github.com/Financial-Times/go-fthealth on Go

This is a Golang implementation of the FT health check standard endpoint as a library that integrates nicely with the standard Go http library.

LATEST VERSION: v1_1 (parity with v1.1 approved in FT health standard document) package contains the latest FT standards implementation, check example below on how to use it.

Note: The v1a package implementation is DEPRECATED, along with the first implementation which is in the main package!!!

Installation:

go get github.com/Financial-Times/go-fthealth

Example application with a health check:

package main

import (
    "fmt"
    fthealth "github.com/Financial-Times/go-fthealth/v1_1"
    "github.com/gorilla/mux"
    "net/http"
)

func main() {
    servicesRouter := mux.NewRouter()

    checks := []fthealth.Check{MyCheck("Some proper neo4j url")}
    healthCheck := &fthealth.HealthCheck{SystemCode: "upp-relations-api", Name: "Relations API", Description: "Retrieves content collection relations from Neo4j", Checks: checks}
    servicesRouter.HandleFunc("/__health", fthealth.Handler(healthCheck))

    err := http.ListenAndServe(":8080", servicesRouter)
    if err != nil {
        panic(err)
    }
}

func MyCheck(neoURL string) fthealth.Check {
    return fthealth.Check{
        ID:               "check-connectivity-to-neo4j",
        Name:             "Check connectivity to Neo4j",
        Severity:         1,
        BusinessImpact:   "Content collections relations won't be available",
        TechnicalSummary: fmt.Sprintf(`Cannot connect to Neo4j (%v). Check that Neo4j instance is up and running`, neoURL),
        PanicGuide:       "https://dewey.ft.com/upp-relations-api.html",
        Checker:          checker,
    }
}

func checker() (string, error) {
    err := func() error { return nil }() // DO A PROPER CHECK HERE
    if err == nil {
        return "Connectivity to Neo4j is ok", err
    }
    return "Error connecting to Neo4j", err
}