pod by default. If
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[dns-horizontal-autoscaler](../dns-horizontal-autoscaler/)
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is not enabled, you may need to manually scale kube-dns Deployment.
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Please use below `kubectl scale` command to scale:
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```
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kubectl --namespace=kube-system scale deployment kube-dns --replicas=<NUM_YOU_WANT>
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```
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Do not use `kubectl edit` to modify kube-dns Deployment object if it is
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controlled by [Addon Manager](../addon-manager/). Otherwise the modifications
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will be clobbered, in addition the replicas count for kube-dns Deployment will
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be reset to 1. See [Cluster add-ons README](../README.md) and
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[#36411](https://github.com/kubernetes/kubernetes/issues/36411) for reference.
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## kube-dns Deployment and Service templates
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This directory contains the base UNDERSCORE templates that can be used to
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generate the kubedns-controller.yaml.in and kubedns.controller.yaml.in needed in
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Salt format.
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Due to a varied preference in templating language choices, the transform
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Makefile in this directory should be enhanced to generate all required formats
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from the base underscore templates.
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**N.B.**: When you add a parameter you should also update the various scripts
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that supply values for your new parameter. Here is one way you might find those
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scripts:
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```
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cd kubernetes && git grep 'kubedns-controller.yaml'
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```
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### Base Template files
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These are the authoritative base templates.
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Run 'make' to generate the Salt and Sed yaml templates from these.
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```
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kubedns-controller.yaml.base
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kubedns-svc.yaml.base
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```
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### Generated Salt files
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```
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kubedns-controller.yaml.in
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kubedns-svc.yaml.in
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```
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### Generated Sed files
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```
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kubedns-controller.yaml.sed
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kubedns-svc.yaml.sed
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```
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[]()
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