mirror of
https://github.com/k3s-io/kubernetes.git
synced 2025-07-26 05:03:09 +00:00
7c27cf0b9b
We don't need to parse out the counter values from the iptables-save output (since they are always 0 for the chains we care about). Just parse the chain names themselves. Also, all of the callers of GetChainLines() pass it input that contains only a single table, so just assume that, rather than carefully parsing only a single table's worth of the input.
99 lines
5.1 KiB
Go
99 lines
5.1 KiB
Go
/*
|
|
Copyright 2018 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 iptables
|
|
|
|
import (
|
|
"testing"
|
|
|
|
"github.com/lithammer/dedent"
|
|
)
|
|
|
|
func checkChains(t *testing.T, save []byte, expected map[Chain]struct{}) {
|
|
chains := GetChainsFromTable(save)
|
|
for chain := range expected {
|
|
if _, exists := chains[chain]; !exists {
|
|
t.Errorf("GetChainsFromTable expected chain not present: %s", chain)
|
|
}
|
|
}
|
|
for chain := range chains {
|
|
if _, exists := expected[chain]; !exists {
|
|
t.Errorf("GetChainsFromTable chain unexpectedly present: %s", chain)
|
|
}
|
|
}
|
|
}
|
|
|
|
func TestGetChainsFromTable(t *testing.T) {
|
|
iptablesSave := dedent.Dedent(`
|
|
# Generated by iptables-save v1.4.21 on Fri Aug 7 14:47:37 2015
|
|
*nat
|
|
:PREROUTING ACCEPT [2:138]
|
|
:INPUT ACCEPT [0:0]
|
|
:OUTPUT ACCEPT [0:0]
|
|
:POSTROUTING ACCEPT [0:0]
|
|
:DOCKER - [0:0]
|
|
:KUBE-NODEPORT-CONTAINER - [0:0]
|
|
:KUBE-NODEPORT-HOST - [0:0]
|
|
:KUBE-PORTALS-CONTAINER - [0:0]
|
|
:KUBE-PORTALS-HOST - [0:0]
|
|
:KUBE-SVC-1111111111111111 - [0:0]
|
|
:KUBE-SVC-2222222222222222 - [0:0]
|
|
:KUBE-SVC-3333333333333333 - [0:0]
|
|
:KUBE-SVC-4444444444444444 - [0:0]
|
|
:KUBE-SVC-5555555555555555 - [0:0]
|
|
:KUBE-SVC-6666666666666666 - [0:0]
|
|
-A PREROUTING -m comment --comment "handle ClusterIPs; NOTE: this must be before the NodePort rules" -j KUBE-PORTALS-CONTAINER
|
|
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
|
|
-A PREROUTING -m addrtype --dst-type LOCAL -m comment --comment "handle service NodePorts; NOTE: this must be the last rule in the chain" -j KUBE-NODEPORT-CONTAINER
|
|
-A OUTPUT -m comment --comment "handle ClusterIPs; NOTE: this must be before the NodePort rules" -j KUBE-PORTALS-HOST
|
|
-A OUTPUT ! -d 127.0.0.0/8 -m addrtype --dst-type LOCAL -j DOCKER
|
|
-A OUTPUT -m addrtype --dst-type LOCAL -m comment --comment "handle service NodePorts; NOTE: this must be the last rule in the chain" -j KUBE-NODEPORT-HOST
|
|
-A POSTROUTING -s 10.246.1.0/24 ! -o cbr0 -j MASQUERADE
|
|
-A POSTROUTING -s 10.0.2.15 -d 10.0.2.15 -m comment --comment "handle pod connecting to self" -j MASQUERADE
|
|
-A KUBE-PORTALS-CONTAINER -d 10.247.0.1 -p tcp -m comment --comment "portal for default/kubernetes:" -m state --state NEW -m tcp --dport 443 -j KUBE-SVC-5555555555555555
|
|
-A KUBE-PORTALS-CONTAINER -d 10.247.0.10 -p udp -m comment --comment "portal for kube-system/kube-dns:dns" -m state --state NEW -m udp --dport 53 -j KUBE-SVC-6666666666666666
|
|
-A KUBE-PORTALS-CONTAINER -d 10.247.0.10 -p tcp -m comment --comment "portal for kube-system/kube-dns:dns-tcp" -m state --state NEW -m tcp --dport 53 -j KUBE-SVC-2222222222222222
|
|
-A KUBE-PORTALS-HOST -d 10.247.0.1 -p tcp -m comment --comment "portal for default/kubernetes:" -m state --state NEW -m tcp --dport 443 -j KUBE-SVC-5555555555555555
|
|
-A KUBE-PORTALS-HOST -d 10.247.0.10 -p udp -m comment --comment "portal for kube-system/kube-dns:dns" -m state --state NEW -m udp --dport 53 -j KUBE-SVC-6666666666666666
|
|
-A KUBE-PORTALS-HOST -d 10.247.0.10 -p tcp -m comment --comment "portal for kube-system/kube-dns:dns-tcp" -m state --state NEW -m tcp --dport 53 -j KUBE-SVC-2222222222222222
|
|
-A KUBE-SVC-1111111111111111 -p udp -m comment --comment "kube-system/kube-dns:dns" -m recent --set --name KUBE-SVC-1111111111111111 --mask 255.255.255.255 --rsource -j DNAT --to-destination 10.246.1.2:53
|
|
-A KUBE-SVC-2222222222222222 -m comment --comment "kube-system/kube-dns:dns-tcp" -j KUBE-SVC-3333333333333333
|
|
-A KUBE-SVC-3333333333333333 -p tcp -m comment --comment "kube-system/kube-dns:dns-tcp" -m recent --set --name KUBE-SVC-3333333333333333 --mask 255.255.255.255 --rsource -j DNAT --to-destination 10.246.1.2:53
|
|
-A KUBE-SVC-4444444444444444 -p tcp -m comment --comment "default/kubernetes:" -m recent --set --name KUBE-SVC-4444444444444444 --mask 255.255.255.255 --rsource -j DNAT --to-destination 10.245.1.2:443
|
|
-A KUBE-SVC-5555555555555555 -m comment --comment "default/kubernetes:" -j KUBE-SVC-4444444444444444
|
|
-A KUBE-SVC-6666666666666666 -m comment --comment "kube-system/kube-dns:dns" -j KUBE-SVC-1111111111111111
|
|
COMMIT
|
|
`)
|
|
expected := map[Chain]struct{}{
|
|
ChainPrerouting: {},
|
|
Chain("INPUT"): {},
|
|
Chain("OUTPUT"): {},
|
|
ChainPostrouting: {},
|
|
Chain("DOCKER"): {},
|
|
Chain("KUBE-NODEPORT-CONTAINER"): {},
|
|
Chain("KUBE-NODEPORT-HOST"): {},
|
|
Chain("KUBE-PORTALS-CONTAINER"): {},
|
|
Chain("KUBE-PORTALS-HOST"): {},
|
|
Chain("KUBE-SVC-1111111111111111"): {},
|
|
Chain("KUBE-SVC-2222222222222222"): {},
|
|
Chain("KUBE-SVC-3333333333333333"): {},
|
|
Chain("KUBE-SVC-4444444444444444"): {},
|
|
Chain("KUBE-SVC-5555555555555555"): {},
|
|
Chain("KUBE-SVC-6666666666666666"): {},
|
|
}
|
|
checkChains(t, []byte(iptablesSave), expected)
|
|
}
|