View Source Upgrading to v2.11
This Oban release includes a required migration and a couple of optional, but recommended, changes.
Bump Your Deps
Update Oban, Web, and Pro to the latest versions:
[
{:oban, "~> 2.11"},
{:oban_pro, "~> 0.10", repo: "oban"},
{:oban_web, "~> 2.9", repo: "oban"}
]
Run Oban.Migrations for v11
Oban's new leadership mechanism uses an unlogged table to track state globally.
The v11 migration creates a new oban_peers
table, and is required for
leadership—without it many plugins won't run.
To get started, create a migration to create the table:
$ mix ecto.gen.migration create_oban_peers
Within the generated migration module:
use Ecto.Migration
def up, do: Oban.Migrations.up(version: 11)
def down, do: Oban.Migrations.down(version: 11)
If you have multiple Oban instances or use an alternate prefix you'll need to run the migration for each prefix.
The Oban.Peer
module will safely handle a missing oban_peers
table and log a
warning.
Update Notifier Names
Now that we've pulled the PG
notifier in from Oban Pro there are a few
naming changes you should make.
- If your config explicitly declares
Oban.PostgresNotifier
, change it to the new namespaced version:Oban.Notifiers.Postgres
:
-notifier: Oban.PostgresNotifier
+notifier: Oban.Notifiers.Postgres
- If you are using Pro's
PG
notifier, change it to the new namespaced version from Oban:
-notifier: Oban.Pro.Notifiers.PG
+notifier: Oban.Notifiers.PG
Check Configuration for Multi-Node Setups
This release introduces centralized leadership through the Oban.Peer
behaviour. To prevent duplicate plugin work across nodes, only one Oban instance
within a cluster may be the leader. Unfortunately, if a node that doesn't run
plugins becomes the leader then jobs may get stuck as available
and plugins
like Cron
or Pruner
won't run.
The simplest solution is avoid plugins: false
altogether:
-plugins: false
+plugins: []
See the Troubleshooting guide for more context.
Swap the Compound Index (Optional, but Recommended)
Oban uses a single compound index for most queries. The index is comprised of
job state
, queue
, priority
, scheduled_at
, and id
. That single index is
flexible enough to power most of Oban's queries. However, the column order is
important, and the order created by Oban's migrations isn't optimal in all
situations.
If you're experiencing slow plugin queries, e.g. the Stager
, then you may
benefit from swapping the indexes. To do so, create a migration:
$ mix ecto.gen.migration swap_primary_oban_indexes
Within the generated migration module:
@disable_ddl_transaction true
@disable_migration_lock true
def change do
create_if_not_exists index(
:oban_jobs,
[:state, :queue, :priority, :scheduled_at, :id],
concurrently: true,
prefix: "public"
)
drop_if_exists index(
:oban_jobs,
[:queue, :state, :priority, :scheduled_at, :id],
concurrently: true,
prefix: "public"
)
end
Be sure to reference the correct prefix if your oban_jobs
table uses a prefix
other than public
.