***

title: "HealthCheckRegistryService"
generated: true
---------------

<GenerationInfo sourceFile="packages/core/src/health-check/health-check-registry.service.ts" sourceLine="42" packageName="@vendure/core" />

This service is used to register health indicator functions to be included in the
health check. Health checks can be used by automated services such as Kubernetes
to determine the state of applications it is running. They are also useful for
administrators to get an overview of the health of all the parts of the
Vendure stack.

Plugins which rely on external services (web services, databases etc.) can make use of this
service to add a check for that dependency to the Vendure health check.

Since v1.6.0, the preferred way to implement a custom health check is by creating a new [HealthCheckStrategy](/current/core/reference/typescript-api/health-check/health-check-strategy#healthcheckstrategy)
and then passing it to the `systemOptions.healthChecks` array.
See the [HealthCheckStrategy](/current/core/reference/typescript-api/health-check/health-check-strategy#healthcheckstrategy) docs for an example configuration.

The alternative way to register a health check is by injecting this service directly into your
plugin module. To use it in your plugin, you'll need to import the [PluginCommonModule](/current/core/reference/typescript-api/plugin/plugin-common-module#plugincommonmodule):

*Example*

```ts
import { HealthCheckRegistryService, PluginCommonModule, VendurePlugin } from '@vendure/core';

@VendurePlugin({
  imports: [PluginCommonModule],
})
export class MyPlugin {
  constructor(private registry: HealthCheckRegistryService) {
    registry.registerIndicatorFunction(async () => ({
      'vendure-docs': { status: 'up' },
    }));
  }
}
```

```ts title="Signature"
class HealthCheckRegistryService {
    registerIndicatorFunction(fn: HealthIndicatorFunction | HealthIndicatorFunction[]) => ;
}
```

<div className="members-wrapper">

### registerIndicatorFunction

\<MemberInfo kind="method" type={`(fn: <a href='/current/core/reference/typescript-api/health-check/health-indicator-function#healthindicatorfunction'>HealthIndicatorFunction</a> | <a href='/current/core/reference/typescript-api/health-check/health-indicator-function#healthindicatorfunction'>HealthIndicatorFunction</a>[]) => `}   />

Registers one or more [HealthIndicatorFunction](/current/core/reference/typescript-api/health-check/health-indicator-function#healthindicatorfunction)s to be added to the
health check endpoint. The indicator will also appear in the Admin UI's
"system status" view.

</div>