// continue looking at dns entry for changes in config
func configLoop(ctx log.Interface, cfgURL string) {
ticker := time.Tick(15 * time.Second)
for {
select {
case <-ticker:
newIPs, err := dnscfg.Get(dnsAddr, ldPort)
if err != nil {
ctx.WithError(err).Error("dns lookup")
continue
}
if len(newIPs) == 0 {
ctx.Error("no ip addresses found")
continue
}
oldIPs, err := httpcfg.Get(cfgURL)
if err != nil {
ctx.WithError(err).Error("getting config")
continue
}
if eq(newIPs, oldIPs) {
ctx.Info("config up to date")
continue
}
err = httpcfg.Set(cfgURL, newIPs)
if err != nil {
ctx.WithError(err).Error("setting config")
continue
}
ctx.WithField("ips", newIPs).Info("setting config")
}
}
}