Cleaning

.gitignore

@@ -3,3 +3,5 @@
 __pycache__/
 venv/
 settings.json
+ucloud_common
+etcd3_wrapper

common_fields.py

@@ -0,0 +1,64 @@
+from etcd3_wrapper import Etcd3Wrapper
+from specs_parser import SpecsParser
+
+specs_parser = SpecsParser(exceptional_devices=["cpu"])
+
+
+class Field(object):
+    def __init__(self, _name, _type, _value=None):
+        self.name = _name
+        self.value = _value
+        self.type = _type
+        self.__errors = []
+
+    def validation(self):
+        return True
+
+    def is_valid(self):
+        if self.value == KeyError:
+            self.add_error(f"'{self.name}' field is a required field")
+        else:
+            if not isinstance(self.value, self.type):
+                self.add_error(f"Incorrect Type for '{self.name}' field")
+            else:
+                self.validation()
+
+        if self.__errors:
+            return False
+        return True
+
+    def get_errors(self):
+        return self.__errors
+
+    def add_error(self, error):
+        self.__errors.append(error)
+
+
+class VmUUIDField(Field):
+    def __init__(self, data):
+        self.uuid = data.get("uuid", KeyError)
+
+        super().__init__("uuid", str, self.uuid)
+
+        self.validation = self.vm_uuid_validation
+
+    def vm_uuid_validation(self):
+        client = Etcd3Wrapper()
+
+        r = client.get(f"/v1/vm/{self.uuid}")
+        if not r:
+            self.add_error(f"VM with uuid {self.uuid} does not exists")
+
+
+class SpecsField(Field):
+    def __init__(self, data):
+        self.specs = data.get("specs", KeyError)
+
+        super().__init__("specs", dict, self.specs)
+
+        self.validation = self.specs_validation
+
+    def specs_validation(self):
+        if not specs_parser.transform_specs(self.specs):
+            self.add_error("Invalid unit - "
+                           f"Please use following units {specs_parser.get_allowed_units()}")

create_image_store.py

@@ -0,0 +1,23 @@
+import json
+from uuid import uuid4
+from etcd3_wrapper import Etcd3Wrapper
+
+client = Etcd3Wrapper()
+
+data = {
+    "is_public": True,
+    "type": "ceph",
+    "name": "images",
+    "description": "first ever public image-store",
+    "attributes": {
+        "list": [],
+        "key": [],
+        "pool": "images",
+    }
+}
+
+client.put(
+    f"/v1/image_store/{uuid4().hex}",
+    json.dumps(data),
+)
+

helper.py

@@ -26,15 +26,3 @@ def check_otp(name, realm, token):
         data=data,
     )
     return response.status_code
-
-
-def add_otp_args(parser):
-    parser.add_argument("name", required=True)
-    parser.add_argument("realm", required=True)
-    parser.add_argument("token", required=True)
-    return parser
-
-
-def add_vmid_args(parser):
-    parser.add_argument("vmid", required=True)
-    return parser

main.py

@@ -4,176 +4,74 @@
 
 import json
 
-from helper import check_otp, add_otp_args, add_vmid_args
-from flask import Flask
-from flask_restful import Resource, Api, reqparse
+from flask import Flask, request
+from flask_restful import Resource, Api
 from uuid import uuid4
 from etcd3_wrapper import Etcd3Wrapper
-from specs_parser import SpecsParser
+
+from ucloud_common.vm import VmPool, VMStatus
+from schemas import (CreateVMSchema, VMStatusSchema,
+                     CreateImageSchema, VmActionSchema,
+                     OTPSchema, CreateHostSchema)
+
 app = Flask(__name__)
 api = Api(app)
 
