diff --git a/src/api/v1/asset.py b/src/api/v1/asset.py
index de4b111..152a713 100644
--- a/src/api/v1/asset.py
+++ b/src/api/v1/asset.py
@@ -2,6 +2,9 @@ from flask import Blueprint
 from flask_restful import Api
 
 from controller.asset import views
+from controller.asset import instance
+from controller.asset import middleware
+from controller.asset import credential
 
 # 当前app的蓝图，以app名为前缀
 asset = Blueprint('asset', __name__, url_prefix="/asset")
@@ -11,17 +14,19 @@ api = Api(asset)
 api.add_resource(views.HostViews, '/host/', endpoint="host")
 api.add_resource(views.HostDetailViews, '/host/<string:pk>/', endpoint="host-detail")
 
-api.add_resource(views.MySQLInstanceViews, '/database/mysql/', endpoint="db-mysql")
-api.add_resource(views.MySQLInstanceDetail, '/database/mysql/<string:pk>/', endpoint="db-mysql-detail")
-# 数据实例中的库详情
-api.add_resource(views.DatabaseViews, '/database/<string:pk>/db/', endpoint="db-database")
-api.add_resource(views.DatabaseDetailViews, '/database/<string:pk>/db/<string:db>/', endpoint="db-database-detail")
+# 凭据相关视图
+api.add_resource(credential.CredentialViews, '/credential/', endpoint="cred-all")
+api.add_resource(credential.CredentialClassViews, '/credential/<string:class_name>/', endpoint="cred-cls-list")
+api.add_resource(credential.CredentialClassDetail,
+                 '/credential/<string:class_name>/<string:pk>/', endpoint="cred-cls-detail")
 
-api.add_resource(views.RedisInstanceViews, '/database/redis/', endpoint="db-redis")
-api.add_resource(views.RedisInstanceDetail, '/database/redis/<string:pk>/', endpoint="db-redis-detail")
+# 中间件相关视图
+api.add_resource(middleware.MiddlewareViews, '/middleware/', endpoint="mdw-all")
+api.add_resource(middleware.MiddlewareClassViews, '/middleware/<string:class_name>/', endpoint="mdw-cls-list")
+api.add_resource(middleware.MiddlewareClassDetail,
+                 '/middleware/<string:class_name>/<string:pk>/', endpoint="mdw-cls-detail")
 
