Nov.08

Docker Pull behind Proxy : Get https://registry-1.docker.io/v2/: dial tcp: lookup registry-1.docker.io on server misbehaving

HTTP/HTTPS proxy

The Docker daemon uses the HTTP_PROXY, HTTPS_PROXY, and NO_PROXY environmental variables in its start-up environment to configure HTTP or HTTPS proxy behavior. You cannot configure these environment variables using the daemon.json file.

This example overrides the default docker.service file.

If you are behind an HTTP or HTTPS proxy server, for example in corporate settings, you need to add this configuration in the Docker systemd service file.

Create a systemd drop-in directory for the docker service:

 

$ sudo mkdir -p /etc/systemd/system/docker.service.d

Create a file called /etc/systemd/system/docker.service.d/http-proxy.conf that adds the HTTP_PROXY environment variable:

[Service] Environment=”HTTP_PROXY=http://proxy.example.com:80/”

Or, if you are behind an HTTPS proxy server, create a file called /etc/systemd/system/docker.service.d/https-proxy.conf that adds the HTTPS_PROXY environment variable:

[Service]Environment=”HTTPS_PROXY=https://proxy.example.com:443/”

Flush changes:

sudo systemctl daemon-reload

Restart Docker:

$ sudo systemctl restart docker

Verify that the configuration has been loaded:

$ systemctl show –property=Environment docker
Environment=HTTP_PROXY=http://proxy.example.com:80/

Or, if you are behind an HTTPS proxy server:

$ systemctl show –property=Environment docker
Environment=HTTPS_PROXY=https://proxy.example.com:443/

 

OUTPUT:

[root@zkwansible01 installer]# docker pull hello-world

Using default tag: latest

Trying to pull repository registry.access.redhat.com/hello-world …

Trying to pull repository docker.io/library/hello-world …

latest: Pulling from docker.io/library/hello-world

d1725b59e92d: Pull complete

Digest: sha256:0add3ace90ecb4adbf7777e9aacf18357296e799f81cabc9fde470971e499788

Status: Downloaded newer image for docker.io/hello-world:latest

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