diff --git a/ucloud/host/virtualmachine.py b/ucloud/host/virtualmachine.py
index 7524083..33e4433 100755
--- a/ucloud/host/virtualmachine.py
+++ b/ucloud/host/virtualmachine.py
@@ -22,7 +22,7 @@ from ucloud.common.helpers import get_ipv6_address
 from ucloud.common.request import RequestEntry, RequestType
 from ucloud.common.vm import VMEntry, VMStatus
 from ucloud.config import (etcd_client, request_pool,
-                           running_vms, vm_pool, env_vars,
+                           running_vms, vm_pool, config,
                            image_storage_handler)
 from . import qmp
 from ucloud.host import logger
@@ -46,7 +46,7 @@ def delete_network_interface(iface):
 
 
 def resolve_network(network_name, network_owner):
-    network = etcd_client.get(join_path(env_vars.get("NETWORK_PREFIX"),
+    network = etcd_client.get(join_path(config['etcd']["NETWORK_PREFIX"],
                                         network_owner,
                                         network_name),
                               value_in_json=True)
@@ -179,7 +179,7 @@ def get_start_command_args(vm_entry, vnc_sock_filename: str, migration=False, mi
     for network_mac_and_tap in vm_networks:
         network_name, mac, tap = network_mac_and_tap
 
-        _key = os.path.join(env_vars.get('NETWORK_PREFIX'), vm_entry.owner, network_name)
+        _key = os.path.join(config['etcd']['NETWORK_PREFIX'], vm_entry.owner, network_name)
         network = etcd_client.get(_key, value_in_json=True)
         network_type = network.value["type"]
         network_id = str(network.value["id"])
@@ -187,7 +187,7 @@ def get_start_command_args(vm_entry, vnc_sock_filename: str, migration=False, mi
 
         if network_type == "vxlan":
             tap = create_vxlan_br_tap(_id=network_id,
-                                      _dev=env_vars.get("VXLAN_PHY_DEV"),
+                                      _dev=config['etcd']["VXLAN_PHY_DEV"],
                                       tap_id=tap,
                                       ip=network_ipv6)
             update_radvd_conf(etcd_client)
@@ -303,13 +303,13 @@ def transfer(request_event):
     _host, _port = request_event.parameters["host"], request_event.parameters["port"]
     _uuid = request_event.uuid
     _destination = request_event.destination_host_key
-    vm = get_vm(running_vms, join_path(env_vars.get('VM_PREFIX'), _uuid))
+    vm = get_vm(running_vms, join_path(config['etcd']['VM_PREFIX'], _uuid))
 
     if vm:
         tunnel = sshtunnel.SSHTunnelForwarder(
             _host,
-            ssh_username=env_vars.get("ssh_username"),
-            ssh_pkey=env_vars.get("ssh_pkey"),
+            ssh_username=config['ssh']["ssh_username"],
+            ssh_pkey=config['ssh']["SSH_PRIVATEKEY"],
             remote_bind_address=("127.0.0.1", _port),
             ssh_proxy_enabled=True,
             ssh_proxy=(_host, 22)
@@ -373,7 +373,7 @@ def launch_vm(vm_entry, migration=False, migration_port=None, destination_host_k
                 parameters={"host": get_ipv6_address(), "port": migration_port},
                 uuid=vm_entry.uuid,
                 destination_host_key=destination_host_key,
-                request_prefix=env_vars.get("REQUEST_PREFIX")
+                request_prefix=config['etcd']["REQUEST_PREFIX"]
             )
             request_pool.put(r)
         else: