[pve-devel] [RFC qemu-server/common] fix #4501: improve port reservation for QEMU TCP migration

Fiona Ebner f.ebner at proxmox.com
Tue Nov 14 15:02:01 CET 2023

Each patch is a different approach for improving the situation and
each subset could be applied. Personally, I like common 2/2, because
it removes the competition for early ports and IMHO the only one
worth considering a full fix, but it is a bit complex.

Another approach (not in the RFC, also could be considered a full fix)
would be to opt-in for a higher expire time for migration ports, add a
mechanism to remove the reservation and have vm_start_nolock() remove
the reservation after it made sure that QEMU got the port.


Fiona Ebner (1):
  partially fix #4501: migration: start vm: move port reservation and
    usage closer together

 PVE/QemuServer.pm | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)


Fiona Ebner (2):
  partially fix #4501: next unused port: bump port reservation
  fix #4501: next unused port: work around issue with too short

 src/PVE/Tools.pm | 21 +++++++++++++++++++--
 1 file changed, 19 insertions(+), 2 deletions(-)


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