I have a charm named my-rts on my machine which failed while starting. Now I am try to remove the application, unit and machine but it does not gets deleted somehow.
I tried to remove all 3 using commands:
$ juju remove-machine 3
$ juju remove-unit my-rts/0
$ juju remove-application my-rts
And then on juju status, I see them still there.
$ juju status
Model Controller Cloud/Region Version
default test localhost/localhost 2.0.2
App Version Status Scale Charm Store Rev OS Notes
my-rts error 1 my-rts jujucharms 0 ubuntu
Unit Workload Agent Machine Public address Ports Message
my-rts/0* error idle 3 10.206.116.199 hook failed: "start"
Machine State DNS Inst id Series AZ
3 stopped 10.206.116.199 juju-f1075c-3 trusty
Turns out that i was missing a very common solution for such situation. That is to do it forcefully.
juju remove-machine MachineID --force helped.
More information can be found @ https://github.com/juju/juju/issues/5293