 client = Etcd3Wrapper()
-
-# CreateVM argparser
-createvm_argparser = reqparse.RequestParser()
-createvm_argparser.add_argument("specs", type=dict, required=True)
-createvm_argparser.add_argument("image_uuid", type=str, required=True)
-add_otp_args(createvm_argparser)
-
-# CreateImage argparser
-createimage_argparser = reqparse.RequestParser()
-createimage_argparser.add_argument("uuid", type=str, required=True)
-createimage_argparser.add_argument("name", type=str, required=True)
-createimage_argparser.add_argument("image_store", type=str, required=True)
-
-# DeleteVM argparser
-deletevm_argparser = reqparse.RequestParser()
-add_vmid_args(add_otp_args(deletevm_argparser))
-
-# VMStatus argparser
-vmstatus_argparser = reqparse.RequestParser()
-add_vmid_args(vmstatus_argparser)
-
-# StartVM argparser
-startvm_argparser = reqparse.RequestParser()
-add_vmid_args(add_otp_args(startvm_argparser))
-
-# UserVM argparser
-uservm_argparser = reqparse.RequestParser()
-add_otp_args(uservm_argparser)
-
-# Specs parser
-specs_parser = SpecsParser(exceptional_devices=["cpu"])
-
-# AddHost argparser
-addhost_argparser = reqparse.RequestParser()
-addhost_argparser.add_argument("hostname", type=str, required=True)
-addhost_argparser.add_argument("specs", type=dict, required=True)
-add_otp_args(addhost_argparser)
-
-
-def is_image_valid(image_uuid):
-    images = client.get_prefix("/v1/image/")
-    return image_uuid in [i.key.split("/")[-1] for i in images]
+vm_pool = VmPool(client, "/v1/vm")
 
 
 class CreateVM(Resource):
     def post(self):
-        createvm_args = createvm_argparser.parse_args()
-        name, realm, token, specs, image_uuid = (
-            createvm_args.name,
-            createvm_args.realm,
-            createvm_args.token,
-            createvm_args.specs,
-            createvm_args.image_uuid,
-        )
-
-        if check_otp(name, realm, token) == 200:
-            # User is good
-            if is_image_valid(image_uuid):
-                if not specs_parser.transform_specs(specs):
-                    return (
-                        {
-                            "message": f"""Invalid unit - Please use following units {specs_parser.get_allowed_units()}"""
-                        },
-                        400,
-                    )
-
-                print(specs)
+        data = request.json
+        validator = CreateVMSchema(data)
+        if validator.is_valid():
             vm_key = f"/v1/vm/{uuid4().hex}"
             vm_entry = {
-                    "owner": name,
-                    "specs": specs,
+                "owner": data["name"],
+                "specs": data["specs"],
                 "hostname": "",
                 "status": "REQUESTED_NEW",
-                    "image_uuid": image_uuid,
+                "image_uuid": data["image_uuid"],
             }
-
             client.put(vm_key, vm_entry, value_in_json=True)
-
             return {"message": "VM Creation Queued"}, 200
         else:
-                return {"message": "Image uuid not valid"}
-        else:
-            return {"message": "Invalid Credentials"}, 400
-
-
-class DeleteVM(Resource):
-    def post(self):
-        deletevm_args = deletevm_argparser.parse_args()
-        name, realm, token, vmid = (
-            deletevm_args.name,
-            deletevm_args.realm,
-            deletevm_args.token,
-            deletevm_args.vmid,
-        )
-
-        if check_otp(name, realm, token) == 200:
-            # User is good
-
-            vmentry_etcd = client.get(f"/v1/vm/{vmid}").value
-            if vmentry_etcd:
-                vmentry_etcd = json.loads(vmentry_etcd)
-                vmentry_etcd["status"] = "REQUESTED_DELETE"
-
-                client.put(f"/v1/vm/{vmid}", vmentry_etcd,
-                           value_in_json=True)
-
-                return {"message": "VM Deletion Queued"}, 200
-            else:
-                return {"message": "Invalid VM ID"}
-        else:
-            return {"message": "Invalid Credentials"}, 400
+            return validator.get_errors(), 400
 
 
 class VmStatus(Resource):
     def get(self):
-        args = vmstatus_argparser.parse_args()
-        r = client.get(f"/v1/vm/{args.vmid}").value
-        print(r)
-        if r:
-            r = dict(json.loads(r.decode("utf-8")))
-            return r
-        return {"Message": "Not Found"}
+        data = request.json
+        validator = VMStatusSchema(data)
+        if validator.is_valid():
+            vm = vm_pool.get(f"/v1/vm/{data['uuid']}")
+            return str(vm)
+        else:
+            return validator.get_errors(), 400
 
 
 class CreateImage(Resource):
     def post(self):
-        image_stores = list(client.get_prefix("/v1/image_store/"))
-        args = createimage_argparser.parse_args()
-        image_file_uuid = args.uuid
-        image_store_name = args.image_store
-
-        file_entry = client.get(f"/v1/file/{image_file_uuid}")
-        if file_entry is None:
-            return (
-                {"Message": f"Image File with uuid '{image_file_uuid}' Not Found"},
-                400,
-            )
-
+        data = request.json
+        validator = CreateImageSchema(data)
+        if validator.is_valid():
+            file_entry = client.get(f"/v1/file/{data['uuid']}")
             file_entry_value = json.loads(file_entry.value)
 
