diff --git a/docker/environment/cluster_worker.py b/docker/environment/cluster_worker.py
index d3940ef0b5f..2491ce68e1c 100644
--- a/docker/environment/cluster_worker.py
+++ b/docker/environment/cluster_worker.py
@@ -20,7 +20,7 @@ class ClusterWorkerConfigurator:
     def tweak_config(self, cfg, uid):
         return cfg
 
-    def configure_started_instance(self, bindir, instance, config, os_config, output):
+    def configure_started_instance(self, bindir, instance, config, output):
         pass
 
     def extra_volumes(self, config):
diff --git a/docker/environment/provider_worker.py b/docker/environment/provider_worker.py
index 76a9faa8554..36061b56487 100644
--- a/docker/environment/provider_worker.py
+++ b/docker/environment/provider_worker.py
@@ -25,13 +25,15 @@ def tweak_config(self, cfg, uid):
             sys_config['global_registry_domain'] = gr_hostname
         return cfg
 
-    def configure_started_instance(self, bindir, instance, config, os_config, output):
-        create_storages(config['os_configs'][os_config]['storages'],
-                        output[self.nodes_list_attribute()],
-                        config[self.domains_attribute()][instance][self.app_name()], bindir)
+    def configure_started_instance(self, bindir, instance, config, output):
+        if 'os_config' in config[self.domains_attribute()][instance]:
+            os_config = config[self.domains_attribute()][instance]['os_config']
+            create_storages(config['os_configs'][os_config]['storages'],
+                            output[self.nodes_list_attribute()],
+                            config[self.domains_attribute()][instance][self.app_name()], bindir)
 
     def extra_volumes(self, config):
-        return [common.volume_for_storage(s) for s in config['os_config']['storages']]
+        return [common.volume_for_storage(s) for s in config['os_config']['storages']] if 'os_config' in config else []
 
     def app_name(self):
         return "op_worker"
diff --git a/docker/environment/worker.py b/docker/environment/worker.py
index 0fe150c7879..57dd8855473 100644
--- a/docker/environment/worker.py
+++ b/docker/environment/worker.py
@@ -102,9 +102,10 @@ def _node_up(image, bindir, config, dns_servers, db_node_mappings, logdir, confi
         dns_list=dns_servers,
         command=command)
 
-    # create system users and grous
-    common.create_users(container, config['os_config']['users'])
-    common.create_groups(container, config['os_config']['groups'])
+    # create system users and groups (if specified)
+    if 'os_config' in config:
+        common.create_users(container, config['os_config']['users'])
+        common.create_groups(container, config['os_config']['groups'])
 
     return container, {
         'docker_ids': [container],
@@ -168,17 +169,20 @@ def up(image, bindir, dns_server, uid, config_path, configurator, logdir=None):
 
     # Workers of every cluster are started together
     for instance in config[configurator.domains_attribute()]:
-        os_config = config[configurator.domains_attribute()][instance]['os_config']
         gen_dev_cfg = {
             'config': {
                 'input_dir': input_dir,
                 'target_dir': '/root/bin'
             },
             'nodes': config[configurator.domains_attribute()][instance][configurator.app_name()],
-            'db_driver': _db_driver(config[configurator.domains_attribute()][instance]),
-            'os_config': config['os_configs'][os_config]
+            'db_driver': _db_driver(config[configurator.domains_attribute()][instance])
         }
 
+        # If present, include os_config
+        if 'os_config' in config[configurator.domains_attribute()][instance]:
+            os_config = config[configurator.domains_attribute()][instance]['os_config']
+            gen_dev_cfg['os_config'] = config['os_configs'][os_config]
+
         # Tweak configs, retrieve lis of riak nodes to start
         configs = []
         all_db_nodes = []
@@ -224,8 +228,8 @@ def up(image, bindir, dns_server, uid, config_path, configurator, logdir=None):
             }
         }
         common.merge(output, domains)
-        configurator.configure_started_instance(bindir, instance, config, os_config, output)
+        configurator.configure_started_instance(bindir, instance, config, output)
 
     # Make sure domains are added to the dns server.
     dns.maybe_restart_with_configuration(dns_server, uid, output)
-    return output
\ No newline at end of file
+    return output