import json
import pynetbox
import logging
from uuid import uuid4
from os.path import join as join_path
from flask import Flask, request
from flask_restful import Resource, Api
from werkzeug.exceptions import HTTPException
from ucloud.common import counters
from ucloud.common.vm import VMStatus
from ucloud.common.request import RequestEntry, RequestType
from ucloud.settings import settings
from ucloud.shared import shared
from . import schemas
from .helper import generate_mac, mac2ipv6
logger = logging.getLogger(__name__)
app = Flask(__name__)
api = Api(app)
app.logger.handlers.clear()
@app.errorhandler(Exception)
def handle_exception(e):
app.logger.error(e)
# pass through HTTP errors
if isinstance(e, HTTPException):
return e
# now you're handling non-HTTP exceptions only
return {"message": "Server Error"}, 500
class CreateVM(Resource):
"""API Request to Handle Creation of VM"""
@staticmethod
def post():
data = request.json
validator = schemas.CreateVMSchema(data)
if validator.is_valid():
vm_uuid = uuid4().hex
vm_key = join_path(settings["etcd"]["vm_prefix"], vm_uuid)
specs = {
"cpu": validator.specs["cpu"],
"ram": validator.specs["ram"],
"os-ssd": validator.specs["os-ssd"],
"hdd": validator.specs["hdd"],
}
macs = [generate_mac() for _ in range(len(data["network"]))]
tap_ids = [
counters.increment_etcd_counter(
shared.etcd_client, "/v1/counter/tap"
)
for _ in range(len(data["network"]))
]
vm_entry = {
"name": data["vm_name"],
"owner": data["name"],
"owner_realm": data["realm"],
"specs": specs,
"hostname": "",
"status": VMStatus.stopped,
"image_uuid": validator.image_uuid,
"log": [],
"vnc_socket": "",
"network": list(zip(data["network"], macs, tap_ids)),
"metadata": {"ssh-keys": []},
"in_migration": False,
}
shared.etcd_client.put(vm_key, vm_entry, value_in_json=True)
# Create ScheduleVM Request
r = RequestEntry.from_scratch(
type=RequestType.ScheduleVM,
uuid=vm_uuid,
request_prefix=settings["etcd"]["request_prefix"],
)
shared.request_pool.put(r)
return {"message": "VM Creation Queued"}, 200
return validator.get_errors(), 400
class VmStatus(Resource):
@staticmethod
def get():
data = request.json
validator = schemas.VMStatusSchema(data)
if validator.is_valid():
vm = shared.vm_pool.get(
join_path(settings["etcd"]["vm_prefix"], data["uuid"])
)
vm_value = vm.value.copy()
vm_value["ip"] = []
for network_mac_and_tap in vm.network:
network_name, mac, tap = network_mac_and_tap
network = shared.etcd_client.get(
join_path(
settings["etcd"]["network_prefix"],
data["name"],
network_name,
),
value_in_json=True,
)
ipv6_addr = (
network.value.get("ipv6").split("::")[0] + "::"
)
vm_value["ip"].append(mac2ipv6(mac, ipv6_addr))
vm.value = vm_value
return vm.value
else:
return validator.get_errors(), 400
class CreateImage(Resource):
@staticmethod
def post():
data = request.json
validator = schemas.CreateImageSchema(data)
if validator.is_valid():
file_entry = shared.etcd_client.get(
join_path(settings["etcd"]["file_prefix"], data["uuid"])
)
file_entry_value = json.loads(file_entry.value)
image_entry_json = {
"status": "TO_BE_CREATED",
"owner": file_entry_value["owner"],
"filename": file_entry_value["filename"],
"name": data["name"],
"store_name": data["image_store"],
"visibility": "public",
}
shared.etcd_client.put(
join_path(
settings["etcd"]["image_prefix"], data["uuid"]
),
json.dumps(image_entry_json),
)
return {"message": "Image queued for creation."}
return validator.get_errors(), 400
class ListPublicImages(Resource):
@staticmethod
def get():
images = shared.etcd_client.get_prefix(
settings["etcd"]["image_prefix"], value_in_json=True
)
r = {"images": []}
for image in images:
image_key = "{}:{}".format(
image.value["store_name"], image.value["name"]
)
r["images"].append(
{"name": image_key, "status": image.value["status"]}
)
return r, 200
class VMAction(Resource):
@staticmethod
def post():
data = request.json
validator = schemas.VmActionSchema(data)
if validator.is_valid():
vm_entry = shared.vm_pool.get(
join_path(settings["etcd"]["vm_prefix"], data["uuid"])
)
action = data["action"]
if action == "start":
action = "schedule"
if action == "delete" and vm_entry.hostname == "":
if shared.storage_handler.is_vm_image_exists(
vm_entry.uuid
):
r_status = shared.storage_handler.delete_vm_image(
vm_entry.uuid
)
if r_status:
shared.etcd_client.client.delete(vm_entry.key)
