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Add FV test for borrowed VXLAN tunnel IP
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // Copyright (c) 2025 Tigera, Inc. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| package infrastructure | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "net" | ||
|
|
||
| . "github.com/onsi/gomega" | ||
| ) | ||
|
|
||
| // VXLANStrategy is a strategy for assigning VXLAN configuration to a topology. | ||
| type VXLANStrategy interface { | ||
| // Returns the tunnel address to use for the Felix with the given index. | ||
| TunnelAddress(i int) string | ||
| TunnelAddressV6(i int) string | ||
| } | ||
|
|
||
| // defaultVXLANStrategy implements VXLANStrategy, assigning a block to each Felix. | ||
| type defaultVXLANStrategy struct { | ||
| v4Pool *net.IPNet | ||
| v6Pool *net.IPNet | ||
| } | ||
|
|
||
| func NewDefaultVXLANStrategy(v4Pool, v6Pool string) VXLANStrategy { | ||
| _, v4cidr, err := net.ParseCIDR(v4Pool) | ||
| Expect(err).To(BeNil()) | ||
| _, v6cidr, err := net.ParseCIDR(v6Pool) | ||
| Expect(err).To(BeNil()) | ||
|
|
||
| return &defaultVXLANStrategy{ | ||
| v4Pool: v4cidr, | ||
| v6Pool: v6cidr, | ||
| } | ||
| } | ||
|
|
||
| func (s *defaultVXLANStrategy) TunnelAddress(i int) string { | ||
| return fmt.Sprintf("%d.%d.%d.0", s.v4Pool.IP[0], s.v4Pool.IP[1], i) | ||
| } | ||
|
|
||
| func (s *defaultVXLANStrategy) TunnelAddressV6(i int) string { | ||
| cidr := s.v6Pool | ||
| return net.ParseIP(fmt.Sprintf("%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%d:0", | ||
| cidr.IP[0], cidr.IP[1], cidr.IP[2], cidr.IP[3], cidr.IP[4], cidr.IP[5], cidr.IP[6], | ||
| cidr.IP[7], cidr.IP[8], cidr.IP[9], cidr.IP[10], cidr.IP[11], i)).String() | ||
| } | ||
|
|
||
| // borrowedVXLANStrategy is a strategy for assigning VXLAN configuration to a topology | ||
| // where one node borrows its tunnel address from the IPAM block of another. | ||
| type borrowedIPVXLANStrategy struct { | ||
| v4Pool *net.IPNet | ||
| v6Pool *net.IPNet | ||
| numFelixes int | ||
| } | ||
|
|
||
| func NewBorrowedIPVXLANStrategy(v4Pool, v6Pool string, numFelixes int) VXLANStrategy { | ||
| _, v4cidr, err := net.ParseCIDR(v4Pool) | ||
| Expect(err).To(BeNil()) | ||
| _, v6cidr, err := net.ParseCIDR(v6Pool) | ||
| Expect(err).To(BeNil()) | ||
|
|
||
| return &borrowedIPVXLANStrategy{ | ||
| v4Pool: v4cidr, | ||
| v6Pool: v6cidr, | ||
| numFelixes: numFelixes, | ||
| } | ||
| } | ||
|
|
||
| func (s *borrowedIPVXLANStrategy) TunnelAddress(i int) string { | ||
| if i == s.numFelixes-1 { | ||
| // For most nodes, use the first IP of the block. However, for the last node, | ||
| // we borrow its IP from the first node's block. | ||
| return fmt.Sprintf("%d.%d.%d.1", s.v4Pool.IP[0], s.v4Pool.IP[1], 0) | ||
| } | ||
| return fmt.Sprintf("%d.%d.%d.0", s.v4Pool.IP[0], s.v4Pool.IP[1], i) | ||
| } | ||
|
|
||
| func (s *borrowedIPVXLANStrategy) TunnelAddressV6(i int) string { | ||
| cidr := s.v6Pool | ||
| if i == s.numFelixes-1 { | ||
| // For most nodes, use the first IP of the block. However, for the last node, | ||
| // we borrow its IP from the first node's block. | ||
| return net.ParseIP(fmt.Sprintf("%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%d:1", | ||
| cidr.IP[0], cidr.IP[1], cidr.IP[2], cidr.IP[3], cidr.IP[4], cidr.IP[5], cidr.IP[6], | ||
| cidr.IP[7], cidr.IP[8], cidr.IP[9], cidr.IP[10], cidr.IP[11], 0)).String() | ||
| } | ||
| return net.ParseIP(fmt.Sprintf("%x%x:%x%x:%x%x:%x%x:%x%x:%x%x:%d:0", | ||
| cidr.IP[0], cidr.IP[1], cidr.IP[2], cidr.IP[3], cidr.IP[4], cidr.IP[5], cidr.IP[6], | ||
| cidr.IP[7], cidr.IP[8], cidr.IP[9], cidr.IP[10], cidr.IP[11], i)).String() | ||
| } |
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