[Beowulf] Singularity 1.0 is out

Walid walid.shaari at gmail.com
Mon Apr 25 07:57:00 PDT 2016

Hi Jeff,

So can one build an app in Centos 6, and run it in Cray XC40? would it be
an alternative to shifter, and docker? I do not have access to Cray system
yet, however this would solve one issue for our app developers. i will go
read more about it

On 17 April 2016 at 16:53, Jeffrey Layton <laytonjb at gmail.com> wrote:

> I just wanted to pile in here a little bit. Singularity is great! I've
> tried to use containers before but I've found them to be something of a
> pain in the neck (probably it's just me). But Singularity is very simple to
> use even with MPI codes! I've run a few sort of "medium level" MPI codes
> without issues ("medium" means a single large node with 32GB of memory).
> I've tested out the cross-platform capability and found it to work well
> (there are a couple of gotchas - email the singularity list if you need
> help). I built a Singularity container (called a .sapp file) on a CentOS 6
> system and run it on a Linux Mint system without issues.
> I wrote an article for HPC Admin Magazine about it - it should appear this
> coming week sometime. It's a simple introduction article, but does include
> an example MPI code. I hope to write a couple of follow-on articles that
> explain a little more.
> Singularity is very easy to use and works really well. I highly recommend
> you try it out (it's not difficult to build or use). I'm going to start
> using it much more often.
> Thanks!
> Jeff
> On Fri, Apr 15, 2016 at 1:20 PM, Douglas Eadline <deadline at eadline.org>
> wrote:
>> This is a very cool project. From the announcement:
>> Singularity is a container platform built around the notion of "Mobility
>> of Compute". With Singularity you can build executable containers based on
>> your host system and define what happens when that container is launched.
>> Processes inside the container can be single binaries, or a complex of
>> binaries, scripts and data.
>> While there are several full featured container systems that already
>> exist, these container solutions are feature rich as they tend to emulate
>> a full hardware virtualization hypervisor. Because of many of these
>> features (e.g. user level contexts and ability to escalate to root)
>> implementation on large scale multi-user resources is difficult and maybe
>> impossible. This is what motivated the development of Singularity; a
>> lightweight, non-invasive and easily implementable container system that
>> supports existing workflows and focuses on application portability and
>> mobility.
>> In this release, you can expect the following support:
>> * Ability to create Singularity containers based on a package specfile
>> * Specfile templates can be generated automatically (singularity specgen
>> ...)
>> * Support for various automatic dependency resolution
>>    * Dynamic libraries
>>    * Perl scripts and modules
>>    * Python scripts and modules
>>    * R scripts and modules
>>    * Basic X11 support
>>    * Open MPI (v2.1 - which is not yet released)
>> * Direct execution of Singularity containers (e.g. ./container.sapp
>> [opts])
>> * Access to files in your home directory and a scratch directory
>> * Existing IO (pipes, stdio, stderr, and stdin) all maintained through
>> container
>> * Singularity internal container cache management
>> * Standard networking access (exactly as it does on the host)
>> * Singularity containers run within existing resource contexts (CGroups
>> and ulimits are maintained)
>> * Easily integrated into existing schedulers and batch scripts
>> * Support for scalable execution of MPI parallel jobs
>> * Singularity containers are portable between Linux distributions
>> You can download Singularity and obtain more information here:
>> http://gmkurtzer.github.io/singularity/
>> --
>> Doug
>> --
>> Mailscanner: Clean
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