@tsed/terminus
    TypeScript icon, indicating that this package has built-in type declarations

    6.98.1 • Public • Published

    Ts.ED logo

    @tsed/terminus

    Build & Release PR Welcome Coverage Status npm version semantic-release code style: prettier backers

    Website   •   Getting started   •   Slack   •   Twitter

    Adds graceful shutdown and Kubernetes readiness / liveness checks for any HTTP applications.

    Installation

    Before using terminus, we need to install the terminus module.

    npm install --save @godaddy/terminus @tsed/terminus

    Then import @tsed/terminus and add the following configuration in your Server.ts:

    import {Configuration} from "@tsed/common";
    import "@tsed/terminus"; // import terminus Ts.ED module
    import {resolve} from "path";
    const rootDir = resolve(__dirname);
    
    @Configuration({
      rootDir,
      terminus: {
        // ... see Terminus configuration options on https://github.com/godaddy/terminus
      }
    })
    export class Server {}

    Options

    terminus configuration options waiting the same option description in the official Terminus documentation here. The following the options are managed by the @tsed/terminus package:

    • healthChecks
    • onSignal
    • onSendFailureDuringShutdown
    • onShutdown
    • beforeShutdown
    • onSigterm
    export type TerminusSettings = Omit<
    TerminusOptions,
    "healthChecks" | "onSignal" | "onSendFailureDuringShutdown" | "onShutdown" | "beforeShutdown" | "onSigterm"
    >;

    Usage

    Readiness / liveness checks

    To create a readiness / liveness checks use the @Health decorator.

    import { Health } from "@tsed/terminus";
    
    @Controller("/mongo")
    class MongoCtrl {
      @Health("/health")
      health() {
        // Here check the mongo health
        return Promise.resolve();
      }
    }

    You can also create an HealthCheckError when an error appear during your check.

    import { Health } from "@tsed/terminus";
    import { HealthCheckError } from "@godaddy/terminus";
    
    @Controller("/redis")
    class Redis {
      @Health("/health")
      health() {
        // Here check the redis health
        return Promise.reject(new HealthCheckError('failed', {
          redis: 'down',
        }));
      }
    }

    Graceful shutdown

    @tsed/terminus package give some decorators to handle Terminus hooks. These hooks allow you to adds graceful shutdown. Here is the list of decorators:

    • BeforeShutdown: Use this hook if you deploy your application with Kubernetes (see more details here),
    • OnSignal: cleanup hook, returning a promise (used to be onSigterm),
    • OnShutdown: called right before exiting,
    • OnSendFailureDuringShutdown: called before sending each 503 during shutdowns.

    Example:

    import { BeforeShutdown, OnSendFailureDuringShutdown, OnShutdown, OnSignal } from "@tsed/terminus";
    
    @Controller("/redis")
    class RedisCtrl {
      @BeforeShutdown()
      beforeShutdow() {
        console.log('called before shutdown');
      }
    
      @OnSignal()
      OnSignal() {
        console.log('called on signal');
      }
    
      @OnShutdown()
      OnShutdown() {
        console.log('called on shutdown');
      }
    
      @OnSendFailureDuringShutdown()
      OnSendFailureDuringShutdown() {
        console.log('on send failure during shutdown');
      }
    }

    Contributors

    Please read contributing guidelines here.

    Backers

    Thank you to all our backers! 🙏 [Become a backer]

    Sponsors

    Support this project by becoming a sponsor. Your logo will show up here with a link to your website. [Become a sponsor]

    License

    The MIT License (MIT)

    Copyright (c) 2016 - 2018 Romain Lenzotti

    Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

    Keywords

    none

    Install

    npm i @tsed/terminus

    DownloadsWeekly Downloads

    224

    Version

    6.98.1

    License

    MIT

    Unpacked Size

    37.2 kB

    Total Files

    33

    Last publish

    Collaborators

    • romakita