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Rolled out new request mechanism, vm migration view added

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This commit is contained in:
ahmadbilalkhalid 2019-08-11 22:01:27 +05:00
parent 47b0ba7719
commit 080933b140
4 changed files with 137 additions and 37 deletions
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3
.gitmodules vendored
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@ -1,3 +0,0 @@
[submodule "etcd3_wrapper"]
path = etcd3_wrapper
url = https://code.ungleich.ch/ahmedbilal/etcd3_wrapper

1
etcd3_wrapper

@ -1 +0,0 @@
Subproject commit cb2a416a17d6789e613ba3b9957917770f4211e1

117
main.py
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@ -3,45 +3,63 @@
# any user vm.
import json
import subprocess
from flask import Flask, request
from flask_restful import Resource, Api
from uuid import uuid4
from etcd3_wrapper import Etcd3Wrapper
from os.path import join
from ucloud_common.vm import VmPool, VMStatus
from ucloud_common.host import HostPool
from ucloud_common.request import RequestEntry, RequestPool, RequestType
from schemas import (CreateVMSchema, VMStatusSchema,
CreateImageSchema, VmActionSchema,
OTPSchema, CreateHostSchema)
OTPSchema, CreateHostSchema,
VmMigrationSchema)
app = Flask(__name__)
api = Api(app)
client = Etcd3Wrapper()
vm_pool = VmPool(client, "/v1/vm")
host_pool = HostPool(client, "/v1/host")
request_pool = RequestPool(client, "/v1/request")
class CreateVM(Resource):
def post(self):
@staticmethod
def post():
data = request.json
validator = CreateVMSchema(data)
if validator.is_valid():
vm_key = f"/v1/vm/{uuid4().hex}"
# Create VM Entry under /v1/vm/
vm_uuid = uuid4().hex
vm_key = f"/v1/vm/{vm_uuid}"
vm_entry = {
"owner": data["name"],
"specs": data["specs"],
"hostname": "",
"status": "REQUESTED_NEW",
"status": "",
"image_uuid": data["image_uuid"],
"log": []
}
client.put(vm_key, vm_entry, value_in_json=True)
# Create ScheduleVM Request
r = RequestEntry.from_scratch(type=RequestType.ScheduleVM,
uuid=vm_uuid)
request_pool.put(r)
return {"message": "VM Creation Queued"}, 200
else:
return validator.get_errors(), 400
class VmStatus(Resource):
def get(self):
@staticmethod
def get():
data = request.json
validator = VMStatusSchema(data)
if validator.is_valid():
@ -52,7 +70,8 @@ class VmStatus(Resource):
class CreateImage(Resource):
def post(self):
@staticmethod
def post():
data = request.json
validator = CreateImageSchema(data)
if validator.is_valid():
@ -69,13 +88,14 @@ class CreateImage(Resource):
}
client.put(f"/v1/image/{data['uuid']}", json.dumps(image_entry_json))
return {"Message": "Image successfully created"}
return {"message": "Image successfully created"}
else:
return validator.get_errors(), 400
class ListPublicImages(Resource):
def get(self):
@staticmethod
def get():
images = client.get_prefix("/v1/image/")
r = {}
for image in images:
@ -85,32 +105,64 @@ class ListPublicImages(Resource):
class VMAction(Resource):
def post(self):
@staticmethod
def post():
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
vm_entry = vm_pool.get(f"/v1/vm/{data['uuid']}")
action = data["action"]
client.put(vm.key, json.dumps(vm.value))
return {"message": f"VM Start Queued"}
if action == "start":
vm_entry.status = VMStatus.requested_start
vm_pool.put(vm_entry)
action = "schedule"
if action == "delete" and vm_entry.hostname == "":
try:
path_without_protocol = vm_entry.path[vm_entry.path.find(":")+1:]
rc = subprocess.call(f"rbd rm {path_without_protocol}".split(" "))
except FileNotFoundError:
return {"message": "VM image does not exists"}
else:
if rc == 0:
client.client.delete(vm_entry.key)
return {"message": "VM successfully deleted"}
else:
return {"message": "Some error occurred while deleting VM"}
r = RequestEntry.from_scratch(type=f"{action.title()}VM",
uuid=data['uuid'],
hostname=vm_entry.hostname)
request_pool.put(r)
return {"message": f"VM {action.title()} Queued"}, 200
else:
return validator.get_errors(), 400
class VMMigration(Resource):
@staticmethod
def post():
data = request.json
validator = VmMigrationSchema(data)
if validator.is_valid():
vm = vm_pool.get(data['uuid'])
r = RequestEntry.from_scratch(type=RequestType.ScheduleVM,
uuid=vm.uuid,
destination=join("/v1/host", data["destination"]),
migration=True)
request_pool.put(r)
return {"message": f"VM Migration Initialization Queued"}, 200
else:
return validator.get_errors(), 400
class ListUserVM(Resource):
def get(self):
@staticmethod
def get():
data = request.json
validator = OTPSchema(data)
@ -135,7 +187,8 @@ class ListUserVM(Resource):
class ListUserFiles(Resource):
def get(self):
@staticmethod
def get():
data = request.json
validator = OTPSchema(data)
@ -159,7 +212,8 @@ class ListUserFiles(Resource):
class CreateHost(Resource):
def post(self):
@staticmethod
def post():
data = request.json
validator = CreateHostSchema(data)
if validator.is_valid():
@ -177,10 +231,19 @@ class CreateHost(Resource):
return validator.get_errors(), 400
class ListHost(Resource):
@staticmethod
def get():
hosts = host_pool.hosts
r = {host.key: {"status": host.status, "specs": host.specs, "hostname": host.hostname} for host in hosts}
return r, 200
api.add_resource(CreateVM, "/vm/create")
api.add_resource(VmStatus, "/vm/status")
api.add_resource(VMAction, "/vm/action")
api.add_resource(VMMigration, "/vm/migrate")
api.add_resource(CreateImage, "/image/create")
api.add_resource(ListPublicImages, "/image/list-public")
@ -189,7 +252,7 @@ api.add_resource(ListUserVM, "/user/vms")
api.add_resource(ListUserFiles, "/user/files")
api.add_resource(CreateHost, "/host/create")
api.add_resource(ListHost, "/host/list")
if __name__ == "__main__":
app.run(host="::", debug=True)

