我正在尝试允许从网络命名空间连接互联网。我尝试使用docker0基于以下规则的全局命名空间中运行的网桥执行此操作：这次谈话。如果我尝试在新的命名空间内 ping，我会收到Destination Host Unreachable一些配置不正确的信息。我对命名空间非常陌生，因此任何帮助我都非常感谢。
全局命名空间详细信息
# ifconfig -a
docker0 Link encap:Ethernet HWaddr 02:42:99:e7:76:59
inet addr:172.17.0.1 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::42:99ff:fee7:7659/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:215 errors:0 dropped:0 overruns:0 frame:0
TX packets:3 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:6476 (6.4 KB) TX bytes:258 (258.0 B)
eth0 Link encap:Ethernet HWaddr 06:b1:78:7b:d4:73
inet addr:10.178.155.11 Bcast:10.178.155.63 Mask:255.255.255.192
inet6 addr: fe80::4b1:78ff:fe7b:d473/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:9001 Metric:1
RX packets:53259 errors:0 dropped:0 overruns:0 frame:0
TX packets:8750 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:68143404 (68.1 MB) TX bytes:2471391 (2.4 MB)
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:164 errors:0 dropped:0 overruns:0 frame:0
TX packets:164 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:12104 (12.1 KB) TX bytes:12104 (12.1 KB)
veth0 Link encap:Ethernet HWaddr 1e:cb:a7:de:42:20
inet addr:172.17.42.3 Bcast:0.0.0.0 Mask:255.255.0.0
inet6 addr: fe80::1ccb:a7ff:fede:4220/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:212 errors:0 dropped:0 overruns:0 frame:0
TX packets:8 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:9216 (9.2 KB) TX bytes:648 (648.0 B)
# route -n
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 10.178.155.1 0.0.0.0 UG 0 0 0 eth0
10.178.155.0 0.0.0.0 255.255.255.192 U 0 0 0 eth0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 veth0
自定义命名空间详细信息
# ifconfig -a
eth0 Link encap:Ethernet HWaddr ea:df:85:61:3d:76
inet addr:172.17.1.1 Bcast:0.0.0.0 Mask:255.255.255.255
inet6 addr: fe80::e8df:85ff:fe61:3d76/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:8 errors:0 dropped:0 overruns:0 frame:0
TX packets:212 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:648 (648.0 B) TX bytes:9216 (9.2 KB)
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:247 errors:0 dropped:0 overruns:0 frame:0
TX packets:247 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:25620 (25.6 KB) TX bytes:25620 (25.6 KB)
# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
12: eth0@if13: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
link/ether ea:df:85:61:3d:76 brd ff:ff:ff:ff:ff:ff link-netnsid 0
inet 172.17.1.1/32 scope global eth0
valid_lft forever preferred_lft forever
inet6 fe80::e8df:85ff:fe61:3d76/64 scope link
valid_lft forever preferred_lft forever
# brctl show
bridge name bridge id STP enabled interfaces
docker0 8000.024299e77659 no veth0