gcloud docker push failing "unable to ping registry endpoint https://gcr.io/v0/"

Question

I am trying to set-up Google Container Engine, I am trying to push my first Docker Container into GCE Repository, however I am getting following errors:

oash-3.2$ gcloud docker push gcr.io/prlr-dev-01/centos-7-systemd --verbosity inf 
INFO: Refreshing access_token
INFO: Refreshing access_token
INFO: Refreshing access_token
INFO: Refreshing access_token
INFO: Refreshing access_token
INFO: Refreshing access_token
INFO: Refreshing access_token
The push refers to a repository [gcr.io/prlr-dev-01/centos-7-systemd]
unable to ping registry endpoint https://gcr.io/v0/
v2 ping attempt failed with error: Get https://gcr.io/v2/: dial tcp:     lookup gcr.io on 10.0.2.3:53: read udp     10.0.2.15:56392->10.0.2.3:53: i/o timeout
v1 ping attempt failed with error: Get https://gcr.io/v1/_ping: dial tcp: lookup gcr.io on 10.0.2.3:53: read udp 10.0.2.15:35899->10.0.2.3:53: i/o timeout
bash-3.2$ 

My Docker version is:

bash-3.2$ docker --version
Docker version 1.10.2, build c3959b1
bash-3.2$ 

And my "curl ping" works just fine:

bash-3.2$ curl https://gcr.io/v1/_ping -n
truebash-3.2$ 

I got no idea where does 10.0.2.15 and 10.0.2.3 come from as I am using 192.168.1.0/24 segment on my office WiFi connection and 10.0.0.0/24 in GCE.

Do you have any clue what could be wrong?

Answer 1

As per the comments from other users, restarting docker has resolved the issue. The GCR troubleshooting guide also has useful debugging information.