1 网卡eth0配置多个ip地址
一个网卡多个ip，如何一个网卡配置多个ip
方法1：ifconfig eth0:0 10.0.0.101/24 up （ifconfig 方式设置ip叫做别名IP）
[root@web01 conf]# ifconfig eth0:0 10.0.0.101/24 up [root@web01 conf]# ifconfig eth0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42 inet addr:10.0.0.8 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe79:7342/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2694 errors:0 dropped:0 overruns:0 frame:0 TX packets:1959 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:243597 (237.8 KiB) TX bytes:229882 (224.4 KiB) eth0:0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42 inet addr:10.0.0.101 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth1 Link encap:Ethernet HWaddr 00:0C:29:79:73:4C inet addr:172.16.1.8 Bcast:172.16.1.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe79:734c/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:154 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 b) TX bytes:9398 (9.1 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:129 errors:0 dropped:0 overruns:0 frame:0 TX packets:129 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11352 (11.0 KiB) TX bytes:11352 (11.0 KiB)
在管理机m01上面ping是否可以ping通
[root@m01 ~]# ping 10.0.0.101 -c4 PING 10.0.0.101 (10.0.0.101) 56(84) bytes of data. 64 bytes from 10.0.0.101: icmp_seq=1 ttl=64 time=0.421 ms 64 bytes from 10.0.0.101: icmp_seq=2 ttl=64 time=0.416 ms 64 bytes from 10.0.0.101: icmp_seq=3 ttl=64 time=0.384 ms 64 bytes from 10.0.0.101: icmp_seq=4 ttl=64 time=0.397 ms --- 10.0.0.101 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3000ms rtt min/avg/max/mdev = 0.384/0.404/0.421/0.025 ms
方法2： 辅助IP设置ip addr add 10.0.0.102/24 dev eth0 label eth0:1（不带表情label ifconifg看不了）
[root@web01 conf]# ip addr add 10.0.0.102/24 dev eth0 label eth0:1 [root@web01 conf]# ifconfig eth0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42 inet addr:10.0.0.8 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe79:7342/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:2920 errors:0 dropped:0 overruns:0 frame:0 TX packets:2103 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:262933 (256.7 KiB) TX bytes:247258 (241.4 KiB) eth0:0 Link encap:Ethernet HWaddr 00:0C:29:79:73:42 inet addr:10.0.0.101 Bcast:10.0.0.255 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth0:1 Link encap:Ethernet HWaddr 00:0C:29:79:73:42 inet addr:10.0.0.102 Bcast:0.0.0.0 Mask:255.255.255.0 UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 eth1 Link encap:Ethernet HWaddr 00:0C:29:79:73:4C inet addr:172.16.1.8 Bcast:172.16.1.255 Mask:255.255.255.0 inet6 addr: fe80::20c:29ff:fe79:734c/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:6 errors:0 dropped:0 overruns:0 frame:0 TX packets:154 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:360 (360.0 b) TX bytes:9398 (9.1 KiB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:129 errors:0 dropped:0 overruns:0 frame:0 TX packets:129 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:11352 (11.0 KiB) TX bytes:11352 (11.0 KiB)
用ip add可以看出来ip的别名和辅助ip区别
[root@web01 conf]# ip add 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo inet6 ::1/128 scope host valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:79:73:42 brd ff:ff:ff:ff:ff:ff inet 10.0.0.8/24 brd 10.0.0.255 scope global eth0 inet 10.0.0.101/24 brd 10.0.0.255 scope global secondary eth0:0 inet 10.0.0.102/24 scope global secondary eth0:1 inet6 fe80::20c:29ff:fe79:7342/64 scope link valid_lft forever preferred_lft forever 3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000 link/ether 00:0c:29:79:73:4c brd ff:ff:ff:ff:ff:ff inet 172.16.1.8/24 brd 172.16.1.255 scope global eth1 inet6 fe80::20c:29ff:fe79:734c/64 scope link valid_lft forever preferred_lft forever
到管理机m01查看辅助ip地址是否通
[root@m01 ~]# ping -c4 10.0.0.102 PING 10.0.0.102 (10.0.0.102) 56(84) bytes of data. 64 bytes from 10.0.0.102: icmp_seq=1 ttl=64 time=1.65 ms 64 bytes from 10.0.0.102: icmp_seq=2 ttl=64 time=0.330 ms 64 bytes from 10.0.0.102: icmp_seq=3 ttl=64 time=0.379 ms 64 bytes from 10.0.0.102: icmp_seq=4 ttl=64 time=0.318 ms --- 10.0.0.102 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3003ms rtt min/avg/max/mdev = 0.318/0.670/1.655/0.569 ms
2 修改nginx配置文件
[root@web01 conf]# cat nginx.conf
worker_processes 1;
events {
worker_connections 1024;
}
http {
include mime.types;
default_type application/octet-stream;
sendfile on;
keepalive_timeout 65;
server {
listen 10.0.0.8:80;
server_name www.etiantian.org;
location / {
root html/www;
index index.html index.htm;
}
}
server {
listen 10.0.0.101:80;
server_name www.etiantian.org;
location / {
root html/bbs;
index index.html index.htm;
}
}
server {
listen 10.0.0.102:80;
server_name www.etiantian.org;
location / {
root html/blog;
index index.html index.htm;
}
}
}
[root@web01 conf]# /application/nginx/sbin/nginx -t
nginx: the configuration file /application/nginx-1.6.3//conf/nginx.conf syntax is ok
nginx: configuration file /application/nginx-1.6.3//conf/nginx.conf test is successful
[root@web01 conf]# /application/nginx/sbin/nginx -s reload2.1 验证，在m01管理机上面验证
[root@m01 ~]# curl 10.0.0.8 www [root@m01 ~]# curl 10.0.0.101 www
发现101是错误的，原因：有时候平滑优雅重启不生效。在web01机器上面关闭nginx服务再开启nginx服务。
[root@web01 conf]# /application/nginx/sbin/nginx -s stop [root@web01 conf]# /application/nginx/sbin/nginx
继续在管理机m01上验证
[root@m01 ~]# curl 10.0.0.8 www [root@m01 ~]# curl 10.0.0.101 bbs [root@m01 ~]# curl 10.0.0.102 blog
上面已验证成功。
总结：
配置ip (ifconfig是配置别名ip地址，ip addr是配置辅助ip地址)
ifconfig eth0:0 10.0.0.101/24 up
ip addr add 10.0.0.102/24 dev eth0 label eth0:1
删除ip
ifconfig eth0:0 down
ip addr del 10.0.0.102/24 dev eth0 label eth0:1
