What is the best way to cluster varnish?

Question

I need to have 3 varnish instances, I follow this guide creating-varnish-cluster and now I have those systems

• 3 servers that have varnish, each varnish has vcl like that vcl-cluster
• 1 backend server, that contains application and Nginx for load balancing between varnish servers, Nginx config: nginx-config

but requests received in Nginx and passes through varnish but varnish server can't forward request to the backend. when I call directly backend it perfectly works.

how can I fix this issue? and is there any better solution for varnish scaling? (except varnish plus:D)

Answer 1

server.identity is the hostname of the machine, by default. I assume your machines are not called node1, node2 and node3, so you need to edit your VCL to reflect that.