c12534d8b4
It seems that if you set the packet mark on a packet and then route that packet through a kernel VXLAN interface, the VXLAN-encapsulated packet will still have the mark from the original packet. Since our NAT rules are based on the packet mark, this was causing us to double-NAT some packets, which then triggered a kernel checksumming bug. But even without the checksum bug, there are reasons to avoid double-NATting, so fix the rules to unmark the packets before masquerading them.
46 lines
951 B
Go
46 lines
951 B
Go
// +build linux
|
|
|
|
/*
|
|
Copyright 2016 The Kubernetes Authors.
|
|
|
|
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 kubelet
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"github.com/stretchr/testify/assert"
|
|
)
|
|
|
|
func TestGetIPTablesMark(t *testing.T) {
|
|
tests := []struct {
|
|
bit int
|
|
expect string
|
|
}{
|
|
{
|
|
14,
|
|
"0x00004000",
|
|
},
|
|
{
|
|
15,
|
|
"0x00008000",
|
|
},
|
|
}
|
|
for _, tc := range tests {
|
|
res := getIPTablesMark(tc.bit)
|
|
assert.Equal(t, tc.expect, res, "input %d", tc.bit)
|
|
}
|
|
}
|