We don't want addr assignments to be lost from the collection before
they can be returned to the IP pools, otherwise we will get orphan
addresses marked inUse in the pools that will never be returned.
Fixestailscale/corp#39975
Signed-off-by: Fran Bull <fran@tailscale.com>
When we use assigned addresses in response to a DNS request, extend the
expiry on the assignment.
Updates tailscale/corp#39975
Signed-off-by: Fran Bull <fran@tailscale.com>
Make it possible to remove the least recently used expired address
assignment from addrAssignments.
Before checking out a new address from the IP pools, return a handful of
expired addresses.
Updates tailscale/corp#39975
Signed-off-by: Fran Bull <fran@tailscale.com>
Fran Bull