Enable configuring the interval of clair updaters

To mitigate the impact we saw in the updater issues in clair, this
commit enable configuring the interval, include disabling the updaters
of clair.

make/common/templates/clair/config.yaml

@@ -16,7 +16,7 @@ clair:
     # Deadline before an API request will respond with a 503
     timeout: 300s
   updater:
-    interval: 12h
+    interval: ${interval}h
 
   notifier:
     attempts: 3

make/harbor.cfg

@@ -148,20 +148,19 @@ redis_url = redis:6379
 
 #Clair DB host address. Only change it when using an exteral DB.
 clair_db_host = postgresql
-
 #The password of the Clair's postgres database. Only effective when Harbor is deployed with Clair.
 #Please update it before deployment. Subsequent update will cause Clair's API server and Harbor unable to access Clair's database.
 clair_db_password = root123
-
 #Clair DB connect port
 clair_db_port = 5432
-
 #Clair DB username
 clair_db_username = postgres
-
 #Clair default database
 clair_db = postgres
 
+#The interval of clair updaters, the unit is hour, set to 0 to disable the updaters.
+clair_updaters_interval = 12
+
 ##########End of Clair DB configuration############
 
 #The following attributes only need to be set when auth mode is uaa_auth

make/prepare

@@ -270,6 +270,7 @@ clair_db_host = rcp.get("configuration", "clair_db_host")
 clair_db_port = rcp.get("configuration", "clair_db_port")
 clair_db_username = rcp.get("configuration", "clair_db_username")
 clair_db = rcp.get("configuration", "clair_db")
+clair_updaters_interval = rcp.get("configuration", "clair_updaters_interval")
 
 uaa_endpoint = rcp.get("configuration", "uaa_endpoint")
 uaa_clientid = rcp.get("configuration", "uaa_clientid")
@@ -641,7 +642,8 @@ if args.clair_mode:
             username = clair_db_username,
             host = clair_db_host,
             port = clair_db_port,
-            dbname = clair_db)
+            dbname = clair_db,
+            interval = clair_updaters_interval)
 
 # config http proxy for Clair
     http_proxy = rcp.get("configuration", "http_proxy").strip()