[Bug 1087228] Re: /etc/network/if-down.d/bind9 doesn't work; should be /etc/network/if-post-down.d/bind9

[Thomas Hood]

Thanks, Stéphane.

It doesn't actually affect resolvconf — sorry if I gave that impression.
Because it is only the "down" script that is run at the wrong time (it
is currently run at pre-down time instead of post-down time), the effect
of the bug is minor: it only means that named is listening on the
address of an interface that has since been deconfigured. Of course, if
the admin customizes the script, misled into thinking that it gets run
at post-down time (as it apparently should be) then it could become a
bit more serious.

** Summary changed:

- /etc/network/if-down.d/bind9 doesn't work; should be /etc/network/if-post-down.d/bind9
+ The "rndc reconfig" in /etc/network/if-down.d/bind9 should be in /etc/network/if-post-down.d/bind9

** Description changed:

  The bind9 package includes /etc/network/if-down.d/bind9 which does "rndc
  reconfig". But this should only be done *after* the interface has been
  deconfigured not before.
  
  NetworkManager's /etc/NetworkManager/dispatcher.d/01ifupdown run-partses
  only /etc/network/if-up.d and /etc/network/if-post-down.d, so when an
  interface is deconfigured using NetworkManager the bind9 hook script
  doesn't get run at all; named does not notice that the interface has
  been deconfigured until its next poll (which happens every 60 minutes by
  default).
  
- It looks to me as if /etc/network/if-down.d/bind9 should be moved to
- /etc/network/if-post-down.d/.
+ It looks to me as if the "rndc reconfig" in /etc/network/if-down.d/bind9
+ should be moved into /etc/network/if-post-down.d/.
  
  bind 9 1:9.8.1.dfsg.P1-4.2ubuntu3

** Description changed:

  The bind9 package includes /etc/network/if-down.d/bind9 which does "rndc
  reconfig". But this should only be done *after* the interface has been
  deconfigured not before.
  
  NetworkManager's /etc/NetworkManager/dispatcher.d/01ifupdown run-partses
  only /etc/network/if-up.d and /etc/network/if-post-down.d, so when an
  interface is deconfigured using NetworkManager the bind9 hook script
  doesn't get run at all; named does not notice that the interface has
  been deconfigured until its next poll (which happens every 60 minutes by
  default).
  
  It looks to me as if the "rndc reconfig" in /etc/network/if-down.d/bind9
- should be moved into /etc/network/if-post-down.d/.
+ should be moved into /etc/network/if-post-down.d/bind9.
  
  bind 9 1:9.8.1.dfsg.P1-4.2ubuntu3

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https://bugs.launchpad.net/bugs/1087228

Title:
  The "rndc reconfig" in /etc/network/if-down.d/bind9 should be in
  /etc/network/if-post-down.d/bind9

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