code: func managedHostsFileContent(hostIP, hostName, hostDomainName string, hostAliases []v1.HostAlias) []byte {
  	var buffer bytes.Buffer
  	buffer.WriteString(managedHostsHeader)
  	buffer.WriteString("127.0.0.1\tlocalhost\n")                      // ipv4 localhost
  	buffer.WriteString("::1\tlocalhost ip6-localhost ip6-loopback\n") // ipv6 localhost
  	buffer.WriteString("fe00::0\tip6-localnet\n")
  	buffer.WriteString("fe00::0\tip6-mcastprefix\n")
  	buffer.WriteString("fe00::1\tip6-allnodes\n")
  	buffer.WriteString("fe00::2\tip6-allrouters\n")
  	if len(hostDomainName) > 0 {
  		buffer.WriteString(fmt.Sprintf("%s\t%s.%s\t%s\n", hostIP, hostName, hostDomainName, hostName))
  	} else {
  		buffer.WriteString(fmt.Sprintf("%s\t%s\n", hostIP, hostName))
  	}
  	buffer.Write(hostsEntriesFromHostAliases(hostAliases))
  	return buffer.Bytes()
  }
docs: // managedHostsFileContent generates the content of the managed etc hosts based on Pod IP and other
  // information.