# Copyright 2016 The Kubernetes Authors.

#

# Licensed under the Apache License, Version 2.0 (the "License");

# you may not use this file except in compliance with the License.

# You may obtain a copy of the License at

#

# http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

# Should keep target in cluster/addons/dns-horizontal-autoscaler/dns-horizontal-autoscaler.yaml

# in sync with this file.

# Warning: This is a file generated from the base underscore template file: kube-dns.yaml.base

apiVersion: v1

kind: Service

metadata:

name: kube-dns

namespace: kube-system

labels:

k8s-app: kube-dns

kubernetes.io/cluster-service: "true"

addonmanager.kubernetes.io/mode: Reconcile

kubernetes.io/name: "KubeDNS"

spec:

selector:

k8s-app: kube-dns

clusterIP: dns_server

ports:

- name: dns

port: 53

protocol: UDP

- name: dns-tcp

port: 53

protocol: TCP

---

apiVersion: v1

kind: ServiceAccount

metadata:

name: kube-dns

namespace: kube-system

labels:

kubernetes.io/cluster-service: "true"

addonmanager.kubernetes.io/mode: Reconcile

---

apiVersion: v1

kind: ConfigMap

metadata:

name: kube-dns

namespace: kube-system

labels:

addonmanager.kubernetes.io/mode: EnsureExists

---

apiVersion: apps/v1

kind: Deployment

metadata:

name: kube-dns

namespace: kube-system

labels:

k8s-app: kube-dns

kubernetes.io/cluster-service: "true"

addonmanager.kubernetes.io/mode: Reconcile

spec:

# replicas: not specified here:

# 1. In order to make Addon Manager do not reconcile this replicas parameter.

# 2. Default is 1.

# 3. Will be tuned in real time if DNS horizontal auto-scaling is turned on.

strategy:

rollingUpdate:

maxSurge: 10%

maxUnavailable: 0

selector:

matchLabels:

k8s-app: kube-dns

template:

metadata:

labels:

k8s-app: kube-dns

annotations:

prometheus.io/port: "10054"

prometheus.io/scrape: "true"

spec:

priorityClassName: system-cluster-critical

securityContext:

seccompProfile:

type: RuntimeDefault

supplementalGroups: [ 65534 ]

fsGroup: 65534

affinity:

podAntiAffinity:

preferredDuringSchedulingIgnoredDuringExecution:

- weight: 100

podAffinityTerm:

labelSelector:

matchExpressions:

- key: k8s-app

operator: In

values: ["kube-dns"]

topologyKey: kubernetes.io/hostname

tolerations:

- key: "CriticalAddonsOnly"

operator: "Exists"

nodeSelector:

kubernetes.io/os: linux

volumes:

- name: kube-dns-config

configMap:

name: kube-dns

optional: true

nodeSelector:

kubernetes.io/os: linux

containers:

- name: kubedns

image: k8s.gcr.io/k8s-dns-kube-dns:1.15.10

resources:

# TODO: Set memory limits when we've profiled the container for large

# clusters, then set request = limit to keep this container in

# guaranteed class. Currently, this container falls into the

# "burstable" category so the kubelet doesn't backoff from restarting it.

limits:

memory: 'dns_memory_limit'

requests:

cpu: 100m

memory: 70Mi

livenessProbe:

httpGet:

path: /healthcheck/kubedns

port: 10054

scheme: HTTP

initialDelaySeconds: 60

timeoutSeconds: 5

successThreshold: 1

failureThreshold: 5

readinessProbe:

httpGet:

path: /readiness

port: 8081

scheme: HTTP

# we poll on pod startup for the Kubernetes master service and

# only setup the /readiness HTTP server once that's available.

initialDelaySeconds: 3

timeoutSeconds: 5

args:

- --domain=dns_domain.

- --dns-port=10053

- --config-dir=/kube-dns-config

- --v=2

env:

- name: PROMETHEUS_PORT

value: "10055"

ports:

- containerPort: 10053

name: dns-local

protocol: UDP

- containerPort: 10053

name: dns-tcp-local

protocol: TCP

- containerPort: 10055

name: metrics

protocol: TCP

volumeMounts:

- name: kube-dns-config

mountPath: /kube-dns-config

securityContext:

allowPrivilegeEscalation: false

readOnlyRootFilesystem: true

runAsUser: 1001

runAsGroup: 1001

- name: dnsmasq

image: k8s.gcr.io/k8s-dns-dnsmasq-nanny:1.15.10

livenessProbe:

httpGet:

path: /healthcheck/dnsmasq

port: 10054

scheme: HTTP

initialDelaySeconds: 60

timeoutSeconds: 5

successThreshold: 1

failureThreshold: 5

args:

- -v=2

- -logtostderr

- -configDir=/etc/k8s/dns/dnsmasq-nanny

- -restartDnsmasq=true

- --

- -k

- --cache-size=1000

- --no-negcache

- --dns-loop-detect

- --log-facility=-

- --server=/dns_domain/127.0.0.1#10053

- --server=/in-addr.arpa/127.0.0.1#10053

- --server=/ip6.arpa/127.0.0.1#10053

ports:

- containerPort: 53

name: dns

protocol: UDP

- containerPort: 53

name: dns-tcp

protocol: TCP

# see: https://github.com/kubernetes/kubernetes/issues/29055 for details

resources:

requests:

cpu: 150m

memory: 20Mi

volumeMounts:

- name: kube-dns-config

mountPath: /etc/k8s/dns/dnsmasq-nanny

securityContext:

capabilities:

drop:

- all

add:

- NET_BIND_SERVICE

- SETGID

- name: sidecar

image: k8s.gcr.io/k8s-dns-sidecar:1.15.10

livenessProbe:

httpGet:

path: /metrics

port: 10054

scheme: HTTP

initialDelaySeconds: 60

timeoutSeconds: 5

successThreshold: 1

failureThreshold: 5

args:

- --v=2

- --logtostderr

- --probe=kubedns,127.0.0.1:10053,kubernetes.default.svc.dns_domain,5,SRV

- --probe=dnsmasq,127.0.0.1:53,kubernetes.default.svc.dns_domain,5,SRV

ports:

- containerPort: 10054

name: metrics

protocol: TCP

resources:

requests:

memory: 20Mi

cpu: 10m

securityContext:

allowPrivilegeEscalation: false

readOnlyRootFilesystem: true

runAsUser: 1001

runAsGroup: 1001

dnsPolicy: Default # Don't use cluster DNS.

serviceAccountName: kube-dns