Provides data exploration tools and views for Scalarm platform
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Scalarm Data Explorer

Data Explorer is a component of the Scalarm platform. This module is responsible for analysis and visualization of Farming Data experiments results.

To run the services you need to fulfil the following requirements:

Ruby version

Currently we use and test Scalarm against MRI 2.1.x but the Rubinius version of Ruby should be good as well.

Please install Ruby with RVM as described on

\curl -sSL | bash -s stable --ruby=2.1

Follow installation instructions and reload shell on the end if necessary.

System dependencies

  • R
  • MongoDB
  • any dependency required by native gems

Some requirements will be installed by rvm also during ruby installation.


You can download it directly from GitHub

git clone

After downloading the code you just need to install gem requirements:

cd scalarm_data_explorer
bundle install

if any dependency is missing you will be noticed :)


There are two files with configuration: config/secrets.yml and config/puma.rb.

The "secrets.yml" file is a standard configuration file added in Rails 4 to have a single place for all secrets in an application. We used this approach in our Scalarm platform. Data Explorer stores access data to Information Service in this file:

default: &DEFAULT
  ## cookies enctyption key - set the same in each ExperimentManager to allow cooperation
  secret_key_base: "<you need to change this - with $rake secret>"

  ## InformationService - a service locator
  information_service_url: "localhost:11300"
  information_service_user: "<set to custom name describing your Scalarm instance>"
  information_service_pass: "<generate strong password instead of this>"
  ## uncomment, if you want to communicate through HTTP with Scalarm Information Service
  # information_service_development: true

    ## By default all origins are allowed
    allow_all_origins: true

    ## If setting allow_all_origins to false, list all allowed origins below
      - 'https://localhost:3001'
      - 'http://localhost:3000'
      - 'https://localhost'

  ## Database configuration
  ## name of MongoDB database, it is scalarm_db by default
      db_name: 'scalarm_db'
      ## key for symmetric encryption of secret database data - please change it in production installations!
      ## NOTICE: this key should be set ONLY ONCE BEFORE first run - if you change or lost it, you will be UNABLE to read encrypted data!
      db_secret_key: "QjqjFK}7|Xw8DDMUP-O$yp"

  ## Uncomment, if you want to communicate through HTTP with Scalarm Storage Manager
  # storage_manager_development: true

  ## Configuration of optional Scalarm LoadBalancer (
      # if you installed and want to use scalarm custom load balancer set to false
      disable_registration: true
      # if you use load balancer you need to specify multicast address (to receive load balancer address)
      #multicast_address: ""
      # if you use load balancer on http you need to specify this
      #development: true
      # if you want to run and register service in load balancer on other port than default
      #port: "3000"

  <<: *DEFAULT

  ## In production environments some settings should not be stored in configuration file
  ## for security reasons.
  secret_key_base: <%= ENV["SECRET_KEY_BASE"] %>
  information_service_url: "<%= ENV["INFORMATION_SERVICE_URL"] %>"
  information_service_user: "<%= ENV["INFORMATION_SERVICE_LOGIN"] %>"
  information_service_pass: "<%= ENV["INFORMATION_SERVICE_PASSWORD"] %>"
    # share development db with production db by default
    db_name: 'scalarm_db'
    db_secret_key: "<%= ENV["DB_SECRET_KEY"] %>"

  <<: *DEFAULT

  <<: *DEFAULT

The example file is placed in config/secrets.yml.example and will be copied to config/secrets.yml if there is no configuration.

In the "config/puma.rb" configuration of the PUMA web server is stored:

environment 'production'

bind 'unix:/tmp/scalarm_data_explorer.sock'

stdout_redirect 'log/puma.log', 'log/puma.log.err', true
pidfile ''

threads 1,4     # 1-4 threads
# workers 2       # 2 processes

The example file is placed in config/puma.rb.example and will be copied to config/puma.rb if there is no configuration.

Please remember to set RAILS_ENV=production when running in the production mode.

export RAILS_ENV=production

To start/stop the service you can use the provided Rakefile:

rake service:start
rake service:stop

Before the first start (in the production mode) of the service you need to compile assets:

rake service:non_digested

With the configuration as above Data Explorer will be listening on linux socket. To make it available for other services we will use a HTTP server - nginx - which will also handle SSL.

To configure NGINX you basically need to add some information to NGINX configuration, e.g. in the /etc/nginx/conf.d/default.conf file.

# ================ SCALARM DATA EXPLORERS
upstream scalarm_data_explorer {
           server localhost:25001;
           server unix:/tmp/scalarm_data_explorer.sock;

server {
  listen 25000 ssl default_server;
  client_max_body_size 0;

  ssl_certificate server.crt;
  ssl_certificate_key server.key;

  #ssl_verify_client optional;
  #ssl_client_certificate /etc/grid-security/certificates/PolishGrid.pem;
  #ssl_verify_depth 5;
  ssl_session_timeout 30m;
  #crl list
  #ssl_crl /etc/grid-security/certificates/all.crl.pem;
  ssl_protocols TLSv1 TLSv1.1 TLSv1.2;

  location / {
      proxy_pass http://scalarm_data_explorer;

  proxy_set_header SSL_CLIENT_S_DN $ssl_client_s_dn;
  proxy_set_header SSL_CLIENT_I_DN $ssl_client_i_dn;
  proxy_set_header SSL_CLIENT_VERIFY $ssl_client_verify;
  proxy_set_header SSL_CLIENT_CERT $ssl_client_cert;
  proxy_set_header X-Real-IP  $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
  proxy_set_header Host $http_host;
  proxy_set_header X-Forwarded-Proto https; # New header for SSL


One last thing to do is to register Data Explorer in the Scalarm Information Service. With the presented configuration (and assuming we are working on a hypothetical IP address we just need to:

curl -k -u scalarm:scalarm --data "address=" https://localhost:11300/data_explorers