docker: Error response from daemon: Get https://registry-1.docker.io/v2/: Service Unavailable. IN DOCKER , MAC

Question

I am having this issue in my Mac system 10.11.6

system3:postgres saurabh-gupta2$ docker build -t postgres .
Sending build context to Docker daemon  38.91kB
Step          


        

Answer 1

It's clearly a proxy issue: docker proxies https connections to the wrong place. Bear in mind that docker proxy settings may be different from the operating system (and curl) ones. Here's how I managed to solve the issue:

First of all, find out where are you proxying your docker https requests:

# docker info | grep Proxy
Http Proxy: http://:8080
Https Proxy: https://:8080
No Proxy: localhost,127.0.0.1

and double check your https settings.

In my case, I realized that the "Https proxy" was set to https://... instead of http://..., so I corrected it in /etc/sysconfig/docker file (I'm using RHEL7) and, after a docker restart with:

# systemctl restart docker

the proxy variable shows up succesfully updated:

# docker info | grep Proxy
Http Proxy: http://:8080
Https Proxy: http://:8080
No Proxy: localhost,127.0.0.1

and everything works fine :-)