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import gear
import time
import json
import os
import requests
import urlparse
import signal
import threading
import time
import cliapp
from subprocess import Popen, PIPE, STDOUT
import distbuild
from contextlib import contextmanager
import paramiko
import logging
logging.basicConfig()
#TODO: values from settings
cache_server = 'http://git.baserock.org:8080'
class BuildFailedError(cliapp.AppException):
def __init__(self):
cliapp.AppException.__init__(
self, 'Build Failed')
class GraphFailedError(cliapp.AppException):
def __init__(self):
cliapp.AppException.__init__(
self, 'Graph Failed')
class CacheFailedError(cliapp.AppException):
def __init__(self):
cliapp.AppException.__init__(
self, 'Cache Failed')
@contextmanager
def ssh_manager(host, port, username, key):
'''
returns -> ssh connection ready to be used
'''
# TODO: use an ssh key!!! It isn't working
client = paramiko.client.SSHClient()
client.load_host_keys(key)
client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
client.connect(host, port=port)
try:
yield client
finally:
client.close()
def upload_files(cache_key, suffixes):
print "DEBUG: start upload_files"
cache_dir = '/src/cache/artifacts'
remote_cache_dir = '/src/cache_server/'
files_to_upload = [os.path.join(cache_dir,
cache_key + '.' + suffix)
for suffix in suffixes]
with ssh_manager('127.0.0.1', 22, 'root',
'/root/gerritbot/gerritbot_rsa') as client:
sftp = client.open_sftp()
for single_file in files_to_upload:
remote_dest = os.path.join(remote_cache_dir,
os.path.basename(single_file))
remote_dest_tmp = os.path.join(remote_cache_dir,
os.path.basename(single_file)
+ '.tmp')
print "DEBUG: going to upload %s" % single_file
print "DEBUG: upload destination %s" % remote_dest
try:
sftp.stat(remote_dest)
print "DEBUG: file already exists"
return
except IOError:
print "DEBUG: file not found in cache, uploading"
sftp.put(single_file, remote_dest_tmp)
sftp.rename(remote_dest_tmp, remote_dest)
class CancelationManager(threading.Thread):
def __init__(self):
super(CancelationManager, self).__init__()
self.stopped = False
self.worker = gear.Worker('canceller')
self.worker.addServer('localhost')
self.active = False
def set_cancel_worker(self, cache_key, callback):
self.cache_key = cache_key
self.callback = callback
print "DEBUG: Setting cancel-%s" % self.cache_key
self.worker.registerFunction("cancel-%s" % self.cache_key)
self.active = True
def remove_cancel_worker(self):
print "DEBUG: Removing cancel-%s" % self.cache_key
if self.active:
self.worker.unRegisterFunction("cancel-%s" % self.cache_key)
self.active = False
def cancel_job(self, cache_key):
if not cache_key == self.cache_key:
print "EERRRM.. this is not what I wanted"
self.callback()
self.remove_cancel_worker()
def shutdown(self):
self.stopped = True
self.worker.stopWaitingForJobs()
def run(self):
while not self.stopped:
try:
print "DEBUG: Waiting for cancel job"
job = self.worker.getJob()
self.cancel_job(job.arguments)
job.sendWorkComplete()
except gear.InterruptedError:
pass
class GearWorkerManager(threading.Thread):
def __init__(self, cancelation_manager):
super(GearWorkerManager, self).__init__()
self.stopped = False
self.worker = gear.Worker('reverser')
self.worker.addServer('localhost')
self.worker.registerFunction("reverse")
self.worker.registerFunction("build-graph")
self.worker.registerFunction("build-artifact")
self.worker.registerFunction("cache-request")
self.cancelation_manager = cancelation_manager
def shutdown(self):
self.stopped = True
self.worker.stopWaitingForJobs()
self.cancelation_manager.shutdown()
def run(self):
while not self.stopped:
try:
print "DEBUG: Waiting for job"
job = self.worker.getJob()
self._handle_job(job)
except gear.InterruptedError:
print 'We were asked to stop waiting for jobs'
except BuildFailedError:
print "DEBUG: Build failed"
pass
except GraphFailedError:
print "DEBUG: Graph failed"
pass
except CacheFailedError:
print "DEBUG: Cache failed"
pass
def _handle_job(self, job):
print "DEBUG: Received job '%s'" % job.name
if job.name == "reverse":
print "DEBUG: Starting job reverse with '%s'" % job.arguments
for x in range(0, 100):
job.sendWorkData("This is: %s" % x)
job.sendWorkComplete("answer")
elif job.name == "build-graph":
bg_request=json.loads(job.arguments)
print ("DEBUG: Starting build-graph calculation for Repo: '%s' "
"Ref: '%s' System: '%s'") % (bg_request['repo'],
bg_request['ref'],
bg_request['system'])
# TODO: There should be another way of doing this.
cmd = ['morph', 'calculate-build-graph', '--quiet',
bg_request['repo'], bg_request['ref'], bg_request['system']]
p = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=STDOUT, close_fds=True)
output = p.stdout.read()
p.wait()
if p.returncode != 0:
raise GraphFailedError()
# TODO: catch errors calculating build-graph here instead of sending
# the error as build-graph :)
print "DEBUG: finished computing build graph"
job.sendWorkComplete(output)
elif job.name == "build-artifact":
artifact = distbuild.decode_artifact_reference(job.arguments)
print "building %s" % artifact.name
self.finished = False
cmd = ['morph', 'worker-build', '--build-log-on-stdout', artifact.name]
p = Popen(cmd, stdin=PIPE, stdout=PIPE, stderr=STDOUT, close_fds=True)
def set_finished():
print "DEBUG: Cancelling build"
self.finished = True
p.kill()
cancelation_manager.set_cancel_worker(artifact.cache_key, set_finished)
p.stdin.write(job.arguments)
p.stdin.close()
while not self.finished:
line = p.stdout.readline()
if not line: break
job.sendWorkData(line)
p.wait()
cancelation_manager.remove_cancel_worker()
if p.returncode != 0:
print "DEBUG: FAILED with returncode %s" % p.returncode
raise BuildFailedError()
kind = artifact.kind
if kind == 'chunk':
artifact_names = artifact.source_artifact_names
suffixes = ['%s.%s' % (kind, name) for name in artifact_names]
suffixes.append('build-log')
else:
filename = '%s.%s' % (kind, artifact.name)
suffixes = [filename]
if kind == 'stratum':
suffixes.append(filename + '.meta')
upload_files(artifact.cache_key, suffixes)
job.sendWorkComplete(artifact.cache_key)
elif job.name == 'cache-request':
artifact_names = json.loads(job.arguments)
url = urlparse.urljoin(cache_server, '/1.0/artifacts')
try:
r = requests.post(url, json=artifact_names)
except requests.exceptions.RequestException:
raise CacheFailedError()
job.sendWorkComplete(json.dumps(r.json()))
## From command line gear-worker
def term_handler(signum, frame):
worker_manager.shutdown()
signal.signal(signal.SIGTERM, term_handler)
cancelation_manager = CancelationManager()
cancelation_manager.start()
worker_manager = GearWorkerManager(cancelation_manager)
worker_manager.start()
while not worker_manager.stopped:
try:
time.sleep(3)
except KeyboardInterrupt:
print "Ctrl + C: asking tasks to exit nicely...\n"
worker_manager.shutdown()
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