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Operating Documentation

This document explains how Quepid can be operated and configured.

Running behind a load balancer

⚠️ Quepid will run in TLS (https) or plain http mode depending on the protocol of the target search engine. Requests to the search engine are issued by the client. Most browsers deny plain http requests (to the search engine) originating from a TLS secured Quepid.

(1) To run behind a TLS secured load balancer, acquire a valid TLS certificate from e.g. Let's Encrypt or create a self-signed certificate:

# create self-signed certificate
$ openssl req -x509 -nodes -days 365 -newkey rsa:2048 \
    -subj "localhost" \
    -keyout /etc/ssl/certs/quepid.key \
    -out /etc/ssl/certs/quepid.crt

# join private key and certificate into PEM format
$ cat /etc/ssl/certs/quepid.crt /etc/ssl/certs/quepid.key \
    > /etc/ssl/certs/quepid.pem

(2) Configure your favorite load balancer (or reverse proxy), in this case Nginx

server {
    listen              80;
    listen              443 ssl;
    ssl_certificate     /etc/ssl/certs/quepid.pem;
    ssl_certificate_key /etc/ssl/certs/quepid.pem;
    ssl_protocols       TLSv1.2;
    ssl_ciphers         HIGH:!aNULL:!MD5;
    access_log off;

    location / {
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        proxy_set_header X-Forwarded-Host $host;
        proxy_pass http://localhost:3000/;
    }
}

(3) Configure Quepid with the domain visible to the user.

QUEPID_DOMAIN=https://localhost  # Set this to the domain visible to the user
FORCE_SSL=true                   # Enable this to use https only connections

⚠️ Setting FORCE_SSL=true will prevent you from testing search engines that are not TLS enabled (https)!

Setting up a Context Path

If you wish to host Quepid in a folder other than the root folder (/), specify the RAILS_RELATIVE_URL_ROOT env var.

Note 1: The context path should not have a trailing-slash. If you do not wish to setup a context path you can leave this variable blank.

Note 2: The precompiled assets also need to know about the RAILS_RELATIVE_URL_ROOT in the production docker image. Add to your entrypoint.sh the instruction RAILS_ENV=production bundle exec rake assets:precompile RAILS_RELATIVE_URL_ROOT=/quepid-app to redo the image.

Mail

Quepid has to send E-Mails for several reasons, for example for the password reset function or to invite a new user. Therefore Quepid has two options to use:

The behavior which option should used, can be controlled by the following ENV var:

EMAIL_PROVIDER  # set to "smtp" to use SMTP, "postmark" to use Postmark, or blank to disable sending emails.

Set the from email address via the following ENV var:

EMAIL_SENDER                 # The from email address.  i.e [email protected]

Postmark

If you want to use Postmark as your mail delivery service, you have to set the EMAIL_PROVIDER to postmark and you have to tell Quepid your Server API Token. This can be done by setting the following ENV var:

POSTMARK_API_TOKEN=XXXXXXXXXXXX  # Your Postmark Server API Token

SMTP

If you want to use STMP for sending mails, you have to set the EMAIL_PROVIDER to smtp and set the following ENV vars to describe the connection to the smtp sever:

SMTP_HOST                    # smtp server to use for sending
SMTP_PORT                    # smtp port to use for connection
MAIL_DOMAIN                  # If you need to specify a HELO domain, you can do set it here
SMTP_USERNAME                # If your mail server requires authentication, set the username in this setting
SMTP_PASSWORD                # If your mail server requires authentication, set the password in this setting
SMTP_AUTHENTICATION_TYPE     # If your mail server requires authentication, you need to specify the authentication type here (plain, login, cram_md5)
SMTP_ENABLE_STARTTLS         # If STARTTLS is enabled in your server set to true

OAuth

Quepid uses OmniAuth for authenticating users against other resources besides it's own email/password database. OmniAuth provides an easy way to authenticate against dozens of outside services. The only ones that are packaged with Quepid are Google and Keycloak, but it's fairly easy to add new ones.

Learn more about setting up Google oAuth at https://support.google.com/cloud/answer/6158849?hl=en.

