kubernetes 之dns 服务发现
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
kubernetes 之dns 服务发现的更多相关文章
- 从零开始入门 | Kubernetes 中的服务发现与负载均衡
作者 | 阿里巴巴技术专家 溪恒 一.需求来源 为什么需要服务发现 在 K8s 集群里面会通过 pod 去部署应用,与传统的应用部署不同,传统应用部署在给定的机器上面去部署,我们知道怎么去调用别的机 ...
- Kubernetes 中的服务发现与负载均衡
原文:https://www.infoq.cn/article/rEzx9X598W60svbli9aK (本文转载自阿里巴巴云原生微信公众号(ID:Alicloudnative)) 一.需求来源 为 ...
- k8s DNS 服务发现的一个坑
按照官当文档,以及大家的实践进行k8s dns 服务发现搭建还是比较简单的,但是会有一个因为系统默认dns 配置造成的一个问题 1. linux 默认dns 配置在 /etc/resolv.conf ...
- Prometheus在Kubernetes下的服务发现机制
Prometheus作为容器监控领域的事实标准,随着以Kubernetes为核心的云原生热潮的兴起,已经得到了广泛的应用部署.灵活的服务发现机制是Prometheus和Kubernetes两者得以连接 ...
- k8s中的dns服务发现
一.dns服务 1.解决的问题 为了通过服务的名字在集群内进行服务相互访问,需要创建一个dns服务 2.k8s中使用的虚拟dns服务是skydns 二.搭建 1.创建并应用skydns-rc.yaml ...
- Docker Kubernetes 服务发现原理详解
Docker Kubernetes 服务发现原理详解 服务发现支持Service环境变量和DNS两种模式: 一.环境变量 (默认) 当一个Pod运行到Node,kubelet会为每个容器添加一组环境 ...
- Kubernetes 服务发现
目录 什么是服务发现? 环境变量 DNS 服务 Linux 中 DNS 查询原理 Kubernetes 中 DNS 查询原理 调试 DNS 服务 存根域及上游 DNS 什么是服务发现? 服务发现就是一 ...
- Istio技术与实践02:源码解析之Istio on Kubernetes 统一服务发现
前言 文章Istio技术与实践01: 源码解析之Pilot多云平台服务发现机制结合Pilot的代码实现介绍了Istio的抽象服务模型和基于该模型的数据结构定义,了解到Istio上只是定义的服务发现的接 ...
- Nacos发布0.5.0版本,轻松玩转动态 DNS 服务
阿里巴巴微服务开源项目Nacos于近期发布v0.5.0版本,该版本主要包括了DNS-basedService Discovery,对Java 11的支持,持续优化Nacos产品用户体验,更深度的与Sp ...
随机推荐
- IE脚本调试
打开IE -- 工具 -- Internet选项 -- 高级 --有4项. 1.禁用脚本调试(Internet Explorer)(去掉对勾) 2.禁用脚本调试(其他)(去掉对勾) 3.显示每个脚本错 ...
- Vmware 不能上网
Vmware 安装 WIN7 不能上网,如何解决? 情况一: 虚拟机右下角出现红色叉号,检查物理的服务是否开启“VMware NAT Service” 1 .开启方法:WIN + R -> 输入 ...
- 【Linux】linux 机器之间 zssh, rz, sz互相传输
服务器端安装lrzsz: sudo yum install lrzsz 本地客户端安装lrzsz: brew install lrzsz 本地客户端安装zssh: brew install zssh ...
- 在生产环境下实现每天自动备份mysql数据库
1.描述 我相信很多朋友在工作都都会有这种需求,老板或领导让你每天都要备份mysql数据库,你该如何实现呢,是每天到一定的时间在服务器上敲一遍mysql的备份命令,还是想写个脚本,定时定点的自动备份呢 ...
- C语言实现判断分数等级
从屏幕上输入一个学生的成绩(0-100),对学生成绩进行评定: <=60为"E" 60~69为"D" 70~79为"C" 80~89为 ...
- 递推:Number Sequence(mod找规律)
解题心得: 1.对于数据很大,很可怕,不可能用常规手段算出最后的值在进行mod的时候,可以思考找规律. 2.找规律时不必用手算(我傻,用手算了好久).直接先找前100项进行mod打一个表出来,直接看就 ...
- POJ 2311 Cutting Game(SG函数)
Cutting Game Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 4806 Accepted: 1760 Desc ...
- [网站公告]又拍云API故障造成图片无法上传(已恢复)
大家好,18:00左右开始,又拍云API出现故障,调用图片上传API时出现错误:“The remote server returned an error: (403) Forbidden.”,造成图片 ...
- 手机APP设计网
http://hao.xueui.cn/ http://www.25xt.com/
- IOS开发学习笔记036-UIScrollView-循环自动滚动
实现scrollView的自动循环滚动,需要实现几个方法. 其中scrollView中始终保存三张图片,其他的图片在滚动到时再进行加载. 循环的实现主要是在setUpdate 中,如果索引为0是第一个 ...