Bump minimum docker version to 1.13.1 in kubeadm

Author: chenzhiwei

cmd/kubeadm/app/util/system/docker_validator_test.go

@@ -28,7 +28,7 @@ func TestValidateDockerInfo(t *testing.T) {
 		Reporter: DefaultReporter,
 	}
 	spec := &DockerSpec{
-		Version:     []string{`1\.1[1-3]\..*`, `17\.0[3,6,9]\..*`, `18\.0[6,9]\..*`},
+		Version:     []string{`1\.13\..*`, `17\.0[3,6,9]\..*`, `18\.0[6,9]\..*`},
 		GraphDriver: []string{"driver_1", "driver_2"},
 	}
 	for _, test := range []struct {
@@ -38,32 +38,20 @@ func TestValidateDockerInfo(t *testing.T) {
 		warn bool
 	}{
 		{
-			name: "unsupported Docker version 1.10.1",
-			info: types.Info{Driver: "driver_1", ServerVersion: "1.10.1"},
+			name: "unsupported Docker version 1.12.1",
+			info: types.Info{Driver: "driver_2", ServerVersion: "1.12.1"},
 			err:  true,
 			warn: false,
 		},
 		{
 			name: "unsupported driver",
-			info: types.Info{Driver: "bad_driver", ServerVersion: "1.11.1"},
+			info: types.Info{Driver: "bad_driver", ServerVersion: "1.13.1"},
 			err:  true,
 			warn: false,
 		},
-		{
-			name: "valid Docker version 1.11.1",
-			info: types.Info{Driver: "driver_1", ServerVersion: "1.11.1"},
-			err:  false,
-			warn: false,
-		},
-		{
-			name: "valid Docker version 1.12.1",
-			info: types.Info{Driver: "driver_2", ServerVersion: "1.12.1"},
-			err:  false,
-			warn: false,
-		},
 		{
 			name: "valid Docker version 1.13.1",
-			info: types.Info{Driver: "driver_2", ServerVersion: "1.13.1"},
+			info: types.Info{Driver: "driver_1", ServerVersion: "1.13.1"},
 			err:  false,
 			warn: false,
 		},