-api.add_resource(views.NginxInstanceViews, '/middleware/nginx/', endpoint="middleware-nginx")
-api.add_resource(views.NginxInstanceDetail, '/middleware/nginx/<string:pk>/', endpoint="middleware-nginx-detail")
-
-api.add_resource(views.CDNViews, '/cdn/', endpoint="cdn")
-api.add_resource(views.CDNDetail, '/cdn/<string:pk>/', endpoint="cdn-detail")
+# 实例相关视图
+api.add_resource(instance.InstanceViews, '/instance/', endpoint="ins-all")
+api.add_resource(instance.InstanceClassViews, '/instance/<string:class_name>/', endpoint="ins-cls-list")
+api.add_resource(instance.InstanceClassDetail, '/instance/<string:class_name>/<string:pk>/', endpoint="ins-cls-detail")
diff --git a/src/common/formatter.py b/src/common/formatter.py
new file mode 100644
index 0000000..56c0bd4
--- /dev/null
+++ b/src/common/formatter.py
@@ -0,0 +1,31 @@
+from flask_restful import marshal
+from common.serializer import marshal as marshal_fields
+from functools import reduce
+
+
+def merge_dict_reduce(x: dict, y: dict):
+    """合并字典"""
+    x.update(y)
+    return x
+
+
+def key_indexed_map(dataset: list, fields, key="id"):
+    """将数据集合转换为以指定列为 `key` 的数据，可以指定 `key` 为某个字段名
+    如：{
+          "xx01": {"id": "xx01", "field_1": "1", ...},
+          "xx02": {"id": "xx02", "field_1": "1", ...},
+        }
+    """
+    def pk_indexed_map(obj):
+        """需要是个闭包，使用传入的参数"""
+        idx = str(getattr(obj, key)) if hasattr(obj, key) else ""
+        return {idx: marshal(obj, fields)}
+
+    return reduce(merge_dict_reduce, map(pk_indexed_map, dataset))
+
+
+def to_list(dataset: list, fields, only_exist=True, **kwargs):
+    """将数据集合转换为 `list` 对象，按 fields 字段描述转换"""
+    if only_exist:
+        return list(map(lambda x: marshal_fields(x, fields, only_exist=True, **kwargs), dataset))
+    return list(map(lambda x: marshal(x, fields, **kwargs), dataset))
diff --git a/src/common/serializer.py b/src/common/serializer.py
new file mode 100644
index 0000000..a1d323c
--- /dev/null
+++ b/src/common/serializer.py
@@ -0,0 +1,60 @@
+from collections import OrderedDict
+
+
+def marshal(data, fields, envelope=None, only_exist=False, required_fields=None, **kwargs):
+    """Takes raw data (in the form of a dict, list, object) and a dict of
+    fields to output and filters the data based on those fields.
+
+    :param data: the actual object(s) from which the fields are taken from
+    :param fields: a dict of whose keys will make up the final serialized
+                   response output
+    :param envelope: optional key that will be used to envelop the serialized
+                     response
+    :param only_exist: 只渲染存在的 key
+    :param required_fields: 必须渲染的 key，不会被 only_exist 排除
+
+
+    >>> from flask_restful import fields, marshal
+    >>> data = { 'a': 100, 'b': 'foo' }
+    >>> mfields = { 'a': fields.Raw }
+
+    >>> marshal(data, mfields)
+    OrderedDict([('a', 100)])
+
+    >>> marshal(data, mfields, envelope='data')
+    OrderedDict([('data', OrderedDict([('a', 100)]))])
+
+    """
+
+    if required_fields is None:
+        required_fields = []
+
+    def make(cls):
+        if isinstance(cls, type):
+            return cls()
+        return cls
+
+    if isinstance(data, (list, tuple)):
+        return (OrderedDict([(envelope, [marshal(d, fields) for d in data])])
+                if envelope else [marshal(d, fields) for d in data])
+
+    if not only_exist:
+        items = ((k, marshal(data, v) if isinstance(v, dict)
+                  else make(v).output(k, data))
+                 for k, v in fields.items())
+    else:
+        def parse(item):
+            k, v = item
+            if isinstance(v, dict):
+                return k, marshal(data, v)
+            if hasattr(data, k) or k in required_fields:
+                return k, make(v).output(k, data)
+            return None, ""
+        # items = ((k, marshal(data, v) if isinstance(v, dict)
+        #           else make(v).output(k, data))
+        #          for k, v in fields.items())
+        items = ((k, v) for k, v in map(parse, fields.items()) if k is not None)
+        print(items)
+    return OrderedDict([(envelope, OrderedDict(items))]) if envelope else OrderedDict(items)
+
+
diff --git a/src/common/views.py b/src/common/views.py
index 7c5e84b..dce4076 100644
--- a/src/common/views.py
+++ b/src/common/views.py
@@ -4,6 +4,7 @@ from typing import List, Dict
 from flask import request
 from flask_restful import abort, Resource, marshal, fields, reqparse
 
+from common import formatter
 from common.utils import abort_response
 from common.crypto import quick_crypto
 
@@ -60,9 +61,9 @@ class ModelViewBase(Resource):
     # method_decorators = [token_header_required, ]
     method_decorators = []
 
-    def get_object(self, pk):
+    def get_object(self, pk, **kwargs):
         try:
-            return self.model.objects(id=pk).first_or_404(message="resource not found")
+            return self.model.objects(id=pk, **kwargs).first_or_404(message="resource not found")
         except:
             abort(404, msg=f"resource '{pk}' not found")
 
