Advanced Training:

Compute to Data

Advanced Training:

Compute to Data

Alan King

Senior Software Developer

iRODS Consortium

July 5-8, 2022

iRODS User Group Meeting 2022

Leuven, Belgium

The Compute to Data Use Case

Data is assumed to already be routed to an appropriate storage resource

Goals - Develop generic interface concept for compute

• Develop a metadata driven interface for labeling resources which provide computational capabilities
  • ultimately relies upon convention
• Separate configuration from implementation
  • isolate deployment specific concepts
• Consider a rule base as an extension of iRODS
  • rules are not just data management policy

"Compute To Data" Pattern - Salient Features

Implemented as an iRODS rulebase -

    following the Template Method pattern

1. If necessary, replicate input data to an appropriate resource
2. Check permissions
3. Launch compute container (Docker) :
   1. Process input data via Jupyter notebook
   2.  Save results
4. Register the resultant directory into iRODS
5. Apply metadata to newly registered results

Components of the System

System Component

Job Initialization

Container Technology

User Provided Compute

Implementation

iRODS Rule Base

Docker

Jupyter Notebook

Getting Started

git clone https://github.com/irods/irods_training
sudo apt-get -y install \
   irods-externals-cmake3.21.4-0 \
   irods-externals-clang13.0.0-0 \
   irods-externals-qpid-proton0.36.0-0 \
   irods-externals-fmt8.1.1-0 \
   irods-dev
export PATH=/opt/irods-externals/cmake3.21.4-0/bin:$PATH

Clone irods_training repository and configure build tools

If necessary:

Getting Started - Python extensions to iRODS

 sudo apt-get -y install python3-pip 

Also, install python's pip package:

Make sure the Python rule engine plugin is installed.

 sudo apt-get -y install irods-rule-engine-plugin-python

 python3 -m pip install docker --user

As service account user irods, install the Python Docker API

Add irods user to the docker group:

(You might have to restart  the irods server)

      $ sudo service irods restart

or:   $ sudo su irods -c '~/irodsctl restart'

 sudo usermod -aG docker irods 

Changed python-pip to python3-pip.

Is that what we want? It's highlighted in red.

Further Setup and Configuration

Place Python Rule Engine stanza after irods_rule_engine_plugin stanza:

Create /etc/irods/core.py with the following  import:

try: import _pysym
except SystemError: pass
from compute_to_data import * 

"rule_engines": [
    {
      "instance_name": "irods_rule_engine_plugin-irods_rule_language-instance",
      "plugin_name": "irods_rule_engine_plugin-irods_rule_language",
                 ...
      "shared_memory_instance": "irods_rule_language_rule_engine"
    },
    {
      "instance_name": "irods_rule_engine_plugin-python-instance",
      "plugin_name": "irods_rule_engine_plugin-python",
      "plugin_specific_configuration": {}
    },

                 ...

Continued... Data-to-Compute Set-up / Configuration

iadmin mkuser alice rodsuser 
iadmin moduser alice password apass 

This demonstration will be run as rodsuser 'alice'

Configure the Tagged Resources - if necessary

Make two unixfilesystem resources

iadmin mkresc lts_resc unixfilesystem `hostname`:/tmp/irods/lts_resc
iadmin mkresc dsp_resc unixfilesystem `hostname`:/tmp/irods/dsp_resc

Annotate them with appropriate metadata given their roles

  - defined in the configuration as part of the contract

As the irods service account

imeta add -R lts_resc COMPUTE_RESOURCE_ROLE LONG_TERM_STORAGE
imeta add -R dsp_resc COMPUTE_RESOURCE_ROLE SIGNAL_PROCESSING

Finally ...

ubuntu$ iinit
 ERROR: environment_properties::capture: missing environment file. should be at [/home/ubuntu/.irods/irods_environment.json]
One or more fields in your iRODS environment file (irods_environment.json) are
missing; please enter them.
Enter the host name (DNS) of the server to connect to: localhost
Enter the port number: 1247
Enter your irods user name: alice
Enter your irods zone: tempZone
Those values will be added to your environment file (for use by
other iCommands) if the login succeeds.

Enter your current iRODS password:

ubuntu$ ils

/tempZone/home/alice:

ubuntu$

Remember to log in as 'alice' in the ubuntu training account:

The configuration interface

Define interfaces for any necessary conventions

• Metadata attributes and values
• Metadata values for implemented roles

Single Point of Truth - Template Method Pattern

• execute defined preconditions
• run user's requested container

Users may utilize metadata conventions within a rule to provide inputs to the generalized container service.

Reminder ...