53
schemas.py
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@ -1,10 +1,15 @@
import json
from common_fields import Field, VmUUIDField, SpecsField
from ucloud_common.host import HostPool, HostStatus
from ucloud_common.vm import VmPool, VMStatus
from helper import check_otp
from etcd3_wrapper import Etcd3Wrapper
from os.path import join
client = Etcd3Wrapper()
host_pool = HostPool(client, "/v1/host")
vm_pool = VmPool(client, "/v1/vm")
class BaseSchema(object):
@ -39,7 +44,7 @@ class BaseSchema(object):
return True
def get_errors(self):
return {"Message": self.__errors}
return {"message": self.__errors}
def add_field_errors(self, field: Field):
self.__errors += field.get_errors()
@ -125,19 +130,55 @@ class VmActionSchema(OTPSchema):
self.action.validation = self.action_validation
fields = [self.uuid, self.action]
super().__init__(data=data, fields=fields)
_fields = [self.uuid, self.action]
super().__init__(data=data, fields=_fields)
def action_validation(self):
allowed_actions = ["start", "shutdown", "suspend", "resume", "delete"]
allowed_actions = ["start", "stop", "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:
vm = vm_pool.get(self.uuid.value)
if vm.value["owner"] != self.name.value:
self.add_error("Invalid User")
if self.action.value == "start" and vm.status == VMStatus.running and vm.hostname != "":
self.add_error("VM Already Running")
if self.action.value == "stop" and vm.status == VMStatus.stopped:
self.add_error("VM Already Stopped")
class VmMigrationSchema(OTPSchema):
def __init__(self, data):
self.uuid = VmUUIDField(data)
self.destination = Field("destination", str, data.get("destination", KeyError))
self.destination.validation = self.destination_validation
fields = [self.destination]
super().__init__(data=data, fields=fields)
def destination_validation(self):
host_key = self.destination.value
host = host_pool.get(host_key)
if not host:
self.add_error(f"No Such Host ({self.destination.value}) exists")
elif host.status != HostStatus.alive:
self.add_error("Destination Host is dead")
def validation(self):
vm = vm_pool.get(self.uuid.value)
if vm.owner != self.name.value:
self.add_error("Invalid User")
if vm.status != VMStatus.running:
self.add_error("Can't migrate non-running VM")
if vm.hostname == join("/v1/host", self.destination.value):
self.add_error("Destination host couldn't be same as Source Host")
class CreateHostSchema(OTPSchema):
def __init__(self, data):