@@ -117,7 +118,7 @@ class ModelViewBase(Resource):
         if errors:
             abort_response(400, 1001, msg=f"部分字段需要唯一，请检查重复！", errors=errors)
 
-    def validate_fields(self, args: dict, create=True) -> dict:
+    def validate_fields(self, args: dict, create=True, **kwargs) -> dict:
         return args
 
     @staticmethod
@@ -163,7 +164,7 @@ class ListMixin(ModelViewBase):
     # filter 过滤的字段参数
     filter_fields = []
 
-    def get_queryset(self):
+    def get_queryset(self, *args, **kwargs):
         self.queryset = self.model.objects
 
     def filter_queryset(self):
@@ -197,21 +198,23 @@ class ListMixin(ModelViewBase):
             logger.exception(f"查询出错 {self.model} query_params={query_params}")
         return queryset
 
-    def get(self):
+    def get(self, *args, **kwargs):
         """获取列表数据"""
         # 过滤后的数据，
 
-        self.get_queryset()
+        self.get_queryset(*args, **kwargs)
 
-        # TODO 匹配过滤参数
         self.queryset = self.filter_queryset()
-
-        if self.paging:
+        limit = request.args.get("limit")
+        if self.paging and limit != "0":
             return self.paginate_queryset(self. queryset)
 
-        # TODO 这里还未了解到比较妥的办法，似乎 `marshal` 返回的信息必须是 `dict`，返回铺平对象的 `[{obj}, {obj}]` 没找到方法，待研究
-        # 不分页，需要取出对象，铺平
-        return [marshal(obj, self.fields) for obj in self.queryset]
+        # 转为对象列表
+        if self.queryset.count() > 0:
+            return formatter.to_list(self.queryset, self.fields, only_exist=True)
+            # return marshal(self.queryset, self.fields, envelope="id")
+            # return formatter.key_indexed_map(self.queryset, self.fields)
+        return []
 
 
 class CreateMixin(ModelViewBase):
@@ -227,7 +230,7 @@ class CreateMixin(ModelViewBase):
 
         # 解析参数
         args = self.request_parse.parse_args()
-        validated_data = self.validate_fields(args, create=True)
+        validated_data = self.validate_fields(args, create=True, **kwargs)
 
         # 校验关联字段
         self.validate_relation_fields(validated_data)
@@ -319,6 +322,67 @@ class DetailViewSet(RetrieveMixin, UpdateMixin, DestroyMixin):
     """带 `pk` 参数的视图集合"""
 
