334 lines
12 KiB
Python
Executable File
334 lines
12 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (c) 2017 Red Hat
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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# implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import asyncio
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import json
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import logging
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import os
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import time
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import uvloop
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import aiohttp
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from aiohttp import web
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import zuul.rpcclient
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from zuul.web.handler import StaticHandler
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STATIC_DIR = os.path.join(os.path.dirname(__file__), 'static')
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class LogStreamingHandler(object):
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log = logging.getLogger("zuul.web.LogStreamingHandler")
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def __init__(self, rpc):
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self.rpc = rpc
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def setEventLoop(self, event_loop):
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self.event_loop = event_loop
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async def _fingerClient(self, ws, server, port, job_uuid):
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"""
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Create a client to connect to the finger streamer and pull results.
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:param aiohttp.web.WebSocketResponse ws: The websocket response object.
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:param str server: The executor server running the job.
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:param str port: The executor server port.
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:param str job_uuid: The job UUID to stream.
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"""
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self.log.debug("Connecting to finger server %s:%s", server, port)
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reader, writer = await asyncio.open_connection(host=server, port=port,
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loop=self.event_loop)
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self.log.debug("Sending finger request for %s", job_uuid)
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msg = "%s\n" % job_uuid # Must have a trailing newline!
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writer.write(msg.encode('utf8'))
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await writer.drain()
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while True:
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data = await reader.read(1024)
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if data:
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await ws.send_str(data.decode('utf8'))
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else:
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writer.close()
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return
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async def _streamLog(self, ws, request):
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"""
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Stream the log for the requested job back to the client.
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:param aiohttp.web.WebSocketResponse ws: The websocket response object.
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:param dict request: The client request parameters.
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"""
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for key in ('uuid', 'logfile'):
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if key not in request:
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return (4000, "'{key}' missing from request payload".format(
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key=key))
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# Schedule the blocking gearman work in an Executor
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gear_task = self.event_loop.run_in_executor(
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None,
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self.rpc.get_job_log_stream_address,
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request['uuid'],
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)
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try:
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port_location = await asyncio.wait_for(gear_task, 10)
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except asyncio.TimeoutError:
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return (4010, "Gearman timeout")
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if not port_location:
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return (4011, "Error with Gearman")
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try:
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await self._fingerClient(
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ws, port_location['server'], port_location['port'],
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request['uuid']
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)
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except Exception as e:
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self.log.exception("Finger client exception:")
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msg = "Failure from finger client: %s" % e
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await ws.send_str(msg.decode('utf8'))
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return (1000, "No more data")
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async def processRequest(self, request):
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"""
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Handle a client websocket request for log streaming.
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:param aiohttp.web.Request request: The client request.
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"""
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try:
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ws = web.WebSocketResponse()
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await ws.prepare(request)
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async for msg in ws:
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if msg.type == aiohttp.WSMsgType.TEXT:
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req = json.loads(msg.data)
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self.log.debug("Websocket request: %s", req)
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code, msg = await self._streamLog(ws, req)
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# We expect to process only a single message. I.e., we
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# can stream only a single file at a time.
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await ws.close(code=code, message=msg)
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break
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elif msg.type == aiohttp.WSMsgType.ERROR:
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self.log.error(
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"Websocket connection closed with exception %s",
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ws.exception()
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)
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break
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elif msg.type == aiohttp.WSMsgType.CLOSED:
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break
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except asyncio.CancelledError:
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self.log.debug("Websocket request handling cancelled")
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pass
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except Exception as e:
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self.log.exception("Websocket exception:")
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await ws.close(code=4009, message=str(e).encode('utf-8'))
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return ws
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class GearmanHandler(object):
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log = logging.getLogger("zuul.web.GearmanHandler")
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# Tenant status cache expiry
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cache_expiry = 1
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def __init__(self, rpc):
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self.rpc = rpc
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self.cache = {}
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self.cache_time = {}
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self.controllers = {
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'tenant_list': self.tenant_list,
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'status_get': self.status_get,
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'job_list': self.job_list,
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'key_get': self.key_get,
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}
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async def tenant_list(self, request):
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job = self.rpc.submitJob('zuul:tenant_list', {})
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return web.json_response(json.loads(job.data[0]))
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async def status_get(self, request):
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tenant = request.match_info["tenant"]
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if tenant not in self.cache or \
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(time.time() - self.cache_time[tenant]) > self.cache_expiry:
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job = self.rpc.submitJob('zuul:status_get', {'tenant': tenant})
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self.cache[tenant] = json.loads(job.data[0])
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self.cache_time[tenant] = time.time()
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resp = web.json_response(self.cache[tenant])
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resp.headers['Access-Control-Allow-Origin'] = '*'
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resp.headers["Cache-Control"] = "public, max-age=%d" % \
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self.cache_expiry
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resp.last_modified = self.cache_time[tenant]
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return resp
