pegasus-monitord - tracks a workflow progress, mining information
pegasus-monitord [--help|-help] [--verbose|-v]
[--adjust|-a i] [--foreground|-N]
[--no-daemon|-n] [--job|-j jobstate.log file]
[--log|-l logfile] [--conf properties file]
[--no-recursive] [--no-database | --no-events]
[--sim|-s millisleep] [--db-stats]
[--socket] [--output-dir | -o dir]
[--dest|-d PATH or URL] [--encoding|-e bp | bson]
DAGMan output file
This program follows a workflow, parsing the output of DAGMAN's dagman.out file. In addition to generating the jobstate.log file,
pegasus-monitord can also be used mine information from the workflow dag file and jobs' submit and output files, and either populate a
database or write a NetLogger events file with that information. pegasus-monitord can also perform notifications when tracking a workflow's
progress in real-time.
Prints a usage summary with all the available command-line options.
Sets the log level for pegasus-monitord. If omitted, the default level will be set to WARNING. When this option is given, the log level
is changed to INFO. If this option is repeated, the log level will be changed to DEBUG.
The log level in pegasus-monitord can also be adjusted interactively, by sending the USR1 and USR2 signals to the process, respectively
for incrementing and decrementing the log level.
-a i, --adjust i
For adjusting time zone differences by i seconds, default is 0.
Do not daemonize pegasus-monitord, go through the motions as if (Condor).
Do not daemonize pegasus-monitord, keep it in the foreground (for debugging).
-j jobstate.log file, --job jobstate.log file
Alternative location for the jobstate.log file. The default is to write a jobstate.log in the workflow directory. An absolute file name
should only be used if the workflow does not have any sub-workflows, as each sub-workflow will generate its own jobstate.log file. If
an alternative, non-absolute, filename is given with this option, pegasus-monitord will create one file in each workflow (and
sub-workflow) directory with the filename provided by the user with this option. If an absolute filename is provided and sub-workflows
are found, a warning message will be printed and pegasus-monitord will not track any sub-workflows.
--log logfile, --log-file logfile
Specifies an alternative logfile to use instead of the monitord.log file in the main workflow directory. Differently from the
jobstate.log file above, pegasus-monitord only generates one logfile per execution (and not one per workflow and sub-workflow it
is an alternative file containing properties in the key=value format, and allows users to override values read from the braindump.txt
file. This option has precedence over the properties file specified in the braindump.txt file. Please note that these properties will
apply not only to the main workflow, but also to all sub-workflows found.
This options disables pegasus-monitord to automatically follow any sub-workflows that are found.
--nodatabase, --no-database, --no-events
Turns off generating events (when this option is given, pegasus-monitord will only generate the jobstate.log file). The default is to
automatically log information to a SQLite database (see the --dest option below for more details). This option overrides any parameter
given by the --dest option.
This option is used to replay the output of an already finished workflow. It should only be used after the workflow is finished (not
necessarily successfully). If a jobstate.log file is found, it will be rotated. However, when using a database, all previous references
to that workflow (and all its sub-workflows) will be erased from it. When outputing to a bp file, the file will be deleted. When
running in replay mode, pegasus-monitord will always run with the --no-daemon option, and any errors will be output directly to the
terminal. Also, pegasus-monitord will not process any notifications while in replay mode.
This options disables notifications completely, making pegasus-monitord ignore all the .notify files for all workflows it tracks.
This option sets the maximum number of concurrent notifications that pegasus-monitord will start. When the max_notifications limit is
reached, pegasus-monitord will queue notifications and wait for a pending notification script to finish before starting a new one. If
max_notifications is set to 0, notifications will be disabled.
Normally, pegasus-monitord will start a notification script and wait indefinitely for it to finish. This option allows users to set up
a maximum timeout that pegasus-monitord will wait for a notification script to finish before terminating it. If notification scripts do
not finish in a reasonable amount of time, it can cause other notification scripts to be queued due to the maximum number of concurrent
scripts allowed by pegasus-monitord. Additionally, until all notification scripts finish, pegasus-monitord will not terminate.
-s millisleep, --sim millisleep
This option simulates delays between reads, by sleeping millisleep milliseconds. This option is mainly used by developers.
This option causes the database module to collect and print database statistics at the end of the execution. It has no effect if the
--no-database option is given.
This option causes pegasus-monitord not to populate jobs' stdout and stderr into the BP file or the Stampede database. It should be
used to avoid increasing the database size substantially in cases where jobs are very verbose in their output.
This option causes pegasus-monitord to skip checking for another instance of itself already running on the same workflow directory. The
default behavior prevents two or more pegasus-monitord instances from starting and running simultaneously (which would cause the bp
file and database to be left in an unstable state). This option should noly be used when the user knows the previous instance of
pegasus-monitord is NOT running anymore.