 
+class RetrieveClassMixin(ModelViewBase):
+
+    def get(self, class_name, pk):
+        obj = self.get_object(pk, class_name=class_name)
+        return marshal(obj, self.fields)
+
+
+class UpdateClassMixin(ModelViewBase):
+
+    def pre_update(self, obj, args: dict):
+        """更新前钩子"""
+        data = {}
+        for k, v in args.items():
+            # 为 None 的不设置
+            if v is not None:
+                data[k] = v
+        return data
+
+    def put(self, class_name, pk):
+        # 获取对象
+        obj = self.get_object(pk, class_name=class_name)
+
+        # 解析参数
+        args = self.request_parse.parse_args()
+        validated_data = self.validate_fields(args, create=False)
+        # 校验关联字段
+        self.validate_relation_fields(validated_data)
+        validated_data = self.pre_update(obj, validated_data)
+
+        # 检查重复：检查提交的唯一字段值，是否有存在的对象，与当前对象id不同认为异常
+        self.validate_uniq_fields(args, obj=obj)
+
+        # 更新对象、保存
+        try:
+            obj.update(**validated_data)
+            obj.save()
+            # 重新读取数据
+            obj.reload()
+        except Exception as e:
+            logger.exception(f"{self.model} 保存对象失败！pk={pk} data={args}")
+            abort_response(500, 1500, msg=f"保存对象失败！{str(e)}")
+            return
+
+        return marshal(obj, self.fields)
+
+
+class DestroyClassMixin(ModelViewBase):
+
+    def pre_destroy(self, obj):
+        """删除对象前的方法，可以在这拦截做些操作"""
+        pass
+
+    def delete(self, class_name, pk):
+        """删除对象方法"""
+        obj = self.get_object(pk, class_name=class_name)
+        # 删除前钩子
+        self.pre_destroy(obj)
+        obj.delete()
+        return {"id": pk}
+
+
 class EncryptRequiredCreateView(CreateMixin):
     """创建对象时，加密字段的视图"""
     # 需要加密的字段
diff --git a/src/controller/asset/credential.py b/src/controller/asset/credential.py
new file mode 100644
index 0000000..4b5a9e3
--- /dev/null
+++ b/src/controller/asset/credential.py
@@ -0,0 +1,80 @@
+from flask import request
+from flask_restful import reqparse
+
+from models.asset.credential import Credential
+from models.asset.credentialFields import CredentialFields, CredentialDetailFields
+from common.views import (ListCreateViewSet, DetailViewSet,
+                          RetrieveClassMixin, DestroyClassMixin, UpdateClassMixin)
+from common.utils import abort_response
+
+
+class CredentialParse:
+    """凭据信息的校验类"""
+    request_parse = None
+    # 给子类用的唯一字段，用于校验
+    # uniq_fields = ("name", "host")
+
+    def init_parse(self):
+        self.request_parse = reqparse.RequestParser()
+
+        self.request_parse.add_argument("class_name", required=False, type=str, location='json')
+
+        self.request_parse.add_argument("extra", required=False, type=dict, location='json')
+        self.request_parse.add_argument("data", required=False, type=dict, location='json')
+        self.request_parse.add_argument("tags", required=False, type=list, location='json')
+        self.request_parse.add_argument("labels", required=False, type=dict, location='json')
+
+
+class CredentialClassNameValidate:
+    """统一校验 class_name"""
+    def validate_fields(self, args: dict, create=False, **kwargs) -> dict:
+        class_name = kwargs.get("class_name")
+        class_name_params = args.get("class_name")
+        if class_name_params and class_name_params != class_name:
+            return abort_response(400, 1400, msg="URL中的类别与内容中的类别字段有差异!")
+        args["class_name"] = class_name
+        return args
+
+
+class CredentialViews(CredentialParse, ListCreateViewSet):
+    """凭据列表、创建视图"""
+    model = Credential
+    fields = CredentialFields
+    filter_fields = (("name", "icontains"), )
+
+    def __init__(self):
+        self.init_parse()
+        print(request.method)
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+
+class CredentialDetail(CredentialParse, CredentialClassNameValidate, DetailViewSet):
+    """凭据详情"""
+    model = Credential
+    fields = CredentialDetailFields
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=False, type=str, location='json')
+
+
+class CredentialClassViews(CredentialParse, CredentialClassNameValidate, ListCreateViewSet):
+    """凭据列表，带 class_name 参数"""
+    model = Credential
+    fields = CredentialFields
+    filter_fields = (("name", "icontains"),)
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+
+class CredentialClassDetail(CredentialParse, CredentialClassNameValidate,
