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              准备好服务器和服务器资源

ip

hostname	ip	资源 （2核2G也可以）
k8s-master	192.168.37.118	4核 4G 40G硬盘
k8s-node1	192.168.37.119	2核 2G 20G硬盘
k8s-node2	192.168.37.120	2核 2G 20G硬盘

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初始操作三台同时执行 

  1、关闭防火墙

[root@localhost ~]# systemctl stop firewalld
[root@localhost ~]# systemctl disable firewalld
Removed symlink /etc/systemd/system/multi-user.target.wants/firewalld.service.
Removed symlink /etc/systemd/system/dbus-org.fedoraproject.FirewallD1.service.
[root@localhost ~]# systemctl status firewalld
● firewalld.service - firewalld - dynamic firewall daemonLoaded: loaded (/usr/lib/systemd/system/firewalld.service; disabled; vendor preset: enabled)Active: inactive (dead)Docs: man:firewalld(1)Jul 18 16:47:47 localhost.localdomain systemd[1]: Starting firewalld - dynam...
Jul 18 16:47:48 localhost.localdomain systemd[1]: Started firewalld - dynami...
Jul 18 16:47:48 localhost.localdomain firewalld[824]: WARNING: AllowZoneDrif...
Jul 18 17:02:28 localhost.localdomain systemd[1]: Stopping firewalld - dynam...
Jul 18 17:02:28 localhost.localdomain systemd[1]: Stopped firewalld - dynami...
Hint: Some lines were ellipsized, use -l to show in full.
[root@localhost ~]#

2、关闭 selinux

sed -i 's/enforcing/disable/' /etc/selinux/config
[root@localhost ~]# cat /etc/selinux/config |grep disable
#     disable - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of disable.
#     disabled - No SELinux policy is loaded.
SELINUX=disable

3、关闭swap分区 

       sed -ri 's/.*swap.*/#&/' /etc/fstab

4、修改服务器名称

  hostnamectl set-hostname <hostname>

添加hosts

[root@localhost ~]# hostnamectl set-hostname k8s-master
[root@localhost ~]# hostname
k8s-master
[root@localhost ~]# cat >> /etc/hosts
hosts        hosts.allow  hosts.deny
[root@localhost ~]# cat >> /etc/hosts <<EOF
> 192.168.37.118 k8s-master
> 192.168.37.119 k8s-node1
> 192.168.37.120 k8s-node2
> EOF
[root@localhost ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.37.118 k8s-master
192.168.37.119 k8s-node1
192.168.37.120 k8s-node2

5、同步时间

   yum install ntpdate -y

      ntpdate time.windows.com
       18 Jul 17:24:47 ntpdate[17423]: adjust time server 52.231.114.183 offset 0.015404 sec

6、IPv4流量传递到iptables的链

[root@localhost ~]# cat > /etc/sysctl.conf/k8s.conf << EOF
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOFcat /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
[root@k8s-master ~]# sysctl --system     执行生效
* Applying /usr/lib/sysctl.d/00-system.conf ...
* Applying /usr/lib/sysctl.d/10-default-yama-scope.conf ...

7、重启服务器

swap生效 即可
[root@k8s-master ~]# free -m
              total        used        free      shared  buff/cache   available
Mem:           3770         266        3327          11         176        3293
Swap:             0           0           0

第二章 k8s环境部署

http://t.csdn.cn/H27aW