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
If you are using Windows and you get this error you need to create a file here: "C:\ProgramData\docker\config\daemon.json"
and do the same as @Bspec mentioned above:
{ "insecure-registries":["myregistry.example.com:5000"] }
Then restart docker using PowerShell commands:
Stop-Service docker
Start-Service docker