Varnish 调用后端主机的虚拟主机配置代理后端一台主机内的多台虚拟主机配置
Backends and virtual hosts in Varnish
Varnish fully supports virtual hosts. They might howeverwork in a somewhat counter-intuitive fashion since they are never declaredexplicitly. You set up the routing of incoming HTTP requests in vcl_recv. Ifyou want this routing to be done on the basis of virtual hosts you just need toinspect req.http.host.
You can have something like this:
sub vcl_recv {
if(req.http.host ~ "foo.com") {
setreq.backend_hint = foo;
} elsif(req.http.host ~ "bar.com") {
setreq.backend_hint = bar;
}
}
Note that the first regular expressions will match"foo.com", "www.foo.com", "zoop.foo.com" and any other host endingin "foo.com". In this example this is intentional but you might wantit to be a bit more tight, maybe relying on the == operator in stead, likethis:
sub vcl_recv {
if(req.http.host == "foo.com" || req.http.host == "www.foo.com") {
setreq.backend_hint = foo;
}
}
