ore azure: add ability to tag images

Add ability to tag images to facilate resource management.

mantle/cmd/ore/azure/tag-blob.go

@@ -0,0 +1,98 @@
+// Copyright 2022 Red Hat
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package azure
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+)
+
+var (
+	cmdTagBlob = &cobra.Command{
+		Use:   "tag-blob",
+		Short: "Tag a Azure storage blob",
+		Long:  "tag a storage blob on Azure.",
+		Run:   runSetMetadata,
+	}
+
+	bmo struct {
+		tags          []string
+		storageacct   string
+		container     string
+		blob          string
+		resourceGroup string
+	}
+)
+
+func init() {
+	sv := cmdTagBlob.Flags().StringVar
+	ssv := cmdTagBlob.Flags().StringSliceVar
+	sv(&bmo.storageacct, "storage-account", "kola", "storage account name")
+	sv(&bmo.container, "container", "vhds", "container name")
+	sv(&bmo.blob, "blob-name", "", "name of the blob")
+	sv(&bmo.resourceGroup, "resource-group", "kola", "resource group name")
+	ssv(&bmo.tags, "tags", []string{}, "list of key=value tags to attach to the Azure storage blob")
+	Azure.AddCommand(cmdTagBlob)
+}
+
+func runSetMetadata(cmd *cobra.Command, args []string) {
+	if bmo.blob == "" {
+		fmt.Fprintf(os.Stderr, "Provide --blob-name to tag\n")
+		os.Exit(1)
+	}
+
+	if len(bmo.tags) < 1 {
+		fmt.Fprintf(os.Stderr, "Provide --tag to tag\n")
+		os.Exit(1)
+	}
+
+	if err := api.SetupClients(); err != nil {
+		fmt.Fprintf(os.Stderr, "setting up clients: %v\n", err)
+		os.Exit(1)
+	}
+
+	kr, err := api.GetStorageServiceKeys(bmo.storageacct, bmo.resourceGroup)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "Fetching storage service keys failed: %v\n", err)
+		os.Exit(1)
+	}
+
+	if len(kr.Keys) == 0 {
+		fmt.Fprintf(os.Stderr, "No storage service keys found")
+		os.Exit(1)
+	}
+	k := kr.Keys
+	key := k[0].Value
+
+	tagMap := make(map[string]*string)
+	for _, tag := range bmo.tags {
+		splitTag := strings.SplitN(tag, "=", 2)
+		if len(splitTag) != 2 {
+			fmt.Fprintf(os.Stderr, "invalid tag format; should be key=value, not %v\n", tag)
+			os.Exit(1)
+		}
+		key, value := splitTag[0], splitTag[1]
+		tagMap[key] = &value
+	}
+
+	err = api.SetBlobMetadata(bmo.storageacct, *key, bmo.container, bmo.blob, tagMap)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "couldn't create image tags: %v", err)
+		os.Exit(1)
+	}
+}

mantle/platform/api/azure/storage.go

@@ -174,6 +174,16 @@ func (a *API) DeleteBlockBlob(storageaccount, key, container, blob string) error
 	return err
 }
 
+func (a *API) SetBlobMetadata(storageaccount, key, container, blobname string, tags map[string]*string) error {
+	client, err := getPageBlobClient(storageaccount, key, container, blobname)
+	if err != nil {
+		return err
+	}
+
+	_, err = client.SetMetadata(context.Background(), tags, nil)
+	return err
+}
+
 func getBlockBlobClient(storageaccount, key string) (*azblob.Client, error) {
 	serviceURL := fmt.Sprintf("https://%s.blob.core.windows.net/", storageaccount)
 	cred, err := azblob.NewSharedKeyCredential(storageaccount, key)