Don't allow mixing "multiple-egress-IP HA" with "auto-allocated-egress-IP HA"

Author: danwinship

pkg/network/common/egressip.go

@@ -524,7 +524,19 @@ func (eit *EgressIPTracker) findEgressIPAllocation(ip net.IP, allocation map[str
 }
 
 func (eit *EgressIPTracker) makeEmptyAllocation() (map[string][]string, map[string]bool) {
-	return make(map[string][]string), make(map[string]bool)
+	allocation := make(map[string][]string)
+	alreadyAllocated := make(map[string]bool)
+
+	// We don't want to auto-allocate/reallocate IPs for NetNamespaces using
+	// multiple-egress-IP HA, so those should be considered "already allocated"
+	// even before we start.
+	for egressIP, eip := range eit.egressIPs {
+		if eip.assignedNodeIP != "" && len(eip.namespaces[0].requestedIPs) > 1 {
+			alreadyAllocated[egressIP] = true
+		}
+	}
+
+	return allocation, alreadyAllocated
 }
 
 func (eit *EgressIPTracker) allocateExistingEgressIPs(allocation map[string][]string, alreadyAllocated map[string]bool) bool {

pkg/network/common/egressip_test.go

@@ -997,6 +997,29 @@ func TestEgressCIDRAllocation(t *testing.T) {
 	if err != nil {
 		t.Fatalf("%v", err)
 	}
+
+	// You can't mix multiple-egress-IP HA with auto-allocated-egress-IP HA
+	updateNetNamespaceEgress(eit, &networkapi.NetNamespace{
+		NetID:     45,
+		EgressIPs: []string{"172.17.0.102", "172.17.0.302"},
+	})
+	err = w.assertChanges(
+		"update egress CIDRs",
+	)
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
+
+	allocation = eit.ReallocateEgressIPs()
+	updateAllocations(eit, allocation)
+	err = w.assertChanges(
+		"release 172.17.0.102 on 172.17.0.4",
+		"namespace 45 dropped",
+		"update egress CIDRs",
+	)
+	if err != nil {
+		t.Fatalf("%v", err)
+	}
 }
 
 func TestEgressNodeRenumbering(t *testing.T) {