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Refactoring, Removal of most global vars, config default path is ~/ucloud/

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This commit is contained in:
ahmadbilalkhalid 2019-12-22 12:26:48 +05:00
parent bc58a6ed9c
commit 04993e4106
23 changed files with 673 additions and 726 deletions
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31
scripts/ucloud
View file

@ -3,29 +3,23 @@
import argparse
import logging
import importlib
import os
import multiprocessing as mp
import sys
from ucloud.configure.main import update_config, configure_parser
from ucloud.configure.main import configure_parser
def exception_hook(exc_type, exc_value, exc_traceback):
logger.error(
"Uncaught exception",
exc_info=(exc_type, exc_value, exc_traceback)
)
print(exc_type, exc_value)
logger.error(
'Uncaught exception',
exc_info=(exc_type, exc_value, exc_traceback)
)
print('Error: ', end='')
print(exc_type, exc_value, exc_traceback)
if __name__ == '__main__':
logging.basicConfig(level=logging.DEBUG,
format='%(pathname)s:%(lineno)d -- %(levelname)-8s %(message)s',
filename='/var/log/ucloud.log', filemode='a')
logger = logging.getLogger("ucloud")
sys.excepthook = exception_hook
mp.set_start_method('spawn')
arg_parser = argparse.ArgumentParser()
subparsers = arg_parser.add_subparsers(dest="command")
@ -50,13 +44,20 @@ if __name__ == '__main__':
if not args.command:
arg_parser.print_help()
else:
logging.basicConfig(
level=logging.DEBUG,
format='%(pathname)s:%(lineno)d -- %(levelname)-8s %(message)s',
handlers=[logging.handlers.SysLogHandler(address = '/dev/log')]
)
logger = logging.getLogger("ucloud")
mp.set_start_method('spawn')
arguments = vars(args)
try:
name = arguments.pop('command')
mod = importlib.import_module("ucloud.{}.main".format(name))
main = getattr(mod, "main")
main(**arguments)
except Exception as e:
logger.exception(e)
logger.exception('Error')
print(e)

4
setup.py
View file

@ -1,3 +1,5 @@
import os
from setuptools import setup, find_packages
with open("README.md", "r") as fh:
@ -39,5 +41,5 @@ setup(name='ucloud',
'etcd3 @ https://github.com/kragniz/python-etcd3/tarball/master#egg=etcd3',
],
scripts=['scripts/ucloud'],
data_files=[('/etc/ucloud/', ['conf/ucloud.conf'])],
data_files=[(os.path.expanduser('~/ucloud/'), ['conf/ucloud.conf'])],
zip_safe=False)

6
ucloud/api/common_fields.py
View file

@ -1,6 +1,8 @@
import os
from ucloud.config import etcd_client, config
from ucloud.shared import shared
from ucloud.settings import settings
class Optional:
pass
@ -47,6 +49,6 @@ class VmUUIDField(Field):
self.validation = self.vm_uuid_validation
def vm_uuid_validation(self):
r = etcd_client.get(os.path.join(config['etcd']['vm_prefix'], self.uuid))
r = shared.etcd_client.get(os.path.join(settings['etcd']['vm_prefix'], self.uuid))
if not r:
self.add_error("VM with uuid {} does not exists".format(self.uuid))

5
ucloud/api/create_image_store.py
View file

@ -3,7 +3,8 @@ import os
from uuid import uuid4
from ucloud.config import etcd_client, config
from ucloud.shared import shared
from ucloud.settings import settings
data = {
"is_public": True,
@ -13,4 +14,4 @@ data = {
"attributes": {"list": [], "key": [], "pool": "images"},
}
etcd_client.put(os.path.join(config['etcd']['image_store_prefix'], uuid4().hex), json.dumps(data))
shared.etcd_client.put(os.path.join(settings['etcd']['image_store_prefix'], uuid4().hex), json.dumps(data))

18
ucloud/api/helper.py
View file

@ -7,29 +7,29 @@ import requests
from pyotp import TOTP
from ucloud.config import vm_pool, config
from ucloud.shared import shared
from ucloud.settings import settings
logger = logging.getLogger("ucloud.api.helper")
def check_otp(name, realm, token):
try:
data = {
"auth_name": config['otp']['auth_name'],
"auth_token": TOTP(config['otp']['auth_seed']).now(),
"auth_realm": config['otp']['auth_realm'],
"auth_name": settings['otp']['auth_name'],
"auth_token": TOTP(settings['otp']['auth_seed']).now(),
"auth_realm": settings['otp']['auth_realm'],
"name": name,
"realm": realm,
"token": token,
}
except binascii.Error as err:
logger.error(
"Cannot compute OTP for seed: {}".format(config['otp']['auth_seed'])
"Cannot compute OTP for seed: {}".format(settings['otp']['auth_seed'])
)
return 400
response = requests.post(
config['otp']['verification_controller_url'], json=data
settings['otp']['verification_controller_url'], json=data
)
return response.status_code
@ -43,7 +43,7 @@ def resolve_vm_name(name, owner):
result = next(
filter(
lambda vm: vm.value["owner"] == owner and vm.value["name"] == name,
vm_pool.vms,
shared.vm_pool.vms,
),
None,
)
@ -81,7 +81,7 @@ def resolve_image_name(name, etcd_client):
except Exception:
raise ValueError("Image name not in correct format i.e {store_name}:{image_name}")
images = etcd_client.get_prefix(config['etcd']['image_prefix'], value_in_json=True)
images = etcd_client.get_prefix(settings['etcd']['image_prefix'], value_in_json=True)
# Try to find image with name == image_name and store_name == store_name
try:

118
ucloud/api/main.py
View file

@ -10,10 +10,9 @@ from flask_restful import Resource, Api
from ucloud.common import counters
from ucloud.common.vm import VMStatus
from ucloud.common.request import RequestEntry, RequestType
from ucloud.config import (
etcd_client, request_pool, vm_pool,
host_pool, config, image_storage_handler
)
from ucloud.settings import settings
from ucloud.shared import shared
from . import schemas
from .helper import generate_mac, mac2ipv6
from . import logger
@ -31,7 +30,7 @@ class CreateVM(Resource):
validator = schemas.CreateVMSchema(data)
if validator.is_valid():
vm_uuid = uuid4().hex
vm_key = join_path(config['etcd']['vm_prefix'], vm_uuid)
vm_key = join_path(settings['etcd']['vm_prefix'], vm_uuid)
specs = {
"cpu": validator.specs["cpu"],
"ram": validator.specs["ram"],
@ -39,7 +38,7 @@ class CreateVM(Resource):
"hdd": validator.specs["hdd"],
}
macs = [generate_mac() for _ in range(len(data["network"]))]
tap_ids = [counters.increment_etcd_counter(etcd_client, "/v1/counter/tap")
tap_ids = [counters.increment_etcd_counter(shared.etcd_client, "/v1/counter/tap")
for _ in range(len(data["network"]))]
vm_entry = {
"name": data["vm_name"],
@ -54,14 +53,14 @@ class CreateVM(Resource):
"network": list(zip(data["network"], macs, tap_ids)),
"metadata": {"ssh-keys": []},
}
etcd_client.put(vm_key, vm_entry, value_in_json=True)
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=config['etcd']['request_prefix']
request_prefix=settings['etcd']['request_prefix']
)
request_pool.put(r)
shared.request_pool.put(r)
return {"message": "VM Creation Queued"}, 200
return validator.get_errors(), 400
@ -73,16 +72,16 @@ class VmStatus(Resource):
data = request.json
validator = schemas.VMStatusSchema(data)
if validator.is_valid():
vm = vm_pool.get(
join_path(config['etcd']['vm_prefix'], data["uuid"])
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 = etcd_client.get(
network = shared.etcd_client.get(
join_path(
config['etcd']['network_prefix'],
settings['etcd']['network_prefix'],
data["name"],
network_name,
),
@ -102,8 +101,8 @@ class CreateImage(Resource):
data = request.json
validator = schemas.CreateImageSchema(data)
if validator.is_valid():
file_entry = etcd_client.get(
join_path(config['etcd']['file_prefix'], data["uuid"])
file_entry = shared.etcd_client.get(
join_path(settings['etcd']['file_prefix'], data["uuid"])
)
file_entry_value = json.loads(file_entry.value)
@ -115,8 +114,8 @@ class CreateImage(Resource):
"store_name": data["image_store"],
"visibility": "public",
}
etcd_client.put(
join_path(config['etcd']['image_prefix'], data["uuid"]),
shared.etcd_client.put(
join_path(settings['etcd']['image_prefix'], data["uuid"]),
json.dumps(image_entry_json),
)
@ -127,8 +126,8 @@ class CreateImage(Resource):
class ListPublicImages(Resource):
@staticmethod
def get():
images = etcd_client.get_prefix(
config['etcd']['image_prefix'], value_in_json=True
images = shared.etcd_client.get_prefix(
settings['etcd']['image_prefix'], value_in_json=True
)
r = {
"images": []
@ -150,8 +149,8 @@ class VMAction(Resource):
validator = schemas.VmActionSchema(data)
if validator.is_valid():
vm_entry = vm_pool.get(
join_path(config['etcd']['vm_prefix'], data["uuid"])
vm_entry = shared.vm_pool.get(
join_path(settings['etcd']['vm_prefix'], data["uuid"])
)
action = data["action"]
@ -159,25 +158,25 @@ class VMAction(Resource):
action = "schedule"
if action == "delete" and vm_entry.hostname == "":
if image_storage_handler.is_vm_image_exists(vm_entry.uuid):
r_status = image_storage_handler.delete_vm_image(vm_entry.uuid)
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:
etcd_client.client.delete(vm_entry.key)
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:
etcd_client.client.delete(vm_entry.key)
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=config['etcd']['request_prefix']
request_prefix=settings['etcd']['request_prefix']
)
request_pool.put(r)
shared.request_pool.put(r)
return {"message": "VM {} Queued".format(action.title())}, 200
else:
return validator.get_errors(), 400
@ -190,18 +189,18 @@ class VMMigration(Resource):
validator = schemas.VmMigrationSchema(data)
if validator.is_valid():
vm = vm_pool.get(data["uuid"])
vm = shared.vm_pool.get(data["uuid"])
r = RequestEntry.from_scratch(
type=RequestType.ScheduleVM,
uuid=vm.uuid,
destination=join_path(
config['etcd']['host_prefix'], validator.destination.value
settings['etcd']['host_prefix'], validator.destination.value
),
migration=True,
request_prefix=config['etcd']['request_prefix']
request_prefix=settings['etcd']['request_prefix']
)
request_pool.put(r)
shared.request_pool.put(r)
return {"message": "VM Migration Initialization Queued"}, 200
else:
return validator.get_errors(), 400
@ -214,8 +213,8 @@ class ListUserVM(Resource):
validator = schemas.OTPSchema(data)
if validator.is_valid():
vms = etcd_client.get_prefix(
config['etcd']['vm_prefix'], value_in_json=True
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)
@ -227,7 +226,6 @@ class ListUserVM(Resource):
"specs": vm.value["specs"],
"status": vm.value["status"],
"hostname": vm.value["hostname"],
# "mac": vm.value["mac"],
"vnc_socket": None
if vm.value.get("vnc_socket", None) is None
else vm.value["vnc_socket"],
@ -248,8 +246,8 @@ class ListUserFiles(Resource):
validator = schemas.OTPSchema(data)
if validator.is_valid():
files = etcd_client.get_prefix(
config['etcd']['file_prefix'], value_in_json=True
files = shared.etcd_client.get_prefix(
settings['etcd']['file_prefix'], value_in_json=True
)
return_files = []
user_files = list(
@ -273,14 +271,14 @@ class CreateHost(Resource):
data = request.json
validator = schemas.CreateHostSchema(data)
if validator.is_valid():
host_key = join_path(config['etcd']['host_prefix'], uuid4().hex)
host_key = join_path(settings['etcd']['host_prefix'], uuid4().hex)
host_entry = {
"specs": data["specs"],
"hostname": data["hostname"],
"status": "DEAD",
"last_heartbeat": "",
}
etcd_client.put(host_key, host_entry, value_in_json=True)
shared.etcd_client.put(host_key, host_entry, value_in_json=True)
return {"message": "Host Created"}, 200
@ -290,7 +288,7 @@ class CreateHost(Resource):
class ListHost(Resource):
@staticmethod
def get():
hosts = host_pool.hosts
hosts = shared.host_pool.hosts
r = {
host.key: {
"status": host.status,
@ -312,12 +310,12 @@ class GetSSHKeys(Resource):
# {user_prefix}/{realm}/{name}/key/
etcd_key = join_path(
config['etcd']['user_prefix'],
settings['etcd']['user_prefix'],
data["realm"],
data["name"],
"key",
)
etcd_entry = etcd_client.get_prefix(
etcd_entry = shared.etcd_client.get_prefix(
etcd_key, value_in_json=True
)
@ -329,13 +327,13 @@ class GetSSHKeys(Resource):
# {user_prefix}/{realm}/{name}/key/{key_name}
etcd_key = join_path(
config['etcd']['user_prefix'],
settings['etcd']['user_prefix'],
data["realm"],
data["name"],
"key",
data["key_name"],
)
etcd_entry = etcd_client.get(etcd_key, value_in_json=True)
etcd_entry = shared.etcd_client.get(etcd_key, value_in_json=True)
if etcd_entry:
return {
@ -358,13 +356,13 @@ class AddSSHKey(Resource):
# {user_prefix}/{realm}/{name}/key/{key_name}
etcd_key = join_path(
config['etcd']['user_prefix'],
settings['etcd']['user_prefix'],
data["realm"],
data["name"],
"key",
data["key_name"],
)
etcd_entry = etcd_client.get(etcd_key, value_in_json=True)
etcd_entry = shared.etcd_client.get(etcd_key, value_in_json=True)
if etcd_entry:
return {
"message": "Key with name '{}' already exists".format(
@ -373,7 +371,7 @@ class AddSSHKey(Resource):
}
else:
# Key Not Found. It implies user' haven't added any key yet.
etcd_client.put(etcd_key, data["key"], value_in_json=True)
shared.etcd_client.put(etcd_key, data["key"], value_in_json=True)
return {"message": "Key added successfully"}
else:
return validator.get_errors(), 400
@ -388,15 +386,15 @@ class RemoveSSHKey(Resource):
# {user_prefix}/{realm}/{name}/key/{key_name}
etcd_key = join_path(
config['etcd']['user_prefix'],
settings['etcd']['user_prefix'],
data["realm"],
data["name"],
"key",
data["key_name"],
)
etcd_entry = etcd_client.get(etcd_key, value_in_json=True)
etcd_entry = shared.etcd_client.get(etcd_key, value_in_json=True)
if etcd_entry:
etcd_client.client.delete(etcd_key)
shared.etcd_client.client.delete(etcd_key)
return {"message": "Key successfully removed."}
else:
return {
@ -418,22 +416,22 @@ class CreateNetwork(Resource):
network_entry = {
"id": counters.increment_etcd_counter(
etcd_client, "/v1/counter/vxlan"
shared.etcd_client, "/v1/counter/vxlan"
),
"type": data["type"],
}
if validator.user.value:
try:
nb = pynetbox.api(
url=config['netbox']['url'],
token=config['netbox']['token'],
url=settings['netbox']['url'],
token=settings['netbox']['token'],
)
nb_prefix = nb.ipam.prefixes.get(
prefix=config['network']['prefix']
prefix=settings['network']['prefix']
)
prefix = nb_prefix.available_prefixes.create(
data={
"prefix_length": int(config['network']['prefix_length']),
"prefix_length": int(settings['network']['prefix_length']),
"description": '{}\'s network "{}"'.format(
data["name"], data["network_name"]
),
@ -449,11 +447,11 @@ class CreateNetwork(Resource):
network_entry["ipv6"] = "fd00::/64"
network_key = join_path(
config['etcd']['network_prefix'],
settings['etcd']['network_prefix'],
data['name'],
data['network_name'],
)
etcd_client.put(network_key, network_entry, value_in_json=True)
shared.etcd_client.put(network_key, network_entry, value_in_json=True)
return {"message": "Network successfully added."}
else:
return validator.get_errors(), 400
@ -467,9 +465,9 @@ class ListUserNetwork(Resource):
if validator.is_valid():
prefix = join_path(
config['etcd']['network_prefix'], data["name"]
settings['etcd']['network_prefix'], data["name"]
)
networks = etcd_client.get_prefix(prefix, value_in_json=True)
networks = shared.etcd_client.get_prefix(prefix, value_in_json=True)
user_networks = []
for net in networks:
net.value["name"] = net.key.split("/")[-1]
@ -503,7 +501,7 @@ api.add_resource(CreateNetwork, "/network/create")
def main():
image_stores = list(etcd_client.get_prefix(config['etcd']['image_store_prefix'], value_in_json=True))
image_stores = list(shared.etcd_client.get_prefix(settings['etcd']['image_store_prefix'], value_in_json=True))
if len(image_stores) == 0:
data = {
"is_public": True,
@ -513,7 +511,7 @@ def main():
"attributes": {"list": [], "key": [], "pool": "images"},
}
etcd_client.put(join_path(config['etcd']['image_store_prefix'], uuid4().hex), json.dumps(data))
shared.etcd_client.put(join_path(settings['etcd']['image_store_prefix'], uuid4().hex), json.dumps(data))
app.run(host="::", debug=True)