+                            RetrieveClassMixin, DestroyClassMixin, UpdateClassMixin):
+    """凭据详情，带 class_name 和 pk 参数"""
+    model = Credential
+    fields = CredentialDetailFields
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=False, type=str, location='json')
diff --git a/src/controller/asset/instance.py b/src/controller/asset/instance.py
new file mode 100644
index 0000000..1871250
--- /dev/null
+++ b/src/controller/asset/instance.py
@@ -0,0 +1,94 @@
+from flask_restful import reqparse
+
+from models.asset.middleware import Middleware
+from models.asset.instance import Instance
+from models.asset.instanceFields import InstanceFields, InstanceDetailFields
+from common.views import (ListCreateViewSet, DetailViewSet,
+                          RetrieveClassMixin, DestroyClassMixin, UpdateClassMixin)
+from common.utils import abort_response
+
+
+class InstanceParse:
+    """
+    中间件模型公共字段的校验类
+    """
+    request_parse = None
+    # 给子类用的唯一字段，用于校验
+    uniq_fields = (("name", "class_name"),)
+
+    def init_parse(self):
+        self.request_parse = reqparse.RequestParser()
+        self.request_parse.add_argument("class_name", required=False, type=str, location='json')
+        self.request_parse.add_argument("middleware_id", required=False, type=str, location='json')
+        self.request_parse.add_argument("credentials", required=False, type=list, location='json')
+
+        self.request_parse.add_argument("extra", required=False, type=dict, location='json')
+        self.request_parse.add_argument("data", required=False, type=dict, location='json')
+        self.request_parse.add_argument("tags", required=False, type=list, location='json')
+        self.request_parse.add_argument("labels", required=False, type=dict, location='json')
+
+
+class InstanceClassNameValidate:
+    """统一校验 class_name和关联的中间件，若中间件 ID 设置值，class_name 需要相同"""
+    def validate_fields(self, args: dict, create=False, **kwargs) -> dict:
+        # 校验 class_name，非必填参数，但是在URL中有传递
+        # 若URL中的参数与请求体中的参数不一致，将抛错（最好是请求体中不带，以URL中的为准）
+        class_name = kwargs.get("class_name")
+        class_name_params = args.get("class_name")
+        if class_name_params and class_name_params != class_name:
+            return abort_response(400, 1400, msg="URL中的类别与内容中的类别字段有差异!")
+        args["class_name"] = class_name
+
+        # 校验 middleware_id 若设置值，检查 middleware 对象是否存在，且类型与 instance 一致
+        middleware_id = args.get("middleware_id")
+        if middleware_id:
+            try:
+                assert Middleware.objects(id=middleware_id, class_name=class_name).first()
+            except:
+                return abort_response(400, 1400, msg="参数中的同类型 middleware 对象不存在")
+        return args
+
+
+class InstanceViews(InstanceParse, ListCreateViewSet):
+    model = Instance
+    fields = InstanceFields
+    filter_fields = (("name", "icontains"), ("class_name", ""))
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+
+class InstanceDetailViews(InstanceParse, DetailViewSet):
+    model = Instance
+    fields = InstanceDetailFields
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=False, type=str, location='json')
+
+
+class InstanceClassViews(InstanceParse, InstanceClassNameValidate, ListCreateViewSet):
+    """某类别的实例列表"""
+    model = Instance
+    fields = InstanceFields
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+    def get_queryset(self, *args, **kwargs):
+        self.queryset = self.model.objects(**kwargs)
+
+
+class InstanceClassDetail(InstanceParse, InstanceClassNameValidate, RetrieveClassMixin, UpdateClassMixin, DestroyClassMixin):
+    """某类别的实例详情"""
+    model = Instance
+    fields = InstanceDetailFields
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=False, type=str, location='json')
+
+    def get_queryset(self, *args, **kwargs):
+        self.queryset = self.model.objects(**kwargs)
diff --git a/src/controller/asset/middleware.py b/src/controller/asset/middleware.py
new file mode 100644
index 0000000..d1007f9
--- /dev/null
+++ b/src/controller/asset/middleware.py
@@ -0,0 +1,90 @@
+from flask_restful import reqparse
+
+from models.asset.middleware import Middleware
+from models.asset.middlewareFields import MiddlewareFields
+from common.utils import abort_response
+from common.views import (ListCreateViewSet, ListMixin, DetailViewSet,
+                          RetrieveClassMixin, DestroyClassMixin, UpdateClassMixin)
+
+
