$ sudo tailf /var/log/juju/machine-0.log 
2016-07-11 04:40:54 WARNING juju.cmd.jujud machine.go:758 determining kvm support: INFO: /dev/kvm does not exist
HINT:   sudo modprobe kvm_intel
modprobe: ERROR: ../libkmod/libkmod.c:586 kmod_search_moddep() could not open moddep file '/lib/modules/4.4.0-28-generic/modules.dep.bin'
modprobe: FATAL: Module msr not found in directory /lib/modules/4.4.0-28-generic
: exit status 1
no kvm containers possible
2016-07-11 04:40:54 WARNING juju.network network.go:430 cannot get "lxdbr0" addresses: route ip+net: no such network interface (ignoring)
2016-07-11 04:40:54 WARNING juju.network network.go:430 cannot get "lxdbr0" addresses: route ip+net: no such network interface (ignoring)
2016-07-11 04:40:55 WARNING juju.network network.go:430 cannot get "lxdbr0" addresses: route ip+net: no such network interface (ignoring)
2016-07-11 04:41:00 ERROR juju.rpc server.go:555 error writing response: write tcp 127.0.0.1:17070->127.0.0.1:41658: write: broken pipe