23
ucloud/api/schemas.py
View file

@ -21,7 +21,8 @@ import bitmath
from ucloud.common.host import HostStatus
from ucloud.common.vm import VMStatus
from ucloud.config import etcd_client, config, vm_pool, host_pool
from ucloud.shared import shared
from ucloud.settings import settings
from . import helper, logger
from .common_fields import Field, VmUUIDField
from .helper import check_otp, resolve_vm_name
@ -102,14 +103,14 @@ class CreateImageSchema(BaseSchema):
super().__init__(data, fields)
def file_uuid_validation(self):
file_entry = etcd_client.get(os.path.join(config['etcd']['file_prefix'], self.uuid.value))
file_entry = shared.etcd_client.get(os.path.join(settings['etcd']['file_prefix'], self.uuid.value))
if file_entry is None:
self.add_error(
"Image File with uuid '{}' Not Found".format(self.uuid.value)
)
def image_store_name_validation(self):
image_stores = list(etcd_client.get_prefix(config['etcd']['image_store_prefix']))
image_stores = list(shared.etcd_client.get_prefix(settings['etcd']['image_store_prefix']))
image_store = next(
filter(
@ -218,7 +219,7 @@ class CreateVMSchema(OTPSchema):
def image_validation(self):
try:
image_uuid = helper.resolve_image_name(self.image.value, etcd_client)
image_uuid = helper.resolve_image_name(self.image.value, shared.etcd_client)
except Exception as e:
logger.exception("Cannot resolve image name = %s", self.image.value)
self.add_error(str(e))
@ -236,7 +237,7 @@ class CreateVMSchema(OTPSchema):
if _network:
for net in _network:
network = etcd_client.get(os.path.join(config['etcd']['network_prefix'],
network = shared.etcd_client.get(os.path.join(settings['etcd']['network_prefix'],
self.name.value,
net), value_in_json=True)
if not network:
@ -310,7 +311,7 @@ class VMStatusSchema(OTPSchema):
super().__init__(data, fields)
def validation(self):
vm = vm_pool.get(self.uuid.value)
vm = shared.vm_pool.get(self.uuid.value)
if not (
vm.value["owner"] == self.name.value or self.realm.value == "ungleich-admin"
):
@ -343,7 +344,7 @@ class VmActionSchema(OTPSchema):
)
def validation(self):
vm = vm_pool.get(self.uuid.value)
vm = shared.vm_pool.get(self.uuid.value)
if not (
vm.value["owner"] == self.name.value or self.realm.value == "ungleich-admin"
):
@ -383,7 +384,7 @@ class VmMigrationSchema(OTPSchema):
def destination_validation(self):
hostname = self.destination.value
host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
host = next(filter(lambda h: h.hostname == hostname, shared.host_pool.hosts), None)
if not host:
self.add_error("No Such Host ({}) exists".format(self.destination.value))
elif host.status != HostStatus.alive:
@ -392,7 +393,7 @@ class VmMigrationSchema(OTPSchema):
self.destination.value = host.key
def validation(self):
vm = vm_pool.get(self.uuid.value)
vm = shared.vm_pool.get(self.uuid.value)
if not (
vm.value["owner"] == self.name.value or self.realm.value == "ungleich-admin"
):
@ -401,7 +402,7 @@ class VmMigrationSchema(OTPSchema):
if vm.status != VMStatus.running:
self.add_error("Can't migrate non-running VM")
if vm.hostname == os.path.join(config['etcd']['host_prefix'], self.destination.value):
if vm.hostname == os.path.join(settings['etcd']['host_prefix'], self.destination.value):
self.add_error("Destination host couldn't be same as Source Host")
@ -443,7 +444,7 @@ class CreateNetwork(OTPSchema):
super().__init__(data, fields=fields)
def network_name_validation(self):
network = etcd_client.get(os.path.join(config['etcd']['network_prefix'],
network = shared.etcd_client.get(os.path.join(settings['etcd']['network_prefix'],
self.name.value,
self.network_name.value),
value_in_json=True)

40
ucloud/common/etcd_wrapper.py
View file

@ -4,40 +4,63 @@ import queue
import copy
from collections import namedtuple
from functools import wraps
from . import logger
PseudoEtcdMeta = namedtuple('PseudoEtcdMeta', ['key'])
PseudoEtcdMeta = namedtuple("PseudoEtcdMeta", ["key"])
class EtcdEntry:
# key: str
# value: str
def __init__(self, meta, value, value_in_json=False):
self.key = meta.key.decode("utf-8")
self.value = value.decode("utf-8")
self.key = meta.key.decode('utf-8')
self.value = value.decode('utf-8')
if value_in_json:
self.value = json.loads(self.value)
def readable_errors(func):
@wraps(func)
def wrapper(*args, **kwargs):
try:
func(*args, **kwargs)
except etcd3.exceptions.ConnectionFailedError as err:
raise etcd3.exceptions.ConnectionFailedError('etcd connection failed') from err
except etcd3.exceptions.ConnectionTimeoutError as err:
raise etcd3.exceptions.ConnectionTimeoutError('etcd connection timeout') from err
except Exception:
print('Some error occurred, most probably it is etcd that is erroring out.')
logger.exception('Some etcd error occurred')
return wrapper
class Etcd3Wrapper:
def __init__(self, *args, **kwargs):
self.client = etcd3.client(*args, **kwargs)
@readable_errors
def get(self, *args, value_in_json=False, **kwargs):
_value, _key = self.client.get(*args, **kwargs)
if _key is None or _value is None:
return None
return EtcdEntry(_key, _value, value_in_json=value_in_json)
@readable_errors
def put(self, *args, value_in_json=False, **kwargs):
_key, _value = args
if value_in_json:
_value = json.dumps(_value)
if not isinstance(_key, str):
_key = _key.decode("utf-8")
_key = _key.decode('utf-8')
return self.client.put(_key, _value, **kwargs)
@readable_errors
def get_prefix(self, *args, value_in_json=False, **kwargs):
r = self.client.get_prefix(*args, **kwargs)
for entry in r:
@ -45,10 +68,11 @@ class Etcd3Wrapper:
if e.value:
yield e
@readable_errors
def watch_prefix(self, key, timeout=0, value_in_json=False):
timeout_event = EtcdEntry(PseudoEtcdMeta(key=b"TIMEOUT"),
value=str.encode(json.dumps({"status": "TIMEOUT",
"type": "TIMEOUT"})),
timeout_event = EtcdEntry(PseudoEtcdMeta(key=b'TIMEOUT'),
value=str.encode(json.dumps({'status': 'TIMEOUT',
'type': 'TIMEOUT'})),
value_in_json=value_in_json)
event_queue = queue.Queue()
@ -71,4 +95,4 @@ class Etcd3Wrapper:
class PsuedoEtcdEntry(EtcdEntry):
def __init__(self, key, value, value_in_json=False):
super().__init__(PseudoEtcdMeta(key=key.encode("utf-8")), value, value_in_json=value_in_json)
super().__init__(PseudoEtcdMeta(key=key.encode('utf-8')), value, value_in_json=value_in_json)

60
ucloud/common/network.py Normal file
View file

@ -0,0 +1,60 @@
import subprocess as sp
import random
import logging
import socket
from contextlib import closing
logger = logging.getLogger(__name__)
def random_bytes(num=6):
return [random.randrange(256) for _ in range(num)]
def generate_mac(uaa=False, multicast=False, oui=None, separator=':', byte_fmt='%02x'):
mac = random_bytes()
if oui:
if type(oui) == str:
oui = [int(chunk) for chunk in oui.split(separator)]
mac = oui + random_bytes(num=6 - len(oui))
else:
if multicast:
mac[0] |= 1 # set bit 0
else:
mac[0] &= ~1 # clear bit 0
if uaa:
mac[0] &= ~(1 << 1) # clear bit 1
else:
mac[0] |= 1 << 1 # set bit 1
return separator.join(byte_fmt % b for b in mac)
def create_dev(script, _id, dev, ip=None):
command = [script, _id, dev]
if ip:
command.append(ip)
try:
output = sp.check_output(command, stderr=sp.PIPE)
except Exception as e:
print(e)
return None
else:
return output.decode('utf-8').strip()
def delete_network_interface(iface):
try:
sp.check_output(['ip', 'link', 'del', iface])
except Exception:
logger.exception('Interface Deletion failed')
def find_free_port():
with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
try:
s.bind(('', 0))
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
except Exception:
return None
else:
return s.getsockname()[1]

18
ucloud/common/storage_handlers.py
View file

@ -7,6 +7,8 @@ from abc import ABC
from . import logger
from os.path import join as join_path
from ucloud.settings import settings as config
class ImageStorageHandler(ABC):
def __init__(self, image_base, vm_base):
@ -156,3 +158,19 @@ class CEPHBasedImageStorageHandler(ImageStorageHandler):
path = join_path(self.vm_base, path)
command = ["rbd", "info", path]
return self.execute_command(command, report=False)
def get_storage_handler():
__storage_backend = config['storage']['storage_backend']
if __storage_backend == 'filesystem':
return FileSystemBasedImageStorageHandler(
vm_base=config['storage']['vm_dir'],
image_base=config['storage']['image_dir']
)
elif __storage_backend == 'ceph':
return CEPHBasedImageStorageHandler(
vm_base=config['storage']['ceph_vm_pool'],
image_base=config['storage']['ceph_image_pool']
)
else:
raise Exception('Unknown Image Storage Handler')

39
ucloud/config.py
View file

@ -1,39 +0,0 @@
import configparser
import os
import logging
from ucloud.common.host import HostPool
from ucloud.common.request import RequestPool
from ucloud.common.vm import VmPool
from ucloud.common.storage_handlers import (FileSystemBasedImageStorageHandler,
CEPHBasedImageStorageHandler)
from ucloud.common.etcd_wrapper import Etcd3Wrapper
from ucloud.settings import Settings
from os.path import join as join_path
logger = logging.getLogger('ucloud.config')
config = Settings()
etcd_client = config.get_etcd_client()
host_pool = HostPool(etcd_client, config['etcd']['host_prefix'])
vm_pool = VmPool(etcd_client, config['etcd']['vm_prefix'])
request_pool = RequestPool(etcd_client, config['etcd']['request_prefix'])
running_vms = []
__storage_backend = config['storage']['storage_backend']
if __storage_backend == 'filesystem':
image_storage_handler = FileSystemBasedImageStorageHandler(
vm_base=config['storage']['vm_dir'],
image_base=config['storage']['image_dir']
)
elif __storage_backend == 'ceph':
image_storage_handler = CEPHBasedImageStorageHandler(
vm_base=config['storage']['ceph_vm_pool'],
image_base=config['storage']['ceph_image_pool']
)
else:
raise Exception('Unknown Image Storage Handler')

10
ucloud/configure/main.py
View file

@ -2,21 +2,19 @@ import argparse
import sys
import os
from ucloud.settings import Settings
from ucloud.settings import settings
from ucloud.shared import shared
config = Settings()
etcd_client = config.get_etcd_client()
def update_config(section, kwargs):
uncloud_config = etcd_client.get(config.config_key,
value_in_json=True)
uncloud_config = shared.etcd_client.get(settings.config_key, value_in_json=True)
if not uncloud_config:
uncloud_config = {}
else:
uncloud_config = uncloud_config.value
uncloud_config[section] = kwargs
etcd_client.put(config.config_key, uncloud_config, value_in_json=True)
shared.etcd_client.put(settings.config_key, uncloud_config, value_in_json=True)
def configure_parser(parser):

