docker(8)：docker容器的端口映射

docker(8)：docker容器的端口映射

cker的端口映射，能保证在外部网络 访问 同一设备上不同容器时候 不会因为端口问题产生冲突。

docker 可将容器对外提供服务的端口映射到 host 的某个端口，外网通过该端口访问容器。容器启动时通过-p参数映射端口：

指定映射

• -p hostPort:containerPort      #0.0.0.0:80

• -p ip:hostPort:containerPort   #指定宿主机IP地址,例如192.168.0.136:80,多个容器都想使用80端口，添加多个IP

• -p ip::containerPort　　         #随机端口 ，32768端口，内核参数决定的net.ipv4.ip_local_port_range = 32768    60999

• -p hostPort:containerPort:udp #udp 

• -p 81:80 –p 443:443              #指定多个

默认

[root@docker-136 ~]# docker ps -a  
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@docker-136 ~]# docker run --name web1 -d -p 80:80 nginx
9d2300fd85bed6f22dec3cf7ca4cab0c1f3e753e34bdf0b6dcc152246cbecd39
[root@docker-136 ~]# netstat -lntp
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      6862/sshd           
tcp6       0      0 :::80                   :::*                    LISTEN      27641/docker-proxy  
tcp6       0      0 :::22                   :::*                    LISTEN      6862/sshd           

 

指定端口

[root@docker-136 ~]# ifconfig ens33:1 192.168.0.199/24  up
[root@docker-136 ~]# ifconfig ens33:1
ens33:1: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.199  netmask 255.255.255.0  broadcast 192.168.0.255
        ether 00:0c:29:51:f5:dd  txqueuelen 1000  (Ethernet)
 [root@docker-136 ~]#
[root@docker-136 ~]# docker ps -a      
CONTAINER ID        IMAGE               COMMAND             CREATED             STATUS              PORTS               NAMES
[root@docker-136 ~]# docker run --name web2 -d -p 192.168.0.199:80:80 nginx   
e765cce89d8041a33b832875476ad5114d1c6521d1e8c23a4e96c31ef6ab4b3d
[root@docker-136 ~]# docker run --name web1 -d -p 192.168.0.136:80:80 nginx   
234d7356881bc1717d30e5bd639b2a607bf67933faad0106ee8d9d0a0a06cd1e
[root@docker-136 ~]# netstat -lntp      
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 192.168.0.136:80        0.0.0.0:*               LISTEN      28469/docker-proxy  
tcp        0      0 192.168.0.199:80        0.0.0.0:*               LISTEN      28370/docker-proxy  
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      6862/sshd           
tcp6       0      0 :::22                   :::*                    LISTEN      6862/sshd           
[root@docker-136 ~]#

 

随机

[root@docker-136 ~]# docker run --name web3 -d -p 192.168.0.136::80 nginx
d13119eb08088b264a0727d1afd4d5961e9309ba4f28f507f5809666cccde27f
[root@docker-136 ~]# netstat -lntp      
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name    
tcp        0      0 192.168.0.136:80        0.0.0.0:*               LISTEN      28469/docker-proxy  
tcp        0      0 192.168.0.199:80        0.0.0.0:*               LISTEN      28370/docker-proxy  
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      6862/sshd           
tcp        0      0 192.168.0.136:32768     0.0.0.0:*               LISTEN      28877/docker-proxy  
tcp6       0      0 :::22                   :::*                    LISTEN      6862/sshd           
[root@docker-136 ~]#

 

多个端口

[root@docker-136 ~]# docker ps -a    
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                         NAMES
d13119eb0808        nginx               "nginx -g 'daemon of…"   2 minutes ago       Up 2 minutes        192.168.0.136:32768->80/tcp   web3
[root@docker-136 ~]#
[root@docker-136 ~]# docker run --name web4 -d -p 80:80 -p 443:443 nginx    
4927f0ef45ab2741d894a5ae5e5ccec373970a477c07bf2f9f2e9fb0ddd9f018
[root@docker-136 ~]# docker ps -a
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS                                      NAMES
4927f0ef45ab        nginx               "nginx -g 'daemon of…"   3 seconds ago       Up 1 second         0.0.0.0:80->80/tcp, 0.0.0.0:443->443/tcp   web4
d13119eb0808        nginx               "nginx -g 'daemon of…"   2 minutes ago       Up 2 minutes        192.168.0.136:32768->80/tcp                web3
[root@docker-136 ~]# netstat -lntp     
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      6862/sshd           
tcp        0      0 192.168.0.136:32768     0.0.0.0:*               LISTEN      28877/docker-proxy  
tcp6       0      0 :::80                   :::*                    LISTEN      29287/docker-proxy  
tcp6       0      0 :::22                   :::*                    LISTEN      6862/sshd           
tcp6       0      0 :::443                  :::*                    LISTEN      29276/docker-proxy  
[root@docker-136 ~]#