Static Routes with nexthop non-functional for private gateways#12859
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bhouse-nexthop wants to merge 2 commits intoapache:4.22from
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Static Routes with nexthop non-functional for private gateways#12859bhouse-nexthop wants to merge 2 commits intoapache:4.22from
bhouse-nexthop wants to merge 2 commits intoapache:4.22from
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Static routes were only being added to the main routing table, but policy-based routing (PBR) is active on VPC routers. This caused traffic coming in from specific interfaces to not find the static routes, as they use interface-specific routing tables (Table_ethX). This fix: - Adds a helper method to find which interface a gateway belongs to by matching the gateway IP against configured interface subnets - Modifies route add/delete operations to update both the main table and the appropriate interface-specific PBR table - Uses existing CsAddress databag metadata to avoid OS queries - Handles both add and revoke operations for proper cleanup - Adds comprehensive logging for troubleshooting Fixes apache#12857
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@weizhouapache can you approve the workflow runs and review this. I've just confirmed this fixes both of my issues. |
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When static routes use nexthop (gateway) instead of referencing a private gateway's public IP, the iptables FORWARD rules were not being generated. This caused traffic to be dropped by ACLs. This fix: - Adds a shared helper CsHelper.find_device_for_gateway() to determine which interface a gateway belongs to by checking subnet membership - Updates CsStaticRoutes to use the shared helper instead of duplicating the device-finding logic - Modifies CsAddress firewall rule generation to handle both old-style (ip_address-based) and new-style (nexthop-based) static routes - Generates the required FORWARD and PREROUTING rules for nexthop routes: * -A PREROUTING -s <network> ! -d <interface_ip>/32 -i <dev> -j ACL_OUTBOUND_<dev> * -A FORWARD -d <network> -o <dev> -j ACL_INBOUND_<dev> * -A FORWARD -d <network> -o <dev> -m state --state RELATED,ESTABLISHED -j ACCEPT Fixes the second part of apache#12857
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copilot issues, eh? |
Codecov Report✅ All modified and coverable lines are covered by tests.
Additional details and impacted files@@ Coverage Diff @@
## 4.22 #12859 +/- ##
=============================================
- Coverage 17.61% 3.70% -13.91%
=============================================
Files 5917 448 -5469
Lines 531430 38028 -493402
Branches 64973 7036 -57937
=============================================
- Hits 93586 1409 -92177
+ Misses 427288 36432 -390856
+ Partials 10556 187 -10369
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Description
Static routes were only being added to the main routing table, but policy-based routing (PBR) is active on VPC routers. This caused traffic coming in from specific interfaces to not find the static routes, as they use interface-specific routing tables (Table_ethX).
This fix:
Fixes #12857
Types of changes
Feature/Enhancement Scale or Bug Severity
Feature/Enhancement Scale
Bug Severity
Screenshots (if appropriate):
How Has This Been Tested?
See #12857 for the tested scenario
How did you try to break this feature and the system with this change?