diff -uNr cloud-init-18.3/cloudinit/config/cc_resolv_conf.py cloud-init-18.3-new/cloudinit/config/cc_resolv_conf.py
 --- cloud-init-18.3/cloudinit/config/cc_resolv_conf.py	2018-06-20 05:49:26.000000000 +0530
 +++ cloud-init-18.3-new/cloudinit/config/cc_resolv_conf.py	2018-09-20 20:33:38.368316711 +0530

 @@ -55,10 +55,10 @@
  
  frequency = PER_INSTANCE
  

 -distros = ['fedora', 'opensuse', 'rhel', 'sles']
 +distros = ['fedora', 'opensuse', 'rhel', 'sles', 'photon']

  
  
 -def generate_resolv_conf(template_fn, params, target_fname="/etc/resolv.conf"):
 +def generate_resolv_conf(template_fn, params, target_fname="/etc/systemd/resolved.conf"):
      flags = []
      false_flags = []
  
 @@ -104,12 +104,13 @@
      if "resolv_conf" not in cfg:
          log.warn("manage_resolv_conf True but no parameters provided!")
  
 -    template_fn = cloud.get_template_filename('resolv.conf')
 +    template_fn = cloud.get_template_filename('systemd.resolved.conf')
      if not template_fn:
 -        log.warn("No template found, not rendering /etc/resolv.conf")
 +        log.warn("No template found, not rendering /etc/systemd/resolved.conf")
          return
  
      generate_resolv_conf(template_fn=template_fn, params=cfg["resolv_conf"])
 +    util.subp(["systemctl", "restart", "systemd-resolved"])
      return
  
  # vi: ts=4 expandtab

 diff -uNr cloud-init-18.3/templates/systemd.resolved.conf.tmpl cloud-init-18.3-new/templates/systemd.resolved.conf.tmpl
 --- cloud-init-18.3/templates/systemd.resolved.conf.tmpl	1970-01-01 05:30:00.000000000 +0530
 +++ cloud-init-18.3-new/templates/systemd.resolved.conf.tmpl	2018-09-20 20:35:54.672313067 +0530

 @@ -0,0 +1,15 @@
 +## template:jinja
 +# Your system has been configured with 'manage-resolv-conf' set to true.
 +# As a result, cloud-init has written this file with configuration data
 +# that it has been provided. Cloud-init, by default, will write this file
 +# a single time (PER_ONCE).
 +#
 +[Resolve]
 +LLMNR=false
 +{% if nameservers is defined %}
 +DNS={% for server in nameservers %}{{server}} {% endfor %}
 +{% endif %}
 +
 +{% if searchdomains is defined %}
 +Domains={% for search in searchdomains %}{{search}} {% endfor %}
 +{% endif %}