a735c97356
Kube-proxy's iptables mode used to care whether utiliptables's EnsureRule was able to use "iptables -C" or if it had to implement it hackily using "iptables-save". But that became irrelevant when kube-proxy was reimplemented using "iptables-restore", and no one ever noticed. So remove that check.
148 lines
4.1 KiB
Go
148 lines
4.1 KiB
Go
// +build !windows
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/*
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Copyright 2018 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package app
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import (
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"fmt"
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"testing"
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"k8s.io/kubernetes/pkg/proxy/ipvs"
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)
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type fakeIPSetVersioner struct {
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version string // what to return
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err error // what to return
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}
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func (fake *fakeIPSetVersioner) GetVersion() (string, error) {
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return fake.version, fake.err
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}
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type fakeKernelCompatTester struct {
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ok bool
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}
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func (fake *fakeKernelCompatTester) IsCompatible() error {
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if !fake.ok {
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return fmt.Errorf("error")
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}
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return nil
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}
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// fakeKernelHandler implements KernelHandler.
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type fakeKernelHandler struct {
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modules []string
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kernelVersion string
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}
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func (fake *fakeKernelHandler) GetModules() ([]string, error) {
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return fake.modules, nil
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}
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func (fake *fakeKernelHandler) GetKernelVersion() (string, error) {
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return fake.kernelVersion, nil
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}
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func Test_getProxyMode(t *testing.T) {
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var cases = []struct {
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flag string
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ipsetVersion string
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kmods []string
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kernelVersion string
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kernelCompat bool
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ipsetError error
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expected string
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}{
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{ // flag says userspace
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flag: "userspace",
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expected: proxyModeUserspace,
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},
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{ // flag says iptables, kernel not compatible
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flag: "iptables",
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kernelCompat: false,
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expected: proxyModeUserspace,
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},
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{ // flag says iptables, kernel is compatible
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flag: "iptables",
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kernelCompat: true,
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expected: proxyModeIPTables,
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},
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{ // detect, kernel not compatible
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flag: "",
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kernelCompat: false,
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expected: proxyModeUserspace,
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},
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{ // detect, kernel is compatible
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flag: "",
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kernelCompat: true,
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expected: proxyModeIPTables,
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},
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{ // flag says ipvs, ipset version ok, kernel modules installed for linux kernel before 4.19
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flag: "ipvs",
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kmods: []string{"ip_vs", "ip_vs_rr", "ip_vs_wrr", "ip_vs_sh", "nf_conntrack_ipv4"},
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kernelVersion: "4.18",
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ipsetVersion: ipvs.MinIPSetCheckVersion,
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expected: proxyModeIPVS,
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},
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{ // flag says ipvs, ipset version ok, kernel modules installed for linux kernel 4.19
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flag: "ipvs",
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kmods: []string{"ip_vs", "ip_vs_rr", "ip_vs_wrr", "ip_vs_sh", "nf_conntrack"},
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kernelVersion: "4.19",
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ipsetVersion: ipvs.MinIPSetCheckVersion,
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expected: proxyModeIPVS,
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},
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{ // flag says ipvs, ipset version too low, fallback on iptables mode
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flag: "ipvs",
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kmods: []string{"ip_vs", "ip_vs_rr", "ip_vs_wrr", "ip_vs_sh", "nf_conntrack"},
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kernelVersion: "4.19",
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ipsetVersion: "0.0",
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kernelCompat: true,
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expected: proxyModeIPTables,
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},
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{ // flag says ipvs, bad ipset version, fallback on iptables mode
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flag: "ipvs",
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kmods: []string{"ip_vs", "ip_vs_rr", "ip_vs_wrr", "ip_vs_sh", "nf_conntrack"},
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kernelVersion: "4.19",
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ipsetVersion: "a.b.c",
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kernelCompat: true,
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expected: proxyModeIPTables,
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},
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{ // flag says ipvs, required kernel modules are not installed, fallback on iptables mode
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flag: "ipvs",
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kmods: []string{"foo", "bar", "baz"},
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kernelVersion: "4.19",
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ipsetVersion: ipvs.MinIPSetCheckVersion,
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kernelCompat: true,
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expected: proxyModeIPTables,
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},
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}
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for i, c := range cases {
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kcompater := &fakeKernelCompatTester{c.kernelCompat}
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ipsetver := &fakeIPSetVersioner{c.ipsetVersion, c.ipsetError}
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khandler := &fakeKernelHandler{
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modules: c.kmods,
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kernelVersion: c.kernelVersion,
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}
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r := getProxyMode(c.flag, khandler, ipsetver, kcompater)
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if r != c.expected {
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t.Errorf("Case[%d] Expected %q, got %q", i, c.expected, r)
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}
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}
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}
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