Does this still work?

[edu-nixon]

Hey,

Thanks for this awesome package. We are using ec2 + nginx + varnish and 15% of our prerender requests are throwing 504, in our logs this requests look like this:

2018/08/20 10:51:48 [error] 14869#14869: *146686 service.prerender.io could not be resolved (2: Server failure), client: 127.0.0.1, server: www.ourDomain.com, request: "GET /los-lagos/osorno/veterinario HTTP/1.1", host: "www.ourDomain.com"

We tried this package with no success, we also searched google for other people using prerender + varnish and didn't have any luck, is there someone using this package successfully?

Any help its greatly appreciated, thanks!

[thoop]

Is your varnish server caching the IP address of our Prerender.io service? We had issues with nginx in the past where it cached IP's and that caused issues if the IP of our load balancer ever changed. The 15% failure rate kind of seems like it could be something like that.

[MWers]

That error looks like an nginx error and it seems like it's having trouble resolving service.prerender.io. Are you able to reliably resolve that address directly from your EC2 instance? You might consider setting nginx to use Google's DNS instead of local DNS using the following:

resolver 4.4.4.4 8.8.8.8;

http://nginx.org/en/docs/http/ngx_http_core_module.html#resolver