diff --git a/chassis/chassis.py b/chassis/chassis.py
index c80155d..b48fad1 100644
--- a/chassis/chassis.py
+++ b/chassis/chassis.py
@@ -19,4 +19,140 @@ def init_logger():
 
 
 def init_sentry():
-    return SentryReporter()
\ No newline at end of file
+    return SentryReporter()
+
+
+
+class ConstError(TypeError):
+    pass
+
+
+class _const:
+    def __setattr__(self, name, value):
+        if name in self.__dict__:
+            raise ConstError("Can't rebind const (%s)" % name)
+        if not name.isupper():
+            raise ConstError("Const must be upper.")
+        self.__dict__[name] = value
+
+
+const = _const()
+
+const.DB_CONFIG_ITEM = 'databases'
+const.DEFAULT_DB_KEY = 'default'
+const.READONLY_DB_KEY = 'readonly'
+
+const.REDIS_CONFIG_ITEM = 'redises'
+const.RD_HOST_KEY = 'host'
+const.RD_PORT_KEY = 'port'
+const.RD_DB_KEY = 'db'
+const.RD_AUTH_KEY = 'auth'
+const.RD_CHARSET_KEY = 'charset'
+const.RD_DECODE_RESPONSES = 'decode_responses'
+const.RD_PASSWORD_KEY = 'password'
+const.DEFAULT_RD_KEY = 'default'
+
+const.MQ_CONFIG_ITEM = 'mqs'
+const.MQ_ADDR = 'MQ_ADDR'
+const.MQ_PORT = 'MQ_PORT'
+const.MQ_VHOST = 'MQ_VHOST'
+const.MQ_USER = 'MQ_USER'
+const.MQ_PWD = 'MQ_PWD'
+const.DEFAULT_MQ_KEY = 'default'
+const.AGENT_MQ_KEY = 'agent'
+
+const.APP_NAME = 'app_name'
+const.LOG_PATH = 'log_path'
+const.LOG_BACKUP_COUNT = 'log_backup_count'
+const.LOG_MAX_FILE_SIZE = 'log_max_filesize'
+
+const.REQUEST_START_SIGNAL = 'request_start'
+const.REQUEST_FINISHED_SIGNAL = 'request_finished'
+
+const.NW_SALT = 'nw'
+const.ALY_SALT = 'aly'
+const.TX_SALT = 'tx'
+const.SG_SALT = 'sg'
+const.DEFAULT_SALT = 'default'
+const.SALT_API = 'salt_api'
+const.SALT_USER = 'salt_username'
+const.SALT_PW = 'salt_password'
+const.SALT_OUT = 'salt_timeout'
+
+const.NW_INCEPTION = 'nw'
+const.ALY_INCEPTION = 'aly'
+const.TX_INCEPTION = 'tx'
+const.DEFAULT_INCEPTION = 'default'
+
+const.REGION = "cn-hangzhou"
+const.PRODUCT_NAME = "Dysmsapi"
+const.DOMAIN = "dysmsapi.aliyuncs.com"
+
+# app settings
+const.APP_SETTINGS = 'APP_SETTINGS'
+# all user info
+const.USERS_INFO = 'USERS_INFO'
+# API GW
+const.WEBSITE_API_GW_URL = 'api_gw'
+const.API_AUTH_KEY = 'settings_auth_key'
+const.EMAILLOGIN_DOMAIN = 'EMAILLOGIN_DOMAIN'
+const.EMAILLOGIN_SERVER = 'EMAILLOGIN_SERVER'
+# e-mail
+const.EMAIL_SUBJECT_PREFIX = "EMAIL_SUBJECT_PREFIX"
+const.EMAIL_HOST = "EMAIL_HOST"
+const.EMAIL_PORT = "EMAIL_PORT"
+const.EMAIL_HOST_USER = "EMAIL_HOST_USER"
+const.EMAIL_HOST_PASSWORD = "EMAIL_HOST_PASSWORD"
+const.EMAIL_USE_SSL = "EMAIL_USE_SSL"
+const.EMAIL_USE_TLS = "EMAIL_USE_TLS"
+
+# 短信配置
+const.SMS_REGION = "SMS_REGION"
+const.SMS_PRODUCT_NAME = "SMS_PRODUCT_NAME"
+const.SMS_DOMAIN = "SMS_DOMAIN"
+
+const.SMS_ACCESS_KEY_ID = 'SMS_ACCESS_KEY_ID'
+const.SMS_ACCESS_KEY_SECRET = 'SMS_ACCESS_KEY_SECRET'
+# 钉钉
+const.DING_TALK_WEBHOOK = "DING_TALK_WEBHOOK"
+# 存储
+const.STORAGE_REGION = "STORAGE_REGION"
+const.STORAGE_NAME = "STORAGE_NAME"
+const.STORAGE_PATH = "STORAGE_PATH"
+const.STORAGE_KEY_ID = "STORAGE_KEY_ID"
+const.STORAGE_KEY_SECRET = "STORAGE_KEY_SECRET"
+
+# LDAP
+const.LDAP_SERVER_HOST = "LDAP_SERVER_HOST"
+const.LDAP_SERVER_PORT = "LDAP_SERVER_PORT"
+const.LDAP_ADMIN_DN = "LDAP_ADMIN_DN"
+const.LDAP_ADMIN_PASSWORD = "LDAP_ADMIN_PASSWORD"
+const.LDAP_SEARCH_BASE = "LDAP_SEARCH_BASE"
+const.LDAP_SEARCH_FILTER = "LDAP_SEARCH_FILTER"
+const.LDAP_ATTRIBUTES = "LDAP_ATTRIBUTES"
+const.LDAP_USE_SSL = "LDAP_USE_SSL"
+const.LDAP_ENABLE = "LDAP_ENABLE"
+
+# token 超时时间
+const.TOKEN_EXP_TIME = "TOKEN_EXP_TIME"
+
+# 全局 二次认证
+const.MFA_GLOBAL = 'MFA_GLOBAL'
+
+# 任务状态
+const.STATE_NEW = '0'
+const.STATE_WAIT = '1'
+const.STATE_RUNNING = '2'
+const.STATE_SUCCESS = '3'
+const.STATE_ERROR = '4'
+const.STATE_MANUAL = '5'
+const.STATE_BREAK = '6'
+const.STATE_TIMING = '7'
+const.STATE_UNKNOWN = '8'
+const.STATE_FAIL = '9'
+const.STATE_IGNORE = '10'  ## 忽略
+const.EXEC_TIMEOUT = 1800
+
+# 节点地址
+const.NODE_ADDRESS = 'NODE_ADDRESS'
+const.EXEC_NODE_MAP_KEY = 'EXEC_NODE_MAP_KEY'