Information
https://docs.docker.com/articles/certificates/
2.http://docs.docker.com/articles/https/
Solution
chmod 444 <path to TLS CA certificate file>
This would set the file permissions of the TLS CA file to '444'.Impact-None.Default Value-By default, the permissions for TLS CA certificate file might not be '444'. The default file
permissions are governed by the system or user specific umask values.