Docker：容器的四种网络类型 [十三]
一、None类型
简介：不为容器配置任何网络功能，--net=none
1、创建容器
docker run -it --network none busubox:latest
2、功能测试
[root@luoahong ~]# docker run -it --network none busybox:latest
/ # ifconfig
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) / # free -m
total used free shared buff/cache available
Mem: 1984 730 125 0 1128 1135
Swap: 2047 0 2047
/ # ping www.baidu.com
ping: bad address 'www.baidu.com'
/ # ping ls
ping: bad address 'ls'
测试小结：
1、网卡只有一块io
2、只能执行本地命令，无法使用ping,ls
3、网络类型查看
[root@luoahong ~]# docker inspect 148da827024a
[
{
"Id": "148da827024a7e250d58684fedbd7467b1ec1950aa2f87f8f4c64f0094af905c",
"Created": "2019-01-18T07:34:16.468365453Z",
"Path": "sh",
"Args": [],
"State": {
..........
"MacAddress": "",
"Networks": {
"none": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "03062097926d6dfd6b1296295154c960f7e7989a106f7a1cb318c1040e4fa327",
"EndpointID": "cfb8a5eb16445bd8bb32708848a481c4638b86927e08fef4151e987e440869ec",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": null
}
}
}
}
]
二、Container
简介：与另一个运行中的容器共享Network Namespace，--net=container:containerID
docker run -it --network container:name centos:6.9
netstat -lntup #是因为另外一个容器使用了80端口 共享网络端口不能冲突
ps -ef
docker ps -a
docker inspect ID #信息全是空 ping 172.168.0.2 yum install tcpdump -y
tcpdump -i eth0 icmp
共享网络端口不能冲突
三、Host
简介：与主机共享Network Namespace，--net=host
1、创建容器
[root@luoahong ~]# docker run -it --network host centos:6.9
2、功能测试
1、容器命令测试
[root@luoahong /]# netstat -lntup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN -
tcp 0 0 :::22 :::* LISTEN -
tcp 0 0 :::32769 :::* LISTEN -
tcp 0 0 :::32770 :::* LISTEN -
tcp 0 0 :::32771 :::* LISTEN -
udp 0 0 0.0.0.0:68 0.0.0.0:* -
udp 0 0 0.0.0.0:3255 0.0.0.0:* -
udp 0 0 127.0.0.1:323 0.0.0.0:* -
udp 0 0 :::28221 :::* -
udp 0 0 ::1:323 :::* -
[root@luoahong /]# hostname
luoahong
[root@luoahong /]# ifconfig
br-ad2616372f01 Link encap:Ethernet HWaddr 02:42:14:4D:EC:B9
inet addr:172.18.0.1 Bcast:172.18.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:14ff:fe4d:ecb9/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3772 errors:0 dropped:0 overruns:0 frame:0
TX packets:4439 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2284090 (2.1 MiB) TX bytes:4238472 (4.0 MiB) docker0 Link encap:Ethernet HWaddr 02:42:F7:2F:D6:20
inet addr:172.17.0.1 Bcast:172.17.255.255 Mask:255.255.0.0
inet6 addr: fe80::42:f7ff:fe2f:d620/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:648 (648.0 b) eth0 Link encap:Ethernet HWaddr 00:0C:29:E7:B9:46
inet addr:192.168.231.136 Bcast:192.168.231.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fee7:b946/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:203307 errors:0 dropped:0 overruns:0 frame:0
TX packets:88428 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:289713694 (276.2 MiB) TX bytes:7698693 (7.3 MiB) 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:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 b) TX bytes:0 (0.0 b) vethac33a3b Link encap:Ethernet HWaddr F2:9B:3D:42:9E:B4
inet6 addr: fe80::f09b:3dff:fe42:9eb4/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1871 errors:0 dropped:0 overruns:0 frame:0
TX packets:2128 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1161525 (1.1 MiB) TX bytes:1283465 (1.2 MiB) vethc0fae95 Link encap:Ethernet HWaddr EE:A2:D7:DD:0E:4C
inet6 addr: fe80::eca2:d7ff:fedd:e4c/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:21 errors:0 dropped:0 overruns:0 frame:0
TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:26497 (25.8 KiB) TX bytes:3284 (3.2 KiB) veth43c45fd Link encap:Ethernet HWaddr FA:06:6C:F7:4E:94
inet6 addr: fe80::f806:6cff:fef7:4e94/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:16 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 b) TX bytes:1296 (1.2 KiB) veth68aaa11 Link encap:Ethernet HWaddr 3A:A1:00:65:05:AC
inet6 addr: fe80::38a1:ff:fe65:5ac/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:23 errors:0 dropped:0 overruns:0 frame:0
TX packets:37 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:26610 (25.9 KiB) TX bytes:3415 (3.3 KiB) vethc477df7 Link encap:Ethernet HWaddr AA:CF:39:D8:B3:0E
inet6 addr: fe80::a8cf:39ff:fed8:b30e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:3772 errors:0 dropped:0 overruns:0 frame:0
TX packets:4439 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2284090 (2.1 MiB) TX bytes:4238472 (4.0 MiB)
2、宿主机命令测试
[root@luoahong ~]# netstat -lntup
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 1166/sshd
tcp6 0 0 :::22 :::* LISTEN 1166/sshd
tcp6 0 0 :::32769 :::* LISTEN 2629/docker-proxy
