I agree with jameinel,
supporting kind of apt_security_mirror is better rather than failsafe.
but still there is one issue if juju can support sort of 'apt_security_mirror' from now.
because of differences between cloud-init versions on trusty and xenial.
I'm not sure it's possible to make cloud-init on trusty support apt_seurity_mirror via SRU process.
I agree with jameinel,
supporting kind of apt_security_mirror is better rather than failsafe.
but still there is one issue if juju can support sort of 'apt_security_ mirror' from now.
because of differences between cloud-init versions on trusty and xenial.
I'm not sure it's possible to make cloud-init on trusty support apt_seurity_mirror via SRU process.