fix: Database_observability: add Azure provider relabeling rules (#5372)

### Brief description of Pull Request
Make sure that relabeling rules are applied correctly for Azure CSP
config block.

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### Issue(s) fixed by this Pull Request

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### PR Checklist

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- [ ] Documentation added
- [x] Tests updated
- [ ] Config converters updated

Author: cristiangreco

internal/component/database_observability/relabeling.go

@@ -30,13 +30,22 @@ func GetRelabelingRules(serverID string, cp *CloudProvider) []*relabel.Config {
 			rs = append(rs, &providerName, &providerRegion, &providerAccount)
 		}
 		if cp.Azure != nil {
-			// We only support Azure provider_name for now.
 			providerName := relabel.DefaultRelabelConfig
 			providerName.Replacement = "azure"
 			providerName.TargetLabel = "provider_name"
 			providerName.Action = relabel.Replace
 
-			rs = append(rs, &providerName)
+			providerRegion := relabel.DefaultRelabelConfig
+			providerRegion.Replacement = cp.Azure.ResourceGroup
+			providerRegion.TargetLabel = "provider_region"
+			providerRegion.Action = relabel.Replace
+
+			providerAccount := relabel.DefaultRelabelConfig
+			providerAccount.Replacement = cp.Azure.SubscriptionID
+			providerAccount.TargetLabel = "provider_account"
+			providerAccount.Action = relabel.Replace
+
+			rs = append(rs, &providerName, &providerRegion, &providerAccount)
 		}
 	}
 

internal/component/database_observability/relabeling_test.go

@@ -49,17 +49,27 @@ func Test_GetRelabelingRules(t *testing.T) {
 	t.Run("return relabeling rules with Azure config", func(t *testing.T) {
 		rr := GetRelabelingRules("some-server-id", &CloudProvider{
 			Azure: &AzureCloudProviderInfo{
-				ServerName: "some-resource",
+				ServerName:     "some-resource",
+				ResourceGroup:  "some-resource-group",
+				SubscriptionID: "some-subscription-id",
 			},
 		})
 
-		require.Equal(t, 2, len(rr))
+		require.Equal(t, 4, len(rr))
 		require.Equal(t, "some-server-id", rr[0].Replacement)
 		require.Equal(t, "server_id", rr[0].TargetLabel)
 		require.Equal(t, relabel.Replace, rr[0].Action)
 
 		require.Equal(t, "azure", rr[1].Replacement)
 		require.Equal(t, "provider_name", rr[1].TargetLabel)
 		require.Equal(t, relabel.Replace, rr[1].Action)
+
+		require.Equal(t, "some-resource-group", rr[2].Replacement)
+		require.Equal(t, "provider_region", rr[2].TargetLabel)
+		require.Equal(t, relabel.Replace, rr[2].Action)
+
+		require.Equal(t, "some-subscription-id", rr[3].Replacement)
+		require.Equal(t, "provider_account", rr[3].TargetLabel)
+		require.Equal(t, relabel.Replace, rr[3].Action)
 	})
 }