kubernetes 二进制安装

环境说明：
```shell
CentOS Linux release 7.2.1511 (Core)
192.168.50.218 master
192.168.50.219 node1
192.168.50.220 node2
配置为8C16G
```

## 1.系统基础优化
```shell
#防火墙
systemctl status iptables
systemctl status firewalld
systemctl stop firewalld
systemctl disable firewalld
systemctl status firewalld
#selinux 关闭
sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/config
setenforce 0
#打开文件数
sed -i '/# End of file/i\*\t\t-\tnofile\t\t65535' /etc/security/limits.conf
cat /etc/security/limits.conf
ulimit -HSn 65535
ulimit -n
#内核参数调整
echo 'net.ipv4.ip_forward = 1' > /etc/sysctl.conf
echo 'net.ipv4.tcp_timestamps = 1' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_tw_recycle = 1' >> /etc/sysctl.conf
echo 'net.ipv4.tcp_fin_timeout = 30' >> /etc/sysctl.conf
sysctl -p
#配置yum源为aliyun
cd /etc/yum.repos.d
mv CentOS-Base.repo CentOS-Base.repo.bak
rpm -ivh http://source.zhaolibin.com/scripts/wget-1.14-10.el7_0.1.x86_64.rpm
wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo
wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo
yum clean all
yum makecache
#修改时区并同步时间
cat /usr/share/zoneinfo/Asia/Shanghai > /etc/localtime
yum install ntpdate -y
echo "*/5 * * * * /usr/sbin/ntpdate 0.asia.pool.ntp.org" >> /var/spool/cron/root
yum -y install conntrack net-tools
```

```shell
下载 k8s_v1.10.0_install.tar.gz 安装包到/opt目录下
链接：https://pan.baidu.com/s/1pJrhBfMIrYjoqzUHen_ZqQ 密码：y0nc
```

设置三台机器hosts（三台机器都配置）
```shell
192.168.50.218 master
192.168.50.219 node1
192.168.50.220 node2
```

分别配置hostname

配置免密登陆
```shell
#只在master执行
ssh-keygen 一直回车
cat /root/.ssh/id_rsa.pub > authorized_keys
scp -r /root/.ssh node1:/root/
scp -r /root/.ssh node2:/root/
```

组件版本部署方式安装目录或访问入口
```shell
etcd3.3.2二进制/usr/local/kubernetes/bin/etcd
docker18.03.0-ce二进制/usr/bin/docker
flannel0.10.0二进制/usr/local/kubernetes/bin/flanneld
kubernetes1.10.0二进制/usr/local/kubernetes/bin kube-apiserver、kube-controller-manager、kubectl、kube-proxy、kube-scheduler
```

Node IP：192.168.50.219/220
组件版本部署方式安装目录或访问入口
```shell
etcd3.3.2二进制/usr/local/kubernetes/bin/etcd
docker18.03.0-ce二进制/usr/bin/docker
flannel0.10.0二进制/usr/local/kubernetes/bin/flanneld
kubernetes1.10.0二进制/usr/local/kubernetes/bin Kubectl、kubelet、kube-proxy
```

## 2.部署ETCD(三台机器都操作)

```shell
cd /opt/
tar -zxvf k8s_v1.10.0_install.tar.gz
```

修改/opt/k8s_v1.10.0_install/etcd/install_etcd.sh脚本中ifconfig获取本机ip地址的命令，按照实际情况进行修改以正确过滤获得主机IP。（此处改为eth0)

```shell
ETCD_LISTEN_IP=`ifconfig eth0 | grep 'inet ' | awk '{ print $2}'`
```

在三台机器分别执行

```shell
#master
cd /opt/k8s_v1.10.0_install/etcd
./install_etcd.sh etcd01 etcd01=http://192.168.50.218:2380,etcd02=http://192.168.50.219:2380,etcd03=http://192.168.50.220:2380

#node1
cd /opt/k8s_v1.10.0_install/etcd
./install_etcd.sh etcd02 etcd01=http://192.168.50.218:2380,etcd02=http://192.168.50.219:2380,etcd03=http://192.168.50.220:2380

cd /opt/k8s_v1.10.0_install/etcd
./install_etcd.sh etcd03 etcd01=http://192.168.50.218:2380,etcd02=http://192.168.50.219:2380,etcd03=http://192.168.50.220:2380
```

检测是否搭建成功
```shell
vim /etc/profile
export K8S_HOME=/usr/local/kubernetes
export PATH=$PATH:$K8S_HOME/bin
source /etc/profile
etcdctl member list

[root@localhost etcd]# etcdctl member list
3391fd63f6e21a41: name=etcd02 peerURLs=http://node1:2380 clientURLs=http://192.168.50.219:2379 isLeader=false
41122860660738be: name=etcd01 peerURLs=http://master:2380 clientURLs=http://192.168.50.218:2379 isLeader=true
fcb34b889f767170: name=etcd03 peerURLs=http://node2:2380 clientURLs=http://192.168.50.220:2379 isLeader=false
```

##安装Flannel
Flannel需要在所有主机上安装。
编辑install_flannel.sh脚本设置正确的网卡接口及etcd键值
```shell
FLANNEL_NET='{"Network":"172.18.0.0/16", "SubnetMin": "172.18.1.0", "SubnetMax": "172.18.254.0", "Backend": {"Type": "host-gw"}}'
IFACE="eth0"
```
```shell
#三台机器都执行
cd /opt/k8s_v1.10.0_install/flannel/
./install_flannel.sh http://master:2379,http://node1:2379,http://node2:2379
```

## 部署Docker
```shell
cd /opt/k8s_v1.10.0_install/docker
./install-docker.sh docker-18.03.0-ce.tgz
```

##部署Kubernetes

```shell
#master
cd /opt/k8s_v1.10.0_install/kubernetes/master
./install_k8s_master.sh 192.168.50.218 http://master:2379,http://node1:2379,http://node2:2379

#node1、node2
cd /opt/k8s_v1.10.0_install/kubernetes/node/
./install_k8s_node.sh master
```
确认状态
```shell
[root@master master]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
node1 Ready <none> 5m v1.10.0
node2 Ready <none> 5m v1.10.0
[root@master master]# kubectl get cs
NAME STATUS MESSAGE ERROR
scheduler Healthy ok
controller-manager Healthy ok
etcd-0 Healthy {"health":"true"}
etcd-1 Healthy {"health":"true"}
etcd-2 Healthy {"health":"true"}
```

##部署Busybox容器

```shell
cd /opt/k8s_v1.10.0_install/kubernetes/images
docker load -i gcr.io~google_containers~pause-amd64~3.0.tar.gz
docker load -i busybox.tar
docker load -i k8s-dns-dnsmasq-nanny-amd64_v1.14.7.tar
docker load -i k8s-dns-kube-dns-amd64_1.14.7.tar
docker load -i k8s-dns-sidecar-amd64_1.14.7.tar
docker load -i kubernetes-dashboard-amd64_v1.8.3.tar
```