17
ucloud/filescanner/main.py
View file

@ -8,8 +8,8 @@ import sys
from uuid import uuid4
from . import logger
from ucloud.config import config, etcd_client
from ucloud.settings import settings
from ucloud.shared import shared
def getxattr(file, attr):
"""Get specified user extended attribute (arg:attr) of a file (arg:file)"""
@ -69,11 +69,10 @@ except Exception as e:
def main():
BASE_DIR = config['storage']['file_dir']
FILE_PREFIX = config['etcd']['file_prefix']
base_dir = settings['storage']['file_dir']
# Recursively Get All Files and Folder below BASE_DIR
files = glob.glob("{}/**".format(BASE_DIR), recursive=True)
files = glob.glob("{}/**".format(base_dir), recursive=True)
# Retain only Files
files = list(filter(os.path.isfile, files))
@ -89,7 +88,7 @@ def main():
file_id = uuid4()
# Get Username
owner = pathlib.Path(file).parts[len(pathlib.Path(BASE_DIR).parts)]
owner = pathlib.Path(file).parts[len(pathlib.Path(base_dir).parts)]
# Get Creation Date of File
# Here, we are assuming that ctime is creation time
@ -105,7 +104,7 @@ def main():
file_path = pathlib.Path(file).parts[-1]
# Create Entry
entry_key = os.path.join(FILE_PREFIX, str(file_id))
entry_key = os.path.join(settings['etcd']['file_prefix'], str(file_id))
entry_value = {
"filename": file_path,
"owner": owner,
@ -115,8 +114,8 @@ def main():
}
logger.info("Tracking %s", file)
# Insert Entry
etcd_client.put(entry_key, entry_value, value_in_json=True)
shared.etcd_client.put(entry_key, entry_value, value_in_json=True)
setxattr(file, "utracked", True)

13
ucloud/host/helper.py
View file

@ -1,13 +0,0 @@
import socket
from contextlib import closing
def find_free_port():
with closing(socket.socket(socket.AF_INET, socket.SOCK_STREAM)) as s:
try:
s.bind(('', 0))
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
except Exception:
return None
else:
return s.getsockname()[1]

110
ucloud/host/main.py
View file

@ -3,22 +3,21 @@ import multiprocessing as mp
import time
import sys
from os.path import isdir
from ucloud.common.etcd_wrapper import Etcd3Wrapper
from ucloud.common.request import RequestEntry, RequestType
from ucloud.config import (vm_pool, request_pool,
etcd_client, running_vms,
HostPool, config)
from ucloud.common.host import HostPool
from ucloud.shared import shared
from ucloud.settings import settings
from .helper import find_free_port
from . import virtualmachine, logger
vmm = virtualmachine.VMM()
def update_heartbeat(hostname):
"""Update Last HeartBeat Time for :param hostname: in etcd"""
client = config.get_etcd_client()
host_pool = HostPool(client, config['etcd']['host_prefix'])
client = shared.etcd_client
host_pool = HostPool(client)
this_host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
while True:
@ -27,122 +26,55 @@ def update_heartbeat(hostname):
time.sleep(10)
def maintenance(host):
# To capture vm running according to running_vms list
# This is to capture successful migration of a VM.
# Suppose, this host is running "vm1" and user initiated
# request to migrate this "vm1" to some other host. On,
# successful migration the destination host would set
# the vm hostname to itself. Thus, we are checking
# whether this host vm is successfully migrated. If yes
# then we shutdown "vm1" on this host.
to_be_removed = []
for running_vm in running_vms:
with vm_pool.get_put(running_vm.key) as vm_entry:
if vm_entry.hostname != host.key and not vm_entry.in_migration:
running_vm.handle.shutdown()
logger.info("VM migration not completed successfully.")
to_be_removed.append(running_vm)
for r in to_be_removed:
running_vms.remove(r)
# To check vm running according to etcd entries
alleged_running_vms = vm_pool.by_status("RUNNING", vm_pool.by_host(host.key))
for vm_entry in alleged_running_vms:
_vm = virtualmachine.get_vm(running_vms, vm_entry.key)
# Whether, the allegedly running vm is in our
# running_vms list or not if it is said to be
# running on this host but it is not then we
# need to shut it down
# This is to capture poweroff/shutdown of a VM
# initiated by user inside VM. OR crash of VM by some
# user running process
if (_vm and not _vm.handle.is_running()) or not _vm:
logger.debug("_vm = %s, is_running() = %s" % (_vm, _vm.handle.is_running()))
vm_entry.add_log("""{} is not running but is said to be running.
So, shutting it down and declare it killed""".format(vm_entry.key))
vm_entry.declare_killed()
vm_pool.put(vm_entry)
if _vm:
running_vms.remove(_vm)
def check():
if config['storage']['storage_backend'] == 'filesystem' and \
not isdir(config['storage']['vm_dir']):
print("You have set STORAGE_BACKEND to filesystem. So, the vm directory mentioned"
" in /etc/ucloud/ucloud.conf file must exists. But, it don't.")
sys.exit(1)
def main(hostname):
check()
heartbeat_updating_process = mp.Process(target=update_heartbeat, args=(hostname,))
host_pool = HostPool(etcd_client, config['etcd']['host_prefix'])
host_pool = HostPool(shared.etcd_client)
host = next(filter(lambda h: h.hostname == hostname, host_pool.hosts), None)
assert host is not None, "No such host with name = {}".format(hostname)
try:
heartbeat_updating_process = mp.Process(target=update_heartbeat, args=(hostname,))
heartbeat_updating_process.start()
except Exception as e:
logger.info("No Need To Go Further. Our heartbeat updating mechanism is not working")
logger.exception(e)
exit(-1)
logger.info("%s Session Started %s", '*' * 5, '*' * 5)
# It is seen that under heavy load, timeout event doesn't come
# in a predictive manner (which is intentional because we give
# higher priority to customer's requests) which delays heart
# beat update which in turn misunderstood by scheduler that the
# host is dead when it is actually alive. So, to ensure that we
# update the heart beat in a predictive manner we start Heart
# beat updating mechanism in separated thread
sys.exit("No Need To Go Further. ucloud-host heartbeat updating mechanism is not working")
for events_iterator in [
etcd_client.get_prefix(config['etcd']['request_prefix'], value_in_json=True),
etcd_client.watch_prefix(config['etcd']['request_prefix'], timeout=10, value_in_json=True),
shared.etcd_client.get_prefix(settings['etcd']['request_prefix'], value_in_json=True),
shared.etcd_client.watch_prefix(settings['etcd']['request_prefix'], timeout=10, value_in_json=True),
]:
for request_event in events_iterator:
request_event = RequestEntry(request_event)
if request_event.type == "TIMEOUT":
maintenance(host)
vmm.maintenance(host)
continue
# If the event is directed toward me OR I am destination of a InitVMMigration
if request_event.hostname == host.key or request_event.destination == host.key:
logger.debug("VM Request: %s", request_event)
request_pool.client.client.delete(request_event.key)
vm_entry = vm_pool.get(request_event.uuid)
shared.request_pool.client.client.delete(request_event.key)
vm_entry = shared.vm_pool.get(request_event.uuid)
if vm_entry:
if request_event.type == RequestType.StartVM:
virtualmachine.start(vm_entry)
vmm.start(vm_entry)
elif request_event.type == RequestType.StopVM:
virtualmachine.stop(vm_entry)
vmm.stop(vm_entry)
elif request_event.type == RequestType.DeleteVM:
virtualmachine.delete(vm_entry)
vmm.delete(vm_entry)
elif request_event.type == RequestType.InitVMMigration:
virtualmachine.start(vm_entry, host.key, find_free_port())
vmm.start(vm_entry, host.key)
elif request_event.type == RequestType.TransferVM:
virtualmachine.transfer(request_event)
vmm.transfer(request_event)
else:
logger.info("VM Entry missing")
logger.info("Running VMs %s", running_vms)
logger.info("Running VMs %s", vmm.running_vms)
if __name__ == "__main__":