tcp6 0 0 :::32770 :::* LISTEN 2871/docker-proxy
tcp6 0 0 :::32771 :::* LISTEN 2884/docker-proxy
udp 0 0 0.0.0.0:68 0.0.0.0:* 1110/dhclient
udp 0 0 0.0.0.0:3255 0.0.0.0:* 1110/dhclient
udp 0 0 127.0.0.1:323 0.0.0.0:* 648/chronyd
udp6 0 0 :::28221 :::* 1110/dhclient
udp6 0 0 ::1:323 :::* 648/chronyd
[root@luoahong ~]# hostname
luoahong
[root@luoahong ~]# ifconfig
br-ad2616372f01: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255
inet6 fe80::42:14ff:fe4d:ecb9 prefixlen 64 scopeid 0x20<link>
ether 02:42:14:4d:ec:b9 txqueuelen 0 (Ethernet)
RX packets 3772 bytes 2284090 (2.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4439 bytes 4238472 (4.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
inet6 fe80::42:f7ff:fe2f:d620 prefixlen 64 scopeid 0x20<link>
ether 02:42:f7:2f:d6:20 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 8 bytes 648 (648.0 B)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.231.136 netmask 255.255.255.0 broadcast 192.168.231.255
inet6 fe80::20c:29ff:fee7:b946 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:e7:b9:46 txqueuelen 1000 (Ethernet)
RX packets 203331 bytes 289715676 (276.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 88441 bytes 7705439 (7.3 MiB)
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 veth43c45fd: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::f806:6cff:fef7:4e94 prefixlen 64 scopeid 0x20<link>
ether fa:06:6c:f7:4e:94 txqueuelen 0 (Ethernet)
RX packets 0 bytes 0 (0.0 B)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 16 bytes 1296 (1.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 veth68aaa11: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::38a1:ff:fe65:5ac prefixlen 64 scopeid 0x20<link>
ether 3a:a1:00:65:05:ac txqueuelen 0 (Ethernet)
RX packets 23 bytes 26610 (25.9 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 37 bytes 3415 (3.3 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vethac33a3b: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::f09b:3dff:fe42:9eb4 prefixlen 64 scopeid 0x20<link>
ether f2:9b:3d:42:9e:b4 txqueuelen 0 (Ethernet)
RX packets 1871 bytes 1161525 (1.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 2128 bytes 1283465 (1.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vethc0fae95: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::eca2:d7ff:fedd:e4c prefixlen 64 scopeid 0x20<link>
ether ee:a2:d7:dd:0e:4c txqueuelen 0 (Ethernet)
RX packets 21 bytes 26497 (25.8 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 34 bytes 3284 (3.2 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0 vethc477df7: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::a8cf:39ff:fed8:b30e prefixlen 64 scopeid 0x20<link>
ether aa:cf:39:d8:b3:0e txqueuelen 0 (Ethernet)
RX packets 3772 bytes 2284090 (2.1 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 4439 bytes 4238472 (4.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
测试小结：
1、主机名和宿主机是一样
2、netstat -lntup的结果也是一样
3、ifconfig也是一样，几乎和宿主机分辨不清楚
4、但是容器看不到主机的程序
3、网络类型查看
"MacAddress": "",
"Networks": {
"host": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "30b37ec09ff25e54c6b8208779335bfe7b01729fc830db0c2c70434ca6817eb2",
"EndpointID": "94f41095acd2ba3d85210cc3667fc6e4324d3cacb9c1243a0747b4e46774a811",
"Gateway": "",
"IPAddress": "",
"IPPrefixLen": 0,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "",
"DriverOpts": null
}
}
}
}
]
四、Bridge
简介：Docker设计的NAT网络模型
1、创建容器
docker run -d httpd:latest
2、功能测试
[root@luoahong ~]# ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
ether 02:42:1a:8d:3d:28 txqueuelen 0 (Ethernet)
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 eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.228.135 netmask 255.255.255.0 broadcast 192.168.228.255
inet6 fe80::20c:29ff:fe66:d93a prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:66:d9:3a txqueuelen 1000 (Ethernet)
RX packets 235 bytes 25094 (24.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 206 bytes 28905 (28.2 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
测试小结：docker0就是nat网络，不用过多解释
3、网络类型查看
"Networks": {
"bridge": {
"IPAMConfig": null,
"Links": null,
"Aliases": null,
"NetworkID": "d766f2526542a828e4b6e302fcc592a1a945bce83df236b9f24efbbea3eff4f4",
"EndpointID": "b2f80a78210a384f6ec5a8acc7f502d55f0858470f04e279a091aadc1912e82d",
"Gateway": "172.17.0.1",
"IPAddress": "172.17.0.2",
"IPPrefixLen": 16,
"IPv6Gateway": "",
"GlobalIPv6Address": "",
"GlobalIPv6PrefixLen": 0,
"MacAddress": "02:42:ac:11:00:02",
"DriverOpts": null
}
}
}
}
]
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