Remove exec arg from utilipset.New

Historically it took an exec argument so you could pass a FakeExec to
mock its behavior in unit tests, but it has a fake implementation now
that is much more useful for unit tests than trying to use the real
implementation with a fake exec. (The unit tests still use fake execs,
but they don't need to use a public constructor.) So remove the exec
args from the public constructors.

cmd/kube-proxy/app/server_linux.go

@@ -217,8 +217,7 @@ func (s *ProxyServer) createProxier(ctx context.Context, config *proxyconfigapi.
 			return nil, fmt.Errorf("unable to create proxier: %v", err)
 		}
 	} else if config.Mode == proxyconfigapi.ProxyModeIPVS {
-		execer := exec.New()
+		ipsetInterface := utilipset.New()
-		ipsetInterface := utilipset.New(execer)
 		ipvsInterface := utilipvs.New()
 		if err := ipvs.CanUseIPVSProxier(ctx, ipvsInterface, ipsetInterface, config.IPVS.Scheduler); err != nil {
 			return nil, fmt.Errorf("can't use the IPVS proxier: %v", err)
@@ -511,8 +510,7 @@ func platformCleanup(ctx context.Context, mode proxyconfigapi.ProxyMode, cleanup
 	// Clean up iptables and ipvs rules if switching to nftables, or if cleanupAndExit
 	if !isIPTablesBased(mode) || cleanupAndExit {
 		ipts, _ := getIPTables(v1.IPFamilyUnknown)
-		execer := exec.New()
+		ipsetInterface := utilipset.New()
-		ipsetInterface := utilipset.New(execer)
 		ipvsInterface := utilipvs.New()
 
 		for _, ipt := range ipts {

pkg/proxy/ipvs/ipset/ipset.go

@@ -278,9 +278,9 @@ type runner struct {
 }
 
 // New returns a new Interface which will exec ipset.
-func New(exec utilexec.Interface) Interface {
+func New() Interface {
 	return &runner{
-		exec: exec,
+		exec: utilexec.New(),
 	}
 }
 

pkg/proxy/ipvs/ipset/ipset_test.go

@@ -28,6 +28,10 @@ import (
 	fakeexec "k8s.io/utils/exec/testing"
 )
 
+func newInternal(fexec *fakeexec.FakeExec) Interface {
+	return &runner{fexec}
+}
+
 func TestCheckIPSetVersion(t *testing.T) {
 	testCases := []struct {
 		vstring string
@@ -83,7 +87,7 @@ func TestFlushSet(t *testing.T) {
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Success.
 	err := runner.FlushSet("FOOBAR")
 	if err != nil {
@@ -119,7 +123,7 @@ func TestDestroySet(t *testing.T) {
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Success
 	err := runner.DestroySet("FOOBAR")
 	if err != nil {
@@ -153,7 +157,7 @@ func TestDestroyAllSets(t *testing.T) {
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Success
 	err := runner.DestroyAllSets()
 	if err != nil {
@@ -198,7 +202,7 @@ func TestCreateSet(t *testing.T) {
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Create with ignoreExistErr = false, expect success
 	err := runner.CreateSet(&testSet, false)
 	if err != nil {
@@ -388,7 +392,7 @@ func TestAddEntry(t *testing.T) {
 				func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 			},
 		}
-		runner := New(fexec)
+		runner := newInternal(fexec)
 		// Create with ignoreExistErr = false, expect success
 		err := runner.AddEntry(testCases[i].entry.String(), testCases[i].set, false)
 		if err != nil {
@@ -437,7 +441,7 @@ func TestDelEntry(t *testing.T) {
 				func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 			},
 		}
-		runner := New(fexec)
+		runner := newInternal(fexec)
 
 		err := runner.DelEntry(testCases[i].entry.String(), testCases[i].set.Name)
 		if err != nil {
@@ -482,7 +486,7 @@ func TestTestEntry(t *testing.T) {
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Success
 	ok, err := runner.TestEntry(testEntry.String(), setName)
 	if err != nil {
@@ -530,7 +534,7 @@ func TestTestEntryIPv6(t *testing.T) {
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Success
 	ok, err := runner.TestEntry(testEntry.String(), setName)
 	if err != nil {
@@ -604,7 +608,7 @@ Members:
 				},
 			},
 		}
-		runner := New(fexec)
+		runner := newInternal(fexec)
 		// Success
 		entries, err := runner.ListEntries("foobar")
 		if err != nil {
@@ -643,7 +647,7 @@ baz`
 			func(cmd string, args ...string) exec.Cmd { return fakeexec.InitFakeCmd(&fcmd, cmd, args...) },
 		},
 	}
-	runner := New(fexec)
+	runner := newInternal(fexec)
 	// Success
 	list, err := runner.ListSets()
 	if err != nil {