Mounting Dashboards


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

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"

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"


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:

  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

Then specify MyApp.Resolver as your resolver:

scope "/" do
  pipe_through :browser

  oban_dashboard "/oban", resolver: MyApp.Resolver

See Customizing the Dashboard for details on the Resolver behaviour.