设置centos系统的ip地址Gateway,DNS
系统版本为:
[root@localhost ~]# uname -a
Linux localhost.localdomain 3.10.0-514.el7.x86_64 #1 SMP Tue Nov 22 16:42:41 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux
默认配置如下，其中系统有两块网卡ens160和ens192，一个回路设备lo，其中一块网卡ens160分配到的地址为10.10.51.91
[root@localhost ~]# ifconfig
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.51.91 netmask 255.255.255.0 broadcast 10.10.51.255
inet6 fe80::d67a:4123:99b1:6f29 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:53:aa:cd txqueuelen 1000 (Ethernet)
RX packets 510 bytes 48449 (47.3 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 299 bytes 34005 (33.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::5923:f260:3272:ea23 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:53:aa:d7 txqueuelen 1000 (Ethernet)
RX packets 20 bytes 2722 (2.6 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 205 bytes 36318 (35.4 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
修改ens160为固定地址10.10.51.214
临时设置
[root@localhost ~]# ifconfig ens160 10.10.51.214 netmask 255.255.255.0
永久设置
vi /etc/sysconfig/network-scripts/ifcfg-ens160
TYPE=Ethernet
BOOTPROTO=static
IPADDR=10.10.51.214
PREFIX=24
GATEWAY=10.10.51.1
DNS1=10.10.51.1
DNS2=8.8.8.8
DEFROUTE=yes
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=no
IPV6INIT=no
IPV6_AUTOCONF=yes
IPV6_DEFROUTE=yes
IPV6_PEERDNS=yes
IPV6_PEERROUTES=yes
IPV6_FAILURE_FATAL=no
IPV6_ADDR_GEN_MODE=stable-privacy
NAME=ens160
UUID=ac5c3430-a9bf-4528-aba5-ded44c070e70
DEVICE=ens160
ONBOOT=yes
新增IPADDR网络地址，PREFIX掩码长度，GATEWAY网关地址 DNS地址，设置结束后，reboot重启看看效果，或者重启网卡 systemctl restart network
[root@localhost ~]# ifconfig
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 10.10.51.214 netmask 255.255.255.0 broadcast 10.10.51.255
inet6 fe80::20c:29ff:fe53:aacd prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:53:aa:cd txqueuelen 1000 (Ethernet)
RX packets 76 bytes 7685 (7.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 87 bytes 10121 (9.8 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens192: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::5923:f260:3272:ea23 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:53:aa:d7 txqueuelen 1000 (Ethernet)
RX packets 2 bytes 120 (120.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 22 bytes 3300 (3.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1 (Local Loopback)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 0 bytes 0 (0.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
修改centos的hostname
临时修改方式，重启后无效
hostname k8s-master
永久修改方式，重启后也生效
hostnamectl set-hostname centos77.magedu.com
在/etc/hosts文件加上记录
vim /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.10.51.215 k8s-node1
在主机上禁用SELinux
让容器可以读取主机文件系统
setenforce 0
永久修改方式
sudo vi /etc/selinux/config
#SELINUX修改为disabled
SELINUX=disabled
关闭防火墙
#停止firewall
systemctl stop firewalld.service
#禁止firewall开机启动
systemctl disable firewalld.service
centos 设置yum源为aliyun
curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo