docker: Error response from daemon: Get https://registry-1.docker.io/v2/: net/http: request canceled while waiting for connection

How can I fix this problem in Ubuntu 20.04?

[18:31:29] (dpcc) jalal@echo:~/research/code$ sudo docker pull docurdt/heal
[sudo] password for jalal:
Using default tag: latest
Error response from daemon: Get net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
$ uname -a
Linux echo 5.4.0-99-generic #112-Ubuntu SMP Thu Feb 3 13:50:55 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
$ docker --version
Docker version 20.10.7, build 20.10.7-0ubuntu5~20.04.2

I don't have a problem with this $ docker pull on CentOS 7.

Here are the proxy I have used in ~/.bashrc:

export http_proxy=""
export https_proxy=""
export ftp_proxy=""
export rsync_proxy=$http_proxy
export no_proxy="localhost,127.0.0.1,.bu.edu,.ad.bu.edu,128.197.,10."

Added these in config.json but the error still persist after logout:

$ cat ~/.docker/config.json
{ "proxies": { "default": { "httpProxy": "", "httpsProxy": "", "noProxy": "localhost,127.0.0.1,.bu.edu,.ad.bu.edu,128.197.,10." } }
}

I get:

[19:38:02] jalal@echo:~/research/code$ docker pull docurdt/heal
Using default tag: latest
Error response from daemon: Get net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)

1 Answer

$ sudo mkdir -p /etc/systemd/system/docker.service.d
$ sudo vi /etc/systemd/system/docker.service.d/http-proxy.conf
$ sudo systemctl daemon-reload
$ sudo systemctl restart docker
$ docker pull docurdt/heal
Using default tag: latest
latest: Pulling from docurdt/heal
e79bb959ec00: Pull complete
7dc808d5d247: Pull complete
04e0dd83f1c1: Pull complete
7680ea831bfd: Pull complete
f861c2ba948a: Pull complete
27ae46f94ae6: Pull complete
92a8fc1df4e5: Pull complete
d6ff073d4a06: Pull complete
626ee3046583: Pull complete
Digest: sha256:31f30cf69b3271fffcba4c439ee19c92587969cd74ec649ec72dec84ce177b86
Status: Downloaded newer image for docurdt/heal:latest

This is what I have in http-proxy.conf:

$ cat /etc/systemd/system/docker.service.d/http-proxy.conf
[Service]
Environment="HTTP_PROXY="
Environment="HTTPS_PROXY=""

Thanks a lot to twainwek from IRC for his time and also sharing this link with me