648
ucloud/host/virtualmachine.py
View file

@ -5,7 +5,6 @@
# https://qemu.weilnetz.de/doc/qemu-doc.html#pcsys_005fmonitor
import os
import random
import subprocess as sp
import tempfile
import time
@ -21,11 +20,12 @@ import sshtunnel
from ucloud.common.helpers import get_ipv6_address
from ucloud.common.request import RequestEntry, RequestType
from ucloud.common.vm import VMEntry, VMStatus
from ucloud.config import (etcd_client, request_pool,
running_vms, vm_pool, config,
image_storage_handler)
from . import qmp
from ucloud.common.network import create_dev, delete_network_interface, find_free_port
from ucloud.host import logger
from ucloud.shared import shared
from ucloud.settings import settings
from . import qmp
class VM:
@ -38,193 +38,22 @@ class VM:
return "VM({})".format(self.key)
def delete_network_interface(iface):
try:
sp.check_output(['ip', 'link', 'del', iface])
except Exception:
pass
def capture_all_exception(func):
@wraps(func)
def wrapper(*args, **kwargs):
try:
func(*args, **kwargs)
except Exception:
logger.info("Exception absorbed by captual_all_exception()")
logger.exception(func.__name__)
def resolve_network(network_name, network_owner):
network = etcd_client.get(join_path(config['etcd']['network_prefix'],
network_owner,
network_name),
value_in_json=True)
return network
def delete_vm_network(vm_entry):
try:
for network in vm_entry.network:
network_name = network[0]
tap_mac = network[1]
tap_id = network[2]
delete_network_interface('tap{}'.format(tap_id))
owners_vms = vm_pool.by_owner(vm_entry.owner)
owners_running_vms = vm_pool.by_status(VMStatus.running,
_vms=owners_vms)
networks = map(lambda n: n[0],
map(lambda vm: vm.network, owners_running_vms)
)
networks_in_use_by_user_vms = [vm[0] for vm in networks]
if network_name not in networks_in_use_by_user_vms:
network_entry = resolve_network(network[0], vm_entry.owner)
if network_entry:
network_type = network_entry.value["type"]
network_id = network_entry.value["id"]
if network_type == "vxlan":
delete_network_interface('br{}'.format(network_id))
delete_network_interface('vxlan{}'.format(network_id))
except Exception:
logger.exception("Exception in network interface deletion")
def create_dev(script, _id, dev, ip=None):
command = [script, _id, dev]
if ip:
command.append(ip)
try:
output = sp.check_output(command, stderr=sp.PIPE)
except Exception as e:
print(e.stderr)
return None
else:
return output.decode("utf-8").strip()
def create_vxlan_br_tap(_id, _dev, tap_id, ip=None):
network_script_base = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'network')
vxlan = create_dev(script=os.path.join(network_script_base, 'create-vxlan.sh'),
_id=_id, dev=_dev)
if vxlan:
bridge = create_dev(script=os.path.join(network_script_base, 'create-bridge.sh'),
_id=_id, dev=vxlan, ip=ip)
if bridge:
tap = create_dev(script=os.path.join(network_script_base, 'create-tap.sh'),
_id=str(tap_id), dev=bridge)
if tap:
return tap
def random_bytes(num=6):
return [random.randrange(256) for _ in range(num)]
def generate_mac(uaa=False, multicast=False, oui=None, separator=':', byte_fmt='%02x'):
mac = random_bytes()
if oui:
if type(oui) == str:
oui = [int(chunk) for chunk in oui.split(separator)]
mac = oui + random_bytes(num=6 - len(oui))
else:
if multicast:
mac[0] |= 1 # set bit 0
else:
mac[0] &= ~1 # clear bit 0
if uaa:
mac[0] &= ~(1 << 1) # clear bit 1
else:
mac[0] |= 1 << 1 # set bit 1
return separator.join(byte_fmt % b for b in mac)
def update_radvd_conf(etcd_client):
network_script_base = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'network')
networks = {
net.value['ipv6']: net.value['id']
for net in etcd_client.get_prefix('/v1/network/', value_in_json=True)
if net.value.get('ipv6')
}
radvd_template = open(os.path.join(network_script_base,
'radvd-template.conf'), 'r').read()
radvd_template = Template(radvd_template)
content = [radvd_template.safe_substitute(bridge='br{}'.format(networks[net]),
prefix=net)
for net in networks if networks.get(net)]
with open('/etc/radvd.conf', 'w') as radvd_conf:
radvd_conf.writelines(content)
try:
sp.check_output(['systemctl', 'restart', 'radvd'])
except Exception:
sp.check_output(['service', 'radvd', 'restart'])
def get_start_command_args(vm_entry, vnc_sock_filename: str, migration=False, migration_port=None):
threads_per_core = 1
vm_memory = int(bitmath.parse_string_unsafe(vm_entry.specs["ram"]).to_MB())
vm_cpus = int(vm_entry.specs["cpu"])
vm_uuid = vm_entry.uuid
vm_networks = vm_entry.network
command = "-name {}_{}".format(vm_entry.owner, vm_entry.name)
command += " -drive file={},format=raw,if=virtio,cache=none".format(
image_storage_handler.qemu_path_string(vm_uuid)
)
command += " -device virtio-rng-pci -vnc unix:{}".format(vnc_sock_filename)
command += " -m {} -smp cores={},threads={}".format(
vm_memory, vm_cpus, threads_per_core
)
if migration:
command += " -incoming tcp:[::]:{}".format(migration_port)
tap = None
for network_mac_and_tap in vm_networks:
network_name, mac, tap = network_mac_and_tap
_key = os.path.join(config['etcd']['network_prefix'], vm_entry.owner, network_name)
network = etcd_client.get(_key, value_in_json=True)
network_type = network.value["type"]
network_id = str(network.value["id"])
network_ipv6 = network.value["ipv6"]
if network_type == "vxlan":
tap = create_vxlan_br_tap(_id=network_id,
_dev=config['network']['vxlan_phy_dev'],
tap_id=tap,
ip=network_ipv6)
update_radvd_conf(etcd_client)
command += " -netdev tap,id=vmnet{net_id},ifname={tap},script=no,downscript=no" \
" -device virtio-net-pci,netdev=vmnet{net_id},mac={mac}" \
.format(tap=tap, net_id=network_id, mac=mac)
return command.split(" ")
def create_vm_object(vm_entry, migration=False, migration_port=None):
# NOTE: If migration suddenly stop working, having different
# VNC unix filename on source and destination host can
# be a possible cause of it.
# REQUIREMENT: Use Unix Socket instead of TCP Port for VNC
vnc_sock_file = tempfile.NamedTemporaryFile()
qemu_args = get_start_command_args(
vm_entry=vm_entry,
vnc_sock_filename=vnc_sock_file.name,
migration=migration,
migration_port=migration_port,
)
qemu_machine = qmp.QEMUMachine("/usr/bin/qemu-system-x86_64", args=qemu_args)
return VM(vm_entry.key, qemu_machine, vnc_sock_file)
def get_vm(vm_list: list, vm_key) -> Union[VM, None]:
return next((vm for vm in vm_list if vm.key == vm_key), None)
return wrapper
def need_running_vm(func):
@wraps(func)
def wrapper(e):
vm = get_vm(running_vms, e.key)
def wrapper(self, e):
vm = self.get_vm(self.running_vms, e.key)
if vm:
try:
status = vm.handle.command("query-status")
@ -242,143 +71,336 @@ def need_running_vm(func):
return wrapper
def create(vm_entry: VMEntry):
if image_storage_handler.is_vm_image_exists(vm_entry.uuid):
# File Already exists. No Problem Continue
logger.debug("Image for vm %s exists", vm_entry.uuid)
else:
vm_hdd = int(bitmath.parse_string_unsafe(vm_entry.specs["os-ssd"]).to_MB())
if image_storage_handler.make_vm_image(src=vm_entry.image_uuid, dest=vm_entry.uuid):
if not image_storage_handler.resize_vm_image(path=vm_entry.uuid, size=vm_hdd):
vm_entry.status = VMStatus.error
else:
logger.info("New VM Created")
class VMM:
def __init__(self):
self.etcd_client = shared.etcd_client
self.storage_handler = shared.storage_handler
self.running_vms = []
def get_start_command_args(self, vm_entry, vnc_sock_filename: str, migration=False, migration_port=None):
threads_per_core = 1
vm_memory = int(bitmath.parse_string_unsafe(vm_entry.specs['ram']).to_MB())
vm_cpus = int(vm_entry.specs['cpu'])
vm_uuid = vm_entry.uuid
vm_networks = vm_entry.network
def start(vm_entry: VMEntry, destination_host_key=None, migration_port=None):
_vm = get_vm(running_vms, vm_entry.key)
command = '-name {}_{}'.format(vm_entry.owner, vm_entry.name)
# VM already running. No need to proceed further.
if _vm:
logger.info("VM %s already running" % vm_entry.uuid)
return
else:
logger.info("Trying to start %s" % vm_entry.uuid)
if destination_host_key:
launch_vm(vm_entry, migration=True, migration_port=migration_port,
destination_host_key=destination_host_key)
else:
create(vm_entry)
launch_vm(vm_entry)
@need_running_vm
def stop(vm_entry):
vm = get_vm(running_vms, vm_entry.key)
vm.handle.shutdown()
if not vm.handle.is_running():
vm_entry.add_log("Shutdown successfully")
vm_entry.declare_stopped()
vm_pool.put(vm_entry)
running_vms.remove(vm)
delete_vm_network(vm_entry)
def delete(vm_entry):
logger.info("Deleting VM | %s", vm_entry)
stop(vm_entry)
if image_storage_handler.is_vm_image_exists(vm_entry.uuid):
r_status = image_storage_handler.delete_vm_image(vm_entry.uuid)
if r_status:
etcd_client.client.delete(vm_entry.key)
else:
etcd_client.client.delete(vm_entry.key)
def transfer(request_event):
# This function would run on source host i.e host on which the vm
# is running initially. This host would be responsible for transferring
# vm state to destination host.
_host, _port = request_event.parameters["host"], request_event.parameters["port"]
_uuid = request_event.uuid
_destination = request_event.destination_host_key
vm = get_vm(running_vms, join_path(config['etcd']['vm_prefix'], _uuid))
if vm:
tunnel = sshtunnel.SSHTunnelForwarder(
_host,
ssh_username=config['ssh']['username'],
ssh_pkey=config['ssh']['private_key_path'],
remote_bind_address=("127.0.0.1", _port),
ssh_proxy_enabled=True,
ssh_proxy=(_host, 22)
command += ' -drive file={},format=raw,if=virtio,cache=none'.format(
self.storage_handler.qemu_path_string(vm_uuid)
)
try:
tunnel.start()
except sshtunnel.BaseSSHTunnelForwarderError:
logger.exception("Couldn't establish connection to (%s, 22)", _host)
command += ' -device virtio-rng-pci -vnc unix:{}'.format(vnc_sock_filename)
command += ' -m {} -smp cores={},threads={}'.format(
vm_memory, vm_cpus, threads_per_core
)
if migration:
command += ' -incoming tcp:[::]:{}'.format(migration_port)
for network_mac_and_tap in vm_networks:
network_name, mac, tap = network_mac_and_tap
_key = os.path.join(settings['etcd']['network_prefix'], vm_entry.owner, network_name)
network = self.etcd_client.get(_key, value_in_json=True)
network_type = network.value["type"]
network_id = str(network.value["id"])
network_ipv6 = network.value["ipv6"]
if network_type == "vxlan":
tap = create_vxlan_br_tap(_id=network_id,
_dev=settings['network']['vxlan_phy_dev'],
tap_id=tap,
ip=network_ipv6)
all_networks = self.etcd_client.get_prefix('/v1/network/', value_in_json=True)
update_radvd_conf(all_networks)
command += " -netdev tap,id=vmnet{net_id},ifname={tap},script=no,downscript=no" \
" -device virtio-net-pci,netdev=vmnet{net_id},mac={mac}" \
.format(tap=tap, net_id=network_id, mac=mac)
return command.split(" ")
def create_vm_object(self, vm_entry, migration=False, migration_port=None):
