Can not pull/push images after update docker to 1.12

Question

The private registry was worked well based on docker 1.10.3,but I can not pull/push images after the docker updated to 1.12.0.

I had modified the /etc/sysconfig/dock

Answer 1

None of the solutions worked on Ubuntu 18.04 so spend some time to find the root cause.

Steps to solve an issue

sudo vi /lib/systemd/system/docker.service
# ExecStart=dockerd .... --insecure-registry=192.168.99.100:5000
sudo systemctl stop docker.service
sudo systemctl daemon-reload
sudo systemctl start docker.service

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What was the issue?

I would recommend to check where exactly dockerd options are configured regardless of you Linux distribution with:

sudo find /etc /lib -name 'docker*' | while read -r line; do grep dockerd $line /dev/null; done