Use sudo snap install snappy-debug and then simply launch it to have it follow the logs and provide suggestions: $ sudo snap install snappy-debug
When debugging policy issues, the curity tool can help. The most up to date information on snappy confinement can be found here: Ubuntu Core 15.04 spec can be viewed here: Please see the security whitepaper for the most up to date information on Ubuntu Core series 16: (starting at section 'Snappy for Ubuntu Core') In short, applications are confined by default through the use of various technologies and this is achieved through a simple template-based system where policy is extended through the use of interfaces. The basic concepts for confined applications and the AppStore model pertain to snappy applications as well. Snappy confinement is an evolution of the security model for Ubuntu Touch.
Packages affected: apparmor, libseccomp, ubuntu-core-security, ubuntu-snappy, ubuntu-core-launcher (historically, click-apparmor)
Contributors: Jamie Strandboge, Tyler Hicks