return {"message": "VM successfully deleted"}
else:
logger.error(
"Some Error Occurred while deleting VM"
)
return {"message": "VM deletion unsuccessfull"}
else:
shared.etcd_client.client.delete(vm_entry.key)
return {"message": "VM successfully deleted"}
r = RequestEntry.from_scratch(
type="{}VM".format(action.title()),
uuid=data["uuid"],
hostname=vm_entry.hostname,
request_prefix=settings["etcd"]["request_prefix"],
)
shared.request_pool.put(r)
return (
{"message": "VM {} Queued".format(action.title())},
200,
)
else:
return validator.get_errors(), 400
class VMMigration(Resource):
@staticmethod
def post():
data = request.json
validator = schemas.VmMigrationSchema(data)
if validator.is_valid():
vm = shared.vm_pool.get(data["uuid"])
r = RequestEntry.from_scratch(
type=RequestType.InitVMMigration,
uuid=vm.uuid,
hostname=join_path(
settings["etcd"]["host_prefix"],
validator.destination.value,
),
request_prefix=settings["etcd"]["request_prefix"],
)
shared.request_pool.put(r)
return (
{"message": "VM Migration Initialization Queued"},
200,
)
else:
return validator.get_errors(), 400
class ListUserVM(Resource):
@staticmethod
def get():
data = request.json
validator = schemas.OTPSchema(data)
if validator.is_valid():
vms = shared.etcd_client.get_prefix(
settings["etcd"]["vm_prefix"], value_in_json=True
)
return_vms = []
user_vms = filter(
lambda v: v.value["owner"] == data["name"], vms
)
for vm in user_vms:
return_vms.append(
{
"name": vm.value["name"],
"vm_uuid": vm.key.split("/")[-1],
"specs": vm.value["specs"],
"status": vm.value["status"],
"hostname": vm.value["hostname"],
"vnc_socket": vm.value.get("vnc_socket", None),
}
)
if return_vms:
return {"message": return_vms}, 200
return {"message": "No VM found"}, 404
else:
return validator.get_errors(), 400
class ListUserFiles(Resource):
@staticmethod
def get():
data = request.json
validator = schemas.OTPSchema(data)
if validator.is_valid():
files = shared.etcd_client.get_prefix(
settings["etcd"]["file_prefix"], value_in_json=True
)
return_files = []
user_files = list(
filter(
lambda f: f.value["owner"] == data["name"], files
)
)
for file in user_files:
return_files.append(
{
"filename": file.value["filename"],
"uuid": file.key.split("/")[-1],
}
)
return {"message": return_files}, 200
else:
return validator.get_errors(), 400
class CreateHost(Resource):
@staticmethod
def post():
data = request.json
validator = schemas.CreateHostSchema(data)
if validator.is_valid():
host_key = join_path(
settings["etcd"]["host_prefix"], uuid4().hex
)
host_entry = {
"specs": data["specs"],
"hostname": data["hostname"],
"status": "DEAD",
"last_heartbeat": "",
}
shared.etcd_client.put(
host_key, host_entry, value_in_json=True
)
return {"message": "Host Created"}, 200
return validator.get_errors(), 400
class ListHost(Resource):
@staticmethod
def get():
hosts = shared.host_pool.hosts
r = {
host.key: {
"status": host.status,
"specs": host.specs,
"hostname": host.hostname,
}
for host in hosts
}
return r, 200
class GetSSHKeys(Resource):
@staticmethod
def get():
data = request.json
validator = schemas.GetSSHSchema(data)
if validator.is_valid():
if not validator.key_name.value:
# {user_prefix}/{realm}/{name}/key/
etcd_key = join_path(
settings["etcd"]["user_prefix"],
data["realm"],
data["name"],
"key",
)
etcd_entry = shared.etcd_client.get_prefix(
etcd_key, value_in_json=True
)
keys = {
key.key.split("/")[-1]: key.value
for key in etcd_entry
}
return {"keys": keys}
else:
# {user_prefix}/{realm}/{name}/key/{key_name}
etcd_key = join_path(
settings["etcd"]["user_prefix"],
data["realm"],
data["name"],
"key",
data["key_name"],
)
etcd_entry = shared.etcd_client.get(
etcd_key, value_in_json=True
)
if etcd_entry:
return {
"keys": {
etcd_entry.key.split("/")[
-1
]: etcd_entry.value
}
}
else:
return {"keys": {}}
else:
return validator.get_errors(), 400
class AddSSHKey(Resource):
@staticmethod
def post():
data = request.json
validator = schemas.AddSSHSchema(data)
if validator.is_valid():
# {user_prefix}/{realm}/{name}/key/{key_name}
etcd_key = join_path(
settings["etcd"]["user_prefix"],
data["realm"],
data["name"],
"key",
data["key_name"],
)
etcd_entry = shared.etcd_client.get(
etcd_key, value_in_json=True
)
if etcd_entry:
return {
"message": "Key with name '{}' already exists".format(
data["key_name"]
)
}
else:
