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@@ -85,13 +85,26 @@ docker run varnish varnishreload -h
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## Additional configuration
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+### Cache size (VARNISH_SIZE)
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+
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By default, the containers will use a cache size of 100MB, which is usually a bit too small, but you can quickly set it through the `VARNISH_SIZE` environment variable:
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```console
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$ docker run --tmpfs /var/lib/varnish/varnishd:exec -p 8080:80 -e VARNISH_SIZE=2G %%IMAGE%%
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```
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-Additionally, you can add arguments to `docker run` after `%%IMAGE%%`, if the first one starts with a `-`, they will be appendend to the [default command](https://github.com/varnish/docker-varnish/blob/master/docker-varnish-entrypoint#L8):
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+### Listening ports (VARNISH_HTTP_PORT/VARNISH_PROXY_PORT)
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+
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+Varnish will listen to HTTP traffic on port `80`, and this can be overridden by setting the environment variable `VARNISH_HTTP_PORT`. Similarly, the variable `VARNISH_PROXY_PORT` (defaulting to `8443`) dictate the listening port for the [PROXY protocol](https://www.haproxy.org/download/1.8/doc/proxy-protocol.txt) used notably to interact with [hitch](https://hub.docker.com/_/hitch) (which, coincidentally, uses `8443` as a default too!).
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+
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+```console
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+# instruct varnish to listening to port 7777 instead of 80
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+$ docker run --tmpfs /var/lib/varnish/varnishd:exec -p 8080:7777 -e VARNISH_HTTP_PORT=7777 %%IMAGE%%
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+```
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+
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+### Extra arguments
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+
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+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):
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```console
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# extend the default keep period
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yosifkit