vnc_sock_file = tempfile.NamedTemporaryFile()
qemu_args = self.get_start_command_args(
vm_entry=vm_entry,
vnc_sock_filename=vnc_sock_file.name,
migration=migration,
migration_port=migration_port,
)
qemu_machine = qmp.QEMUMachine("/usr/bin/qemu-system-x86_64", args=qemu_args)
return VM(vm_entry.key, qemu_machine, vnc_sock_file)
@staticmethod
def get_vm(vm_list: list, vm_key) -> Union[VM, None]:
return next((vm for vm in vm_list if vm.key == vm_key), None)
@capture_all_exception
def create(self, vm_entry: VMEntry):
if self.storage_handler.is_vm_image_exists(vm_entry.uuid):
# File Already exists. No Problem Continue
logger.debug("Image for vm %s exists", vm_entry.uuid)
return None
else:
vm.handle.command(
"migrate", uri="tcp:0.0.0.0:{}".format(tunnel.local_bind_port)
)
vm_hdd = int(bitmath.parse_string_unsafe(vm_entry.specs["os-ssd"]).to_MB())
if self.storage_handler.make_vm_image(src=vm_entry.image_uuid, dest=vm_entry.uuid):
if not self.storage_handler.resize_vm_image(path=vm_entry.uuid, size=vm_hdd):
vm_entry.status = VMStatus.error
else:
logger.info("New VM Created")
status = vm.handle.command("query-migrate")["status"]
while status not in ["failed", "completed"]:
time.sleep(2)
status = vm.handle.command("query-migrate")["status"]
@capture_all_exception
def start(self, vm_entry: VMEntry, destination_host_key=None):
_vm = self.get_vm(self.running_vms, vm_entry.key)
with vm_pool.get_put(request_event.uuid) as source_vm:
if status == "failed":
source_vm.add_log("Migration Failed")
elif status == "completed":
# If VM is successfully migrated then shutdown the VM
# on this host and update hostname to destination host key
source_vm.add_log("Successfully migrated")
source_vm.hostname = _destination
running_vms.remove(vm)
vm.handle.shutdown()
source_vm.in_migration = False # VM transfer finished
finally:
tunnel.close()
# VM already running. No need to proceed further.
if _vm:
logger.info("VM %s already running" % vm_entry.uuid)
return
else:
logger.info("Trying to start %s" % vm_entry.uuid)
if destination_host_key:
migration_port = find_free_port()
self.launch_vm(vm_entry, migration=True, migration_port=migration_port,
destination_host_key=destination_host_key)
else:
self.create(vm_entry)
self.launch_vm(vm_entry)
def launch_vm(vm_entry, migration=False, migration_port=None, destination_host_key=None):
logger.info("Starting %s" % vm_entry.key)
vm = create_vm_object(vm_entry, migration=migration, migration_port=migration_port)
try:
vm.handle.launch()
except Exception:
logger.exception("Error Occured while starting VM")
@need_running_vm
@capture_all_exception
def stop(self, vm_entry):
vm = self.get_vm(self.running_vms, vm_entry.key)
vm.handle.shutdown()
if not vm.handle.is_running():
vm_entry.add_log("Shutdown successfully")
vm_entry.declare_stopped()
shared.vm_pool.put(vm_entry)
self.running_vms.remove(vm)
delete_vm_network(vm_entry)
if migration:
# We don't care whether MachineError or any other error occurred
pass
@capture_all_exception
def delete(self, vm_entry):
logger.info("Deleting VM | %s", vm_entry)
self.stop(vm_entry)
if self.storage_handler.is_vm_image_exists(vm_entry.uuid):
r_status = self.storage_handler.delete_vm_image(vm_entry.uuid)
if r_status:
shared.etcd_client.client.delete(vm_entry.key)
else:
# Error during typical launch of a vm
vm.handle.shutdown()
vm_entry.declare_killed()
vm_pool.put(vm_entry)
else:
vm_entry.vnc_socket = vm.vnc_socket_file.name
running_vms.append(vm)
shared.etcd_client.client.delete(vm_entry.key)
if migration:
vm_entry.in_migration = True
r = RequestEntry.from_scratch(
type=RequestType.TransferVM,
hostname=vm_entry.hostname,
parameters={"host": get_ipv6_address(), "port": migration_port},
uuid=vm_entry.uuid,
destination_host_key=destination_host_key,
request_prefix=config['etcd']['request_prefix']
@capture_all_exception
def transfer(self, request_event):
# This function would run on source host i.e host on which the vm
# is running initially. This host would be responsible for transferring
# vm state to destination host.
_host, _port = request_event.parameters["host"], request_event.parameters["port"]
_uuid = request_event.uuid
_destination = request_event.destination_host_key
vm = self.get_vm(self.running_vms, join_path(settings['etcd']['vm_prefix'], _uuid))
if vm:
tunnel = sshtunnel.SSHTunnelForwarder(
_host,
ssh_username=settings['ssh']['username'],
ssh_pkey=settings['ssh']['private_key_path'],
remote_bind_address=("127.0.0.1", _port),
ssh_proxy_enabled=True,
ssh_proxy=(_host, 22)
)
request_pool.put(r)
else:
# Typical launching of a vm
vm_entry.status = VMStatus.running
vm_entry.add_log("Started successfully")
try:
tunnel.start()
except sshtunnel.BaseSSHTunnelForwarderError:
logger.exception("Couldn't establish connection to (%s, 22)", _host)
else:
vm.handle.command(
"migrate", uri="tcp:0.0.0.0:{}".format(tunnel.local_bind_port)
)
vm_pool.put(vm_entry)
status = vm.handle.command("query-migrate")["status"]
while status not in ["failed", "completed"]:
time.sleep(2)
status = vm.handle.command("query-migrate")["status"]
with shared.vm_pool.get_put(request_event.uuid) as source_vm:
if status == "failed":
source_vm.add_log("Migration Failed")
elif status == "completed":
# If VM is successfully migrated then shutdown the VM
# on this host and update hostname to destination host key
source_vm.add_log("Successfully migrated")
source_vm.hostname = _destination
self.running_vms.remove(vm)
vm.handle.shutdown()
source_vm.in_migration = False # VM transfer finished
finally:
tunnel.close()
@capture_all_exception
def launch_vm(self, vm_entry, migration=False, migration_port=None, destination_host_key=None):
logger.info("Starting %s" % vm_entry.key)
vm = self.create_vm_object(vm_entry, migration=migration, migration_port=migration_port)
try:
vm.handle.launch()
except Exception:
logger.exception("Error Occured while starting VM")
vm.handle.shutdown()
if migration:
# We don't care whether MachineError or any other error occurred
pass
else:
# Error during typical launch of a vm
vm.handle.shutdown()
vm_entry.declare_killed()
shared.vm_pool.put(vm_entry)
else:
vm_entry.vnc_socket = vm.vnc_socket_file.name
self.running_vms.append(vm)
if migration:
vm_entry.in_migration = True
r = RequestEntry.from_scratch(
type=RequestType.TransferVM,
hostname=vm_entry.hostname,
parameters={"host": get_ipv6_address(), "port": migration_port},
uuid=vm_entry.uuid,
destination_host_key=destination_host_key,
request_prefix=settings['etcd']['request_prefix']
)
shared.request_pool.put(r)
else:
# Typical launching of a vm
vm_entry.status = VMStatus.running
vm_entry.add_log("Started successfully")
shared.vm_pool.put(vm_entry)
@capture_all_exception
def maintenance(self, host):
# To capture vm running according to running_vms list
# This is to capture successful migration of a VM.
# Suppose, this host is running "vm1" and user initiated
# request to migrate this "vm1" to some other host. On,
# successful migration the destination host would set
# the vm hostname to itself. Thus, we are checking
# whether this host vm is successfully migrated. If yes
# then we shutdown "vm1" on this host.
logger.debug("Starting Maintenance!!")
to_be_removed = []
for running_vm in self.running_vms:
with shared.vm_pool.get_put(running_vm.key) as vm_entry:
if vm_entry.hostname != host.key and not vm_entry.in_migration:
running_vm.handle.shutdown()
logger.info("VM migration not completed successfully.")
to_be_removed.append(running_vm)
for r in to_be_removed:
self.running_vms.remove(r)
# To check vm running according to etcd entries
alleged_running_vms = shared.vm_pool.by_status("RUNNING", shared.vm_pool.by_host(host.key))
for vm_entry in alleged_running_vms:
_vm = self.get_vm(self.running_vms, vm_entry.key)
# Whether, the allegedly running vm is in our
# running_vms list or not if it is said to be
# running on this host but it is not then we
# need to shut it down
# This is to capture poweroff/shutdown of a VM
# initiated by user inside VM. OR crash of VM by some
# user running process
if (_vm and not _vm.handle.is_running()) or not _vm:
logger.debug("_vm = %s, is_running() = %s" % (_vm, _vm.handle.is_running()))
vm_entry.add_log("""{} is not running but is said to be running.
So, shutting it down and declare it killed""".format(vm_entry.key))
vm_entry.declare_killed()
shared.vm_pool.put(vm_entry)
if _vm:
self.running_vms.remove(_vm)
def resolve_network(network_name, network_owner):
network = shared.etcd_client.get(join_path(settings['etcd']['network_prefix'],
network_owner,
network_name),
value_in_json=True)
return network
def delete_vm_network(vm_entry):
try:
for network in vm_entry.network:
network_name = network[0]
tap_mac = network[1]
tap_id = network[2]
delete_network_interface('tap{}'.format(tap_id))
owners_vms = shared.vm_pool.by_owner(vm_entry.owner)
owners_running_vms = shared.vm_pool.by_status(VMStatus.running,
_vms=owners_vms)
networks = map(
lambda n: n[0], map(lambda vm: vm.network, owners_running_vms)
)
networks_in_use_by_user_vms = [vm[0] for vm in networks]
if network_name not in networks_in_use_by_user_vms:
network_entry = resolve_network(network[0], vm_entry.owner)
if network_entry:
network_type = network_entry.value["type"]
network_id = network_entry.value["id"]
if network_type == "vxlan":
delete_network_interface('br{}'.format(network_id))
delete_network_interface('vxlan{}'.format(network_id))
except Exception:
logger.exception("Exception in network interface deletion")
def create_vxlan_br_tap(_id, _dev, tap_id, ip=None):
network_script_base = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'network')
vxlan = create_dev(script=os.path.join(network_script_base, 'create-vxlan.sh'),
_id=_id, dev=_dev)
if vxlan:
bridge = create_dev(script=os.path.join(network_script_base, 'create-bridge.sh'),
_id=_id, dev=vxlan, ip=ip)
if bridge:
tap = create_dev(script=os.path.join(network_script_base, 'create-tap.sh'),
_id=str(tap_id), dev=bridge)
if tap:
return tap
def update_radvd_conf(all_networks):
network_script_base = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'network')
networks = {
net.value['ipv6']: net.value['id']
for net in all_networks
if net.value.get('ipv6')
}
radvd_template = open(os.path.join(network_script_base,
'radvd-template.conf'), 'r').read()
radvd_template = Template(radvd_template)
content = [
radvd_template.safe_substitute(
bridge='br{}'.format(networks[net]),
prefix=net
)
for net in networks if networks.get(net)
]
with open('/etc/radvd.conf', 'w') as radvd_conf:
radvd_conf.writelines(content)
try:
sp.check_output(['systemctl', 'restart', 'radvd'])
except Exception:
sp.check_output(['service', 'radvd', 'restart'])

