k3s/cluster/addons/dns

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 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. 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 and #36411 for reference.

kube-dns Deployment and Service templates

This directory contains the base UNDERSCORE templates that can be used to generate the kubedns-controller.yaml.in and kubedns.controller.yaml.in needed in Salt format.

Due to a varied preference in templating language choices, the transform Makefile in this directory should be enhanced to generate all required formats from the base underscore templates.

NOTE WELL: Developers, when you add a parameter you should also update the various scripts that supply values for your new parameter. Here is one way you might find those scripts:

cd kubernetes
find [a-zA-Z0-9]* -type f -exec grep kubedns-controller.yaml \{\} \; -print -exec echo \;

Base Template files

These are the authoritative base templates. Run 'make' to generate the Salt and Sed yaml templates from these.

kubedns-controller.yaml.base kubedns-svc.yaml.base

Generated Salt files

kubedns-controller.yaml.in kubedns-svc.yaml.in

Generated Sed files

kubedns-controller.yaml.sed kubedns-svc.yaml.sed