-        image_store = list(
-            filter(
-                lambda s: json.loads(s.value)["name"] == image_store_name, image_stores
-            )
-        )
-        if not image_store:
-            return {"Message": f"Store '{image_store_name}' does not exists"}, 400
-
-        image_store = image_store[0]
             image_entry_json = {
                 "status": "TO_BE_CREATED",
                 "owner": file_entry_value["owner"],
                 "filename": file_entry_value["filename"],
-            "name": args.name,
-            "store_name": image_store_name,
+                "name": data["name"],
+                "store_name": data["image_store"],
                 "visibility": "public",
             }
-        client.put(f"/v1/image/{image_file_uuid}", json.dumps(image_entry_json))
+            client.put(f"/v1/image/{data['uuid']}", json.dumps(image_entry_json))
 
             return {"Message": "Image successfully created"}
+        else:
+            return validator.get_errors(), 400
 
 
 class ListPublicImages(Resource):
@@ -186,93 +84,41 @@ class ListPublicImages(Resource):
         return r, 200
 
 
-class StartVM(Resource):
+class VMAction(Resource):
     def post(self):
-        args = startvm_argparser.parse_args()
-        name, realm, token, vm_uuid = args.name, args.realm, args.token, args.vmid
+        data = request.json
+        validator = VmActionSchema(data)
+        action = data["action"]
+
+        if validator.is_valid():
+            vm = vm_pool.get(f"/v1/vm/{data['uuid']}")
+            if action == "start":
+                vm.status = VMStatus.requested_start
+            elif action == "suspend":
+                vm.status = VMStatus.requested_suspend
+            elif action == "resume":
+                vm.status = VMStatus.requested_resume
+            elif action == "shutdown":
+                vm.status = VMStatus.requested_shutdown
+            elif action == "delete":
+                vm.status = VMStatus.requested_delete
 
-        if check_otp(name, realm, token) == 200:
-            vm = client.get(f"/v1/vm/{vm_uuid}", value_in_json=True)
-            if vm:
-                if vm.value["owner"] != name:
-                    return {"message": "Invalid User"}
-                vm.value["status"] = "REQUESTED_START"
             client.put(vm.key, json.dumps(vm.value))
             return {"message": f"VM Start Queued"}
         else:
-                return {"message": "No such VM found"}
-        else:
-            return {"message": "Invalid Credentials"}, 400
-
-
-class SuspendVM(Resource):
-    def post(self):
-        args = startvm_argparser.parse_args()
-        name, realm, token, vm_uuid = args.name, args.realm, args.token, args.vmid
-
-        if check_otp(name, realm, token) == 200:
-            vm = client.get(f"/v1/vm/{vm_uuid}", value_in_json=True)
-            if vm:
-                if vm.value["owner"] != name:
-                    return {"message": "Invalid User"}
-                vm.value["status"] = "REQUESTED_SUSPEND"
-                client.put(vm.key, json.dumps(vm.value))
-                return {"message": f"VM Suspension Queued"}
-            else:
-                return {"message": "No such VM found"}
-        else:
-            return {"message": "Invalid Credentials"}, 400
-
-
-class ResumeVM(Resource):
-    def post(self):
-        args = startvm_argparser.parse_args()
-        name, realm, token, vm_uuid = args.name, args.realm, args.token, args.vmid
-
-        if check_otp(name, realm, token) == 200:
-            vm = client.get(f"/v1/vm/{vm_uuid}", value_in_json=True)
-            if vm:
-                if vm.value["owner"] != name:
-                    return {"message": "Invalid User"}
-                vm.value["status"] = "REQUESTED_RESUME"
-                client.put(vm.key, json.dumps(vm.value))
-                return {"message": f"VM Resume Queued"}
-            else:
-                return {"message": "No such VM found"}
-        else:
-            return {"message": "Invalid Credentials"}, 400
-
-
-class ShutdownVM(Resource):
-    def post(self):
-        args = startvm_argparser.parse_args()
-        name, realm, token, vm_uuid = args.name, args.realm, args.token, args.vmid
-
-        if check_otp(name, realm, token) == 200:
-            vm = client.get(f"/v1/vm/{vm_uuid}", value_in_json=True)
-            if vm:
-                if vm.value["owner"] != name:
-                    return {"message": "Invalid User"}
-                
-                vm.value["status"] = "REQUESTED_SHUTDOWN"
-                client.put(vm.key, json.dumps(vm.value))
-                return {"message": f"VM Shutdown Queued"}
-            else:
-                return {"message": "No such VM found"}
-        else:
-            return {"message": "Invalid Credentials"}, 400
+            return validator.get_errors(), 400
 
 
 class ListUserVM(Resource):
     def get(self):
-        args = uservm_argparser.parse_args()
-        name, realm, token = args.name, args.realm, args.token
+        data = request.json
+        validator = OTPSchema(data)
 
