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document VARNISH_VCL_FILE

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Guillaume Quintard 2025-09-19 12:04:59 -07:00
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@ -92,6 +92,10 @@ Varnish will listen to HTTP traffic on port `80`, and this can be overridden by
$ docker run --tmpfs /var/lib/varnish/varnishd:exec -p 8080:7777 -e VARNISH_HTTP_PORT=7777 %%IMAGE%%
```
### VCL file path
The default Varnish configuration file is `/etc/varnish/default.vcl`, but this can be overridden with the `VARNISH_VCL_FILE` environment variable. This is useful if you want a single image that can be deployed with different configurations baked in it.
### Extra arguments
Additionally, you can add arguments to `docker run` after `%%IMAGE%%`, if the first argument starts with a `-`, the whole list will be appendend to the [default command](https://github.com/varnish/docker-varnish/blob/master/fresh/debian/scripts/docker-varnish-entrypoint):