Allow overriding Host configuration in HTTP checks

Author: mcorbin

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-1-buster as build-env
+FROM golang:1.20.5-bullseye as build-env
 
 ADD . /app
 WORKDIR /app

docker.sh

@@ -2,5 +2,5 @@
 
 version=$1
 
-docker build -t mcorbin/cabourotte:${version} .
-docker push mcorbin/cabourotte:${version}
+docker build -t appclacks/cabourotte:${version} .
+docker push appclacks/cabourotte:${version}

healthcheck/http.go

@@ -27,6 +27,7 @@ type HTTPHealthcheckConfiguration struct {
 	ValidStatus []uint `json:"valid-status" yaml:"valid-status"`
 	// can be an IP or a domain
 	Target     string            `json:"target"`
+	Host       string            `json:"host,omitempty"`
 	Method     string            `json:"method"`
 	Port       uint              `json:"port"`
 	Redirect   bool              `json:"redirect"`
@@ -233,6 +234,9 @@ func (h *HTTPHealthcheck) Execute() error {
 	if h.Config.Redirect {
 		redirect = nil
 	}
+	if h.Config.Host != "" {
+		req.Host = h.Config.Host
+	}
 	client := &http.Client{
 		Transport: h.transport,
 		CheckRedirect: func(req *http.Request, via []*http.Request) error {