如何查看容器端口到宿主机端口的映射关系？

使用docker port命令进行查看

# 查看容器的ID
[root@nccztsjb-node-27 ~]# docker ps | grep nginx
78e7140c0b8c   goharbor/nginx-photon:v2.6.1                "nginx -g 'daemon of…"   2 months ago   Up 2 months (healthy)   0.0.0.0:80->8080/tcp, :::80->8080/tcp                    nginx
3327bc10a1ba   goharbor/harbor-portal:v2.6.1               "nginx -g 'daemon of…"   2 months ago   Up 2 months (healthy)                                                            harbor-portal
[root@nccztsjb-node-27 ~]# 

# 78e7140c0b8c是容器的ID

[root@nccztsjb-node-27 ~]# docker port 78e7140c0b8c   
8080/tcp -> 0.0.0.0:80
8080/tcp -> :::80

# 也可以用容器的名字

[root@nccztsjb-node-27 ~]# docker port nginx
8080/tcp -> 0.0.0.0:80
8080/tcp -> :::80
[root@nccztsjb-node-27 ~]# 

docker port的输出中，左边额一列，箭头的左边是容器内的端口号，箭头的右边是在宿主机上映射出来的端口好，绑定到哪个IP，哪个具体的端口上了。