1、在每个节点上面导入如下镜像
[root@node1 DNS]# ll
total 59816
-rw-r--r--. 1 root root 8603136 Nov 25 18:13 exechealthz-amd64.tar.gz
-rw-r--r--. 1 root root 47218176 Nov 25 18:13 kubedns-amd64.tar.gz
-rw-r--r--. 1 root root 5424640 Nov 25 18:13 kube-dnsmasq-amd64.tar.gz
准备好如下文件
[root@manager ~]# cat kubedns-deployment.yaml
# Copyright 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. # TODO - At some point, we need to rename all skydns-*.yaml.* files to kubedns-*.yaml.*
# 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: skydns-rc.yaml.base apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: kube-dns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
spec:
replicas:
# replicas: not specified here:
# . In order to make Addon Manager do not reconcile this replicas parameter.
# . Default is .
# . Will be tuned in real time if DNS horizontal auto-scaling is turned on.
strategy:
rollingUpdate:
maxSurge: %
maxUnavailable:
selector:
matchLabels:
k8s-app: kube-dns
template:
metadata:
labels:
k8s-app: kube-dns
annotations:
scheduler.alpha.kubernetes.io/critical-pod: ''
scheduler.alpha.kubernetes.io/tolerations: '[{"key":"CriticalAddonsOnly", "operator":"Exists"}]'
spec:
containers:
- name: kubedns
image: hub.c..com/allan1991/kubedns-amd64:1.9
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: 170Mi
requests:
cpu: 100m
memory: 70Mi
livenessProbe:
httpGet:
path: /healthz-kubedns
port:
scheme: HTTP
initialDelaySeconds:
timeoutSeconds:
successThreshold:
failureThreshold:
readinessProbe:
httpGet:
path: /readiness
port:
scheme: HTTP
# we poll on pod startup for the Kubernetes master service and
# only setup the /readiness HTTP server once that's available.
initialDelaySeconds:
timeoutSeconds:
args:
- --kube-master-url=http://192.168.10.220:8080 #修改成自己的ip
- --domain=cluster.local.
- --dns-port=
- --config-map=kube-dns
# This should be set to v= only after the new image (cut from 1.5) has
# been released, otherwise we will flood the logs.
- --v=
# {{ pillar['federations_domain_map'] }}
env:
- name: PROMETHEUS_PORT
value: ""
ports:
- containerPort:
name: dns-local
protocol: UDP
- containerPort:
name: dns-tcp-local
protocol: TCP
- containerPort:
name: metrics
protocol: TCP
- name: dnsmasq
image: hub.c..com/allan1991/kube-dnsmasq-amd64:1.4
livenessProbe:
httpGet:
path: /healthz-dnsmasq
port:
scheme: HTTP
initialDelaySeconds:
timeoutSeconds:
successThreshold:
failureThreshold:
args:
- --cache-size=
- --no-resolv
- --server=127.0.0.1#
- --log-facility=-
ports:
- containerPort:
name: dns
protocol: UDP
- containerPort:
name: dns-tcp
protocol: TCP
# see: https://github.com/kubernetes/kubernetes/issues/29055 for details
resources:
requests:
cpu: 150m
memory: 10Mi
# - name: dnsmasq-metrics
# image: gcr.io/google_containers/dnsmasq-metrics-amd64:1.0
# livenessProbe:
# httpGet:
# path: /metrics
# port:
# scheme: HTTP
# initialDelaySeconds:
# timeoutSeconds:
# successThreshold:
# failureThreshold:
# args:
# - --v=
# - --logtostderr
# ports:
# - containerPort:
# name: metrics
# protocol: TCP
# resources:
# requests:
# memory: 10Mi
- name: healthz
image: hub.c..com/allan1991/exechealthz-amd64:1.2
resources:
limits:
memory: 50Mi
requests:
cpu: 10m
# Note that this container shouldn't really need 50Mi of memory. The
# limits are set higher than expected pending investigation on #.
# The extra memory was stolen from the kubedns container to keep the
# net memory requested by the pod constant.
memory: 50Mi
args:
- --cmd=nslookup kubernetes.default.svc.cluster.local 127.0.0.1 >/dev/null
- --url=/healthz-dnsmasq
- --cmd=nslookup kubernetes.default.svc.cluster.local 127.0.0.1: >/dev/null
- --url=/healthz-kubedns
- --port=
- --quiet
ports:
- containerPort:
protocol: TCP
dnsPolicy: Default # Don't use cluster DNS.
[root@manager ~]# cat kubedns-svc.yaml
# Copyright 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. # This file should be kept in sync with cluster/images/hyperkube/dns-svc.yaml # TODO - At some point, we need to rename all skydns-*.yaml.* files to kubedns-*.yaml.* # Warning: This is a file generated from the base underscore template file: skydns-svc.yaml.base apiVersion: v1
kind: Service
metadata:
name: kube-dns
namespace: kube-system
labels:
k8s-app: kube-dns
kubernetes.io/cluster-service: "true"
kubernetes.io/name: "KubeDNS"
spec:
selector:
k8s-app: kube-dns
clusterIP: 10.10.10.2
ports:
- name: dns
port:
protocol: UDP
- name: dns-tcp
port:
protocol: TCP
检查结果
[root@manager ~]# kubectl create -f kubedns-svc.yaml
service "kube-dns" created
[root@manager ~]#
[root@manager ~]# kubectl create -f kubedns-deployment.yaml
deployment "kube-dns" created
[root@manager ~]#
[root@manager ~]# kubectl get pods --namespace=kube-system -l k8s-app=kube-dns
NAME READY STATUS RESTARTS AGE
kube-dns-56d46f58f-6hhsl / Running 14s
kube-dns-56d46f58f-lnr86 / Running 14s
kube-dns-56d46f58f-nbbxp / Running 14s
[root@manager ~]#
[root@manager ~]# kubectl get pods --namespace=kube-system -l k8s-app=kube-dns -o wide
NAME READY STATUS RESTARTS AGE IP NODE
kube-dns-56d46f58f-6hhsl / Running 26s 10.0.71.4 192.168.10.222
kube-dns-56d46f58f-lnr86 / Running 26s 10.0.91.4 192.168.10.221
kube-dns-56d46f58f-nbbxp / Running 26s 10.0.91.5 192.168.10.221
验证结果
