Validate restart policy. Fixes #14351

Signed-off-by: Lei Jitang <leijitang@huawei.com>

runconfig/parse.go

@@ -428,12 +428,15 @@ func ParseRestartPolicy(policy string) (RestartPolicy, error) {
 	p.Name = name
 	switch name {
 	case "always":
-		if len(parts) == 2 {
+		if len(parts) > 1 {
 			return p, fmt.Errorf("maximum restart count not valid with restart policy of \"always\"")
 		}
 	case "no":
 		// do nothing
 	case "on-failure":
+		if len(parts) > 2 {
+			return p, fmt.Errorf("restart count format is not valid, usage: 'on-failure:N' or 'on-failure'")
+		}
 		if len(parts) == 2 {
 			count, err := strconv.Atoi(parts[1])
 			if err != nil {

runconfig/parse_test.go

@@ -456,12 +456,13 @@ func TestParseRestartPolicy(t *testing.T) {
 	invalids := map[string]string{
 		"something":          "invalid restart policy something",
 		"always:2":           "maximum restart count not valid with restart policy of \"always\"",
+		"always:2:3":         "maximum restart count not valid with restart policy of \"always\"",
 		"on-failure:invalid": `strconv.ParseInt: parsing "invalid": invalid syntax`,
+		"on-failure:2:5":     "restart count format is not valid, usage: 'on-failure:N' or 'on-failure'",
 	}
 	valids := map[string]RestartPolicy{
 		"": {},
-		// FIXME This feels not right
-		"always:1:2": {
+		"always": {
 			Name:              "always",
 			MaximumRetryCount: 0,
 		},
@@ -469,11 +470,6 @@ func TestParseRestartPolicy(t *testing.T) {
 			Name:              "on-failure",
 			MaximumRetryCount: 1,
 		},
-		// FIXME This doesn't feel right
-		"on-failure:1:2": {
-			Name:              "on-failure",
-			MaximumRetryCount: 0,
-		},
 	}
 	for restart, expectedError := range invalids {
 		if _, _, _, err := parseRun([]string{fmt.Sprintf("--restart=%s", restart), "img", "cmd"}); err == nil || err.Error() != expectedError {