最近在替换ssl证书，重建nginx容器时，报错Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

[root@ecs-1 nginx]# docker build -t modb/nginx:prod  .
Sending build context to Docker daemon  62.98kB
Step 1/10 : FROM nginx:1.17
Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

临时解决方案

这里直接原因就是网络不通的原因，尝试更换了nameserver无效，在不重启服务的情况下临时方案如下：

docker cp ./ssl/. nginx:/etc/nginx/ssl/
docker exec nginx nginx -s reload

也就是手工将ssl文件cp到容器内，然后reload nginx即可。

国内镜像加速

最优解决方案还是设置国内镜像加速，这一步要重启容器。可以使用免费的镜像，我这里使用的华为云的镜像加速地址，
在你的 ECS 上，创建或修改 /etc/docker/daemon.json：

{
  "registry-mirrors": [
    "https://<your-id>.mirror.swr.myhuaweicloud.com"
  ]
}

⚠️ 需要替换成控制台显示的专属加速地址，可以在https://console.huaweicloud.com/swr/登陆后查看。

重启docker

systemctl daemon-reload
systemctl restart docker

成功重建

[root@ecs-1 nginx]# docker build -t modb/nginx:prod  .
Sending build context to Docker daemon  62.98kB
Step 1/10 : FROM nginx:1.17
1.17: Pulling from library/nginx
Digest: sha256:6fff55753e3b34e36e24e37039ee9eae1fe38a6420d8ae16ef37c92d1eb26699
Status: Downloaded newer image for nginx:1.17
 ---> a48d4f95ac74
Step 2/10 : RUN apt-get update && apt-get install -y libencode-perl libdbi-perl default-mysql-client fcgiwrap libhtml-parser-perl spawn-fcgi
 ---> Using cache
 ---> 04efc22e7329
Step 3/10 : EXPOSE 80 443 8123 8880
 ---> Using cache
 ---> a3eac58d6eb5
Step 4/10 : VOLUME /u01
 ---> Using cache
 ---> 4cc0f8f422f4
Step 5/10 : ADD nginx.conf /etc/nginx/nginx.conf
 ---> Using cache
 ---> 761cba90aa99
Step 6/10 : ADD fcgi-init.sh /opt/fcgi-init.sh
 ---> Using cache
 ---> f20106589fd3
Step 7/10 : RUN rm -rf /etc/nginx/conf.d/default.conf
 ---> Using cache
 ---> 06972b4e6696
Step 8/10 : COPY 443.*.conf /etc/nginx/conf.d/
 ---> Using cache
 ---> e84e508e9066
Step 9/10 : COPY ./ssl/* /etc/nginx/ssl/
 ---> 8f653c0b8c6d
Step 10/10 : CMD ["sh", "/opt/fcgi-init.sh"]
 ---> Running in 64c1898c75b1
Removing intermediate container 64c1898c75b1
 ---> 902fca5735a0
Successfully built 902fca5735a0
Successfully tagged modb/nginx:prod
[root@ecs-1 nginx]#