当虚拟机无法连接访问到外网https://registry-1.docker.io/v2，执行docker pull命令会抛出异常，如下：
[root@localhost default]# docker pull debian
Using default tag: latest
Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
通过设置代理可以解决：
-
创建http-proxy.conf文件:
$ mkdir -p /etc/systemd/system/docker.service.d $ vim /etc/systemd/system/docker.service.d/http-proxy.conf 添加如下内容： Environment="HTTP_PROXY=http://(host_name):(port_number)/" "HTTPS_PROXY=http://(host_name):(port_number)/"
如果设置格式如下会有 Get https://registry-1.docker.io/v2/: proxyconnect tcp: tls: first record does not look like a TLS 报错
[Service]
Environment="HTTP_PROXY=http://<allowed_proxy_ipv4_address>:<proxy_port_num>/" [Service]
Environment="HTTPS_PROXY=https://<allowed_proxy_ipv4_address>:<proxy_port_num>/"
执行reload命令:
$ sudo systemctl daemon-reload
重启docker:
$ sudo systemctl restart docker
查看环境变量值：
$ systemctl show --property=Environment docker
再次执行
[root@localhost docker.service.d]# docker pull debian Using default tag: latest latest: Pulling from library/debian 55cbf04beb70: Pull complete Digest: sha256:f1f61086ea01a72b30c7287adee8c929e569853de03b7c462a8ac75e0d0224c4 Status: Downloaded newer image for debian:latest
转自
docker设置代理服务器，解决pull命令：Error response from daemon: Get https://registry-1.docker.io/v2 - SimpleWorker - 博客园
https://www.cnblogs.com/onetwothree/p/9371752.html
Error response from daemon: Get http s://registry-1.docker.io/v2/: proxyconnect tcp: tls: first record does not look like a TLS handshake - Stack Overflow
https://stackoverflow.com/questions/50392780/error-response-from-daemon-get-http-s-registry-1-docker-io-v2-proxyconnect/50409451