cri: add deprecation warning for configs

Signed-off-by: Samuel Karp <samuelkarp@google.com>

pkg/cri/config/config.go

@@ -401,6 +401,11 @@ func ValidatePluginConfig(ctx context.Context, c *PluginConfig) ([]deprecation.W
 		log.G(ctx).Warning("`mirrors` is deprecated, please use `config_path` instead")
 	}
 
+	if len(c.Registry.Configs) != 0 {
+		warnings = append(warnings, deprecation.CRIRegistryConfigs)
+		log.G(ctx).Warning("`configs` is deprecated, please use `config_path` instead")
+	}
+
 	// Validation for deprecated auths options and mapping it to configs.
 	if len(c.Registry.Auths) != 0 {
 		if c.Registry.Configs == nil {

pkg/cri/config/config_test.go

@@ -147,6 +147,45 @@ func TestValidateConfig(t *testing.T) {
 			},
 			warnings: []deprecation.Warning{deprecation.CRIRegistryMirrors},
 		},
+		"deprecated configs": {
+			config: &PluginConfig{
+				ContainerdConfig: ContainerdConfig{
+					DefaultRuntimeName: RuntimeDefault,
+					Runtimes: map[string]Runtime{
+						RuntimeDefault: {},
+					},
+				},
+				Registry: Registry{
+					Configs: map[string]RegistryConfig{
+						"gcr.io": {
+							Auth: &AuthConfig{
+								Username: "test",
+							},
+						},
+					},
+				},
+			},
+			expected: &PluginConfig{
+				ContainerdConfig: ContainerdConfig{
+					DefaultRuntimeName: RuntimeDefault,
+					Runtimes: map[string]Runtime{
+						RuntimeDefault: {
+							Sandboxer: string(ModePodSandbox),
+						},
+					},
+				},
+				Registry: Registry{
+					Configs: map[string]RegistryConfig{
+						"gcr.io": {
+							Auth: &AuthConfig{
+								Username: "test",
+							},
+						},
+					},
+				},
+			},
+			warnings: []deprecation.Warning{deprecation.CRIRegistryConfigs},
+		},
 		"privileged_without_host_devices_all_devices_allowed without privileged_without_host_devices": {
 			config: &PluginConfig{
 				ContainerdConfig: ContainerdConfig{

pkg/deprecation/deprecation.go

@@ -29,6 +29,8 @@ const (
 	CRIRegistryMirrors Warning = Prefix + "cri-registry-mirrors"
 	// CRIRegistryAuths is a warning for the use of the `auths` property
 	CRIRegistryAuths Warning = Prefix + "cri-registry-auths"
+	// CRIRegistryConfigs is a warning for the use of the `configs` property
+	CRIRegistryConfigs Warning = Prefix + "cri-registry-configs"
 )
 
 var messages = map[Warning]string{
@@ -39,6 +41,8 @@ var messages = map[Warning]string{
 		"Use `config_path` instead.",
 	CRIRegistryAuths: "The `auths` property of `[plugins.\"io.containerd.grpc.v1.cri\".registry]` is deprecated since containerd v1.3 and will be removed in containerd v2.0." +
 		"Use `ImagePullSecrets` instead.",
+	CRIRegistryConfigs: "The `configs` property of `[plugins.\"io.containerd.grpc.v1.cri\".registry]` is deprecated since containerd v1.5 and will be removed in containerd v2.0." +
+		"Use `config_path` instead.",
 }
 
 // Valid checks whether a given Warning is valid