在centos 7中安装配置k8s集群的步骤详解
配置背景介绍
kubernetes是google开源的容器集群管理系统，提供应用部署、维护、扩展机制等功能，利用kubernetes能方便管理跨集群运行容器化的应用，简称：k8s（k与s之间有8个字母）
为什么要用kubernetes这么复杂的docker集群管理工具呢？一开始接触了docker内置的swarm，这个工具非常简单快捷的完成docker集群功能。但是在使用docker1.13内置的swarm做集群的时候遇到vip负载均衡没有正确映射端口到外网，或者出现地址被占用的情况，这对高可用性的需求是不利的，然而又没找到一个解决方案，只能转投k8s。
实验环境
- 腾讯云
- centos7.364位
安装
yum-config-manager--add-repohttps://docs.docker.com/v1.13/engine/installation/linux/repo_files/centos/docker.repo yummakecachefast yum-yinstalldocker-engine-1.13.1 yuminstallepel-release-y yumremove-ydocker-engine* yuminstall-ykubernetesetcddockerflannel
修改配置文件
注意下面的10.135.163.237换成自己服务器ip
sed-i"s/localhost:2379/10.135.163.237:2379/g"/etc/etcd/etcd.conf sed-i"s/localhost:2380/10.135.163.237:2380/g"/etc/etcd/etcd.conf sed-i"s/10.135.163.237:2379/10.135.163.237:2379,http:\/\/127.0.0.1:2379/g"/etc/etcd/etcd.conf sed-i"s/127.0.0.1:2379/10.135.163.237:2379/g"/etc/kubernetes/apiserver sed-i"s/--insecure-bind-address=127.0.0.1/--insecure-bind-address=0.0.0.0/g"/etc/kubernetes/apiserver sed-i"s/--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota/--admission_control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota/g"/etc/kubernetes/apiserver sed-i"s/--hostname-override=127.0.0.1/--hostname-override=10.135.163.237/g"/etc/kubernetes/kubelet sed-i"s/127.0.0.1:8080/10.135.163.237:8080/g"/etc/kubernetes/kubelet sed-i"s/--address=127.0.0.1/--address=0.0.0.0/g"/etc/kubernetes/kubelet sed-i"s/127.0.0.1:8080/10.135.163.237:8080/g"/etc/kubernetes/config sed-i"s/127.0.0.1:2379/10.135.163.237:2379/g"/etc/sysconfig/flanneld
修改host
vi/etc/hosts 10.135.163.237k8s_master
添加网络
systemctlenableetcd.service
systemctlstartetcd.service
etcdctlmk//atomic.io/network/config'{"Network":"172.17.0.0/16"}'
启动服务
servicedockerstart forSERVICESinetcdkube-apiserverkube-controller-managerkube-schedulerkube-proxykubeletdockerflanneld;dosystemctlrestart$SERVICES;systemctlenable$SERVICES;systemctlstatus$SERVICES;done;
第一个demo
编写文件a.yaml
apiVersion:extensions/v1beta1 kind:Deployment metadata: name:my-app spec: replicas:2 template: metadata: labels: app:my-app spec: containers: -name:my-app image:registry.alauda.cn/yubang/paas_base_test ports: -containerPort:80 command:["/bin/bash","/var/start.sh"] resources: limits: cpu:0.5 memory:64Mi
编写文件b.yaml
apiVersion:v1 kind:Service metadata: name:my-app-svc labels: app:my-app spec: ports: -port:80 targetPort:80 nodePort:30964 type:NodePort selector: app:my-app
创建服务
kubectlcreate-fa.yaml--validate kubectlcreate-fb.yaml--validate
删除服务
kubectldelete-fa.yaml kubectldelete-fb.yaml
增加子节点
安装软件
yum-config-manager--add-repohttps://docs.docker.com/v1.13/engine/installation/linux/repo_files/centos/docker.repo yummakecachefast yum-yinstalldocker-engine-1.13.1 yuminstallepel-release-y yumremove-ydocker-engine* yuminstall-ykubernetesdockerflannel
修改配置文件（10.135.163.237为主节点ip，139.199.0.29为当前节点ip）
sed-i"s/--hostname-override=127.0.0.1/--hostname-override=139.199.0.29/g"/etc/kubernetes/kubelet sed-i"s/127.0.0.1:8080/10.135.163.237:8080/g"/etc/kubernetes/kubelet sed-i"s/--address=127.0.0.1/--address=0.0.0.0/g"/etc/kubernetes/kubelet sed-i"s/127.0.0.1:8080/10.135.163.237:8080/g"/etc/kubernetes/config sed-i"s/127.0.0.1:2379/10.135.163.237:2379/g"/etc/sysconfig/flanneld sed-i"s/--admission-control=NamespaceLifecycle,NamespaceExists,LimitRanger,SecurityContextDeny,ServiceAccount,ResourceQuota/--admission_control=NamespaceLifecycle,NamespaceExists,LimitRanger,ResourceQuota/g"/etc/kubernetes/apiserver
启动服务
servicedockerstart forSERVICESinkube-proxykubeletdockerflanneld;do systemctlrestart$SERVICES systemctlenable$SERVICES systemctlstatus$SERVICES done;
在主服务器查看节点
kubectlgetnode
重启服务（重新加入集群）
systemctlrestartkube-apiserver.service
删除节点
kubectldeletenode节点ip
总结
以上就是这篇文章的全部内容了，希望本文的内容对大家的学习或者工作具有一定的参考学习价值，如果有疑问大家可以留言交流，谢谢大家对毛票票的支持。