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Document that a registry is required for k3s usage #6799

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Apr 5, 2024
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Document that a registry is required for k3s usage #6799

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9 changes: 6 additions & 3 deletions docs/deployment/schedulers/k3s.md
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Expand Up @@ -35,6 +35,9 @@ dokku scheduler:set node-js-app k3s

## Usage

> [!IMPORTANT]
> The k3s plugin requires usage of a docker registry to store deployed image artifacts. See the [registry documentation](/docs/advanced-usage/registry-management.md) for more details on how to configure a registry.

### Initializing a cluster

> [!WARNING]
Expand Down Expand Up @@ -289,7 +292,7 @@ Dokku injects certain annotations into each created resource by default, but it
dokku scheduler-k3s:annotations:set node-js-app annotation.key annotation.value --resource-type deployment
```

If not specified, the annotation will be applied to all processes within an app, though it may be further scoped to a specific process type via the `--process-type` flag.
If not specified, the annotation will be applied to all processes within an app, though it may be further scoped to a specific process type via the `--process-type` flag.

```shell
dokku scheduler-k3s:annotations:set node-js-app annotation.key annotation.value --resource-type deployment --process-type web
Expand Down Expand Up @@ -326,7 +329,7 @@ Dokku injects certain labels into each created resource by default, but it may b
dokku scheduler-k3s:labels:set node-js-app label.key label.value --resource-type deployment
```

If not specified, the label will be applied to all processes within an app, though it may be further scoped to a specific process type via the `--process-type` flag.
If not specified, the label will be applied to all processes within an app, though it may be further scoped to a specific process type via the `--process-type` flag.

```shell
dokku scheduler-k3s:labels:set node-js-app label.key label.value --resource-type deployment --process-type web
Expand Down Expand Up @@ -409,7 +412,7 @@ Each value in the `metadata` stanza can use the following interpolated strings:

Most Keda triggers require some form of authentication to query for data. In the Kubernetes API, they are represented by `TriggerAuthentication` and `ClusterTriggerAuthentication` resources. Dokku can manage these via the `scheduler-k3s:autoscaling-auth` commands, and includes generated resources with each helm release generated by a deploy.

If no app-specific authentication is provided for a given trigger type, Dokku will fallback to any globally defined `ClusterTriggerAuthentication` resources. Autoscaling triggers within an app all share the same `TriggerAuthentication` resources, while `ClusterTriggerAuthentication` resources can be shared across all apps deployed by Dokku within a given cluster.
If no app-specific authentication is provided for a given trigger type, Dokku will fallback to any globally defined `ClusterTriggerAuthentication` resources. Autoscaling triggers within an app all share the same `TriggerAuthentication` resources, while `ClusterTriggerAuthentication` resources can be shared across all apps deployed by Dokku within a given cluster.

##### Creating Authentication Resources

Expand Down