ebloc-broker

eBlocBroker is a smart contract as an autonomous volunteer computing and sharing data resource broker based on blockchain for e-Science. It applies blockchain technology to provide a market for computational and data resources to research communities.

Prerequisites

• Slurm, IPFS, eth-brownie, owncloud/pyocclient, prasmussen/gdrive, ganache-cli.

Using Docker

You can use a sandbox container provided in the ./docker-compose.yml file for testing inside a Docker environment.

This container provides everything you need to test using a Python 3.7 interpreter. Start the test environment:

docker-compose up -d

To enter the shell of the running container in the interactive mode, run:

docker exec --detach-keys="ctrl-e,e" -it ebloc-broker_slurm_1 /bin/bash

To stop the container, run:

docker-compose down

Cloud Storages

B2DROP

Create B2ACCESS user account and login into B2DROP:

First, from B2ACCESS home page

No account SignUp => Create B2ACCESS user account (username) only

• B2DROP login site

Create app password

Settings => Security => Create new app password and save it onto ~~/.ebloc-broker/.b2drop_client.txt~ file.

How to install required packages

We have a helper script, which you can use to install all required external dependencies:

source ./scripts/setup.sh

Next, type eblocbroker --help for basic usage information.

Requester

Submit Job

In order to submit your job each user should already registered into eBlocBroker using eblocbroker register_provider ~/.ebloc-broker/cfg.yaml

After registration is done, each user should authenticate their ORCID iD using the following http://ebloc-broker-authenticate.duckdns.org/index.php using Brave browser along with MetaMask.

$ eblocbroker submit job.yaml

Example yaml file in order to define a job to submit.

job.yaml :

config:
  requester_address: '0x378181ce7b07e8dd749c6f42772574441b20e35f'
  provider_address: '0x29e613b04125c16db3f3613563bfdd0ba24cb629'
  source_code:
    storage_id: ipfs
    cache_type: public
    path: ~/test_eblocbroker/run_cppr
    storage_hours: 0
  data:
    data1:
      hash: 4613abc322e8f2fdeae9a5dd10f17540
    data2:
      hash: 050e6cc8dd7e889bf7874689f1e1ead6
    data3:
      cache_type: public
      path: /home/alper/test_eblocbroker/small/BVZ-venus
      storage_hours: 1
      storage_id: ipfs
  data_transfer_out: 10
  jobs:
    job0:
      cores: 1
      run_time: 60

• path should represented as full path of the corresponding folder.
• cache_type should be variable from [ public, private ]
• storage_id should be variable from [ ipfs, ipfs_gpg, none, b2drop, gdrive ]

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Provider

Each provider should run eblocbroker driver for start running the Python script.

Example screenshot of provider GUI:

🎬 Demonstration

• https://asciinema.org/a/551809
• https://asciinema.org/a/551843

Acknowledgement

This work is supported by the Turkish Directorate of Strategy and Budget under the TAM Project number 2007K12-873.

Developed by Alper Alimoglu and Can Ozturan from Bogazici University, Istanbul. Contact [email protected], [email protected] if necessary.