VRPipe is a generic pipeline system designed for use by the Vertebrate Resequencing team at the Sanger Institute, but also for broad use for anyone.
See the wiki for further details, including comprehensive installation and usage guides. There is also a complete guide for using VRPipe in Amazon's cloud, suitable even for those who have never used the cloud before.
The rest of this document covers the essentials, and includes some installation advice (how to install problematic CPAN dependencies) not present on the wiki.
NB: when upgrading, always read the IMPORTANT_NOTES file and follow the guidance for all versions since your currently installed version.
You need Neo4J 2.2.1 or greater installed. You could use the same installation for both production and testing, but it is safer to use 2 different ones (these can run on the same machine). Edit neo4j-server.properties to enable non-localhost access, and change ports for each different install. Neo4J can be download from here: http://neo4j.com
You need Redis 2.6 or greater installed. Compile it as normal ('make') and simply include redis-server in your PATH. You do not have to configure it in any way. But note that its maximum number of connections is capped by the max file descriptors limit imposed on the user that will run vrpipe-server, so make sure that limit (ulimit -n) is higher than the number of CPUs in your cluster. Redis can be downloaded from here: http://redis.io/download
It is recommended that you set PERL_INLINE_DIRECTORY to ~/.Inline and create that directory.
For dealing with sam/bam/cram/vcf/bcf related steps and pipelines, you will need the source version of samtools < v1 compiled with -fPIC and -m64 in the CFLAGS, and the environment variable SAMTOOLS pointing to that source directory (which should now contain bam.h and libbam.a, and MUST contain the samtools executable). Old samtools can be downloaded from here: https://github.com/samtools/samtools/tree/0.1.20 (Note that tests use the samtools in your PATH, not the samtools in your SAMTOOLS dir; production pipelines will use the samtools at the absolute path you configure them with during setup - the default will be the first one in your PATH.) You will also need samtools v1.3+ (https://github.com/samtools/samtools) for use in your actual setups, and htslib (https://github.com/samtools/htslib) installed and pointed to with the HTSLIB environment variable. Be sure to configure it with support for irods files if you expect to work with files stored in irods.
You require Module::Build in order for the Build.PL script to work. It is recommended you 'install Bundle::CPAN' using 'cpan' prior to attempting setup.
First, do the initial setup and dependency installation:
If this says you have "ERRORS/WARNINGS FOUND IN PREREQUISITES" try:
to install missing prerequisites from CPAN.
installdeps will install things automatically in some random order, but ideally you should manually install certain modules in a specific order:
Possible problems you may encounter in installing your missing prerequisites:
- You may find that you have to unset your LANG environment variable temporarily to install all CPAN prerequisites.
- You will likely find that Inline::Filters fails its preprocess.t test; this is
ok and you can manually use
cpan> force install Inline::Filters
- If you have trouble with Authen::PAM (required by Authen::Simple::PAM), you
may have to install it manually instead of via a non-interactive system like
cpan minus. Enter the build directory where it tried to build Authen::PAM,
- You may find that MooseX::Types::Parameterizable fails its tests. In that case
you can manually use 'cpan' to install an earlier version that should work:
cpan> install JJNAPIORK/MooseX-Types-Parameterizable-0.07.tar.gz
- If you find that AnyEvent::ForkManager fails tests and emits errors
mentioning WNOHANG, you will have to cd to the cpan build directory and edit
line 11 of blib/lib/AnyEvent/ForkManager.pm to read "use POSIX qw(WNOHANG);"
(without the quotes). Then you can do
- Twiggy may fail its disconnect.t test. This is safe to ignore; just:
cpan> force install Twiggy
- You may encounter difficulties installing Proc::ProcessTable, which is one of
Proc::Killfam's dependencies. In that case, try manually installing an earlier
version of it before retrying the Proc::Killfam install normally:
cpan> install DURIST/Proc-ProcessTable-0.44.tar.gz
- If you find that once everything is up and running your logs are filled with warnings like: percent cpu truncated from 11, set LENGTH_PCTCPU to at least: 12) Then you'll have to manually download the distribution tar.gz for Proc::ProcessTable and edit os/Linux.h so that LENGTH_PCTCPU is set to 12 instead of 10. Then follow its README to compile and install.
