func reconfigure(u config.Upstream) error {
u.Lock()
defer u.Unlock()
upstream, err := os.Create(u.File)
if err != nil {
return err
}
defer upstream.Close()
upstream.WriteString(fmt.Sprintf("upstream %s {\n", u.Name))
upstream_filenames, err := filepath.Glob(filepath.Join(u.ContainerFolder, "*.upstream"))
if err != nil {
return err
}
for _, upstream_filename := range upstream_filenames {
content, err := ioutil.ReadFile(upstream_filename)
if err != nil {
return err
}
upstream.WriteString(fmt.Sprintf(" %s", string(content)))
}
upstream.WriteString("}\n")
return nil
}
func addInstance(u config.Upstream, i *ec2.Instance) error {
filename := getUpstreamFilenameForInstance(u, i)
u.Lock()
defer u.Unlock()
upstream := fmt.Sprintf("server %s:80 max_fails=3 fail_timeout=60s; # %s\n", i.PrivateDNSName, i.InstanceId)
buf := []byte(upstream)
if err := ioutil.WriteFile(filename, buf, 0640); err != nil {
return err
}
return nil
}