This option causes pegasus-monitord to start a socket interface that can be used for advanced debugging. The port number for connecting
to pegasus-monitord can be found in the monitord.sock file in the workflow directory (the file is deleted when pegasus-monitord
finishes). If not already started, the socket interface is also created when pegasus-monitord receives a USR1 signal.
-o dir, --ouput-dir dir
When this option is given, pegasus-monitord will create all its output files in the directory specified by dir. This option is useful
for allowing a user to debug a workflow in a directory the user does not have write permissions. In this case, all files generated by
pegasus-monitord will have the workflow wf_uuid as a prefix so that files from multiple sub-workflows can be placed in the same
directory. This option is mainly used by pegasus-analyzer. It is important to note that the location for the output BP file or database
is not changed by this option and should be set via the --dest option.
-d URL params, --dest URL params
This option allows users to specify the destination for the log events generated by pegasus-monitord. If this option is omitted,
pegasus-monitord will create a SQLite database in the workflow's run directory with the same name as the workflow, but with a
.stampede.db prefix. For an empty scheme, params are a file path with - meaning standard output. For a x-tcp scheme, params are
TCP_host[:port=14380]. For a database scheme, params are a SQLAlchemy engine URL with a database connection string that can be used to
specify different database engines. Please see the examples section below for more information on how to use this option. Note that
when using a database engine other than sqlite, the necessary Python database drivers will need to be installed.
-e encoding, --encoding encoding
This option specifies how to encode log events. The two available possibilities are bp and bson. If this option is not specified,
events will be generated in the bp format.
The DAGMan_output_file is the only requires command-line argument in pegasus-monitord and must have the .dag.dagman.out extension.
If the plan could be constructed, pegasus-monitord returns with an exit code of 0. However, in case of error, a non-zero exit code
indicates problems. In that case, the logfile should contain additional information about the error condition.
pegasus-monitord does not require that any environmental variables be set. It locates its required Python modules based on its own
location, and therefore should not be moved outside of Pegasus' bin directory.
Usually, pegasus-monitord is invoked automatically by pegasus-run and tracks the workflow progress in real-time, producing the jobstate.log
file and a corresponding SQLite database. When a workflow fails, and is re-submitted with a rescue DAG, pegasus-monitord will automatically
pick up from where it left previously and continue the jobstate.log file and the database.
If users need to create the jobstate.log file after a workflow is already finished, the --replay | -r option should be used when running
pegasus-monitord manually. For example:
$ pegasus_monitord -r diamond-0.dag.dagman.out
will launch pegasus-monitord in replay mode. In this case, if a jobstate.log file already exists, it will be rotated and a new file will be
created. If a diamond-0.stampede.db SQLite database already exists, pegasus-monitord will purge all references to the workflow id specified
in the braindump.txt file, including all sub-workflows associated with that workflow id.
$ pegasus_monitord -r --no-database diamond-0.dag.dagman.out
will do the same thing, but without generating any log events.
$ pegasus_monitord -r --dest `pwd`/diamond-0.bp diamond-0.dag.dagman.out
will create the file diamond-0.bp in the current directory, containing NetLogger events with all the workflow data. This is in addition to
the jobstate.log file.
For using a database, users should provide a database connection string in the format of:
Where dialect is the name of the underlying driver (mysql, sqlite, oracle, postgres) and database is the name of the database running on
the server at the host computer.
If users want to use a different SQLite database, pegasus-monitord requires them to specify the absolute path of the alternate file. For
$ pegasus_monitord -r --dest sqlite:////home/user/diamond_database.db diamond-0.dag.dagman.out
Here are docs with details for all of the supported drivers: http://www.sqlalchemy.org/docs/05/reference/dialects/index.html
Additional per-database options that work into the connection strings are outlined there.
It is important to note that one will need to have the appropriate db interface library installed. Which is to say, SQLAlchemy is a wrapper
around the mysql interface library (for instance), it does not provide a MySQL driver itself. The Pegasus distribution includes both
SQLAlchemy and the SQLite Python driver.
As a final note, it is important to mention that unlike when using SQLite databases, using SQLAlchemy with other database servers, e.g.
MySQL or Postgres, the target database needs to exist. So, if a user wanted to connect to:
it would need to first connect to the server at localhost and issue the appropriate create database command before running pegasus-monitord
as SQLAlchemy will take care of creating the tables and indexes if they do not already exist.
Gaurang Mehta <gmehta at isi dot edu>
Fabio Silva <fabio at isi dot edu>
Karan Vahi <vahi at isi dot edu>
Jens-S. Vockler <voeckler at isi dot edu>
Pegasus Team http://pegasus.isi.edu