- Some installs of Perl 5.8.8 can have trouble with Class::Accessor::Grouped (a
prerequisite of DBIx::Class), where some tests fail due to desired error
messages not looking quite right. This should be harmless in reality, so just
force install it:
cpan> force install Class::Accessor::Grouped
and then try the DBIx::Class installation again normally.
- Time::Format may fail some tests with errors mentioning problems with
Date::Manip. As long as you actually have Date::Manip installed, these
failures are probably fine and you can force the install:
cpan> force install Time::Format
- Redis may fail one its tests due to an error message not being in the
expected format. This is safe to ignore:
cpan> force install Redis
- If all the prerequisites seem to be installed but running 'perl Build.PL'
gives you an error message mentioning problems with any kind of Moose module,
one possibility is that you have a mixture of some new Moose modules and old
ones. You can solve this by updating all your Moose-related modules to their
latest versions. Eg. if you have cpanm installed, try:
cpanm Class::MOP Fey Fey::ORM MooseX::Aliases MooseX::ClassAttribute MooseX::LazyRequire MooseX::Method::Signatures MooseX::NonMoose MooseX::POE MooseX::Role::Cmd MooseX::Role::Parameterized MooseX::SemiAffordanceAccessor MooseX::Singleton MooseX::StrictConstructor
- If you get as far as running
./Build test(see below), and find some tests failing with an error message that mentions IO::Uncompress::Gunzip, try installing the latest version of that:
cpan> install IO::Uncompress::Gunzip
Once the prerequisites are installed you will be asked a number of setup questions such as the details of your production and testing databases. It is recommended to use a stand-alone relational database such as MySQL. If you're only using code such as a parser or the bas function, or only running pipelines on very small datasets, you can use SQLite, supplying a file path for the database name. However SQLite is not recommended for production use.
Note that when using MySQL, the server should be configured to allow at least 1/3 as many connections as you have CPUs in your cluster. It must also allow the transaction isolation level to be changed from a default of REPEATABLE-READ to READ-COMMITTED, and gap-locks must be possible (innodb_locks_unsafe_for_binlog must be off). In practice this means that if you have database replication set up, you may find that you have to reconfigure the server to binlog-mode=MIXED and restart/redo your replication server. To avoid possible issues we recommend MySQL 5.5 with the following settings in my.cnf, where the idea is to maximise transaction concurrency and performance:
- max_connections = 1000
- innodb_log_files_in_group = 2
- innodb_file_per_table = 1
- innodb_buffer_pool_size = 1G
- innodb_log_buffer_size = 32M
- transaction_isolation = REPEATABLE-READ
- innodb_locks_unsafe_for_binlog = 0
The SGE (Sun|Oracle GridEngine) scheduler has only been tested with SGE 8.1.3
from: https://arc.liv.ac.uk/trac/SGE. If tests get stuck and nothing happens
with no obvious error messages, try running:
perl -Imodules -It scripts/vrpipe-server --deployment testing --farm testing_farm -f --debug start
which should provide an error message. You may then have to alter or subclass VRPipe::Schedulers::sge; bug reports or patches welcome.
Once setup is complete modules/VRPipe/SiteConfig.pm will have been created. It is this file that holds your site-wide configuration of VRPipe.
To test the code prior to using it:
(Note that there is currently an issue where the first time you ever run tests they will fail because the test database wasn't created yet; start the tests running until you get past the DataSource.t test, then ctrl-c to kill the tests, then start them again: they should now work)
A number of environment variables affect which tests run and how. In most cases it is fine to not worry about these extra variables. They are described here for the sake of completeness.
- VRPIPE_TEST_PIPELINES, when true, will fully test all the pipelines and steps
instead of just the core functionality of the system.
These tests take a very long time - potentially hours -
so this is off by default. If you're interested in
running a particular pipeline, you can test just that
pipeline by setting this variable to true and then
./Build test --test_files t/VRPipe/Pipelines/[name].t --verbose
- GATK, pointing to a directory containing GATK jar files, will enable tests that require GATK
- GATK2, pointing to a directory containing GATK version 2+ jar files, will enable tests that require GATK version 2 or higher
- PICARD, pointing to a directory containing Picard jar files, will enable tests that require Picard
- CRAMTOOLS, pointing to a directory containing Cramtools jar files, will enable tests that require Cramtools
- TRIMMOMATIC_JAR_PATH, pointing to the timmomatic .jar file, will enable tests that require Trimmomatic
- CONVEX_R_LIB, pointing to a directory containing your R lib files, will enable tests of Convex
- VRPIPE_VRTRACK_TESTDB will enable testing of the VRTrack DataSource, using the value supplied as the database name (other database details will come from the standard VRTrack environment variables)
Additionally, tests that require certain executables will not run unless you have those executables in your PATH.
