Fix typo cloudfront updatefrenquency

Signed-off-by: Tom Hayward <thayward@infoblox.com>

docs/configuration.md

@@ -198,7 +198,7 @@ middleware:
         duration: 3000s
         ipfilteredby: awsregion
         awsregion: us-east-1, use-east-2
-        updatefrenquency: 12h
+        updatefrequency: 12h
         iprangesurl: https://ip-ranges.amazonaws.com/ip-ranges.json
   storage:
     - name: redirect
@@ -685,7 +685,7 @@ middleware:
         duration: 3000s
         ipfilteredby: awsregion
         awsregion: us-east-1, use-east-2
-        updatefrenquency: 12h
+        updatefrequency: 12h
         iprangesurl: https://ip-ranges.amazonaws.com/ip-ranges.json
 ```
 
@@ -708,7 +708,7 @@ interpretation of the options.
 | `duration` | no      | An integer and unit for the duration of the Cloudfront session. Valid time units are `ns`, `us` (or `µs`), `ms`, `s`, `m`, or `h`. For example, `3000s` is valid, but `3000 s` is not. If you do not specify a `duration` or you specify an integer without a time unit, the duration defaults to `20m` (20 minutes). |
 | `ipfilteredby` | no     | A string with the following value `none`, `aws` or `awsregion`. |
 | `awsregion` | no        | A comma separated string of AWS regions, only available when `ipfilteredby` is `awsregion`. For example, `us-east-1, us-west-2` |
-| `updatefrenquency` | no | The frequency to update AWS IP regions, default: `12h` |
+| `updatefrequency`  | no | The frequency to update AWS IP regions, default: `12h` |
 | `iprangesurl` | no      | The URL contains the AWS IP ranges information, default: `https://ip-ranges.amazonaws.com/ip-ranges.json` |
 
 

registry/storage/driver/middleware/cloudfront/middleware.go

@@ -111,16 +111,21 @@ func newCloudFrontStorageMiddleware(storageDriver storagedriver.StorageDriver, o
 		}
 	}
 
-	// parse updatefrenquency
+	// parse updatefrequency
 	updateFrequency := defaultUpdateFrequency
-	if u, ok := options["updatefrenquency"]; ok {
+	// #2447 introduced a typo. Support it for backward compatibility.
+	if _, ok := options["updatefrenquency"]; ok {
+		options["updatefrequency"] = options["updatefrenquency"]
+		dcontext.GetLogger(context.Background()).Warn("cloudfront updatefrenquency is deprecated. Please use updatefrequency")
+	}
+	if u, ok := options["updatefrequency"]; ok {
 		switch u := u.(type) {
 		case time.Duration:
 			updateFrequency = u
 		case string:
 			updateFreq, err := time.ParseDuration(u)
 			if err != nil {
-				return nil, fmt.Errorf("invalid updatefrenquency: %s", err)
+				return nil, fmt.Errorf("invalid updatefrequency: %s", err)
 			}
 			duration = updateFreq
 		}