Linux下Docker容器访问宿主机网络。
0.背景
docker启动时,如果创建了自定义的docker网络:
将容器run在该网络中时,容器访问的localhost不是宿主机的localhost.
1.解决
1.1 启动时该为host网络模式启动
--network host示例
# host网络模式,无需映射端口. (\表示换行)
docker run -d --name konga --network host\
-e "NODE_ENV=production" \
-e "DB_ADAPTER=mysql" \
-e "DB_URI=mysql://root:123456@172.18.0.1:5432/konga" \
pantsel/konga1.2 修改localhost为docker网络的ip
1.2.1 查看docker下的网络
# 查看docker网络信息
docker network ls
# 控制台显示
# DRIVER参数代表网络类型.
NETWORK ID NAME DRIVER SCOPE
e34f9fddb6bd bridge bridge local
e3e320be538b host host local
8a1dd9a77350 none null local
e01f2aaa9bf5 test_network bridge local
cbb7bbd9dd54 test_network2 bridge local1.2.2 查看指定网络的信息
- 查看docker0
Docker启动的时候会在主机上自动创建一个docker0网络,实际上是一个Linux网桥. 如果在docker run的时候,没有指定网络模式时. 此时都会挂载到docker0网桥上,这样容器就可以和主机甚至是其他容器之间通讯了.
# 查看docker0的ip信息
ip addr show docker0
# 控制台显示
3: docker0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:8c:08:a0:f9 brd ff:ff:ff:ff:ff:ff
inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
valid_lft forever preferred_lft forever
inet6 fe80::42:8cff:fe08:a0f9/64 scope link
valid_lft forever preferred_lft forever- 查看test_network
# docker中查看test_network网络的信息
docker network ls | grep test
# 控制台显示
e01f2aaa9bf5 test_network bridge local
cbb7bbd9dd54 test_network2 bridge local
# 其实就是NETWORKID加上了个br
ip addr show br-e01f2aaa9bf5
# 控制台显示
16: br-e01f2aaa9bf5: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default
link/ether 02:42:44:31:54:fc brd ff:ff:ff:ff:ff:ff
inet 172.18.0.1/16 brd 172.18.255.255 scope global br-e01f2aaa9bf5
valid_lft forever preferred_lft forever1.2.3 查看所有网络信息
# 查看所有网络信息
ifconfig
# 控制台显示
br-cbb7bbd9dd54: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.19.0.1 netmask 255.255.0.0 broadcast 172.19.255.255
ether 02:42:aa:cb:98:a6 txqueuelen 0 (Ethernet)
RX packets 9922240 bytes 4198752081 (3.9 GiB)
RX errors 0 dropped 404 overruns 0 frame 0
TX packets 10043689 bytes 2152701308 (2.0 GiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
br-e01f2aaa9bf5: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.18.0.1 netmask 255.255.0.0 broadcast 172.18.255.255
ether 02:42:44:31:54:fc txqueuelen 0 (Ethernet)
RX packets 1654739 bytes 284217999 (271.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1654739 bytes 284217999 (271.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
docker0: flags=4099<UP,BROADCAST,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255
inet6 fe80::42:8cff:fe08:a0f9 prefixlen 64 scopeid 0x20<link>
ether 02:42:8c:08:a0:f9 txqueuelen 0 (Ethernet)
RX packets 650 bytes 156927 (153.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 736 bytes 105419 (102.9 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1452
inet 10.23.143.148 netmask 255.255.0.0 broadcast 10.23.255.255
inet6 fe80::5054:ff:fe73:7e08 prefixlen 64 scopeid 0x20<link>
ether 52:54:00:73:7e:08 txqueuelen 1000 (Ethernet)
RX packets 9922240 bytes 4198752081 (3.9 GiB)
RX errors 0 dropped 404 overruns 0 frame 0
TX packets 10043689 bytes 2152701308 (2.0 GiB)
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 1000 (Local Loopback)
RX packets 1654739 bytes 284217999 (271.0 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 1654739 bytes 284217999 (271.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0本文系转载，前往查看
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