19
ucloud/imagescanner/main.py
View file

@ -5,7 +5,8 @@ import sys
from os.path import isdir
from os.path import join as join_path
from ucloud.config import etcd_client, config, image_storage_handler
from ucloud.settings import settings
from ucloud.shared import shared
from ucloud.imagescanner import logger
@ -22,9 +23,9 @@ def qemu_img_type(path):
def check():
""" check whether settings are sane, refuse to start if they aren't """
if config['storage']['storage_backend'] == 'filesystem' and not isdir(config['storage']['image_dir']):
if settings['storage']['storage_backend'] == 'filesystem' and not isdir(settings['storage']['image_dir']):
sys.exit("You have set STORAGE_BACKEND to filesystem, but "
"{} does not exist. Refusing to start".format(config['storage']['image_dir'])
"{} does not exist. Refusing to start".format(settings['storage']['image_dir'])
)
try:
@ -36,7 +37,7 @@ def check():
def main():
# We want to get images entries that requests images to be created
images = etcd_client.get_prefix(config['etcd']['image_prefix'], value_in_json=True)
images = shared.etcd_client.get_prefix(settings['etcd']['image_prefix'], value_in_json=True)
images_to_be_created = list(filter(lambda im: im.value['status'] == 'TO_BE_CREATED', images))
for image in images_to_be_created:
@ -45,9 +46,9 @@ def main():
image_owner = image.value['owner']
image_filename = image.value['filename']
image_store_name = image.value['store_name']
image_full_path = join_path(config['storage']['file_dir'], image_owner, image_filename)
image_full_path = join_path(settings['storage']['file_dir'], image_owner, image_filename)
image_stores = etcd_client.get_prefix(config['etcd']['image_store_prefix'],
image_stores = shared.etcd_client.get_prefix(settings['etcd']['image_store_prefix'],
value_in_json=True)
user_image_store = next(filter(
lambda s, store_name=image_store_name: s.value["name"] == store_name,
@ -71,18 +72,18 @@ def main():
logger.exception(e)
else:
# Import and Protect
r_status = image_storage_handler.import_image(src="image.raw",
r_status = shared.storage_handler.import_image(src="image.raw",
dest=image_uuid,
protect=True)
if r_status:
# Everything is successfully done
image.value["status"] = "CREATED"
etcd_client.put(image.key, json.dumps(image.value))
shared.etcd_client.put(image.key, json.dumps(image.value))
else:
# The user provided image is either not found or of invalid format
image.value["status"] = "INVALID_IMAGE"
etcd_client.put(image.key, json.dumps(image.value))
shared.etcd_client.put(image.key, json.dumps(image.value))
try:
os.remove("image.raw")

10
ucloud/metadata/main.py
View file

@ -2,15 +2,15 @@ import os
from flask import Flask, request
from flask_restful import Resource, Api
from ucloud.config import etcd_client, config, vm_pool
from ucloud.settings import settings
from ucloud.shared import shared
app = Flask(__name__)
api = Api(app)
def get_vm_entry(mac_addr):
return next(filter(lambda vm: mac_addr in list(zip(*vm.network))[1], vm_pool.vms), None)
return next(filter(lambda vm: mac_addr in list(zip(*vm.network))[1], shared.vm_pool.vms), None)
# https://stackoverflow.com/questions/37140846/how-to-convert-ipv6-link-local-address-to-mac-address-in-python
@ -43,10 +43,10 @@ class Root(Resource):
if not data:
return {'message': 'Metadata for such VM does not exists.'}, 404
else:
etcd_key = os.path.join(config['etcd']['user_prefix'],
etcd_key = os.path.join(settings['etcd']['user_prefix'],
data.value['owner_realm'],
data.value['owner'], 'key')
etcd_entry = etcd_client.get_prefix(etcd_key, value_in_json=True)
etcd_entry = shared.etcd_client.get_prefix(etcd_key, value_in_json=True)
user_personal_ssh_keys = [key.value for key in etcd_entry]
data.value['metadata']['ssh-keys'] += user_personal_ssh_keys
return data.value['metadata'], 200

25
ucloud/scheduler/helper.py
View file

@ -6,7 +6,8 @@ import bitmath
from ucloud.common.host import HostStatus
from ucloud.common.request import RequestEntry, RequestType
from ucloud.common.vm import VMStatus
from ucloud.config import vm_pool, host_pool, request_pool, config
from ucloud.shared import shared
from ucloud.settings import settings
def accumulated_specs(vms_specs):
@ -46,14 +47,14 @@ class NoSuitableHostFound(Exception):
def get_suitable_host(vm_specs, hosts=None):
if hosts is None:
hosts = host_pool.by_status(HostStatus.alive)
hosts = shared.host_pool.by_status(HostStatus.alive)
for host in hosts:
# Filter them by host_name
vms = vm_pool.by_host(host.key)
vms = shared.vm_pool.by_host(host.key)
# Filter them by status
vms = vm_pool.by_status(VMStatus.running, vms)
vms = shared.vm_pool.by_status(VMStatus.running, vms)
running_vms_specs = [vm.specs for vm in vms]
@ -75,7 +76,7 @@ def get_suitable_host(vm_specs, hosts=None):
def dead_host_detection():
# Bring out your dead! - Monty Python and the Holy Grail
hosts = host_pool.by_status(HostStatus.alive)
hosts = shared.host_pool.by_status(HostStatus.alive)
dead_hosts_keys = []
for host in hosts:
@ -89,25 +90,25 @@ def dead_host_detection():
def dead_host_mitigation(dead_hosts_keys):
for host_key in dead_hosts_keys:
host = host_pool.get(host_key)
host = shared.host_pool.get(host_key)
host.declare_dead()
vms_hosted_on_dead_host = vm_pool.by_host(host_key)
vms_hosted_on_dead_host = shared.vm_pool.by_host(host_key)
for vm in vms_hosted_on_dead_host:
vm.declare_killed()
vm_pool.put(vm)
host_pool.put(host)
shared.vm_pool.put(vm)
shared.host_pool.put(host)
def assign_host(vm):
vm.hostname = get_suitable_host(vm.specs)
vm_pool.put(vm)
shared.vm_pool.put(vm)
r = RequestEntry.from_scratch(type=RequestType.StartVM,
uuid=vm.uuid,
hostname=vm.hostname,
request_prefix=config['etcd']['request_prefix'])
request_pool.put(r)
request_prefix=settings['etcd']['request_prefix'])
shared.request_pool.put(r)
vm.log.append("VM scheduled for starting")
return vm.hostname

