kubeadm 安装k8s 1.14.2（1.基础环境）

基础环境相关配置

1.服务器相关信息

IP地址	角色	操作系统
172.17.240.73	master1、etcd	CentOS 7.6.1810
172.17.240.74	master2、etcd	CentOS 7.6.1810
172.17.240.75	node1、ingress-nginx-controller	CentOS 7.6.1810
172.17.240.76	node2、ingress-nginx-controller	CentOS 7.6.1810
172.17.240.68	nginx1、Keepalived	CentOS 7.6.1810
172.17.240.69	nginx2、Keepalived	CentOS 7.6.1810
172.17.240.70	Keepalived VIP	CentOS 7.6.1810

2.添加hosts文件

172.17.240.73 master1
172.17.240.74 master2
172.17.240.75 node1
172.17.240.76 node2
172.17.240.68 nginx1
172.17.240.69 nginx2

3.关闭firewalld、selinux

systemctl stop firewalld
systemctl disable firewalld
setenforce 0
sed -i "s/SELINUX=enforcing/SELINUX=disabled/g" /etc/selinux/config

4.关闭swap

swapoff -a
yes | cp /etc/fstab /etc/fstab_bak
cat /etc/fstab_bak |grep -v swap > /etc/fstab

5.添加内核参数

echo """
vm.swappiness = 0
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_nonlocal_bind = 1
net.ipv4.ip_forward = 1
""" > /etc/sysctl.d/k8s.conf

执行命令使修改生效

modprobe br_netfilter
sysctl -p /etc/sysctl.d/k8s.conf

6.安装基础软件包

yum -y install epel-release vim tree ntpdate wget  net-tools telnet

7.同步时间

ntpdate -u ntp.api.bz