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!!!
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
}