351 lines
11 KiB
Python
Executable file
351 lines
11 KiB
Python
Executable file
"""
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This module contain classes thats validates and intercept/modify
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data coming from ucloud-cli (user)
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It was primarily developed as an alternative to argument parser
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of Flask_Restful which is going to be deprecated. I also tried
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marshmallow for that purpose but it was an overkill (because it
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do validation + serialization + deserialization) and little
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inflexible for our purpose.
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"""
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# TODO: Fix error message when user's mentioned VM (referred by name)
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# does not exists.
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#
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# Currently, it says uuid is a required field.
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import json
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import os
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import bitmath
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from ucloud_common.host import HostPool, HostStatus
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from ucloud_common.vm import VmPool, VMStatus
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from common_fields import Field, VmUUIDField, SpecsField
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from helper import check_otp, resolve_vm_name
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from config import etcd_client as client
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from config import (HOST_PREFIX, VM_PREFIX, IMAGE_PREFIX,
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FILE_PREFIX, IMAGE_STORE_PREFIX)
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HOST_POOL = HostPool(client, HOST_PREFIX)
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VM_POOL = VmPool(client, VM_PREFIX)
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class BaseSchema:
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def __init__(self, data, fields=None):
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_ = data # suppress linter warning
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self.__errors = []
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if fields is None:
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self.fields = []
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else:
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self.fields = fields
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def validation(self):
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# custom validation is optional
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return True
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def is_valid(self):
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for field in self.fields:
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field.is_valid()
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self.add_field_errors(field)
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for parent in self.__class__.__bases__:
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try:
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parent.validation(self)
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except AttributeError:
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pass
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if not self.__errors:
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self.validation()
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if self.__errors:
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return False
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return True
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def get_errors(self):
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return {"message": self.__errors}
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def add_field_errors(self, field: Field):
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self.__errors += field.get_errors()
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def add_error(self, error):
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self.__errors.append(error)
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class OTPSchema(BaseSchema):
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def __init__(self, data: dict, fields=None):
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self.name = Field("name", str, data.get("name", KeyError))
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self.realm = Field("realm", str, data.get("realm", KeyError))
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self.token = Field("token", str, data.get("token", KeyError))
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_fields = [self.name, self.realm, self.token]
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if fields:
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_fields += fields
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super().__init__(data=data, fields=_fields)
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def validation(self):
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if check_otp(self.name.value, self.realm.value, self.token.value) != 200:
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self.add_error("Wrong Credentials")
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########################## Image Operations ###############################################
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class CreateImageSchema(BaseSchema):
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def __init__(self, data):
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# Fields
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self.uuid = Field("uuid", str, data.get("uuid", KeyError))
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self.name = Field("name", str, data.get("name", KeyError))
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self.image_store = Field("image_store", str, data.get("image_store", KeyError))
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# Validations
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self.uuid.validation = self.file_uuid_validation
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self.image_store.validation = self.image_store_name_validation
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# All Fields
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fields = [self.uuid, self.name, self.image_store]
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super().__init__(data, fields)
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def file_uuid_validation(self):
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file_entry = client.get(os.path.join(FILE_PREFIX, self.uuid.value))
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if file_entry is None:
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self.add_error(
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"Image File with uuid '{}' Not Found".format(self.uuid.value)
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)
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def image_store_name_validation(self):
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image_stores = list(client.get_prefix(IMAGE_STORE_PREFIX))
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image_store = next(
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filter(
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lambda s: json.loads(s.value)["name"] == self.image_store.value,
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image_stores,
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),
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None,
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)
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if not image_store:
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self.add_error("Store '{}' does not exists".format(self.image_store.value))
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########################## Host Operations ###############################################
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class CreateHostSchema(OTPSchema):
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def __init__(self, data):
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self.specs = SpecsField(data)
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self.hostname = Field("hostname", str, data.get("hostname", KeyError))
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fields = [self.specs, self.hostname]
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super().__init__(data=data, fields=fields)
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def validation(self):
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if self.realm.value != "ungleich-admin":
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self.add_error("Invalid Credentials/Insufficient Permission")
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########################## VM Operations ######################################
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class CreateVMSchema(OTPSchema):
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def __init__(self, data):
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self.parsed_specs = {}
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# Fields
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self.specs = Field("specs", dict, data.get("specs", KeyError))
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self.vm_name = Field("vm_name", str, data.get("vm_name", KeyError))
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self.image_uuid = Field("image_uuid", str, data.get("image_uuid", KeyError))
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# Validation
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self.image_uuid.validation = self.image_uuid_validation
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self.vm_name.validation = self.vm_name_validation
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self.specs.validation = self.specs_validation
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fields = [self.vm_name, self.image_uuid, self.specs]
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super().__init__(data=data, fields=fields)
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def image_uuid_validation(self):
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images = client.get_prefix(IMAGE_PREFIX)
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if self.image_uuid.value not in [i.key.split("/")[-1] for i in images]:
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self.add_error("Image UUID not valid")
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def vm_name_validation(self):
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if resolve_vm_name(name=self.vm_name.value, owner=self.name.value):
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self.add_error(
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'VM with same name "{}" already exists'.format(self.vm_name.value)
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)
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def specs_validation(self):
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ALLOWED_BASE = 10
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_cpu = self.specs.value.get('cpu', KeyError)
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_ram = self.specs.value.get('ram', KeyError)
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_os_ssd = self.specs.value.get('os-ssd', KeyError)
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_hdd = self.specs.value.get('hdd', KeyError)
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if KeyError in [_cpu, _ram, _os_ssd, _hdd]:
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self.add_error("You must specify CPU, RAM and OS-SSD in your specs")
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return None
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try:
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parsed_ram = bitmath.parse_string_unsafe(_ram)
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parsed_os_ssd = bitmath.parse_string_unsafe(_os_ssd)
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if parsed_ram.base != ALLOWED_BASE:
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self.add_error("Your specified RAM is not in correct units")
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if parsed_os_ssd.base != ALLOWED_BASE:
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self.add_error("Your specified OS-SSD is not in correct units")
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if _cpu < 1:
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self.add_error("CPU must be atleast 1")
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if parsed_ram < bitmath.GB(1):
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self.add_error("RAM must be atleast 1 GB")
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if parsed_os_ssd < bitmath.GB(10):
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self.add_error("OS-SSD must be atleast 10 GB")
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parsed_hdd = []
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for hdd in _hdd:
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_parsed_hdd = bitmath.parse_string_unsafe(hdd)
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if _parsed_hdd.base != ALLOWED_BASE:
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self.add_error("Your specified HDD is not in correct units")
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break
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else:
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parsed_hdd.append(str(_parsed_hdd))
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except ValueError:
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# TODO: Find some good error message
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self.add_error("Specs are not correct.")