The built in options are GOOGLE_CLIENT_ID, GOOGLE_CLIENT_SECRET, KEYCLOAK_REALM and KEYCLOAK_SITE.

The OmniAuth providers are defined in config/initializers/devise.rb. A list of available providers can be viewed on the OmniAuth Wiki. To enable a provider you need to add the gem (eg. omniauth-facebook) to the Gemfile and configure in devise.rb and user.rb

The existence of GOOGLE_CLIENT_ID or KEYCLOAK_REALM enables the respective sign in option.

Keycloak Setup Details

Quepid has a basic Keycloak config file in /keycloak/realm-config/quepid-realm.json that is used for development purposes.

We have a Realm called Quepid, and it includes a Client called quepid. The client is where the specific configuration for how Quepid interacts with Keycloak via oAuth is set up.

We assume that the client definition in Keycloak will be named quepid, you can't change that. You can pick your Realm name however.

Keycloak 17+ removes the /auth portion of the url. If you are using earlier versions of keycloak, you need to set base_url:'/auth' in devise.rb.

Legal Pages & GDPR

If you would like to have legal pages linked in the footer of the app, similar to behavior on http://app.quepid.com, add the following ENV vars:

TC_URL      # terms and condition
PRIVACY_URL # privacy policy
COOKIES_URL # cookies policy

To comply with GDPR, and be a good citizen, the hosted version of Quepid asks if they are willing to receive Quepid related updates via email. This feature isn't useful to private installs, so this controls the display.

EMAIL_MARKETING_MODE=true   # Enables a checkbox on user signup to consent to emails

User Tracking

We currently only support Google Analytics, and you enable it by setting the following ENV var:

QUEPID_GA=XXXXXXXXXXXX  # Your Google Analytics Key

You will need Redis to support sending events to GA. In production, uncomment the Redis configuration in docker-compose.yml to set up a local Redis. Also uncomment the worker in the file Procfile

Healthcheck

Want to monitor if Quepid is behaving? Just monitor /healthcheck, and you will get 200 status codes from a healthy Quepid, and 503 if not. The JSON output is {"code":200,"status":{"database":"OK","migrations":"OK"}}.

Analytics Settings

We use the Prophet.rb library to decide when interesting things happen in our case scores on the homepage. This library may use too much memory for your deploy, and can be disabled.

You can disable this behavior by setting the follow ENV var:

QUEPID_PROPHET_ANALYTICS=false

Troubleshoot Your Deploy

When errors occur, Quepid logs them and shows a generic page.
However sometimes getting to those logs is difficult, and you just want the message immediately.

You can enable this behavior by setting the follow ENV var:

QUEPID_CONSIDER_ALL_REQUESTS_LOCAL=true

Confirm the setup by visiting /api/test_exception which raises an error and will give you the debugging page "RuntimeError in Api::ApiController#test_exception".

Database Management

See the details in .

Jupuyterlite Notebooks

See the details in .

Using Personal Access Tokens

Accessing the Quepid API like http://localhost:3000/api/cases/5.json is protected by you logging in and having the appropriate cookies set. But what if we want to have an automated process? Then you need to create a Personal Access Token. Using that, you can then do a curl request like:

curl -X GET -H 'Authorization: Bearer 53e41835979d649775243ababd4312e8' http://localhost:3000/api/cases/5.json
>> {"name":"Book of Ratings","book_id":1,"query_doc_pairs":[{"query_doc_pair_id":1,"position":1,"query":"adsf","doc_id":"asdf","judgements":[]}]}%

Here is an example of creating a query doc pair:

curl -X POST http://localhost:3000/api/books/2/query_doc_pairs/ -H 'Authorization: Bearer 4a82040bf1b2d255c63833cb59fa9275' -H 'Content-Type: application/json' -d '{
  "query_doc_pair": {
    "document_fields": "{title:My Document}",
    "query_text": "my search",
    "doc_id": "some_special_doc_id_52",
    "position": 1
  }
}'

curl -X POST http://localhost:3000/api/books/2/judgements/ -H 'Authorization: Bearer 4a82040bf1b2d255c63833cb59fa9275' -H 'Content-Type: application/json' -d '{
  "judgement": {
    "query_doc_pair_id": 201
    "rating": 1
  }
}'