-        if check_otp(name, realm, token) == 200:
+        if validator.is_valid():
             vms = client.get_prefix(f"/v1/vm/", value_in_json=True)
             if vms:
                 return_vms = []
-                user_vms = list(filter(lambda v: v.value["owner"] == name, vms))
+                user_vms = list(filter(lambda v: v.value["owner"] == data["name"], vms))
                 for vm in user_vms:
                     return_vms.append(
                         {
@@ -285,19 +131,19 @@ class ListUserVM(Resource):
             else:
                 return {"message": "No VM found"}, 404
         else:
-            return {"message": "Invalid Credentials"}, 400
+            return validator.get_errors(), 400
 
 
 class ListUserFiles(Resource):
     def get(self):
-        args = uservm_argparser.parse_args()
-        name, realm, token = args.name, args.realm, args.token
+        data = request.json
+        validator = OTPSchema(data)
 
-        if check_otp(name, realm, token) == 200:
+        if validator.is_valid():
             files = client.get_prefix(f"/v1/file/", value_in_json=True)
             if files:
                 return_files = []
-                user_files = list(filter(lambda f: f.value["owner"] == name, files))
+                user_files = list(filter(lambda f: f.value["owner"] == data["name"], files))
                 for file in user_files:
                     return_files.append(
                         {
@@ -309,35 +155,18 @@ class ListUserFiles(Resource):
             else:
                 return {"message": "No File found"}, 404
         else:
-            return {"message": "Invalid Credentials"}, 400
+            return validator.get_errors(), 400
 
 
 class CreateHost(Resource):
     def post(self):
-        args = addhost_argparser.parse_args()
-        name, realm, token, specs, hostname = (
-            args.name,
-            args.realm,
-            args.token,
-            args.specs,
-            args.hostname,
-        )
-
-        if realm == "ungleich-admin" and check_otp(name, realm, token) == 200:
-            # User is good
-            if not specs_parser.transform_specs(specs):
-                return (
-                    {
-                        "message": f"""Invalid unit - Please use following units {specs_parser.get_allowed_units()}"""
-                    },
-                    400,
-                )
-
-            print(specs)
+        data = request.json
+        validator = CreateHostSchema(data)
+        if validator.is_valid():
             host_key = f"/v1/host/{uuid4().hex}"
             host_entry = {
-                "specs": specs,
-                "hostname": hostname,
+                "specs": data["specs"],
+                "hostname": data["hostname"],
                 "status": "DEAD",
                 "last_heartbeat": "",
             }
@@ -345,17 +174,13 @@ class CreateHost(Resource):
 
             return {"message": "Host Created"}, 200
         else:
-            return {"message": "Invalid Credentials/Insufficient Permission"}, 400
+            return validator.get_errors(), 400
 
 
 api.add_resource(CreateVM, "/vm/create")
-api.add_resource(DeleteVM, "/vm/delete")
 api.add_resource(VmStatus, "/vm/status")
 
-api.add_resource(StartVM, "/vm/start")
-api.add_resource(SuspendVM, "/vm/suspend")
-api.add_resource(ResumeVM, "/vm/resume")
-api.add_resource(ShutdownVM, "/vm/shutdown")
+api.add_resource(VMAction, "/vm/action")
 
 api.add_resource(CreateImage, "/image/create")
 api.add_resource(ListPublicImages, "/image/list-public")

