Signed-off-by: Christoph Heiss <c.he...@proxmox.com> --- Changes v2 -> v3: * new patch
qm.adoc | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/qm.adoc b/qm.adoc index 8b9e096..823e818 100644 --- a/qm.adoc +++ b/qm.adoc @@ -1664,6 +1664,22 @@ For Live Migration to work, there are some things required: configured, but it cannot be guaranteed - so please test before deploying such a setup in production. +Conntrack State Migration +^^^^^^^^^^^^^^^^^^^^^^^^^ + +NOTE: Conntrack state migration is considered best-effort only and might not +work, as it heavily depends on the network setup. + +Conntrack is a Linux kernel mechanism to enable a stateful firewall by tracking +individual connection. When live migrating running VMs, active in- and/or +outbound connections *might* get interrupted as soon as the VM starts running on +the target host, as the new host node does not have the same conntrack entries +and thus the firewall can drop packets. + +Conntrack state migration copies all conntrack entries on the host for the +live-migrated VM to the target node and afterwards flushes the migrated entries +from the conntrack table on the source node. + Offline Migration ~~~~~~~~~~~~~~~~~ -- 2.49.0 _______________________________________________ pve-devel mailing list pve-devel@lists.proxmox.com https://lists.proxmox.com/cgi-bin/mailman/listinfo/pve-devel