+class MiddlewareParse:
+    """
+    中间件模型公共字段的校验类
+    """
+    request_parse = None
+    # 给子类用的唯一字段，用于校验
+    uniq_fields = ("name", "host")
+
+    def init_parse(self):
+        self.request_parse = reqparse.RequestParser()
+
+        self.request_parse.add_argument("class_name", required=False, type=str, location='json')
+        self.request_parse.add_argument("host", required=False, type=str, location='json')
+        self.request_parse.add_argument("port", required=False, type=int, location='json')
+        self.request_parse.add_argument("manage", required=False, type=str, location='json')
+
+        self.request_parse.add_argument("extra", required=False, type=dict, location='json')
+        self.request_parse.add_argument("data", required=False, type=dict, location='json')
+        self.request_parse.add_argument("tags", required=False, type=list, location='json')
+        self.request_parse.add_argument("labels", required=False, type=dict, location='json')
+
+
+class MiddlewareClassNameValidate:
+    """统一校验 class_name"""
+    def validate_fields(self, args: dict, create=False, **kwargs) -> dict:
+        class_name = kwargs.get("class_name")
+        class_name_params = args.get("class_name")
+        if class_name_params and class_name_params != class_name:
+            return abort_response(400, 1400, msg="URL中的类别与内容中的类别字段有差异!")
+        args["class_name"] = class_name
+        return args
+
+
+class MiddlewareViews(MiddlewareParse, ListCreateViewSet):
+    model = Middleware
+    fields = MiddlewareFields
+    uniq_fields = ("name",)
+    filter_fields = (("name", "icontains"), ("host", "icontains"), ("manage", "icontains"), ("class_name", ""))
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+
+class MiddlewareDetail(MiddlewareParse, DetailViewSet):
+    """分类别的视图"""
+    model = Middleware
+    fields = MiddlewareFields
+    uniq_fields = ("name",)
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+
+class MiddlewareClassViews(MiddlewareParse, MiddlewareClassNameValidate, ListCreateViewSet):
+    """按分类的中间件视图，带 class_name 参数"""
+    model = Middleware
+    fields = MiddlewareFields
+    uniq_fields = ("name",)
+    filter_fields = (("name", "icontains"), ("host", "icontains"), ("manage", "icontains"))
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=True, type=str, location='json')
+
+    def get_queryset(self, *args, **kwargs):
+        """按分类查找"""
+        self.queryset = self.model.objects(**kwargs)
+
+
+class MiddlewareClassDetail(MiddlewareParse, MiddlewareClassNameValidate,
+                            RetrieveClassMixin, DestroyClassMixin, UpdateClassMixin):
+    """分类别的详情视图，带 class_name 和 pk 参数"""
+    model = Middleware
+    fields = MiddlewareFields
+    uniq_fields = ("name",)
+
+    def __init__(self):
+        self.init_parse()
+        self.request_parse.add_argument("name", required=False, type=str, location='json')
diff --git a/src/models/asset/credential.py b/src/models/asset/credential.py
new file mode 100644
index 0000000..cac4918
--- /dev/null
+++ b/src/models/asset/credential.py
@@ -0,0 +1,13 @@
+import mongoengine as mongo
+from common.document import DocumentBase
+
+
+class Credential(DocumentBase):
+    """凭据信息"""
+    meta = {'allow_inheritance': True, 'collection': 'credential'}
+    class_name = mongo.StringField(required=False, default="")
+    name = mongo.StringField(required=True)
+    extra = mongo.DictField(required=False)
+    data = mongo.DictField(default=dict)
+    tags = mongo.ListField(mongo.StringField(), default=list)  # tags 默认是空列表
+    labels = mongo.DictField(default=dict)
diff --git a/src/models/asset/credentialFields.py b/src/models/asset/credentialFields.py
new file mode 100644
index 0000000..be82e91
--- /dev/null
+++ b/src/models/asset/credentialFields.py
@@ -0,0 +1,15 @@
+from flask_restful import fields
+
+
+CredentialFields = {
+    "id": fields.String,
+    "name": fields.String,
+    "class_name": fields.String,
+    "extra": fields.Raw,
+    "credentials": fields.List(fields.String),
+    "data": fields.Raw,
+    "tags": fields.List(fields.String),
+    "labels": fields.Raw,
+}
+
+CredentialDetailFields = CredentialFields
diff --git a/src/models/asset/fields.py b/src/models/asset/fields.py
index 2510131..e6e2ba5 100644
--- a/src/models/asset/fields.py
+++ b/src/models/asset/fields.py
@@ -38,6 +38,18 @@ DatabaseServerFields = {
     "labels": fields.Raw,
 }
 