Implemented as an iRODS rulebase -

    following the Template Method pattern

1. If necessary, replicate input data to an appropriate resource
2. Check permissions
3. Launch compute container (Docker) :
   1. Process input data via Jupyter notebook
   2.  Save results
4. Register the resultant directory into iRODS
5. Apply metadata to newly registered results (but not today...)

Separation of Concerns

iRODS Rule
     -> Python Rule
          -> Docker Container
               -> Jupyter Notebook

The iRODS Rule Language Rule File

main {
  container_dispatch("containers.run","/tempZone/home/alice/task_config.json","dsp_resc","","")
}
INPUT null
OUTPUT ruleExecOut

Note - add a delay() directive for asynchronous behavior.

Contents of /home/ubuntu/spawn_remote_containers.r

The Python Rulebase

Located at:

/home/ubuntu/irods_training/advanced/hpc_compute_to_data/compute_to_data.py

The Digital Signal Processing container

FROM jupyter/base-notebook
ARG  irods_gid=999
ENV  IRODS_GID ${irods_gid}
USER root
RUN apt-get update && apt-get install -y vim less
RUN groupadd -g $IRODS_GID irods && usermod -aG irods jovyan
RUN sed -i "s/jovyan:x:[0-9]*:[0-9]*\(.*\)/jovyan:x:999:999\1/" /etc/passwd
ADD lpfilter.ipynb /home/jovyan/work/.
COPY mymodule/ /home/jovyan/work/mymodule/
RUN chown jovyan.users /home/jovyan/work/lpfilter.ipynb
COPY mymodule/ /home/jovyan/work/mymodule
RUN chown -R jovyan.users /home/jovyan/work/mymodule
RUN chown -R 999:999 /home/jovyan && chown -R 999:999 /opt/conda
USER jovyan
RUN conda init
RUN conda install -y -c conda-forge matplotlib numpy
RUN jupyter trust /home/jovyan/work/lpfilter.ipynb
CMD [ '/bin/bash' ]

The Jupyter Notebook

Located at:

/home/ubuntu/irods_training/advanced/hpc_compute_to_data/jupyter_notebook/lpfilter.ipynb

The notebook:

  - loads an input waveform

  - applies a digital lowpass filter

  - plots 3 graphs of the results

  - saves graphs and filtered data

Compute to Data - Digital Filter Testing

ubuntu $ icd ; imkdir notebook_input notebook_output
ubuntu $ cd ; iput task_config.json
ubuntu $ for x in {1..512}; do echo $((x%24)) ; done >input.dat
ubuntu $ iput input.dat notebook_input
ubuntu $ ils -lr
/tempZone/home/alice:
 alice             0 demoResc          853 2022-06-21.16:05 & task_config.json
 C- /tempZone/home/alice/notebook_input
/tempZone/home/alice/notebook_input:
 alice             0 demoResc         1318 2022-06-21.16:05 & input.dat
 C- /tempZone/home/alice/notebook_output
/tempZone/home/alice/notebook_output:
ubuntu $ irule -r irods_rule_engine_plugin-irods_rule_language-instance -F spawn_remote_containers.r
ubuntu $ ils -lr
/tempZone/home/alice:
 alice             0 demoResc          853 2022-06-21.16:05 & task_config.json
 C- /tempZone/home/alice/notebook_input
/tempZone/home/alice/notebook_input:
 alice             0 demoResc         1318 2022-06-21.16:05 & input.dat
 alice             1 dsp_resc         1318 2022-06-21.16:06 & input.dat
 C- /tempZone/home/alice/notebook_output
/tempZone/home/alice/notebook_output:
 alice             0 dsp_resc            0 2022-06-21.16:06 & .8d63a286-943e-11e9-8013-12cc2f55e24c
 C- /tempZone/home/alice/notebook_output/8d63a286-943e-11e9-8013-12cc2f55e24c
/tempZone/home/alice/notebook_output/8d63a286-943e-11e9-8013-12cc2f55e24c:
 alice             0 dsp_resc            0 2022-06-21.16:06 & .8d63a286-943e-11e9-8013-12cc2f55e24c
 alice             0 dsp_resc         3200 2022-06-21.16:06 & lowpass_filtered_input.dat
 alice             0 dsp_resc       359430 2022-06-21.16:06 & lowpass_filter_processing.html

irule command results in an error (Operation not permitted).

There are python errors as well (undefined symbol: PyExc_OSError).

Seem related to Python 3 usage. Perhaps something in the python code needs a tweak.

Compute to Data - Digital Filter Results

sudo su - irods
cd /tmp/irods/dsp_resc/home/alice/notebook_output
python3 -m http.server 8080

Navigate to notebook_output

View the html file

Start a simple http server to view the output

Questions?