yahoo-eng-team team mailing list archive

["Alexey I. Froloff" <1521666@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

dhcp_relase does not work with IPv6, but IPv6 leases still should be
released.  Example:

1. Start VM in dhcpv6-statefull network, make it acquire IPv6 address.
2. Delete VM.
3. Start another VM in same network before lease expires.

There's a very high chance that same IPv6 address will be allocated for
both these VMs (same address will be reused after first VM was delete).
On DHCP agent hosts file would be changed, but lease file not, so
dnsmasq will not give second VM address until lease expitres.  Reducing
lease time is not a good solution here...

** Affects: neutron
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1521666

Title:
  DHCP agent should release IPv6 leases

Status in neutron:
  New

Bug description:
  dhcp_relase does not work with IPv6, but IPv6 leases still should be
  released.  Example:

  1. Start VM in dhcpv6-statefull network, make it acquire IPv6 address.
  2. Delete VM.
  3. Start another VM in same network before lease expires.

  There's a very high chance that same IPv6 address will be allocated
  for both these VMs (same address will be reused after first VM was
  delete).  On DHCP agent hosts file would be changed, but lease file
  not, so dnsmasq will not give second VM address until lease expitres.
  Reducing lease time is not a good solution here...

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