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Oban is published on Hex. Add it to your list of dependencies in mix.exs:

def deps do
  [
    {:oban, "~> 2.11"}
  ]
end

Then run mix deps.get to install Oban and its dependencies, including Ecto, Jason and Postgrex.

After the packages are installed you must create a database migration to add the oban_jobs table to your database:

mix ecto.gen.migration add_oban_jobs_table

Open the generated migration in your editor and call the up and down functions on Oban.Migrations:

defmodule MyApp.Repo.Migrations.AddObanJobsTable do
  use Ecto.Migration

  def up do
    Oban.Migrations.up()
  end

  # We specify `version: 1` in `down`, ensuring that we'll roll all the way back down if
  # necessary, regardless of which version we've migrated `up` to.
  def down do
    Oban.Migrations.down(version: 1)
  end
end

This will run all of Oban's versioned migrations for your database. Migrations between versions are idempotent and will never change after a release. As new versions are released you may need to run additional migrations.

Now, run the migration to create the table:

mix ecto.migrate

Next see Usage for how to integrate Oban into your application and start defining jobs!