1，问题描述

nginx外网 + harbor nginx容器配置：

外网nginx代理后harbor域名：harbor01.io   
 harbor.cfg ( hostname = 192.168.56.72 ) ---> pull harbor01.io/xx/yy  err
 harbor.cfg ( hostname = harbor01.io )   ---> pull harbor01.io/xx/yy  ok, push err

common/config/nginx/nginx.conf  
 修改配置/ , /v2/ , /service/ 
 (proxy_set_header X-Forwarded-Proto https) ---> push harbor01.io/xx/yy  ok, pull err

能pull镜像，但是push 镜像出现的问题：unauthorized: authentication required

[root@c7 wrapper-linux-x86-64-3.5.49]# docker push harbor01.io/kuai/nginx
The push refers to repository [harbor01.io/kuai/nginx]
d9eb91d66e2a: Pushing [==================================================>]  3.584kB
ae1f545e4c08: Pushing [=============>                                     ]     512B/1.961kB
c20672db3628: Pushing [==================================================>]  3.072kB
4cbb728cd302: Preparing
9eb82f04c782: Preparing
unauthorized: authentication required

2，问题解决

参考：https://www.cnblogs.com/chenminklutz/p/13446164.html

把X-Forwarded-Proto设置为https，临时解决外网push镜像问题
把X-Forwarded-Proto还原，临时解决pull镜像问题

#################### docker客户端pull / push 镜像
[root@c7 ~]# docker push harbor01.io/kuai/nginx
The push refers to repository [harbor01.io/kuai/nginx]
d9eb91d66e2a: Pushing [==================================================>]  3.584kB
ae1f545e4c08: Pushing [=============>                                     ]     512B/1.961kB
c20672db3628: Pushing [==================================================>]  3.072kB
4cbb728cd302: Preparing
9eb82f04c782: Preparing
unauthorized: authentication required

#################### harbor服务端
#1，修改harbor.cfg  ，把hostname改为与外网nginx一致的代理域名
[root@JXQ-11-243-32-211 harbor]# grep hostname /export/harbor/harbor.cfg 
#hostname = 192.168.56.72
hostname = harbor01.io

#2，修改harbor nginx容器配置
[root@JXQ-11-243-32-211 harbor]# cd common/config/nginx/
[root@JXQ-11-243-32-211 nginx]# ll
total 32
drwx------ 2 65534 root 4096 Apr 18 15:57 client_body_temp
drwxr-xr-x 2 root  root 4096 Apr 18 15:57 conf.d
drwx------ 2 65534 root 4096 Apr 18 15:57 fastcgi_temp
-rw-r----- 1 root  root 3353 Apr 25 09:35 nginx.conf
-rw-r----- 1 root  root 3654 Apr 22 15:21 nginx.conf.bak
drwx------ 2 65534 root 4096 Apr 18 15:57 proxy_temp
drwx------ 2 65534 root 4096 Apr 18 15:57 scgi_temp
drwx------ 2 65534 root 4096 Apr 18 15:57 uwsgi_temp

# 备份原有的配置文件 .ori , 然后修改nginx.conf
[root@JXQ-11-243-32-211 harbor]# cp common/config/nginx/nginx.conf common/config/nginx/nginx.conf.ori 
[root@JXQ-11-243-32-211 harbor]# cp common/config/nginx/nginx.conf common/config/nginx/nginx.conf.https 
[root@JXQ-11-243-32-211 harbor]# vim common/config/nginx/nginx.conf.https
# 修改配置/ , /v2/ , /service/ 
#	  (proxy_set_header X-Forwarded-Proto https) ---> pull harbor01.io/xx/yy  err, push ok	  
[root@JXQ-11-243-32-211 harbor]# grep 'X-Forwarded-Proto' common/config/nginx/nginx.conf.https 
      proxy_set_header X-Forwarded-Proto https;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Forwarded-Proto $scheme;
      proxy_set_header X-Forwarded-Proto https;
      proxy_set_header X-Forwarded-Proto https;

[root@JXQ-11-243-32-211 harbor]# cd common/config/nginx/
[root@JXQ-11-243-32-211 nginx]# ln -sf nginx.conf.https  nginx.conf
[root@JXQ-11-243-32-211 nginx]# ll
total 32
drwx------ 2 65534 root 4096 Apr 18 15:57 client_body_temp
drwxr-xr-x 2 root  root 4096 Apr 18 15:57 conf.d
drwx------ 2 65534 root 4096 Apr 18 15:57 fastcgi_temp
lrwxrwxrwx 1 root  root   14 Apr 25 10:14 nginx.conf -> nginx.conf.ori
-rw-r----- 1 root  root 3647 Apr 25 10:14 nginx.conf.https
-rw-r----- 1 root  root 3653 Apr 25 09:40 nginx.conf.ori
	  
[root@JXQ-11-243-32-211 nginx]# docker restart nginx