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Merge pull request #108251 from danwinship/iptables-tests-cleanup

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iptables tests cleanup
This commit is contained in:
Kubernetes Prow Robot 2022-02-21 09:56:12 -08:00 committed by GitHub
commit 267272efe0
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3 changed files with 968 additions and 549 deletions
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2
pkg/proxy/iptables/proxier.go
View File

@ -1101,7 +1101,7 @@ func (proxier *Proxier) syncProxyRules() {
}
svcXlbChain := svcInfo.serviceLBChainName
if svcInfo.NodeLocalExternal() {
if hasEndpoints && svcInfo.NodeLocalExternal() {
// Only for services request OnlyLocal traffic
// create the per-service LB chain, retaining counters if possible.
if lbChain, ok := existingNATChains[svcXlbChain]; ok {

1412
pkg/proxy/iptables/proxier_test.go
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File diff suppressed because it is too large Load Diff

103
pkg/util/iptables/save_restore_test.go
View File

@ -51,3 +51,106 @@ func TestReadLinesFromByteBuffer(t *testing.T) {
expected1 = []string{"", ""}
testFn(byteArray1, expected1)
}
func checkAllLines(t *testing.T, table Table, save []byte, expectedLines map[Chain]string) {
chainLines := GetChainLines(table, save)
for chain, lineBytes := range chainLines {
line := string(lineBytes)
if expected, exists := expectedLines[chain]; exists {
if expected != line {
t.Errorf("getChainLines expected chain line not present. For chain: %s Expected: %s Got: %s", chain, expected, line)
}
} else {
t.Errorf("getChainLines expected chain not present: %s", chain)
}
}
}
func TestGetChainLines(t *testing.T) {
iptablesSave := `# Generated by iptables-save v1.4.7 on Wed Oct 29 14:56:01 2014
*nat
:PREROUTING ACCEPT [2136997:197881818]
:POSTROUTING ACCEPT [4284525:258542680]
:OUTPUT ACCEPT [5901660:357267963]
-A PREROUTING -m addrtype --dst-type LOCAL -j DOCKER
COMMIT
# Completed on Wed Oct 29 14:56:01 2014`
expected := map[Chain]string{
ChainPrerouting: ":PREROUTING ACCEPT [2136997:197881818]",
ChainPostrouting: ":POSTROUTING ACCEPT [4284525:258542680]",
ChainOutput: ":OUTPUT ACCEPT [5901660:357267963]",
}
checkAllLines(t, TableNAT, []byte(iptablesSave), expected)
}
func TestGetChainLinesMultipleTables(t *testing.T) {
iptablesSave := `# 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
# Completed on Fri Aug 7 14:47:37 2015
# Generated by iptables-save v1.4.21 on Fri Aug 7 14:47:37 2015
*filter
:INPUT ACCEPT [17514:83115836]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [8909:688225]
:DOCKER - [0:0]
-A FORWARD -o cbr0 -j DOCKER
-A FORWARD -o cbr0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -i cbr0 ! -o cbr0 -j ACCEPT
-A FORWARD -i cbr0 -o cbr0 -j ACCEPT
COMMIT
`
expected := map[Chain]string{
ChainPrerouting: ":PREROUTING ACCEPT [2:138]",
Chain("INPUT"): ":INPUT ACCEPT [0:0]",
Chain("OUTPUT"): ":OUTPUT ACCEPT [0:0]",
ChainPostrouting: ":POSTROUTING ACCEPT [0:0]",
Chain("DOCKER"): ":DOCKER - [0:0]",
Chain("KUBE-NODEPORT-CONTAINER"): ":KUBE-NODEPORT-CONTAINER - [0:0]",
Chain("KUBE-NODEPORT-HOST"): ":KUBE-NODEPORT-HOST - [0:0]",
Chain("KUBE-PORTALS-CONTAINER"): ":KUBE-PORTALS-CONTAINER - [0:0]",
Chain("KUBE-PORTALS-HOST"): ":KUBE-PORTALS-HOST - [0:0]",
Chain("KUBE-SVC-1111111111111111"): ":KUBE-SVC-1111111111111111 - [0:0]",
Chain("KUBE-SVC-2222222222222222"): ":KUBE-SVC-2222222222222222 - [0:0]",
Chain("KUBE-SVC-3333333333333333"): ":KUBE-SVC-3333333333333333 - [0:0]",
Chain("KUBE-SVC-4444444444444444"): ":KUBE-SVC-4444444444444444 - [0:0]",
Chain("KUBE-SVC-5555555555555555"): ":KUBE-SVC-5555555555555555 - [0:0]",
Chain("KUBE-SVC-6666666666666666"): ":KUBE-SVC-6666666666666666 - [0:0]",
}
checkAllLines(t, TableNAT, []byte(iptablesSave), expected)
}