About The Project

Features

• Both redis & cluster are supported.
• Health: Checks health of redis & cluster server.
• Rigorously tested: With 20+ tests and 100% code coverage.

Test coverage

| Statements | Branches | Functions | Lines | | --------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------- | | | | | |

Getting Started

Prerequisites

This lib requires Node.js >=12.22.0, NestJS ^9.0.0, ioredis ^5.0.0.

Installation

# with npm
npm install @nestjs/terminus @liaoliaots/nestjs-redis-health ioredis
# with yarn
yarn add @nestjs/terminus @liaoliaots/nestjs-redis-health ioredis
# with pnpm
pnpm add @nestjs/terminus @liaoliaots/nestjs-redis-health ioredis

Usage

1, import TerminusModule and RedisHealthModule into the imports array:

// app.module.ts
import { Module } from '@nestjs/common';
import { TerminusModule } from '@nestjs/terminus';
import { RedisHealthModule } from '@liaoliaots/nestjs-redis-health';
import { AppController } from './app.controller';

@Module({
  imports: [TerminusModule, RedisHealthModule],
  controllers: [AppController]
})
export class AppModule {}

2, let's setup AppController:

// app.controller.ts
import { Controller, Get } from '@nestjs/common';
import { HealthCheckService, HealthCheck, HealthCheckResult } from '@nestjs/terminus';
import { RedisHealthIndicator } from '@liaoliaots/nestjs-redis-health';
import Redis from 'ioredis';

@Controller()
export class AppController {
  private readonly redis: Redis;

  constructor(private readonly health: HealthCheckService, private readonly redisIndicator: RedisHealthIndicator) {
    this.redis = new Redis({ host: 'localhost', port: 6379, password: 'authpassword' });
  }

  @Get('health')
  @HealthCheck()
  async healthChecks(): Promise<HealthCheckResult> {
    return await this.health.check([
      () => this.redisIndicator.checkHealth('redis', { type: 'redis', client: this.redis, timeout: 500 })
    ]);
  }
}

3, if your redis server is reachable, you should now see the following JSON-result when requesting http://localhost:3000/health with a GET request:

{
  "status": "ok",
  "info": {
    "redis": {
      "status": "up"
    }
  },
  "error": {},
  "details": {
    "redis": {
      "status": "up"
    }
  }
}

INFO: Read more about @nestjs/terminus here.

HINT: Both TerminusModule and RedisHealthModule are not global modules.

Settings

Redis

| Name | Type | Default | Required | Description | | --------------- | --------- | ----------- | -------- | ----------------------------------------------------------------------------------------------------- | | type | 'redis' | undefined | true | Server type. You must specify what Redis server type you use. Possible values are "redis", "cluster". | | client | Redis | undefined | true | The client which the health check should get executed. | | timeout | number | 1000 | false | The amount of time the check should require in ms. | | memoryThreshold | number | undefined | false | The maximum amount of memory used by redis in bytes. |

Cluster

| Name | Type | Default | Required | Description | | ------ | ----------- | ----------- | -------- | ----------------------------------------------------------------------------------------------------- | | type | 'cluster' | undefined | true | Server type. You must specify what Redis server type you use. Possible values are "redis", "cluster". | | client | Cluster | undefined | true | The client which the health check should get executed. |

License

Distributed under the MIT License. See LICENSE for more information.