ovn-kubernetes / ovn-kubernetes / 23962595630

57%

master: 57%

Build Type

Pull #6172

github

Committed by aserdean

Commit Message

node: add cross-node host IP routing for multi-homed IC nodes

In DPU setups, worker nodes are multi-homed — they have a management
network IP (accessible via the physical uplink) and a data network IP
(reachable only through the directly cabled DPU uplink). In IC mode,
a pod on zone A trying to reach zone B's data network host IP has no
OVN path since there are no routes or PBR rules for it.

Add PBR rules at InterNodePolicyPriority (1003) and cluster router
static routes so pod-to-host cross-zone traffic is steered through the
transit switch to the destination node's mp0. Add GR static routes and
masquerade SNAT so host-originated traffic to remote zone host IPs
traverses the join switch instead of the physical network.

Rules are only installed when a node has 2+ host IPs in the same IP
family (NodeIsMultiHomed), leaving single-homed deployments unaffected.

Signed-off-by: Alin Serdean <aserdean@nvidia.com>
Fixes: https://github.com/ovn-kubernetes/ovn-kubernetes/issues/5827

Pull Request Pull Request #6172: node: add cross-node host IP routing for multi-homed IC nodes

Run Details

121 of 367 new or added lines in 6 files covered. (32.97%)

30 existing lines in 7 files now uncovered.

49078 of 85542 relevant lines covered (57.37%)

376.61 hits per line