+
+databaseDetailFields = {
+    "id": "",
+    "name": fields.String,
+    "domain": fields.String,
+    "host": fields.String,
+    "manage": fields.String,
+    "data": fields.Raw,
+    "tags": fields.List(fields.String),
+    "labels": fields.Raw,
+}
+
 DatabaseFields = {
     "id": fields.String,
     "name": fields.String,
diff --git a/src/models/asset/instance.py b/src/models/asset/instance.py
new file mode 100644
index 0000000..8626856
--- /dev/null
+++ b/src/models/asset/instance.py
@@ -0,0 +1,35 @@
+import mongoengine as mongo
+
+from common.document import DocumentBase
+from models.asset.middleware import Middleware
+
+
+class Instance(DocumentBase):
+    """"""
+    meta = {'allow_inheritance': True, 'collection': 'instance'}
+    # 实例的分类名称
+    class_name = mongo.StringField(required=False, default="")
+
+    # 实例的名称，可能是库名、仓库名等
+    name = mongo.StringField(required=True)
+
+    # 关联的 middleware
+    middleware_id = mongo.ObjectIdField(required=False)
+
+    # 对应可以有多个凭据
+    credentials = mongo.ListField(mongo.ObjectIdField, default=list)
+    # 按类型不同的信息存放到 extra 字典
+    extra = mongo.DictField(default=dict)
+
+    data = mongo.DictField(default=dict)
+    tags = mongo.ListField(mongo.StringField(), default=list)  # tags 默认是空列表
+    labels = mongo.DictField(default=dict)
+
+    @property
+    def middleware(self):
+        if self.middleware_id:
+            try:
+                return Middleware.objects(id=self.middleware_id).first()
+            except:
+                pass
+        return None
diff --git a/src/models/asset/instanceFields.py b/src/models/asset/instanceFields.py
new file mode 100644
index 0000000..9483e58
--- /dev/null
+++ b/src/models/asset/instanceFields.py
@@ -0,0 +1,30 @@
+from flask_restful import fields
+
+from models.asset.middlewareFields import MiddlewareFields
+
+# 普通视图，只返回内部字段
+InstanceFields = {
+    "id": fields.String,
+    "name": fields.String,
+    "class_name": fields.String,
+    "middleware_id": fields.String,
+
+    "extra": fields.Raw,
+    "data": fields.Raw,
+    "tags": fields.List(fields.String),
+    "labels": fields.Raw,
+}
+
+# 详情视图，返回中间件和凭据
+InstanceDetailFields = {
+    "id": fields.String,
+    "name": fields.String,
+    "class_name": fields.String,
+    "middleware": fields.Nested(MiddlewareFields),
+    "credentials": fields.List(fields.String),
+
+    "extra": fields.Raw,
+    "data": fields.Raw,
+    "tags": fields.List(fields.String),
+    "labels": fields.Raw,
+}
diff --git a/src/models/asset/middleware.py b/src/models/asset/middleware.py
new file mode 100644
index 0000000..f4fe2a9
--- /dev/null
+++ b/src/models/asset/middleware.py
@@ -0,0 +1,33 @@
+import mongoengine as mongo
+
+from common.document import DocumentBase
+
+
+class Middleware(DocumentBase):
+    """中间件"""
+    meta = {'allow_inheritance': True, 'collection': 'mdw', 'strict': False}
+    # 分类名称
+    class_name = mongo.StringField(required=False, default="")
+
+    name = mongo.StringField(required=True)
+    host = mongo.StringField(required=False, default="")
