Add restart function / options change (#1242)

API.md

@@ -771,6 +771,8 @@ return:
 }
 ```
 
+- POST `/dns/restart`
+
 - GET `/dns/logs`
 
 - GET `/dns/stats`

hassio/api/__init__.py

@@ -278,6 +278,7 @@ class RestAPI(CoreSysAttributes):
                 web.get("/dns/logs", api_dns.logs),
                 web.post("/dns/update", api_dns.update),
                 web.post("/dns/options", api_dns.options),
+                web.post("/dns/restart", api_dns.restart),
             ]
         )
 

hassio/api/dns.py

@@ -54,6 +54,7 @@ class APICoreDNS(CoreSysAttributes):
 
         if ATTR_SERVERS in body:
             self.sys_dns.servers = body[ATTR_SERVERS]
+            self.sys_create_task(self.sys_dns.restart())
 
         self.sys_dns.save_data()
 
@@ -87,3 +88,8 @@ class APICoreDNS(CoreSysAttributes):
     def logs(self, request: web.Request) -> Awaitable[bytes]:
         """Return DNS Docker logs."""
         return self.sys_dns.logs()
+
+    @api_process
+    def restart(self, request: web.Request) -> Awaitable[None]:
+        """Restart CoreDNS plugin."""
+        return asyncio.shield(self.sys_dns.restart())