Redis(ioredis) health checks module for Nest framework (node.js).
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Table of Contents
- Both redis & cluster are supported.
- Health: Checks health of redis & cluster server.
- Rigorously tested: With 20+ tests and 100% code coverage.
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This lib requires Node.js >=12.22.0, NestJS ^9.0.0, ioredis ^5.0.0.
# with npm
npm install @nestjs/terminus @songkeys/nestjs-redis-health ioredis
# with yarn
yarn add @nestjs/terminus @songkeys/nestjs-redis-health ioredis
# with pnpm
pnpm add @nestjs/terminus @songkeys/nestjs-redis-health ioredis
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 '@songkeys/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 '@songkeys/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
andRedisHealthModule
are not global modules.
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 . |
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. |
Distributed under the MIT License. See LICENSE
for more information.