+    port = mongo.IntField(default=0)
+    # 管理者，预留
+    manage = mongo.StringField(max_length=128, required=False, default="")
+    extra = mongo.DictField(default=dict)
+    data = mongo.DictField(default=dict)
+    # 标记和标签
+    tags = mongo.ListField(mongo.StringField(), default=list)  # tags 默认是空列表
+    labels = mongo.DictField(default=dict)
+
+
+# class DBServer(Middleware):
+#     """数据库服务器"""
+#     meta = {'allow_inheritance': True, 'strict': False}
+#     domain = mongo.StringField(required=False)  # 域名连接的地址
+#     credentials = mongo.ListField(mongo.ObjectIdField, default=list)
+
+#     配置
+#     storage = mongo.IntField(required=False, default=0)
+#     memory = mongo.IntField(required=False, default=0)
+#     core = mongo.IntField(required=False, default=0)
diff --git a/src/models/asset/middlewareFields.py b/src/models/asset/middlewareFields.py
new file mode 100644
index 0000000..2715fd9
--- /dev/null
+++ b/src/models/asset/middlewareFields.py
@@ -0,0 +1,38 @@
+from flask_restful import fields
+
+MiddlewareFields = {
+    "id": fields.String,
+    "name": fields.String,
+    "host": fields.String,
+    "port": fields.Integer,
+    "manage": fields.String,
+    "class_name": fields.String,
+    "extra": fields.Raw,
+    "credentials": fields.List(fields.String),
+    "data": fields.Raw,
+    "tags": fields.List(fields.String),
+    "labels": fields.Raw,
+}
+
+# DatabaseFields = {
+#     "id": fields.String,
+#     "name": fields.String,
+#     "username": fields.String,
+#     "password": fields.String,
+#     "data": fields.Raw,
+#     "tags": fields.List(fields.String),
+#     "labels": fields.Raw,
+# }
+#
+# DBServerFields = {
+#     "domain": fields.String,
+#     "port": fields.Integer,
+#     "username": fields.String,
+#     "password": fields.String,
+#     "storage": fields.Integer,
+#     "memory": fields.Integer,
+#     "core": fields.Integer,
+#     "databases": fields.List(fields.Nested(DatabaseFields))
+# }
+#
+# DBServerFields.update(MiddlewareFields)
diff --git a/src/models/project/fields.py b/src/models/project/fields.py
index 3c1b887..539f213 100644
--- a/src/models/project/fields.py
+++ b/src/models/project/fields.py
@@ -44,6 +44,7 @@ ChannelFields = {
     "id": fields.String,
     "project": fields.Nested(ProjectSimpleField),
     "name": fields.String,
+    "fullname": fields.String,
     "spid": fields.String,
     "is_cross": fields.Boolean,
     "version": fields.Nested(VersionFields),
diff --git a/src/models/project/models.py b/src/models/project/models.py
index 1981704..acce387 100644
--- a/src/models/project/models.py
+++ b/src/models/project/models.py
@@ -81,6 +81,13 @@ class Channel(DocumentBase):
         if isinstance(val, Project):
             self.project_id = str(val.id)
 
+    @property
+    def fullname(self):
+        project = ""
+        if self.project:
+            project = self.project.fullname
+        return f"{self.spid} {project}"
+
     @classmethod
     def filter_by_project(cls, name, fork, queryset=None):
         """过滤项目的所有渠道"""