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<p class="MsoNormal">Looking at a VCL I use to set hostname and this seems to work-<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">sub vcl_deliver {<o:p></o:p></p>
<p class="MsoNormal"> set resp.http.X-Cache-Node = server.hostname;<o:p></o:p></p>
<p class="MsoNormal">}<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Maybe you can use in form of server.environmental_variable<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">varnish-misc <varnish-misc-bounces+charles=beachcamera.com@varnish-cache.org> on behalf of Hugues Alary <hugues@betabrand.com><br>
<b>Date: </b>Monday, September 9, 2019 at 6:09 PM<br>
<b>To: </b>varnish-misc <varnish-misc@varnish-cache.org><br>
<b>Subject: </b>Environment variables in VCL<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Hi there, <o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">I'm using Varnish in a Kubernetes cluster and my configuration needs to use environment variables.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">More specifically, I'm trying to declare a `backend` with a `.host` whose value is an environment variable.<o:p></o:p></p>
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<span style="font-family:"Courier New"">backend b0 {<br>
.host = "<b>$ENVIRONMENT_VARIABLE_HOSTNAME</b>";<br>
.port = "80";<br>
.connect_timeout = 300s;<br>
.first_byte_timeout = 300s;<br>
.between_bytes_timeout = 300s;</span><o:p></o:p></p>
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<p class="MsoNormal"><span style="font-family:"Courier New"">}</span><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">This doesn't work. It tried using the std.get_env() function but it doesn't work in this context.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><b>Is there any way to use environment variables in VCL, or do I have to create a configuration template?</b><o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks for your help,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Cheers,<o:p></o:p></p>
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<p class="MsoNormal">-Hugues<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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