yum 安装 Kubernete

修改主机和host解析

10.0.0.11  k8s-master
10.0.0.12  k8s-node-1
10.0.0.13  k8s-node-2

添加 host解析

echo ‘mirrors.aliyun.com’ >>/etc/hosts

构建国内yum源：

下载国内yum源文件（aliyun）

wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

如果是最小安装，系统里没有wget命令，就使用下面的命令来实现

curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo

所有节点安装docker (docker版本为1.12.6)

wget  http://mirrors.aliyun.com/docker-common-1.12.6-71.git3e8e77d.el7.centos.x86_64.rpm
wget http://mirrors.aliyun.com/docker-client-1.12.6-71.git3e8e77d.el7.centos.x86_64.rpm
wget http://mirrors.aliyun.com/docker-1.12.6-71.git3e8e77d.el7.centos.x86_64.rpm

安装先后顺序

yum localinstall docker-common-1.12.6-71.git3e8e77d.el7.centos.x86_64.rpm -y
yum localinstall docker-client-1.12.6-71.git3e8e77d.el7.centos.x86_64.rpm -y
yum localinstall docker-1.12.6-71.git3e8e77d.el7.centos.x86_64.rpm -y

master

master节点安装etcd(k8s数据库kv类型存储) 原生支持做集群 只在master 安装

yum install etcd.x86_64 -y

修改配置文件

 vim /etc/etcd/etcd.conf
第6行：ETCD_LISTEN_CLIENT_URLS="http://0.0.0.0:2379"
第21行：ETCD_ADVERTISE_CLIENT_URLS="http://10.0.0.11:2379"

启动服务（2379 2380）

systemctl start etcd.service
systemctl enable etcd.service

设置键值

etcdctl set testdir/testkey0 0

查看键值

etcdctl get testdir/testkey0

集群的健康检查（cluster is healthy）

etcdctl -C http://10.0.0.11:2379 cluster-health

master节点安装kubernetes

yum install kubernetes-master.x86_64 -y

修改配置文件

辅助配置

vim /etc/kubernetes/config 
~~~~~~~~~~~~~~~~
22行 KUBE_MASTER="--master=http://10.0.0.11:8080"
核心配置文件

vim /etc/kubernetes/kubelet
~~~~~~~~~~~~~~~~~~~~
  5行 KUBELET_ADDRESS="--address=0.0.0.0"
  8行 KUBELET_PORT="--port=10250"
 11行 KUBELET_HOSTNAME="--hostname-override=k8s-node-1"
 14行 KUBELET_API_SERVER="--api-servers=http://10.0.0.11:8080"
kubelet： 调用docker管理容器的生命周期 kube-proxy： 提供容器网络访问

启动服务

systemctl enable kubelet.service
systemctl start kubelet.service
systemctl enable kube-proxy.service
systemctl start kube-proxy.service

可以在master查看

kubectl get nodes
~~~~~~~~~~~~~~~~~~~~~~~~
NAME        STATUS    AGE
10.0.0.12   Ready     3m
10.0.0.13   Ready     8s

所有节点配置flannel网络

安装flannel

yum install flannel -y

修改配置文件

sed -i 's#http://127.0.0.1:2379#http://10.0.0.11:2379#g' /etc/sysconfig/flanneld

master节点：

etcdctl mk /atomic.io/network/config '{ "Network": "172.16.0.0/16" }'
	systemctl enable flanneld.service 
	systemctl start flanneld.service 
	service docker restart
	systemctl restart kube-apiserver.service
	systemctl restart kube-controller-manager.service
	systemctl restart kube-scheduler.service

node节点：

systemctl enable flanneld.service 
systemctl start flanneld.service 
service docker restart
systemctl restart kubelet.service
systemctl restart kube-proxy.service