If you don't have root access, provide relevant options to ./Build install or use local::lib; in the latter case VRPipe would get installed in the directory that your PERL_LOCAL_LIB_ROOT points to, and you should include $PERL_LOCAL_LIB_ROOT/bin in your $PATH and $PERL_LOCAL_LIB_ROOT/lib/perl5 in your $PERL5LIB.
To create your production database (testing database is created automatically):
If in the future the VRPipe code is updated and there is a change to the schema,
you will need to stop VRPipe, update your code, then run:
Ensure that vrpipe-server is always running on a machine that can submit jobs
to your job scheduler (it must also be able to ssh to all other machines without
a password), and that has at least 2GB of free memory (which probably means the
machine must have at least 3GB physical memory), especially if using the local
vrpipe-server --farm my_farm start
Now you can use
vrpipe-create_pipeline to create
pipelines if necessary. Then end-users can set up a pipeline using
vrpipe-setup and vrpipe-status will be the most commonly used scripts. The web
front-end is currently limited to providing status, but it does so a bit nicer
and a bit faster than vrpipe-status cmd line tool. You can alter what it
displays by manually appending vrpipe-status arguments to the url, eg.
Access to output files can be achieved with
vrpipe-output. When you have an
output file but can't remember how it was made, use
Each vrpipe-* script has a --help option, eg:
As a general point, any Perl script you write that wants to use some VRPipe
code should typically "use VRPipe;". After that most things should work without
further "use" statements. To choose the deployment you can "import" the one you
want. eg. to work with your testing database:
use VRPipe 'testing';
or on the command-line:
perl -MVRPipe=testing -e '...'
When Things Go Wrong
For normal errors caused by failing jobs in a pipeline, and for most other issues, you should receive an email that either specifies the problem, or asks you to investigate (and fix) with vrpipe-submissions. Using vrpipe-status will also point out issues in case you're not receiving emails.
In the rare event that vrpipe-status and vrpipe-submissions do not reveal the problem, you can investigate further by looking at the logs. vrpipe-server keeps a log file in the logging directory you configured during installation (when you ran 'perl Build.PL'). For problems with a particular setup, use vrpipe-logs to see what has been happening with it.
Sometimes it can happen that a step is failing because the output of a previous step is corrupt. VRPipe will only ever automatically keeps retrying the current step, so it will keep failing. vrpipe-submissions only gives you an easy way to force the reattempt of a failed submission (ie. which will be for the current step), so it isn't helpful either. In this case you should use vrpipe-elements, which provides an easy way to 'go back' and reset steps that VRPipe thought completed successfully. Just be careful not to redo any step that outputs files that might be used by other running jobs in your setup, or by other setups.
Some software need environment variables setup (using setenv in csh or export in bash). The following list shows the name of the software, the environment variable you need to set, and the value you should set it to, separated by commas.
eg. to have cramtools work properly in the pipelines you might do:
setenv CRAMTOOLS /path/to/cramtools_jar_files
depending on what shell you are using.
These values are used internally and are independent of values you might set when asked for eg. the path to your cramtools jars when running vrpipe-setup.
A number of other environment variables are used to setup default values for when running vrpipe-setup, but are not required to use the software (ie. you can just manually enter the required path each time you setup the pipeline):
COPYRIGHT & LICENSE
Copyright (c) 2011-2015 Genome Research Limited.
This file is part of VRPipe.
VRPipe is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.
The usage of a range of years within a copyright statement contained within this distribution should be interpreted as being equivalent to a list of years including the first and last year specified and all consecutive years between them. For example, a copyright statement that reads 'Copyright (c) 2005, 2007- 2009, 2011-2012' should be interpreted as being identical to a statement that reads 'Copyright (c) 2005, 2007, 2008, 2009, 2011, 2012' and a copyright statement that reads "Copyright (c) 2005-2012' should be interpreted as being identical to a statement that reads 'Copyright (c) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012'."