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resource_tag.go
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resource_tag.go
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package ddcloud
import (
"fmt"
"log"
"github.com/DimensionDataResearch/go-dd-cloud-compute/compute"
"github.com/hashicorp/terraform/helper/schema"
)
const (
resourceKeyTag = "tag"
resourceKeyTagName = "name"
resourceKeyTagValue = "value"
)
func schemaTag() *schema.Schema {
return &schema.Schema{
Type: schema.TypeSet,
Optional: true,
Default: nil,
Description: "A set of tags to apply",
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
resourceKeyTagName: &schema.Schema{
Type: schema.TypeString,
Required: true,
Description: "The tag name",
},
resourceKeyTagValue: &schema.Schema{
Type: schema.TypeString,
Required: true,
Description: "The tag value",
},
},
},
Set: hashTag,
}
}
// Apply configured tags to a resource.
func applyTags(data *schema.ResourceData, apiClient *compute.Client, assetType string, providerSettings ProviderSettings) error {
var (
response *compute.APIResponseV2
err error
)
resourceID := data.Id()
log.Printf("Configuring tags for resource '%s'...", resourceID)
propertyHelper := propertyHelper(data)
configuredTags := propertyHelper.GetTags(resourceKeyTag)
tags, err := getTags(apiClient, resourceID, assetType)
if err != nil {
return err
}
// Capture any tags that are no-longer needed.
unusedTags := &schema.Set{
F: schema.HashString,
}
for _, tag := range tags {
unusedTags.Add(tag.Name)
}
for _, tag := range configuredTags {
unusedTags.Remove(tag.Name)
}
if len(configuredTags) > 0 {
log.Printf("Applying %d tags to resource '%s'...", len(configuredTags), resourceID)
response, err = apiClient.ApplyAssetTags(resourceID, assetType, configuredTags...)
if err != nil {
return err
}
if response.ResponseCode != compute.ResponseCodeOK {
return response.ToError("Failed to apply %d tags to resource:'%s' asset_type:'%s' (response code '%s'): %s", len(configuredTags), resourceID, assetType, response.ResponseCode, response.Message)
}
} else {
log.Printf("No tags need to be added to resource '%s'.", resourceID)
}
// Trim unused tags (currently-configured tags will overwrite any existing values).
if unusedTags.Len() > 0 {
unusedTagNames := make([]string, unusedTags.Len())
for index, unusedTagName := range unusedTags.List() {
unusedTagNames[index] = unusedTagName.(string)
}
log.Printf("Removing %d unused tags from resource '%s'...", len(unusedTagNames), resourceID)
response, err = apiClient.RemoveAssetTags(resourceID, assetType, unusedTagNames...)
if err != nil {
return err
}
if response.ResponseCode != compute.ResponseCodeOK {
return response.ToError("Failed to remove %d tags from resource '%s' (response code '%s'): %s", len(configuredTags), resourceID, response.ResponseCode, response.Message)
}
}
return nil
}
// Read tags from a resource and update resource data accordingly.
func readTags(data *schema.ResourceData, apiClient *compute.Client, assetType string) error {
propertyHelper := propertyHelper(data)
resourceID := data.Id()
log.Printf("Reading tags for resource '%s'...", resourceID)
tags, err := getTags(apiClient, resourceID, assetType)
if err != nil {
return err
}
log.Printf("Read %d tags for resource '%s'.", len(tags), resourceID)
propertyHelper.SetTags(resourceID, tags)
return nil
}
func hashTagName(item interface{}) int {
tagData := item.(map[string]interface{})
return schema.HashString(
tagData[resourceKeyTagName].(string),
)
}
func hashTag(item interface{}) int {
tagData := item.(map[string]interface{})
return schema.HashString(fmt.Sprintf(
"%s=%s",
tagData[resourceKeyTagName].(string),
tagData[resourceKeyTagValue].(string),
))
}
func getTags(apiClient *compute.Client, resourceID string, assetType string) (tags []compute.Tag, err error) {
page := compute.DefaultPaging()
page.PageSize = 20
var tagDetails *compute.TagDetails
for {
tagDetails, err = apiClient.GetAssetTags(resourceID, assetType, page)
if err != nil {
apiError, ok := err.(*compute.APIError)
if ok && apiError.Response.GetResponseCode() == compute.ResponseCodeUnexpectedError {
// This is due to a bug in the CloudControl API (asking for a non-existent page results in UNKNOWN_ERROR).
err = nil
break
}
return
}
if tagDetails.IsEmpty() {
break
}
for _, tagDetail := range tagDetails.Items {
tags = append(tags,
tagDetail.ToTag(),
)
}
page.Next()
}
return
}