schemas.py

@@ -0,0 +1,153 @@
+import json
+
+from common_fields import Field, VmUUIDField, SpecsField
+from helper import check_otp
+from etcd3_wrapper import Etcd3Wrapper
+
+client = Etcd3Wrapper()
+
+
+class BaseSchema(object):
+    def __init__(self, data, fields=None):
+        _ = data
+
+        self.__errors = []
+        if fields is None:
+            self.fields = []
+        else:
+            self.fields = fields
+
+    def validation(self):
+        # custom validation is optional
+        return True
+
+    def is_valid(self):
+        for field in self.fields:
+            field.is_valid()
+            self.add_field_errors(field)
+
+        for parent in self.__class__.__bases__:
+            try:
+                parent.validation(self)
+            except AttributeError:
+                pass
+        if not self.__errors:
+            self.validation()
+
+        if self.__errors:
+            return False
+        return True
+
+    def get_errors(self):
+        return {"Message": self.__errors}
+
+    def add_field_errors(self, field: Field):
+        self.__errors += field.get_errors()
+
+    def add_error(self, error):
+        self.__errors.append(error)
+
+
+class OTPSchema(BaseSchema):
+    def __init__(self, data: dict, fields=None):
+        self.name = Field("name", str, data.get("name", KeyError))
+        self.realm = Field("realm", str, data.get("realm", KeyError))
+        self.token = Field("token", str, data.get("token", KeyError))
+
+        _fields = [self.name, self.realm, self.token]
+        if fields:
+            _fields += fields
+        super().__init__(data=data, fields=_fields)
+
+    def validation(self):
+        rc = check_otp(self.name.value, self.realm.value, self.token.value)
+        if rc != 200:
+            self.add_error("Wrong Credentials")
+
+
+class CreateVMSchema(OTPSchema):
+    def __init__(self, data):
+        self.specs = SpecsField(data)
+
+        self.image_uuid = Field("image_uuid", str, data.get("image_uuid", KeyError))
+        self.image_uuid.validation = self.image_uuid_validation
+
+        fields = [self.specs, self.image_uuid]
+        super().__init__(data=data, fields=fields)
+
+    def image_uuid_validation(self):
+        images = client.get_prefix("/v1/image/")
+
+        if self.image_uuid.value not in [i.key.split("/")[-1] for i in images]:
+            self.add_error("Image UUID not valid")
+
+
+class VMStatusSchema(BaseSchema):
+    def __init__(self, data):
+        self.uuid = VmUUIDField(data)
+
+        fields = [self.uuid]
+
+        super().__init__(data, fields)
+
+
+class CreateImageSchema(BaseSchema):
+    def __init__(self, data):
+        # Fields
+        self.uuid: Field = Field("uuid", str, data.get("uuid", KeyError))
+        self.name = Field("name", str, data.get("name", KeyError))
+        self.image_store = Field("image_store", str, data.get("image_store", KeyError))
+        # Validations
+        self.uuid.validation = self.file_uuid_validation
+
+        # All Fields
+        fields = [self.uuid, self.name, self.image_store]
+        super().__init__(data, fields)
+
+    def file_uuid_validation(self):
+        file_entry = client.get(f"/v1/file/{self.uuid.value}")
+        if file_entry is None:
+            self.add_error(f"Image File with uuid '{self.uuid.value}' Not Found")
+
+    def image_store_name_validation(self):
+        image_stores = list(client.get_prefix("/v1/image_store/"))
+
+        image_store = next(filter(lambda s: json.loads(s.value)["name"] == self.image_store.value,
+                                  image_stores))
+        if not image_store:
+            self.add_error(f"Store '{self.image_store.value}' does not exists")
+
+
+class VmActionSchema(OTPSchema):
+    def __init__(self, data):
+        self.uuid = VmUUIDField(data)
+        self.action = Field("action", str, data.get("action", KeyError))
+
+        self.action.validation = self.action_validation
+
+        fields = [self.uuid, self.action]
+        super().__init__(data=data, fields=fields)
+
+    def action_validation(self):
+        allowed_actions = ["start", "shutdown", "suspend", "resume", "delete"]
+        if self.action.value not in allowed_actions:
+            self.add_error(f"Invalid Action. Allowed Actions are {allowed_actions}")
+
+    def validation(self):
+        vm = client.get(f"/v1/vm/{self.uuid.value}", value_in_json=True)
+        if vm.value["owner"] != self.name:
+            self.add_error("Invalid User")
+
+
+class CreateHostSchema(OTPSchema):
+    def __init__(self, data):
+        self.specs = SpecsField(data)
+        self.hostname = Field("hostname", str, data.get("hostname", KeyError))
+
+        fields = [self.specs, self.hostname]
+
+        super().__init__(data=data, fields=fields)
+
+    def validation(self):
+        if self.realm.value != "ungleich-admin":
+            self.add_error("Invalid Credentials/Insufficient Permission")