Added config enable=true/false for extensions with default value as enabled closes #258

Signed-off-by: Alexei Dodon <adodon@cisco.com>

examples/README.md

@@ -388,7 +388,7 @@ Configure each registry sync:
 				"pollInterval": "6h",               # polling interval, if not set then periodically polling will not run
 				"tlsVerify": true,                  # whether or not to verify tls (default is true)
 				"certDir": "/home/user/certs",      # use certificates at certDir path, if not specified then use the default certs dir
-        "maxRetries": 5,                    # mandatory option! maxRetries in case of temporary errors
+				"maxRetries": 5,                    # mandatory option! maxRetries in case of temporary errors
 				"retryDelay": "10m",                # mandatory option! delay between retries, retry options are applied for both on demand and periodically sync.
 				"content":[                         # which content to periodically pull, also it's used for filtering ondemand images, if not set then periodically polling will not run
 					{
@@ -401,7 +401,7 @@ Configure each registry sync:
 					{
 						"prefix":"/repo2/repo*"         # pull all images that matches repo2/repo.*
 					},
-          {
+					{
 						"prefix":"/repo3/**"            # pull all images under repo3/ (matches recursively all repos under repo3/)
 					}
 				]
@@ -411,7 +411,7 @@ Configure each registry sync:
 				"pollInterval": "12h",
 				"tlsVerify": false,
 				"onDemand": false,
-        "maxRetries": 5,
+				"maxRetries": 5,
 				"retryDelay": "10m",
 				"content":[
 					{
@@ -426,8 +426,8 @@ Configure each registry sync:
 				"urls": ["https://docker.io/library"],
 				"onDemand": true,                     # doesn't have content, don't periodically pull, pull just on demand.
 				"tlsVerify": true,
-        "maxRetries": 3,                      
-        "retryDelay": "15m"
+				"maxRetries": 3,
+				"retryDelay": "15m"
 			}
 		]
 		}

examples/config-allextensions.json

@@ -0,0 +1,46 @@
+{
+	"version": "0.1.0-dev",
+	"storage": {
+		"rootDirectory": "/tmp/zot"
+	},
+	"http": {
+		"address": "127.0.0.1",
+		"port": "8080"
+	},
+	"log": {
+		"level": "debug"
+	},
+	"extensions": {
+		"metrics": {
+		},
+		"sync": {
+			"credentialsFile": "./examples/sync-auth-filepath.json",
+			"registries": [{
+				"urls": ["https://registry1:5000"],
+				"onDemand": false,
+				"pollInterval": "6h",
+				"tlsVerify": true,
+				"certDir": "/home/user/certs",
+				"maxRetries": 3,
+				"retryDelay": "15m",
+				"content":[
+					{
+						"prefix":"/repo1/repo",
+						"tags":{
+							"regex":"4.*",
+							"semver":true
+						}
+					},
+					{
+						"prefix":"/repo2/repo"
+					}
+				]
+			}]
+		},
+		"search": {
+			"cve": {
+				"updateInterval": "2h"
+			}
+		}
+	}
+}

examples/config-sync.json

@@ -12,6 +12,7 @@
 	},
 	"extensions":{
 		"sync": {
+			"enable": true,
 			"credentialsFile": "./examples/sync-auth-filepath.json",
 			"registries": [{
 				"urls": ["https://registry1:5000"],