1、bractl show:显示桥接。 docker0网桥,网桥上会有接口,docker中的容器可以通过网桥进行网络访问。
[root@tcy1 tcy]# brctl show
bridge name bridge id STP enabled interfaces
docker0 8000.56847afe9799 no veth0ce12ad
pan0 8000.000000000000 no
2、测试容器是否是连上网:
1、在容器f3e81c343c1中ping 百度
若出现:
root@ef3e81c343c1:/# ping baidu.com
-bash: ping: command not found
解决:
①apt-get update:这个命令的作用是:同步 /etc/apt/sources.list 和 /etc/apt/sources.list.d 中列出的源的索引,这样才能获取到最新的软件包。
②apt-get install iputils-ping:安装软件包
可以ping了:
root@ef3e81c343c1:/# ping baidu.com
PING baidu.com (220.181.57.216) 56(84) bytes of data.
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=1 ttl=127 time=49.1 ms
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=2 ttl=127 time=69.6 ms
64 bytes from 220.181.57.216 (220.181.57.216): icmp_seq=3 ttl=127 time=148 ms
3、容器内查看ip
ifconfig: 如出现 -bash: ifonfig: command not found
解决:1、apt-get update 2、apt-get install net-tools
可以了:ifconfig,ip为172.17.0.1root@ef3e81c343c1:/# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 0.0.0.0
inet6 fe80::42:acff:fe11:1 prefixlen 64 scopeid 0x20<link>
ether 02:42:ac:11:00:01 txqueuelen 0 (Ethernet)
RX packets 8712 bytes 11485442 (10.9 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 3810 bytes 239071 (233.4 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 0 (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
4、ip ro li:查看路由
若出现:-bash: ip: command not found 解决:apt-get install iproute
root@ef3e81c343c1:/# ip ro li
default via 172.17.42.1 dev eth0
172.17.0.0/16 dev eth0 proto kernel scope link src 172.17.0.1
网关是通过:172.17.42.1这个网桥出去的,这个网桥是docker0这个网桥。
退出该容器:exit,之后ifconfig,确实是172.17.42.1。
[root@tcy1 tcy]# ifconfig
docker0 Link encap:Ethernet HWaddr 56:84:7A:FE:97:99
inet addr:172.17.42.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::5484:7aff:fefe:9799/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:4096 errors:0 dropped:0 overruns:0 frame:0
TX packets:9425 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:198989 (194.3 KiB) TX bytes:12499767 (11.9 MiB)
eth0 Link encap:Ethernet HWaddr 00:0C:29:A1:24:9E
inet addr:192.168.163.132 Bcast:192.168.163.255 Mask:255.255.255.0
inet6 addr: fe80::20c:29ff:fea1:249e/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:17904 errors:0 dropped:0 overruns:0 frame:0
TX packets:9912 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:13235402 (12.6 MiB) TX bytes:1195114 (1.1 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:66 errors:0 dropped:0 overruns:0 frame:0
TX packets:66 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:5620 (5.4 KiB) TX bytes:5620 (5.4 KiB)