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Merge pull request #65803 from honkiko/ipvs-add-addrtype-match

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Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.

ipvs: add addrtype match for nodeport

**What this PR does / why we need it**:
before this PR:
```
-A KUBE-SERVICES -m comment --comment "Kubernetes nodeport TCP port for masquerade purpose" -m set --match-set KUBE-NODE-PORT-TCP dst -j KUBE-NODE-PORT
-A KUBE-SERVICES -m comment --comment "Kubernetes service cluster ip + port for masquerade purpose" -m set --match-set KUBE-CLUSTER-IP dst,dst -j KUBE-MARK-MASQ
-A KUBE-SERVICES -m set --match-set KUBE-CLUSTER-IP dst,dst -j ACCEPT
-A KUBE-NODE-PORT -p tcp -m comment --comment "Kubernetes nodeport TCP port with externalTrafficPolicy=local" -m set --match-set KUBE-NODE-PORT-LOCAL-TCP dst -j RETURN
-A KUBE-NODE-PORT -j KUBE-MARK-MASQ
```
after this PR:
```
-A KUBE-NODE-PORT -p tcp -m comment --comment "Kubernetes nodeport TCP port with externalTrafficPolicy=local" -m set --match-set KUBE-NODE-PORT-LOCAL-TCP dst -j RETURN
-A KUBE-NODE-PORT -p tcp -m comment --comment "Kubernetes nodeport TCP port for masquerade purpose" -m set --match-set KUBE-NODE-PORT-TCP dst -j KUBE-MARK-MASQ
-A KUBE-SERVICES -m comment --comment "Kubernetes service cluster ip + port for masquerade purpose" -m set --match-set KUBE-CLUSTER-IP dst,dst -j KUBE-MARK-MASQ
-A KUBE-SERVICES -m set --match-set KUBE-CLUSTER-IP dst,dst -j ACCEPT
-A KUBE-SERVICES -m addrtype --dst-type LOCAL -j KUBE-NODE-PORT
```

**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #65459

**Special notes for your reviewer**:
manually tested cases:
- ClusterIP distributed to pod on same node
- ClusterIP distributed to pod on other node
- NodePort distributed to pod on same node
- NodePort distributed to pod on other node

**Release note**:

```release-note

```
This commit is contained in:
Kubernetes Submit Queue 2018-08-13 00:28:43 -07:00 committed by GitHub
commit 4492337dbf
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2 changed files with 15 additions and 13 deletions
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16
pkg/proxy/ipvs/proxier.go
View File

@ -135,6 +135,7 @@ var ipsetInfo = []struct {
// `iptables -t nat -A <from> -m set --match-set <name> <matchType> -j <to>`
// example: iptables -t nat -A KUBE-SERVICES -m set --match-set KUBE-NODE-PORT-TCP dst -j KUBE-NODE-PORT
// ipsets with other match rules will be created Individually.
// Note: kubeNodePortLocalSetTCP must be prior to kubeNodePortSetTCP, the same for UDP.
var ipsetWithIptablesChain = []struct {
name string
from string
@ -148,10 +149,10 @@ var ipsetWithIptablesChain = []struct {
{kubeLoadBalancerSourceCIDRSet, string(KubeFireWallChain), "RETURN", "dst,dst,src", ""},
{kubeLoadBalancerSourceIPSet, string(KubeFireWallChain), "RETURN", "dst,dst,src", ""},
{kubeLoadBalancerLocalSet, string(KubeLoadBalancerChain), "RETURN", "dst,dst", ""},
{kubeNodePortSetTCP, string(kubeServicesChain), string(KubeNodePortChain), "dst", "tcp"},
{kubeNodePortLocalSetTCP, string(KubeNodePortChain), "RETURN", "dst", "tcp"},
{kubeNodePortSetUDP, string(kubeServicesChain), string(KubeNodePortChain), "dst", "udp"},
{kubeNodePortSetTCP, string(KubeNodePortChain), string(KubeMarkMasqChain), "dst", "tcp"},
{kubeNodePortLocalSetUDP, string(KubeNodePortChain), "RETURN", "dst", "udp"},
{kubeNodePortSetUDP, string(KubeNodePortChain), string(KubeMarkMasqChain), "dst", "udp"},
}
var ipvsModules = []string{
@ -1280,11 +1281,12 @@ func (proxier *Proxier) writeIptablesRules() {
writeLine(proxier.natRules, append(dstLocalOnlyArgs, "-j", "ACCEPT")...)
}
// mark masq for KUBE-NODE-PORT
writeLine(proxier.natRules, []string{
"-A", string(KubeNodePortChain),
"-j", string(KubeMarkMasqChain),
}...)
// -A KUBE-SERVICES -m addrtype --dst-type LOCAL -j KUBE-NODE-PORT
args = append(args[:0],
"-A", string(kubeServicesChain),
"-m", "addrtype", "--dst-type", "LOCAL",
)
writeLine(proxier.natRules, append(args, "-j", string(KubeNodePortChain))...)
// mark drop for KUBE-LOAD-BALANCER
writeLine(proxier.natRules, []string{

12
pkg/proxy/ipvs/proxier_test.go
View File

@ -477,11 +477,11 @@ func TestNodePortUDP(t *testing.T) {
// Check iptables chain and rules
epIpt := netlinktest.ExpectedIptablesChain{
string(kubeServicesChain): {{
JumpChain: string(KubeNodePortChain), MatchSet: kubeNodePortSetUDP,
}},
string(KubeNodePortChain): {{
JumpChain: string(KubeMarkMasqChain), MatchSet: "",
JumpChain: string(KubeMarkMasqChain), MatchSet: kubeNodePortSetUDP,
}},
string(kubeServicesChain): {{
JumpChain: string(KubeNodePortChain), MatchSet: "",
}},
}
checkIptables(t, ipt, epIpt)
@ -1063,12 +1063,12 @@ func TestOnlyLocalNodePorts(t *testing.T) {
// Check iptables chain and rules
epIpt := netlinktest.ExpectedIptablesChain{
string(kubeServicesChain): {{
JumpChain: string(KubeNodePortChain), MatchSet: kubeNodePortSetTCP,
JumpChain: string(KubeNodePortChain), MatchSet: "",
}},
string(KubeNodePortChain): {{
JumpChain: "RETURN", MatchSet: kubeNodePortLocalSetTCP,
}, {
JumpChain: string(KubeMarkMasqChain), MatchSet: "",
JumpChain: string(KubeMarkMasqChain), MatchSet: kubeNodePortSetTCP,
}},
}
checkIptables(t, ipt, epIpt)