def start_block(self, data):
try:
if using_engage:
block_name = data["name"]
block_version = data["version"] if data.has_key("version") \
else naming.DEFAULT_VERSION
resource_key = naming.get_block_resource_key(block_name,
block_version)
logger.info("Using engage to install resource %s" % resource_key)
datablox_engage_adapter.install.install_block(resource_key)
logger.info("Install of %s and its dependencies successful" % \
resource_key)
config_name = os.path.join(self.config_dir,
data["name"] + str(self.file_num) + ".json")
poll_file_name = os.path.join(self.config_dir,
data["name"] + str(self.file_num) + "_poll.json")
self.file_num += 1
with open(config_name, 'w') as config_file:
json.dump(data, config_file)
load_block_script = os.path.join(os.path.dirname(__file__),
"load_block.py")
command = [sys.executable, load_block_script, self.bloxpath, config_name, poll_file_name]
if self.log_dir:
command.append(self.log_dir)
logger.debug("Running command %s" % command)
p = subprocess.Popen(command)
self.processes[p] = [data["id"], poll_file_name]
except Exception, e:
logger.exception("Got exception %s when processing ADD BLOCK message" % e)
return False
def main(argv):
global processes, socket
# setup logging
root_logger = logging.getLogger()
if len(root_logger.handlers)==0:
console_handler = logging.StreamHandler(sys.stdout)
if using_engage:
log_level = logging.DEBUG # stdout is going to a file anyway
else:
log_level = logging.INFO
console_handler.setLevel(log_level)
root_logger.addHandler(console_handler)
root_logger.setLevel(log_level)
usage = "%prog [options]"
parser = OptionParser(usage=usage)
parser.add_option("-b", "--bloxpath", dest="bloxpath", default=None,
help="use this path instead of the environment variable BLOXPATH")
parser.add_option("--config-dir", dest="config_dir", default=".",
help="directory to use for storing configuration files for the individual blocks")
parser.add_option("--log-dir", dest="log_dir", default=None,
help="Directory to use for log files, if not specified just use the console")
(options, args) = parser.parse_args(argv)
signal.signal(signal.SIGTERM, sigterm_handler)
bloxpath = options.bloxpath
if bloxpath == None:
if not os.environ.has_key("BLOXPATH"):
parser.error("Need to set BLOXPATH environment variable or pass it as an argument")
else:
bloxpath = os.environ["BLOXPATH"]
if not os.path.isdir(bloxpath):
parser.error("BLOXPATH %s does not exist or is not a directory" % bloxpath)
config_dir = os.path.abspath(os.path.expanduser(options.config_dir))
if not os.path.isdir(config_dir):
parser.error("Configuration file directory %s does not exist or is not a directory" % config_dir)
if options.log_dir:
log_dir = os.path.abspath(os.path.expanduser(options.log_dir))
if not os.path.isdir(log_dir):
try:
os.makedirs(log_dir)
except:
parser.error("Log directory %s does not exist and attempt at creating it failed" % log_dir)
else: # log_dir was not specified, use stdout
log_dir = None
logger.info("Caretaker starting, BLOXPATH=%s, using_engage=%s" %
(bloxpath, using_engage))
if not using_engage:
start_fileserver()
context = zmq.Context()
socket = context.socket(zmq.REP)
socket.bind('tcp://*:5000')
os.system("rm %s/*.json" % config_dir)
file_num = 0
logger.info('Care taker loaded')
while True:
try:
message = socket.recv()
control_data = json.loads(message)
logger.info("[caretaker] received msg: " + message)
control, data = control_data
if control == "ADD NODE":
try:
if using_engage:
block_name = data["name"]
block_version = data["version"] if data.has_key("version") \
else naming.DEFAULT_VERSION
resource_key = naming.get_block_resource_key(block_name,
block_version)
logger.info("Using engage to install resource %s" % resource_key)
datablox_engage_adapter.install.install_block(resource_key)
logger.info("Install of %s and its dependencies successful" % \
resource_key)
config_name = os.path.join(config_dir,
data["name"] + str(file_num) + ".json")
file_num += 1
with open(config_name, 'w') as config_file:
json.dump(data, config_file)
load_block_script = os.path.join(os.path.dirname(__file__),
"load_block.py")
command = [sys.executable, load_block_script, bloxpath, config_name]
if log_dir:
command.append(log_dir)
logger.debug("Running command %s" % command)
p = subprocess.Popen(command)
processes.append(p)
except Exception, e:
logger.exception("Got exception %s when processing ADD NODE message" % e)
socket.send(json.dumps(False))
continue
socket.send(json.dumps(True))
elif control == "STOP ALL":
stop_all()
processes = []
socket.send(json.dumps(True))
else:
logger.info("[caretaker] **Warning could not understand master")