Oban
Oban v2.11.0

View Source Installation

Oban.Web is delivered as a hex package named oban_web, which is published privately to our self-hosted package repository. The package is entirely self contained—it doesn't hook into your asset pipeline at all.

Prerequisites

  1. Ensure Oban is installed for your application. It's probably there already, but just in case, follow these instructions to get started.

  2. Ensure Phoenix Live View is installed and working in your application. If you don't have Live View, follow these instructions to get started.

  3. Ensure you're running Erlang/OTP v23.3.4.5, v24.0.4, or later. Older Erlang/OTP versions have an expired CA root certificate that doesn't work with Let's Encrypt certificates.

  4. Ensure you're running hex v1.0.0 or later, via mix local.hex --force

Authentication

Before you can pull the package into your application you need to add a new oban hex repo. First, grab the OBAN_KEY_FINGERPRINT and OBAN_LICENSE_KEY from your account page.

Then, run the following mix hex.repo command:

mix hex.repo add oban https://getoban.pro/repo \
  --fetch-public-key $OBAN_KEY_FINGERPRINT \
  --auth-key $OBAN_LICENSE_KEY

⚠️ You'll also need to authenticate on any other development machines, build servers and CI instances. There are also guides to help with building Docker Images, authenticating on Gigalixir, and on Heroku.

Configuration

Now that you're authenticated you're ready to add oban_web as a dependency for your application. Open mix.exs and add the following line:

{:oban_web, "~> 2.9", repo: "oban"}

Now fetch your dependencies:

$ mix deps.get

This will fetch both oban_web and oban_pro, if you haven't already installed oban_pro.

The Gossip plugin and the Stats plugin are necessary for the dashboard to function properly. Add them to your Oban configuration in config.exs:

config :my_app, Oban,
  repo: MyApp.Repo,
  queues: [alpha: 10, gamma: 10, delta: 10],
  plugins: [
    Oban.Plugins.Gossip,
    Oban.Web.Plugins.Stats
  ]

After configuration you can mount the dashboard within your application's router.ex:

# lib/my_app_web/router.ex
use MyAppWeb, :router

import Oban.Web.Router

...

scope "/" do
  pipe_through :browser

  oban_dashboard "/oban"
end

Here we're using "/oban" as the mount point, but it can be anywhere you like. After you've verified that the dashboard is loading you'll probably want to restrict access to the dashboard via authentication, e.g. with Basic Auth.

Installation is complete and you're all set! Start your Phoenix server, point your browser to where you mounted Oban and start monitoring your jobs.

Advanced Configuration

Running Multiple Dashboards

Applications that run multiple Oban instances can mount a dashboard for each instance. Set the mounted dashboard's :oban_name to match the corresponding supervision tree's name. For example, given two configured Oban instances, Oban and MyAdmin.Oban:

config :my_app, Oban,
  repo: MyApp.Repo,
  name: Oban,
  ...

config :my_admin, Oban,
  repo: MyAdmin.Repo,
  name: MyAdmin.Oban,
  ...

You can then mount both dashboards in your router:

scope "/" do
  pipe_through :browser

  oban_dashboard "/oban", oban_name: Oban, as: :oban_dashboard
  oban_dashboard "/admin/oban", oban_name: MyAdmin.Oban, as: :oban_admin_dashboard
end

Note that the default name is Oban, setting oban_name: Oban in the example above was purely for demonstration purposes.

Customizing the Socket Connection

Applications that use a live socket other than "/live" can override the default socket path in the router. For example, if your live socket is hosted at /oban_live:

socket "/oban_live", Phoenix.LiveView.Socket

scope "/" do
  pipe_through :browser

  oban_dashboard "/oban", socket_path: "/oban_live"
end

If your application is hosted in an environment that doesn't support websockets you can use longpolling as an alternate transport. To start, make sure that your live socket is configured for longpolling:

socket "/live", Phoenix.LiveView.Socket,
  longpoll: [connect_info: [session: @session_options], log: false]

Then specify "longpoll" as your transport:

scope "/" do
  pipe_through :browser

  oban_dashboard "/oban", transport: "longpoll"
end

Content Security Policy

To secure the dashboard, or comply with an existing CSP within your application, you can specify nonce keys for images, scripts and styles.

You'll configure the CSP nonce assign key in your router, where the dashboard is mounted. For example, to use a single nonce for all three asset types:

oban_dashboard("/oban", csp_nonce_assign_key: :my_csp_nonce)

That instructs the dashboard to extract a generated nonce from the assigns map on the plug connection, at the :my_csp_nonce key.

Instead, you can specify different keys for each asset type:

oban_dashboard("/oban",
  csp_nonce_assign_key: %{
    img: :img_csp_nonce,
    style: :style_csp_nonce,
    script: :script_csp_nonce
  }
)

Note that using the CSP is entirely optional.

Customizing with a Resolver Callback Module

Implementing a Oban.Web.Resolver callback module allows you to customize the dashboard per-user, i.e. setting access controls or the default refresh rate.

As a simple example, let's define a module that makes the dashboard read only:

defmodule MyApp.Resolver do
  @behaviour Oban.Web.Resolver

  @impl true
  def resolve_access(_user), do: :read_only
end

Then specify MyApp.Resolver as your resolver:

scope "/" do
  pipe_through :browser

  oban_dashboard "/oban", resolver: MyApp.Resolver
end

See Customizing the Dashboard for details on the Resolver behaviour.

Integrating with Telemetry

Oban Web uses Telemetry to provide instrumentation and to power logging of dashboard activity. See the Telemetry guide for a breakdown of emitted events and how to use the default logger.

Trouble installing? Have questions?

Take a look at the troubleshooting guide to see if your issue is covered. If not, or if you need any help, stop by the #oban channel in Elixir Slack.