destroy-machine --force

[William Reade]

[Impact]
Unresponsive machines cannot be removed/destroyed, consuming resourcs.

[Test Case]
This of course requires a unresponsive machine; however this can be simulated by destroying a machine that is still installing.

juju destroy-machine <machineid> # will fail

juju destroy-machine --force <machineid> # will succeed

[Regression potential]
Part of the upstream tested 1.16.6 point release.

[Original bug report]
Unresponsive machine agents may require that we forcibly set the machine to Dead to allow the provisioning agent to release its instance.

see also lp:1089289

[William Reade (fwereade)]

I consider this low priority until we have the unit story sorted out cleanly.

[William Reade (fwereade)]

...but still, actually, high priority; just that it should be done after the unit is, because a replacement for a zombie machine generally cannot act usefully without replacements for its assigned zombie units in play.

See also lp:1190715

[Mark Ramm (mark-ramm)]

Is this related to the bug kapil filed?

https://bugs.launchpad.net/juju-core/+bug/1233457

[Curtis Hovey (sinzui)]

See bug 1233457 about a cases where the state-server failed to handle a cases where a dying agent's machine terminated before the state server cold tell it that it was dead.

[John A Meinel (jameinel)]

This is something we'd like to consider backporting to the 1.16 series. We may decide not to, but we don't want to forget about it.

[Kapil Thangavelu (hazmat)]

so for folks on 1.16.3 i've had put together a script that does the direct db deletion. it should only be considered after db introspection as its specifically around the scenario of a machine with no units, stuck in dying. it comes with no warranty, if you need to use it please ping me on irc before hand.

[Kapil Thangavelu (hazmat)]

Script to dump db for for foresenic analysis, used to verify db structure before use of machine removal script.

[John A Meinel (jameinel)]

The changes for this got bumped off to the side in my lp:~jameinel/juju-core/preparation-for-1.16.5
So I'm retargetting this for 1.16.5.

[John A Meinel (jameinel)]

The changes were landed back into the 1.16 series.

[Ubuntu QA Website (ubuntuqa)]

This bug has been reported on the Ubuntu ISO testing tracker.

A list of all reports related to this bug can be found here:
http://iso.qa.ubuntu.com/qatracker/reports/bugs/1089291

[Rolf Leggewie (r0lf)]

saucy has seen the end of its life and is no longer receiving any updates. Marking the saucy task for this ticket as "Won't Fix".