add header for http healthcheck (#4085)

pkg/config/v1/common.go

@@ -129,3 +129,8 @@ type HTTPPluginOptions struct {
 type HeaderOperations struct {
 	Set map[string]string `json:"set,omitempty"`
 }
+
+type HTTPHeader struct {
+	Name  string `json:"name"`
+	Value string `json:"value"`
+}

pkg/config/v1/proxy.go

@@ -97,6 +97,9 @@ type HealthCheckConfig struct {
 	// Path specifies the path to send health checks to if the
 	// health check type is "http".
 	Path string `json:"path,omitempty"`
+	// Headers specifies the headers to send health checks to if the
+	// health check type is "http".
+	HTTPHeaders []HTTPHeader `json:"httpHeaders,omitempty"`
 }
 
 type DomainConfig struct {