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Message #56089
[Bug 1415221] Re: dhcp lease default is unfathomably large
[Expired for neutron because there has been no activity for 60 days.]
** Changed in: neutron
Status: Incomplete => Expired
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https://bugs.launchpad.net/bugs/1415221
Title:
dhcp lease default is unfathomably large
Status in neutron:
Expired
Bug description:
The default lease time Neutron sets right now for the DHCP agent is
86400. This means that changing the IP of a VM's port could make it
unreachable for up to 12 hours (assuming it sends a DHCP request at
half-lease intervals) because the iptables rules are immediately
updated to only match the new address even though the client is using
the old address.
Restarting the VM in this case sucks. Logging into the VM via the
console is okay as long as password based logins are still enabled,
but that's still not scriptable.
IMO this lease time is too large for networks that could have very
dynamic life-cycles with regards to addressing.
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References