Cloudways - Varnish cache is not cleared when the Varnish add-on is enabled

[vmanthos]

Describe the bug
On Cloudways, Varnish cache is not purged when WP Rocket's cache is cleared (Varnish add-on is enabled).

This leads to 404 on minified files.

Steps to reproduce the issue

1. Use a Cloudways-hosted website where Varnish is enabled. We don't have one currently, so we should create it from scratch.
2. Enable the Varnish add-on.
3. Make a change to a post.
4. Clear WP Rocket's cache.
5. Check, in an incognito browser window, for the updated post.

Related Ticket
https://secure.helpscout.net/conversation/686147105/83005/?folderId=2135277

[arunbasillal]

Possibly related ticket: https://secure.helpscout.net/conversation/718924487/88376/

[webtrainingwheels]

This needs further testing to validate.

I just had a similar case and it was solved by using this helper:
https://docs.wp-rocket.me/article/891-purge-varnish-when-using-a-proxy

on this site: https://bitcoin-casino-no-deposit-bonus.com
Cloudways + Varnish + Cloudflare.
Varnish Age header was reset to 0 after WP Rocket cache purge.

[arunbasillal]

@webtrainingwheels What is the IP you used in the proxy? I tried with 127.0.0.1 and ports 8080 and 6082. No luck.

[webtrainingwheels]

Did not have to change the IP - left it as localhost
Only set the domain here: https://github.com/wp-media/wp-rocket-helpers/blob/master/compatibility/wp-rocket-compat-varnish-ip-proxy/wp-rocket-compat-varnish-ip-proxy.php#L22

[piotrbak]

Cloudways provides an API to clear Varnish. That's probably the most reliable way to handle it:
https://www.cloudways.com/blog/automatically-purging-varnish-cache-using-cloudways-api/

[piotrbak]

@webtrainingwheels What is the IP you used in the proxy? I tried with 127.0.0.1 and ports 8080 and 6082. No luck.

Setting custom Varnish IP to 127.0.0.1:8080 resolved the problem for me.

[Contributolo]

I had no success to use WP Rocket with CLoudways and varnish. I tried the helper plugin and filled in:
127.0.0.1:8080 fpr varnish ip. But the varnish cache isn't cleared when I clear the wp rocket cache... so I cannot use WP Rocket along with cloudways and varnish?

[alfonso100]

Another case here:
https://secure.helpscout.net/conversation/1037049553/137432?folderId=2683093

In this case, using the following helper solved the issue:
https://github.com/wp-media/wp-rocket-helpers/blob/master/compatibility/wp-rocket-compat-varnish-ip-proxy/wp-rocket-compat-varnish-ip-proxy.php

I had to set​ a custom varnish host: subdomain.domain.com,
​And also a custom varnish IP and port: 127.0.0.1:8080

I've noticed a difference between WP Rocket Varnish function and Breeze's Varnish function, specifically in the parameters we use at the wp_remote_request(). So I left a note with some additional comments on the ticket. Just in case it helps.

[Tabrisrp]

Could we get a direct line with Cloudways about this?

Looking at the history, different solutions seem to have worked at different times, so it's hard for the dev team to determine the one solution to go with.

Looking at the Breeze plugin, when they perform the Varnish cache purge, the default value for the host is 127.0.0.1. So some clarifications would be really helpful for us.

[GeekPress]

@Tabrisrp Contact in progress => https://twitter.com/wp_rocket/status/1247786849763856386

[GeekPress]

@Tabrisrp Cloudways replied to the tweet with an email to contact. Could you please contact them?

[Tabrisrp]

Message sent

[Tabrisrp]

Received everything we need to work on this

Scope a solution ✅

• Create a compatibility class: WP_Rocket\ThirdParty\Hostings\Cloudways
• We can use the $_SERVER['cw_allowed_ip'] variable to identify that we are on Cloudways
• Auto-enable Varnish + display custom message on Varnish add-on, like we do for Flywheel for example
• Cloudways Varnish uses http://127.0.0.1:8080 for its URL, filter rocket_varnish_ip

Effort ✅
Effort [S]