# Key Not Found. It implies user' haven't added any key yet.
shared.etcd_client.put(
etcd_key, data["key"], value_in_json=True
)
return {"message": "Key added successfully"}
else:
return validator.get_errors(), 400
class RemoveSSHKey(Resource):
@staticmethod
def get():
data = request.json
validator = schemas.RemoveSSHSchema(data)
if validator.is_valid():
# {user_prefix}/{realm}/{name}/key/{key_name}
etcd_key = join_path(
settings["etcd"]["user_prefix"],
data["realm"],
data["name"],
"key",
data["key_name"],
)
etcd_entry = shared.etcd_client.get(
etcd_key, value_in_json=True
)
if etcd_entry:
shared.etcd_client.client.delete(etcd_key)
return {"message": "Key successfully removed."}
else:
return {
"message": "No Key with name '{}' Exists at all.".format(
data["key_name"]
)
}
else:
return validator.get_errors(), 400
class CreateNetwork(Resource):
@staticmethod
def post():
data = request.json
validator = schemas.CreateNetwork(data)
if validator.is_valid():
network_entry = {
"id": counters.increment_etcd_counter(
shared.etcd_client, "/v1/counter/vxlan"
),
"type": data["type"],
}
if validator.user.value:
try:
nb = pynetbox.api(
url=settings["netbox"]["url"],
token=settings["netbox"]["token"],
)
nb_prefix = nb.ipam.prefixes.get(
prefix=settings["network"]["prefix"]
)
prefix = nb_prefix.available_prefixes.create(
data={
"prefix_length": int(
settings["network"]["prefix_length"]
),
"description": '{}\'s network "{}"'.format(
data["name"], data["network_name"]
),
"is_pool": True,
}
)
except Exception as err:
app.logger.error(err)
return {
"message": "Error occured while creating network."
}
else:
network_entry["ipv6"] = prefix["prefix"]
else:
network_entry["ipv6"] = "fd00::/64"
network_key = join_path(
settings["etcd"]["network_prefix"],
data["name"],
data["network_name"],
)
shared.etcd_client.put(
network_key, network_entry, value_in_json=True
)
return {"message": "Network successfully added."}
else:
return validator.get_errors(), 400
class ListUserNetwork(Resource):
@staticmethod
def get():
data = request.json
validator = schemas.OTPSchema(data)
if validator.is_valid():
prefix = join_path(
settings["etcd"]["network_prefix"], data["name"]
)
networks = shared.etcd_client.get_prefix(
prefix, value_in_json=True
)
user_networks = []
for net in networks:
net.value["name"] = net.key.split("/")[-1]
user_networks.append(net.value)
return {"networks": user_networks}, 200
else:
return validator.get_errors(), 400
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")
api.add_resource(ListUserVM, "/user/vms")
api.add_resource(ListUserFiles, "/user/files")
api.add_resource(ListUserNetwork, "/user/networks")
api.add_resource(AddSSHKey, "/user/add-ssh")
api.add_resource(RemoveSSHKey, "/user/remove-ssh")
api.add_resource(GetSSHKeys, "/user/get-ssh")
api.add_resource(CreateHost, "/host/create")
api.add_resource(ListHost, "/host/list")
api.add_resource(CreateNetwork, "/network/create")
def main():
image_stores = list(
shared.etcd_client.get_prefix(
settings["etcd"]["image_store_prefix"], value_in_json=True
)
)
if not image_stores:
data = {
"is_public": True,
"type": "ceph",
"name": "images",
"description": "first ever public image-store",
"attributes": {"list": [], "key": [], "pool": "images"},
}
shared.etcd_client.put(
join_path(
settings["etcd"]["image_store_prefix"], uuid4().hex
),
json.dumps(data),
)
app.run(host="::", debug=False)
if __name__ == "__main__":
main()