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async def job_list(self, request):
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tenant = request.match_info["tenant"]
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job = self.rpc.submitJob('zuul:job_list', {'tenant': tenant})
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resp = web.json_response(json.loads(job.data[0]))
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resp.headers['Access-Control-Allow-Origin'] = '*'
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return resp
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async def key_get(self, request):
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tenant = request.match_info["tenant"]
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project = request.match_info["project"]
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job = self.rpc.submitJob('zuul:key_get', {'tenant': tenant,
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'project': project})
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return web.Response(body=job.data[0])
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async def processRequest(self, request, action):
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try:
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resp = await self.controllers[action](request)
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except asyncio.CancelledError:
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self.log.debug("request handling cancelled")
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except Exception as e:
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self.log.exception("exception:")
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resp = web.json_response({'error_description': 'Internal error'},
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status=500)
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return resp
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class ZuulWeb(object):
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log = logging.getLogger("zuul.web.ZuulWeb")
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def __init__(self, listen_address, listen_port,
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gear_server, gear_port,
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ssl_key=None, ssl_cert=None, ssl_ca=None,
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static_cache_expiry=3600,
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connections=None):
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self.listen_address = listen_address
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self.listen_port = listen_port
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self.event_loop = None
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self.term = None
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self.server = None
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self.static_cache_expiry = static_cache_expiry
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# instanciate handlers
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self.rpc = zuul.rpcclient.RPCClient(gear_server, gear_port,
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ssl_key, ssl_cert, ssl_ca)
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self.log_streaming_handler = LogStreamingHandler(self.rpc)
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self.gearman_handler = GearmanHandler(self.rpc)
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self._plugin_routes = [] # type: List[zuul.web.handler.BaseWebHandler]
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connections = connections or []
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for connection in connections:
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self._plugin_routes.extend(connection.getWebHandlers(self))
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async def _handleWebsocket(self, request):
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return await self.log_streaming_handler.processRequest(
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request)
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async def _handleTenantsRequest(self, request):
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return await self.gearman_handler.processRequest(request,
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'tenant_list')
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async def _handleStatusRequest(self, request):
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return await self.gearman_handler.processRequest(request, 'status_get')
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async def _handleJobsRequest(self, request):
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return await self.gearman_handler.processRequest(request, 'job_list')
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async def _handleKeyRequest(self, request):
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return await self.gearman_handler.processRequest(request, 'key_get')
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def run(self, loop=None):
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"""
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Run the websocket daemon.
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Because this method can be the target of a new thread, we need to
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set the thread event loop here, rather than in __init__().
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:param loop: The event loop to use. If not supplied, the default main
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thread event loop is used. This should be supplied if ZuulWeb
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is run within a separate (non-main) thread.
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"""
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routes = [
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('GET', '/tenants.json', self._handleTenantsRequest),
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('GET', '/{tenant}/status.json', self._handleStatusRequest),
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('GET', '/{tenant}/jobs.json', self._handleJobsRequest),
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('GET', '/{tenant}/console-stream', self._handleWebsocket),
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('GET', '/{tenant}/{project:.*}.pub', self._handleKeyRequest),
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]
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static_routes = [
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StaticHandler(self, '/{tenant}/status.html'),
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StaticHandler(self, '/{tenant}/jobs.html'),
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StaticHandler(self, '/{tenant}/stream.html'),
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StaticHandler(self, '/tenants.html', 'index.html'),
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StaticHandler(self, '/', 'index.html'),
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]
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for route in static_routes + self._plugin_routes:
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routes.append((route.method, route.path, route.handleRequest))
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self.log.debug("ZuulWeb starting")
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asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
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user_supplied_loop = loop is not None
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if not loop:
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loop = asyncio.get_event_loop()
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asyncio.set_event_loop(loop)
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self.event_loop = loop
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self.log_streaming_handler.setEventLoop(loop)
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app = web.Application()
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for method, path, handler in routes:
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app.router.add_route(method, path, handler)
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app.router.add_static('/static', STATIC_DIR)
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handler = app.make_handler(loop=self.event_loop)
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# create the server
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coro = self.event_loop.create_server(handler,
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self.listen_address,
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self.listen_port)
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self.server = self.event_loop.run_until_complete(coro)
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self.term = asyncio.Future()
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# start the server
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self.event_loop.run_until_complete(self.term)
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# cleanup
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self.log.debug("ZuulWeb stopping")
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self.server.close()
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self.event_loop.run_until_complete(self.server.wait_closed())
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self.event_loop.run_until_complete(app.shutdown())
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self.event_loop.run_until_complete(handler.shutdown(60.0))
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self.event_loop.run_until_complete(app.cleanup())
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self.log.debug("ZuulWeb stopped")
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# Only run these if we are controlling the loop - they need to be
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# run from the main thread
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if not user_supplied_loop:
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loop.stop()
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loop.close()
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self.rpc.shutdown()
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def stop(self):
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if self.event_loop and self.term:
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self.event_loop.call_soon_threadsafe(self.term.set_result, True)
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if __name__ == "__main__":
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logging.basicConfig(level=logging.DEBUG)
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loop = asyncio.get_event_loop()
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loop.set_debug(True)
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z = ZuulWeb(listen_address="127.0.0.1", listen_port=9000,
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gear_server="127.0.0.1", gear_port=4730)
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z.run(loop)
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