varnish.md

Steps I've done to setup Varnish:

1. Install Varnish (with varnish modules) on Debian9 (using commands from: https://github.com/ezsystems/ezplatform-http-cache/blob/v0.4.0/docs/varnish/varnish.md) varnish is already the newest version (5.0.0-7+deb9u2). varnish-modules is already the newest version (0.9.1-4).

2. Change Varnish to use 80 port: (I've used a mix of: http://varnish-cache.org/docs/trunk/tutorial/putting_varnish_on_port_80.html and https://stackoverflow.com/questions/40867749/varnish-wont-start-as-a-daemon with -j none for now)

3. Use our vcl files: https://github.com/ezsystems/ezplatform-http-cache/tree/master/docs/varnish/vcl

4. Change parameters to point to my environment:

backend ezplatform {
    .host = "sd.local";
    .port = "80";
}

(with additional hosts entry added: 192.168.33.1 sd.local so that the domain is resolved correctly)

5. ezplatform.yml changes:

purge_type: 'http' (in http_cache section)
purge_servers: ['http://192.168.33.15:80'] (defined for main siteaccess group in http_cache section)

(as in https://doc.ezplatform.com/en/2.0/guide/http_cache/#update-yml-configuration)

6. Apache changes:

SetEnv SYMFONY_HTTP_CACHE 0
SetEnv SYMFONY_TRUSTED_PROXIES "192.168.33.15"

(IP of the varnish instance)

(as described here: https://doc.ezplatform.com/en/2.0/guide/http_cache/#configure-ez-publish)

7. Env cache cleared