Health Check

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原文： https://docs.gofiber.io/api/middleware/healthcheck

Health Check 运行状况检查

Liveness and readiness probes middleware for Fiber that provides two endpoints for checking the liveness and readiness state of HTTP applications.

Liveness 和 readiness 探测中间件，用于 Fiber，它提供两个端点来检查 HTTP 应用程序的 liveness 和 readiness 状态。

Overview 概述

Liveness Probe: Checks if the server is up and running.
运行状况探测：检查服务器是否启动并运行。
- Default Endpoint: /livez 默认端点： /livez
- Behavior: By default returns true immediately when the server is operational. 行为：默认情况下，当服务器运行时立即返回 true 。
Readiness Probe: Assesses if the application is ready to handle requests.
就绪探测：评估应用程序是否准备好处理请求。
- Default Endpoint: /readyz 默认端点： /readyz
- Behavior: By default returns true immediately when the server is operational. 行为：默认情况下，当服务器运行时立即返回 true 。
HTTP Status Codes:
HTTP 状态代码：
- 200 OK: Returned when the checker function evaluates to true. 200 OK ：当检查器函数评估为 true 时返回。
- 503 Service Unavailable: Returned when the checker function evaluates to false. 503 Service Unavailable ：当检查器函数评估为 false 时返回。

Signatures 签名

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func New(config Config) fiber.Handler

Examples 示例

Import the middleware package that is part of the Fiber web framework

导入 Fiber Web 框架的一部分中间件包

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import (
    "github.com/gofiber/fiber/v2"
    "github.com/gofiber/fiber/v2/middleware/healthcheck"
)

After you initiate your Fiber app, you can use the following possibilities:

在启动 Fiber 应用后，您可以使用以下可能性：

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// Provide a minimal config
app.Use(healthcheck.New())

// Or extend your config for customization
app.Use(healthcheck.New(healthcheck.Config{
    LivenessProbe: func(c *fiber.Ctx) bool {
        return true
    },
    LivenessEndpoint: "/live",
    ReadinessProbe: func(c *fiber.Ctx) bool {
        return serviceA.Ready() && serviceB.Ready() && ...
    },
    ReadinessEndpoint: "/ready",
}))

Config 配置

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type Config struct {
    // Next defines a function to skip this middleware when returned true.
    //
    // Optional. Default: nil
    Next func(c *fiber.Ctx) bool

    // Function used for checking the liveness of the application. Returns true if the application
    // is running and false if it is not. The liveness probe is typically used to indicate if 
    // the application is in a state where it can handle requests (e.g., the server is up and running).
    //
    // Optional. Default: func(c *fiber.Ctx) bool { return true }
    LivenessProbe HealthChecker

    // HTTP endpoint at which the liveness probe will be available.
    //
    // Optional. Default: "/livez"
    LivenessEndpoint string

    // Function used for checking the readiness of the application. Returns true if the application
    // is ready to process requests and false otherwise. The readiness probe typically checks if all necessary
    // services, databases, and other dependencies are available for the application to function correctly.
    //
    // Optional. Default: func(c *fiber.Ctx) bool { return true }
    ReadinessProbe HealthChecker

    // HTTP endpoint at which the readiness probe will be available.
    // Optional. Default: "/readyz"
    ReadinessEndpoint string
}

Default Config 默认配置

The default configuration used by this middleware is defined as follows:

此中间件使用的默认配置定义如下：

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func defaultLivenessProbe(*fiber.Ctx) bool { return true }

func defaultReadinessProbe(*fiber.Ctx) bool { return true }

var ConfigDefault = Config{
    LivenessProbe:     defaultLivenessProbe,
    ReadinessProbe:    defaultReadinessProbe,
    LivenessEndpoint:  "/livez",
    ReadinessEndpoint: "/readyz",
}

最后修改 February 5, 2024: 更新 (f57b279)