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fix(network/reconcile): key DHCP_Options lookup by subnet_id not CIDR

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Multi-tenant default VPCs share the same subnet CIDR (172.31.0.0/20) per
account. The existing FindDHCPOptionsByCIDR gate at apply.go:107 found
the first account's DHCP_Options row and skipped creation for every
subsequent subnet with the same CIDR. Those subnets' ports then attached
nothing (FindDHCPOptionsByExternalID misses on subnet_id), VMs got no
DHCPv4 lease, and SSH/ICMP into them silently failed even though SG
ACLs and NAT were correct.

Switch the gate to FindDHCPOptionsByExternalID keyed on spinifex:subnet_id
so each subnet owns its own row, matching the attach lookup at line 203.

Verified: account 000000000001 default VPC RunInstances now produces an
LSP with dhcpv4_options populated, VM cloud-init reports a 172.31.0.5/20
lease + default route via 172.31.0.1, and ping + ssh TCP handshake to
the EIP succeed end-to-end. Stale DHCP_Options row for the prior dead
subnet was wiped manually; reconciler recreated the correct row for the
live subnet on its next pass.
This commit is contained in:
joshsiv-mulga
2026-05-25 12:35:45 +10:00
parent ec2bb542e3
commit f47844619d
1 changed files with 1 additions and 1 deletions
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spinifex/network/reconcile/apply.go
+1 -1
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@@ -104,7 +104,7 @@ func (r *reconciler) applySubnets(ctx context.Context, intent IntentState, actua
}
}
if existing, err := r.ovn.FindDHCPOptionsByCIDR(ctx, spec.CIDR.String()); err != nil || existing == nil {
if existing, err := r.ovn.FindDHCPOptionsByExternalID(ctx, "spinifex:subnet_id", subnetID); err != nil || existing == nil {
opts := &nbdb.DHCPOptions{
CIDR: spec.CIDR.String(),
Options: map[string]string{