diff --git a/doc/puppet_classes/prometheus_cd_3A_3Aparams.html b/doc/puppet_classes/prometheus_cd_3A_3Aparams.html
index ea4bd10..f2b5053 100644
--- a/doc/puppet_classes/prometheus_cd_3A_3Aparams.html
+++ b/doc/puppet_classes/prometheus_cd_3A_3Aparams.html
@@ -502,6 +502,78 @@
         —
         <div class='inline'>
 <p>reduce parallel WAL replay workers</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_write_external</span>
+      
+      
+        <span class='type'>(<tt>Boolean</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>false</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>whether to allow remote postgres</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_auth_ext_user</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;changeme&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>user for writing to extern instance</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_auth_ext_pass</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;changeme&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>password for writing to extern instance</p>
+</div>
+      
+    </li>
+  
+    <li>
+      
+        <span class='name'>ps_external_url</span>
+      
+      
+        <span class='type'>(<tt>String</tt>)</span>
+      
+      
+        <em class="default">(defaults to: <tt>&#39;http://change.local&#39;</tt>)</em>
+      
+      
+        &mdash;
+        <div class='inline'>
+<p>the full url for the remote write point</p>
 </div>
       
     </li>
@@ -517,10 +589,6 @@
         <pre class="lines">
 
 
-28
-29
-30
-31
 32
 33
 34
@@ -575,10 +643,22 @@
 83
 84
 85
-86</pre>
+86
+87
+88
+89
+90
+91
+92
+93
+94
+95
+96
+97
+98</pre>
       </td>
       <td>
-        <pre class="code"><span class="info file"># File 'manifests/params.pp', line 28</span>
+        <pre class="code"><span class="info file"># File 'manifests/params.pp', line 32</span>
 
 class prometheus_cd::params (
 
@@ -597,11 +677,15 @@ class prometheus_cd::params (
   String $ps_fw_prefix          = &#39;50&#39;,
   String $ps_main_port          = &#39;9090&#39;,
 
-  # auth
+  # auth prometheus
   String $ps_auth_user          = &#39;changeme&#39;,
   String $ps_auth_pass          = &#39;changeme&#39;,
   String $ps_web_pass           = &#39;changeme&#39;,
 
+  # auth remote
+  String $ps_auth_ext_user      = &#39;changeme&#39;,
+  String $ps_auth_ext_pass      = &#39;changeme&#39;,
+
   # storage
   String $ps_retention_time     = &#39;15d&#39;,
   String $ps_retention_size     = &#39;20GB&#39;,
@@ -616,6 +700,10 @@ class prometheus_cd::params (
   String $ps_oom_score          = &#39;500&#39;,
   String $ps_max_procs          = &#39;1&#39;,
 
+  # remote write external
+  Boolean $ps_write_external    = false,
+  String $ps_external_url       = &#39;http://change.local&#39;,
+
 ) {
   # defaults
   $fqdn                   = $facts[&#39;networking&#39;][&#39;fqdn&#39;]
diff --git a/manifests/params.pp b/manifests/params.pp
index 688eec4..8c88892 100644
--- a/manifests/params.pp
+++ b/manifests/params.pp
@@ -23,7 +23,11 @@
 # @param [String] ps_high_mem soft limit to make kernel reclaim earlier
 # @param [String] ps_swap_mem allow swap, but limit it
 # @param [String] ps_oom_score OOM killer choosing prometheus
-# @param [String] ps_max_procs  reduce parallel WAL replay workers
+# @param [String] ps_max_procs reduce parallel WAL replay workers
+# @param [Boolean] ps_write_external whether to allow remote postgres
+# @param [String] ps_auth_ext_user user for writing to extern instance
+# @param [String] ps_auth_ext_pass password for writing to extern instance
+# @param [String] ps_external_url the full url for the remote write point
 ##############################################################################
 class prometheus_cd::params (
 
@@ -42,11 +46,15 @@ class prometheus_cd::params (
   String $ps_fw_prefix          = '50',
   String $ps_main_port          = '9090',
 
-  # auth
+  # auth prometheus
   String $ps_auth_user          = 'changeme',
   String $ps_auth_pass          = 'changeme',
   String $ps_web_pass           = 'changeme',
 
+  # auth remote
+  String $ps_auth_ext_user      = 'changeme',
+  String $ps_auth_ext_pass      = 'changeme',
+
   # storage
   String $ps_retention_time     = '15d',
   String $ps_retention_size     = '20GB',
@@ -61,6 +69,10 @@ class prometheus_cd::params (
   String $ps_oom_score          = '500',
   String $ps_max_procs          = '1',
 
+  # remote write external
+  Boolean $ps_write_external    = false,
+  String $ps_external_url       = 'http://change.local',
+
 ) {
   # defaults
   $fqdn                   = $facts['networking']['fqdn']
diff --git a/templates/prometheus.yml.erb b/templates/prometheus.yml.erb
index 9c8521a..be62931 100644
--- a/templates/prometheus.yml.erb
+++ b/templates/prometheus.yml.erb
@@ -35,4 +35,11 @@ remote_write:
   - url: "http://localhost:9090/api/v1/write"
     basic_auth:
       username: <%= @ps_auth_user %>
-      password: <%= @ps_auth_pass %>
\ No newline at end of file
+      password: <%= @ps_auth_pass %>
+<% if @ps_write_external == true -%>
+remote_write:
+  - url: "<%= @ps_external_url %>"
+    basic_auth:
+      username: <%= @ps_auth_ext_user %>
+      password: <%= @ps_auth_ext_pass %>
+<% end -%>
\ No newline at end of file