[#1614] adm/frostfsid: Add 'delete-kv'

Signed-off-by: Alexander Chuprov <a.chuprov@yadro.com>

cmd/frostfs-adm/internal/modules/morph/frostfsid/frostfsid.go

@@ -167,6 +167,14 @@ var (
 		},
 		Run: frostfsidSetKV,
 	}
+	frostfsidDeleteKVCmd = &cobra.Command{
+		Use:   "delete-kv",
+		Short: "Delete a value from the subject's KV storage",
+		PreRun: func(cmd *cobra.Command, _ []string) {
+			_ = viper.BindPFlag(commonflags.EndpointFlag, cmd.Flags().Lookup(commonflags.EndpointFlag))
+		},
+		Run: frostfsidDeleteKV,
+	}
 )
 
 func initFrostfsIDCreateNamespaceCmd() {
@@ -271,6 +279,24 @@ func initFrostfsIDSetKVCmd() {
 	})
 }
 
+func initFrostfsIDDeleteKVCmd() {
+	Cmd.AddCommand(frostfsidDeleteKVCmd)
+	frostfsidDeleteKVCmd.Flags().StringP(commonflags.EndpointFlag, commonflags.EndpointFlagShort, "", commonflags.EndpointFlagDesc)
+	frostfsidDeleteKVCmd.Flags().String(subjectAddressFlag, "", "Subject address")
+	frostfsidDeleteKVCmd.Flags().String(keyFlag, "", keyDescFlag)
+
+	frostfsidDeleteKVCmd.ValidArgsFunction = commonflags.AutoCompleteFlags
+
+	_ = frostfsidDeleteKVCmd.RegisterFlagCompletionFunc(keyFlag, func(_ *cobra.Command, _ []string, _ string) ([]string, cobra.ShellCompDirective) {
+		flags := make([]string, 0, len(wellKnownFlags))
+		for k := range wellKnownFlags {
+			flags = append(flags, k)
+		}
+
+		return flags, cobra.ShellCompDirectiveDefault
+	})
+}
+
 func frostfsidCreateNamespace(cmd *cobra.Command, _ []string) {
 	ns := getFrostfsIDNamespace(cmd)
 
@@ -469,6 +495,25 @@ func frostfsidSetKV(cmd *cobra.Command, _ []string) {
 	commonCmd.ExitOnErr(cmd, "failed to set: %w", err)
 }
 
+func frostfsidDeleteKV(cmd *cobra.Command, _ []string) {
+	subjectAddress := getFrostfsIDSubjectAddress(cmd)
+	key, _ := cmd.Flags().GetString(keyFlag)
+
+	if key == "" {
+		commonCmd.ExitOnErr(cmd, "", errors.New("key can't be empty"))
+	}
+
+	ffsid, err := newFrostfsIDClient(cmd)
+	commonCmd.ExitOnErr(cmd, "init contract client: %w", err)
+
+	method, args := ffsid.roCli.DeleteSubjectKVCall(subjectAddress, key)
+
+	ffsid.addCall(method, args)
+
+	err = ffsid.sendWait()
+	commonCmd.ExitOnErr(cmd, "failed to delete: %w", err)
+}
+
 func frostfsidListGroupSubjects(cmd *cobra.Command, _ []string) {
 	ns := getFrostfsIDNamespace(cmd)
 	groupID := getFrostfsIDGroupID(cmd)

cmd/frostfs-adm/internal/modules/morph/frostfsid/root.go

@@ -13,6 +13,7 @@ func init() {
 	initFrostfsIDRemoveSubjectFromGroupCmd()
 	initFrostfsIDListGroupSubjectsCmd()
 	initFrostfsIDSetKVCmd()
+	initFrostfsIDDeleteKVCmd()
 	initFrostfsIDAddSubjectKeyCmd()
 	initFrostfsIDRemoveSubjectKeyCmd()
 }