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# Copyright (c) 2019 Cloudbase Solutions Srl
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
# implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import asyncio
import datetime
import json
import logging
import traceback
import requests
import websockets
from keystoneauth1.exceptions import catalog
from keystoneauth1.exceptions import http
from six.moves.urllib import parse as urlparse
from coriolisclient import base
from coriolisclient import exceptions
LOG = logging.getLogger(__name__)
_LOGGING_ENDPOINT_NAME = "coriolis-logger"
class LoggingClient(object):
def __init__(self, client, endpoint_name_override=None):
self._cli = client
self._ep_name = endpoint_name_override or _LOGGING_ENDPOINT_NAME
self._ep_url = None
try:
self._ep_url = self._get_endpoint_url(self._ep_name)
except Exception as ex:
LOG.warning(
"Unable to determine logging endpoint: %s", str(ex))
@property
def _token(self):
return self._cli.get_token()
def _get_endpoint_url(self, name):
try:
url = self._cli.get_endpoint(service_type=name)
if url is None:
raise catalog.EndpointNotFound()
return url.rstrip("/")
except catalog.EndpointNotFound:
raise exceptions.LoggingEndpointNotFound()
except http.Unauthorized as ex:
LOG.exception(traceback.format_exc())
raise exceptions.HTTPAuthError(
"Failed to authorize Keystone session. Please recheck "
"credentials. The error message received from Keystone was: "
"%s" % str(ex))
@property
def _auth_headers(self):
head = {
"X-Auth-Token": self._token,
}
return head
def _construct_url(self, resource, query_args={}, is_websocket=False):
args = {}
for i in query_args:
if query_args[i] is None:
continue
args[i] = query_args[i]
if not self._ep_url:
self._ep_url = self._get_endpoint_url(self._ep_name)
url = "%s/%s" % (self._ep_url, resource)
if len(args):
url += "?" + urlparse.urlencode(args)
parsed = urlparse.urlparse(url)
if is_websocket:
wsScheme = "ws"
if parsed.scheme == "https":
wsScheme = "wss"
newURL = parsed._replace(scheme=wsScheme)
url = newURL.geturl()
return url
def stream_logs(self, app_name=None, severity=None):
headers = self._auth_headers
args = {
"app_name": app_name,
"severity": severity,
}
url = self._construct_url("ws", args, is_websocket=True)
async def nested():
async with websockets.connect(url, extra_headers=headers) as ws:
while True:
msg = await ws.recv()
as_dict = json.loads(msg)
if app_name is None:
app = "\033[2m\033[1m%s\x1b[0m" % as_dict["app_name"]
spacing = (" " *
(max((22 - len(as_dict["app_name"]), 1))))
print("%s>>%s%s" % (app, spacing, as_dict["message"]))
else:
print(as_dict["message"])
try:
asyncio.get_event_loop().run_until_complete(nested())
except KeyboardInterrupt:
pass
def _convert_period_to_timestamp(self, period):
if period is None:
return None
try:
_ = datetime.datetime.fromtimestamp(int(period))
return int(period)
except (OverflowError, OSError):
LOG.warning("Failed to initialize timestamp from period value: %d",
period)
except ValueError:
LOG.warning("Invalid value type for period: %s", period)
units = {
"s": "seconds",
"m": "minutes",
"h": "hours",
"d": "days",
"w": "weeks"}
try:
count = period[:-1]
unit = period[-1]
except Exception:
raise exceptions.CoriolisException("Failed to parse period")
conv_unit = units.get(unit)
if conv_unit is None:
raise exceptions.CoriolisException("invalid period %s" % period)
args = {conv_unit: count}
tm = datetime.datetime.utcnow() - datetime.timedelta(**args)
return int(tm.timestamp())
def download_logs(self, app, to, start_time=None, end_time=None):
if app == "":
raise exceptions.CoriolisException("missing app_name")
headers = self._auth_headers
args = {
"start_date": self._convert_period_to_timestamp(start_time),
"end_date": self._convert_period_to_timestamp(end_time),
}
resource = "logs/%s/" % app
url = self._construct_url(resource, args)
with requests.get(url, headers=headers, stream=True) as r:
r.raise_for_status()
with open(to, 'wb') as fd:
for chunk in r.iter_content(chunk_size=8192):
if chunk:
fd.write(chunk)
def list_logs(self):
headers = self._auth_headers
url = self._construct_url("logs/")
req = requests.get(url, headers=headers)
req.raise_for_status()
ret = req.json()
return ret.get("logs", [])
class CoriolisLogger(base.Resource):
pass
class CoriolisLogDownloadManager(base.BaseManager):
resource_class = CoriolisLogger
def __init__(self, api):
super(CoriolisLogDownloadManager, self).__init__(api)
self._coriolis_cli = LoggingClient(api)
def list(self):
logs = self._coriolis_cli.list_logs()
res = []
for i in logs:
res.append(
self.resource_class(self, i, loaded=True))
return res
def get(self, app, to, start_time=None, end_time=None):
return self._coriolis_cli.download_logs(
app, to, start_time=start_time, end_time=end_time)
def stream(self, app_name=None, severity=None):
self._coriolis_cli.stream_logs(
app_name=app_name, severity=severity)
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