Public bug reported:
version: Pike, DVR enabled, 28 compute nodes
scenario: spawn 140 VMs concurrently, with pre-created neutron ports
issue: on some compute nodes VMs cannot get IP address, no reply on dhcp
broadcasts. All new VMs spawned on the same compute node in the same network
have this problem.
it appears that flood table on compute nodes with issue is missing
outputs to dhcp nodes:
cookie=0x679aebcfbb8dc9a2, duration=296.991s, table=22, n_packets=2,
n_bytes=220, priority=1,dl_vlan=4
actions=strip_vlan,load:0x14->NXM_NX_TUN_ID[],output:"vxlan-
ac1ef47a",output:"vxlan-ac1ef480",output:"vxlan-ac1ef46d",output:"vxlan-
ac1ef477",...
** Affects: neutron
Importance: High
Assignee: Oleg Bondarev (obondarev)
Status: Confirmed
** Tags: l2-pop l3-dvr-backlog
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https://bugs.launchpad.net/bugs/1789846
Title:
l2_pop flows missing when spawning VMs at a high rate
Status in neutron:
Confirmed
Bug description:
version: Pike, DVR enabled, 28 compute nodes
scenario: spawn 140 VMs concurrently, with pre-created neutron ports
issue: on some compute nodes VMs cannot get IP address, no reply on dhcp
broadcasts. All new VMs spawned on the same compute node in the same network
have this problem.
it appears that flood table on compute nodes with issue is missing
outputs to dhcp nodes:
cookie=0x679aebcfbb8dc9a2, duration=296.991s, table=22, n_packets=2,
n_bytes=220, priority=1,dl_vlan=4
actions=strip_vlan,load:0x14->NXM_NX_TUN_ID[],output:"vxlan-
ac1ef47a",output:"vxlan-ac1ef480",output:"vxlan-ac1ef46d",output
:"vxlan-ac1ef477",...
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