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else:
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if self.get_errors():
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self.specs = {
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'cpu': _cpu,
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'ram': str(parsed_ram),
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'os-ssd': str(parsed_os_ssd),
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'hdd': parsed_hdd
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}
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class VMStatusSchema(OTPSchema):
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def __init__(self, data):
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data["uuid"] = (
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resolve_vm_name(
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name=data.get("vm_name", None),
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owner=(data.get("in_support_of", None) or data.get("name", None)),
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)
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or KeyError
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)
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self.uuid = VmUUIDField(data)
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fields = [self.uuid]
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super().__init__(data, fields)
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def validation(self):
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vm = VM_POOL.get(self.uuid.value)
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if not (
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vm.value["owner"] == self.name.value or self.realm.value == "ungleich-admin"
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):
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self.add_error("Invalid User")
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class VmActionSchema(OTPSchema):
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def __init__(self, data):
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data["uuid"] = (
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resolve_vm_name(
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name=data.get("vm_name", None),
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owner=(data.get("in_support_of", None) or data.get("name", None)),
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)
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or KeyError
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)
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self.uuid = VmUUIDField(data)
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self.action = Field("action", str, data.get("action", KeyError))
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self.action.validation = self.action_validation
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_fields = [self.uuid, self.action]
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super().__init__(data=data, fields=_fields)
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def action_validation(self):
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allowed_actions = ["start", "stop", "delete"]
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if self.action.value not in allowed_actions:
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self.add_error(
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"Invalid Action. Allowed Actions are {}".format(allowed_actions)
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)
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def validation(self):
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vm = VM_POOL.get(self.uuid.value)
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if not (
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vm.value["owner"] == self.name.value or self.realm.value == "ungleich-admin"
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):
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self.add_error("Invalid User")
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if (
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self.action.value == "start"
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and vm.status == VMStatus.running
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and vm.hostname != ""
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):
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self.add_error("VM Already Running")
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if self.action.value == "stop":
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if vm.status == VMStatus.stopped:
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self.add_error("VM Already Stopped")
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elif vm.status != VMStatus.running:
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self.add_error("Cannot stop non-running VM")
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class VmMigrationSchema(OTPSchema):
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def __init__(self, data):
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data["uuid"] = (
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resolve_vm_name(
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name=data.get("vm_name", None),
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owner=(data.get("in_support_of", None) or data.get("name", None)),
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)
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or KeyError
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)
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self.uuid = VmUUIDField(data)
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self.destination = Field("destination", str, data.get("destination", KeyError))
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self.destination.validation = self.destination_validation
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fields = [self.destination]
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super().__init__(data=data, fields=fields)
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def destination_validation(self):
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host_key = self.destination.value
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host = HOST_POOL.get(host_key)
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if not host:
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self.add_error("No Such Host ({}) exists".format(self.destination.value))
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elif host.status != HostStatus.alive:
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self.add_error("Destination Host is dead")
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def validation(self):
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vm = VM_POOL.get(self.uuid.value)
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if not (
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vm.value["owner"] == self.name.value or self.realm.value == "ungleich-admin"
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):
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self.add_error("Invalid User")
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if vm.status != VMStatus.running:
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self.add_error("Can't migrate non-running VM")
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if vm.hostname == os.path.join(HOST_PREFIX, self.destination.value):
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self.add_error("Destination host couldn't be same as Source Host")
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class AddSSHSchema(OTPSchema):
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def __init__(self, data):
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self.key_name = Field("key_name", str, data.get("key_name", KeyError))
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self.key = Field("key", str, data.get("key_name", KeyError))
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fields = [self.key_name, self.key]
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super().__init__(data=data, fields=fields)
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class RemoveSSHSchema(OTPSchema):
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def __init__(self, data):
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self.key_name = Field("key_name", str, data.get("key_name", KeyError))
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fields = [self.key_name]
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super().__init__(data=data, fields=fields)
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