def spark(self, line, cell="", local_ns=None):
if self._do_not_call_start_session(u""):
args = parse_argstring_or_throw(self.spark, line)
coerce = get_coerce_value(args.coerce)
self.execute_spark(cell, args.output, args.samplemethod, args.maxrows, args.samplefraction, None, coerce)
else:
return
def sql(self, line, cell="", local_ns=None):
if not self._do_not_call_start_session(""):
return
args = parse_argstring_or_throw(self.sql, line)
coerce = get_coerce_value(args.coerce)
return self.execute_sqlquery(cell, args.samplemethod, args.maxrows,
args.samplefraction, None, args.output,
args.quiet, coerce)
def spark(self, line, cell="", local_ns=None):
"""Magic to execute spark remotely.
This magic allows you to create a Livy Scala or Python session against a Livy endpoint. Every session can
be used to execute either Spark code or SparkSQL code by executing against the SQL context in the session.
When the SQL context is used, the result will be a Pandas dataframe of a sample of the results.
If invoked with no subcommand, the cell will be executed against the specified session.
Subcommands
-----------
info
Display the available Livy sessions and other configurations for sessions.
add
Add a Livy session given a session name (-s), language (-l), and endpoint credentials.
The -k argument, if present, will skip adding this session if it already exists.
e.g. `%spark add -s test -l python -u https://sparkcluster.net/livy -t Kerberos -a u -p -k`
config
Override the livy session properties sent to Livy on session creation. All session creations will
contain these config settings from then on.
Expected value is a JSON key-value string to be sent as part of the Request Body for the POST /sessions
endpoint in Livy.
e.g. `%%spark config`
`{"driverMemory":"1000M", "executorCores":4}`
run
Run Spark code against a session.
e.g. `%%spark -s testsession` will execute the cell code against the testsession previously created
e.g. `%%spark -s testsession -c sql` will execute the SQL code against the testsession previously created
e.g. `%%spark -s testsession -c sql -o my_var` will execute the SQL code against the testsession
previously created and store the pandas dataframe created in the my_var variable in the
Python environment.
logs
Returns the logs for a given session.
e.g. `%spark logs -s testsession` will return the logs for the testsession previously created
delete
Delete a Livy session.
e.g. `%spark delete -s defaultlivy`
cleanup
Delete all Livy sessions created by the notebook. No arguments required.
e.g. `%spark cleanup`
"""
usage = "Please look at usage of %spark by executing `%spark?`."
user_input = line
args = parse_argstring_or_throw(self.spark, user_input)
subcommand = args.command[0].lower()
if args.auth is None:
args.auth = conf.get_auth_value(args.user, args.password)
else:
args.auth = args.auth
# info
if subcommand == "info":
if args.url is not None:
endpoint = Endpoint(args.url, args.auth, args.user, args.password)
info_sessions = self.spark_controller.get_all_sessions_endpoint_info(endpoint)
self._print_endpoint_info(info_sessions)
else:
self._print_local_info()
# config
elif subcommand == "config":
conf.override(conf.session_configs.__name__, json.loads(cell))
#conf file
elif subcommand == "encoded":
language = args.language
session = args.session
conf_json = json.loads(base64.b64decode(args.encodedconf).decode('utf-8'))
lang_args = conf_json['kernel_{}_credentials'.format(language)]
url = lang_args['url']
auth = lang_args['auth']
username = lang_args['username']
password = lang_args['base64_password']
conf.override_all(conf_json)
properties = conf.get_session_properties(language)
if url is not None:
endpoint = Endpoint(url, auth, username, password)
info_sessions = self.spark_controller.get_all_sessions_endpoint_info(endpoint)
if session in info_sessions:
print("found session")
else:
self.spark_controller.add_session(session, endpoint, True, properties)
coerce = get_coerce_value(args.coerce)
if args.context == CONTEXT_NAME_SPARK:
return self.execute_spark(cell, args.output, args.samplemethod,
args.maxrows, args.samplefraction, session, coerce)
elif args.context == CONTEXT_NAME_SQL:
return self.execute_sqlquery(cell, args.samplemethod, args.maxrows, args.samplefraction,
session, args.output, args.quiet, coerce)
else:
self.ipython_display.send_error("Context '{}' not found".format(args.context))
#check if session already exists
# add
elif subcommand == "add":
if args.url is None:
self.ipython_display.send_error("Need to supply URL argument (e.g. -u https://example.com/livyendpoint)")
return
name = args.session
language = args.language
endpoint = Endpoint(args.url, args.auth, args.user, args.password)
skip = args.skip
properties = conf.get_session_properties(language)
self.spark_controller.add_session(name, endpoint, skip, properties)
# delete
elif subcommand == "delete":
if args.session is not None:
self.spark_controller.delete_session_by_name(args.session)
elif args.url is not None:
if args.id is None:
self.ipython_display.send_error("Must provide --id or -i option to delete session at endpoint from URL")
return
endpoint = Endpoint(args.url, args.auth, args.user, args.password)
session_id = args.id
self.spark_controller.delete_session_by_id(endpoint, session_id)
else:
self.ipython_display.send_error("Subcommand 'delete' requires a session name or a URL and session ID")
# cleanup
elif subcommand == "cleanup":
if args.url is not None:
endpoint = Endpoint(args.url, args.auth, args.user, args.password)
self.spark_controller.cleanup_endpoint(endpoint)
else:
self.spark_controller.cleanup()
# logs
elif subcommand == "logs":
self.ipython_display.write(self.spark_controller.get_logs(args.session))
# run
elif len(subcommand) == 0:
coerce = get_coerce_value(args.coerce)
if args.context == CONTEXT_NAME_SPARK:
return self.execute_spark(cell, args.output, args.samplemethod,
args.maxrows, args.samplefraction, args.session, coerce)
elif args.context == CONTEXT_NAME_SQL:
return self.execute_sqlquery(cell, args.samplemethod, args.maxrows, args.samplefraction,
args.session, args.output, args.quiet, coerce)
else:
self.ipython_display.send_error("Context '{}' not found".format(args.context))
# error
else:
self.ipython_display.send_error("Subcommand '{}' not found. {}".format(subcommand, usage))
