(1) The container port mapping
Container port mapping option uses -p, -p [a physical local port]: [Example container port]
Let centos: httpd running in the background
[root@youxi1 ~]# docker run -d -p 80:80 centos:httpd 92c1d60be419a06d24f6a8eb4c60e89a5d5e6652087ffa73bd86be320fa589e0 [root@youxi1 ~]# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 92c1d60be419 centos:httpd "/bin/sh -c /usr/loc…" 4 seconds ago Up 3 seconds 0.0.0.0:80->80/tcp jovial_chebyshev
Then use a browser to access
Open view on the physical machine 80 proxy port
[root@youxi1 ~]# yum -y install net-tools [root@youxi1 ~]# netstat -antup | grep 80 tcp 0 0 192.168.5.101:46116 114.80.24.198:80 TIME_WAIT - tcp 0 0 192.168.5.101:36968 114.80.24.199:80 TIME_WAIT - tcp 0 0 192.168.5.101:58516 114.80.24.201:80 TIME_WAIT - tcp 0 0 192.168.5.101:46120 114.80.24.198:80 TIME_WAIT - tcp 0 0 192.168.5.101:60010 114.80.24.203:443 TIME_WAIT - tcp6 0 0 :::80 :::* LISTEN 5040/docker-proxy //这一条 udp 0 0 127.0.0.1:323 0.0.0.0:* 801/chronyd udp6 0 0 ::1:323 :::* 801/chronyd
(2) Access background container instance
Syntax: docker exec -it [container ID | mirror name] / bin / bash
Into the container instance running in the background, see the IP address of the container
[root@youxi1 ~]# docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
92c1d60be419 centos:httpd "/bin/sh -c /usr/loc…" 13 minutes ago Up 13 minutes 0.0.0.0:80->80/tcp jovial_chebyshev
[root@youxi1 ~]# docker exec -it 92c1d60be419 /bin/bash
[root@92c1d60be419 /]# yum -y install net-tools
[root@92c1d60be419 /]# ifconfig
eth0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.2 netmask 255.255.0.0 broadcast 172.17.255.255 //容器实例的IP地址
ether 02:42:ac:11:00:02 txqueuelen 0 (Ethernet)
RX packets 83 bytes 319729 (312.2 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 68 bytes 4649 (4.5 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
loop txqueuelen 1000 (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
In a look at the physical machine's IP address
[root@youxi1 ~]# ifconfig
docker0: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 172.17.0.1 netmask 255.255.0.0 broadcast 172.17.255.255 //这个IP与容器实例处于同网段
inet6 fe80::42:24ff:fe5d:36c1 prefixlen 64 scopeid 0x20<link>
ether 02:42:24:5d:36:c1 txqueuelen 0 (Ethernet)
RX packets 8209 bytes 333975 (326.1 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 12228 bytes 40934054 (39.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.5.101 netmask 255.255.255.0 broadcast 192.168.5.255
inet6 fe80::201:7257:85b:7dc8 prefixlen 64 scopeid 0x20<link>
ether 00:0c:29:e6:d6:27 txqueuelen 1000 (Ethernet)
RX packets 177898 bytes 60097281 (57.3 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 112125 bytes 155022609 (147.8 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 1000 (Local Loopback)
RX packets 32 bytes 2592 (2.5 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 32 bytes 2592 (2.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
vethf3eac0e: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet6 fe80::8098:68ff:fed3:5ad7 prefixlen 64 scopeid 0x20<link>
ether 82:98:68:d3:5a:d7 txqueuelen 0 (Ethernet)
RX packets 81 bytes 5530 (5.4 KiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 98 bytes 321124 (313.5 KiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0