24
ucloud/scheduler/main.py
View file

@ -5,8 +5,8 @@
# maybe expose a prometheus compatible output
from ucloud.common.request import RequestEntry, RequestType
from ucloud.config import etcd_client
from ucloud.config import host_pool, request_pool, vm_pool, config
from ucloud.shared import shared
from ucloud.settings import settings
from .helper import (get_suitable_host, dead_host_mitigation, dead_host_detection,
assign_host, NoSuitableHostFound)
from . import logger
@ -16,8 +16,8 @@ def main():
pending_vms = []
for request_iterator in [
etcd_client.get_prefix(config['etcd']['request_prefix'], value_in_json=True),
etcd_client.watch_prefix(config['etcd']['request_prefix'], timeout=5, value_in_json=True),
shared.etcd_client.get_prefix(settings['etcd']['request_prefix'], value_in_json=True),
shared.etcd_client.watch_prefix(settings['etcd']['request_prefix'], timeout=5, value_in_json=True),
]:
for request_event in request_iterator:
request_entry = RequestEntry(request_event)
@ -44,17 +44,17 @@ def main():
r = RequestEntry.from_scratch(type="ScheduleVM",
uuid=pending_vm_entry.uuid,
hostname=pending_vm_entry.hostname,
request_prefix=config['etcd']['request_prefix'])
request_pool.put(r)
request_prefix=settings['etcd']['request_prefix'])
shared.request_pool.put(r)
elif request_entry.type == RequestType.ScheduleVM:
logger.debug("%s, %s", request_entry.key, request_entry.value)
vm_entry = vm_pool.get(request_entry.uuid)
vm_entry = shared.vm_pool.get(request_entry.uuid)
if vm_entry is None:
logger.info("Trying to act on {} but it is deleted".format(request_entry.uuid))
continue
etcd_client.client.delete(request_entry.key) # consume Request
shared.etcd_client.client.delete(request_entry.key) # consume Request
# If the Request is about a VM which is labelled as "migration"
# and has a destination
@ -62,7 +62,7 @@ def main():
and hasattr(request_entry, "destination") and request_entry.destination:
try:
get_suitable_host(vm_specs=vm_entry.specs,
hosts=[host_pool.get(request_entry.destination)])
hosts=[shared.host_pool.get(request_entry.destination)])
except NoSuitableHostFound:
logger.info("Requested destination host doesn't have enough capacity"
"to hold %s" % vm_entry.uuid)
@ -70,8 +70,8 @@ def main():
r = RequestEntry.from_scratch(type=RequestType.InitVMMigration,
uuid=request_entry.uuid,
destination=request_entry.destination,
request_prefix=config['etcd']['request_prefix'])
request_pool.put(r)
request_prefix=settings['etcd']['request_prefix'])
shared.request_pool.put(r)
# If the Request is about a VM that just want to get started/created
else:
@ -81,7 +81,7 @@ def main():
assign_host(vm_entry)
except NoSuitableHostFound:
vm_entry.add_log("Can't schedule VM. No Resource Left.")
vm_pool.put(vm_entry)
shared.vm_pool.put(vm_entry)
pending_vms.append(vm_entry)
logger.info("No Resource Left. Emailing admin....")

93
ucloud/scheduler/main.py.old
View file

@ -1,93 +0,0 @@
# TODO
# 1. send an email to an email address defined by env['admin-email']
# if resources are finished
# 2. Introduce a status endpoint of the scheduler -
# maybe expose a prometheus compatible output
from ucloud.common.request import RequestEntry, RequestType
from ucloud.config import etcd_client
from ucloud.config import host_pool, request_pool, vm_pool, env_vars
from .helper import (get_suitable_host, dead_host_mitigation, dead_host_detection,
assign_host, NoSuitableHostFound)
from . import logger
def main():
logger.info("%s SESSION STARTED %s", '*' * 5, '*' * 5)
pending_vms = []
for request_iterator in [
etcd_client.get_prefix(env_vars.get('REQUEST_PREFIX'), value_in_json=True),
etcd_client.watch_prefix(env_vars.get('REQUEST_PREFIX'), timeout=5, value_in_json=True),
]:
for request_event in request_iterator:
request_entry = RequestEntry(request_event)
# Never Run time critical mechanism inside timeout
# mechanism because timeout mechanism only comes
# when no other event is happening. It means under
# heavy load there would not be a timeout event.
if request_entry.type == "TIMEOUT":
# Detect hosts that are dead and set their status
# to "DEAD", and their VMs' status to "KILLED"
dead_hosts = dead_host_detection()
if dead_hosts:
logger.debug("Dead hosts: %s", dead_hosts)
dead_host_mitigation(dead_hosts)
# If there are VMs that weren't assigned a host
# because there wasn't a host available which
# meets requirement of that VM then we would
# create a new ScheduleVM request for that VM
# on our behalf.
while pending_vms:
pending_vm_entry = pending_vms.pop()
r = RequestEntry.from_scratch(type="ScheduleVM",
uuid=pending_vm_entry.uuid,
hostname=pending_vm_entry.hostname,
request_prefix=env_vars.get("REQUEST_PREFIX"))
request_pool.put(r)
elif request_entry.type == RequestType.ScheduleVM:
logger.debug("%s, %s", request_entry.key, request_entry.value)
vm_entry = vm_pool.get(request_entry.uuid)
if vm_entry is None:
logger.info("Trying to act on {} but it is deleted".format(request_entry.uuid))
continue
etcd_client.client.delete(request_entry.key) # consume Request
# If the Request is about a VM which is labelled as "migration"
# and has a destination
if hasattr(request_entry, "migration") and request_entry.migration \
and hasattr(request_entry, "destination") and request_entry.destination:
try:
get_suitable_host(vm_specs=vm_entry.specs,
hosts=[host_pool.get(request_entry.destination)])
except NoSuitableHostFound:
logger.info("Requested destination host doesn't have enough capacity"
"to hold %s" % vm_entry.uuid)
else:
r = RequestEntry.from_scratch(type=RequestType.InitVMMigration,
uuid=request_entry.uuid,
destination=request_entry.destination,
request_prefix=env_vars.get("REQUEST_PREFIX"))
request_pool.put(r)
# If the Request is about a VM that just want to get started/created
else:
# assign_host only returns None when we couldn't be able to assign
# a host to a VM because of resource constraints
try:
assign_host(vm_entry)
except NoSuitableHostFound:
vm_entry.add_log("Can't schedule VM. No Resource Left.")
vm_pool.put(vm_entry)
pending_vms.append(vm_entry)
logger.info("No Resource Left. Emailing admin....")
if __name__ == "__main__":
main()

38
ucloud/settings/__init__.py
View file

@ -23,28 +23,28 @@ class CustomConfigParser(configparser.RawConfigParser):
class Settings(object):
def __init__(self, config_key='/uncloud/config/'):
conf_name = 'ucloud.conf'
conf_dir = os.environ.get('UCLOUD_CONF_DIR', '/etc/ucloud')
config_file = os.path.join(conf_dir, conf_name)
conf_dir = os.environ.get('UCLOUD_CONF_DIR', os.path.expanduser('~/ucloud/'))
self.config_file = os.path.join(conf_dir, conf_name)
self.config_parser = CustomConfigParser(allow_no_value=True)
self.config_key = config_key
self.read_internal_values()
self.read_config_file_values(config_file)
self.config_parser.read(self.config_file)
self.etcd_wrapper_args = tuple()
self.etcd_wrapper_kwargs = {
'host': self.config_parser['etcd']['url'],
'port': self.config_parser['etcd']['port'],
'ca_cert': self.config_parser['etcd']['ca_cert'],
'cert_cert': self.config_parser['etcd']['cert_cert'],
'cert_key': self.config_parser['etcd']['cert_key']
}
def get_etcd_client(self):
args = self.etcd_wrapper_args
kwargs = self.etcd_wrapper_kwargs
args = tuple()
try:
kwargs = {
'host': self.config_parser.get('etcd', 'url'),
'port': self.config_parser.get('etcd', 'port'),
'ca_cert': self.config_parser.get('etcd', 'ca_cert'),
'cert_cert': self.config_parser.get('etcd','cert_cert'),
'cert_key': self.config_parser.get('etcd','cert_key')
}
except configparser.Error as err:
raise configparser.Error('{} in config file {}'.format(err.message, self.config_file)) from err
return Etcd3Wrapper(*args, **kwargs)
def read_internal_values(self):
@ -78,9 +78,11 @@ class Settings(object):
if config_from_etcd:
self.config_parser.read_dict(config_from_etcd.value)
else:
return
sys.exit("No settings found in etcd at key {}".format(self.config_key))
raise KeyError("Key '{}' not found in etcd".format(self.config_key))
def __getitem__(self, key):
self.read_values_from_etcd()
return self.config_parser[key]
settings = Settings()

30
ucloud/shared/__init__.py Normal file
View file

@ -0,0 +1,30 @@
from ucloud.settings import settings
from ucloud.common.vm import VmPool
from ucloud.common.host import HostPool
from ucloud.common.request import RequestPool
from ucloud.common.storage_handlers import get_storage_handler
class Shared:
@property
def etcd_client(self):
return settings.get_etcd_client()
@property
def host_pool(self):
return HostPool(self.etcd_client, settings['etcd']['host_prefix'])
@property
def vm_pool(self):
return VmPool(self.etcd_client, settings['etcd']['vm_prefix'])
@property
def request_pool(self):
return RequestPool(self.etcd_client, settings['etcd']['request_prefix'])
@property
def storage_handler(self):
return get_storage_handler()
shared = Shared()