Varnish implements cache acceleration

Varnish implements cache acceleration

1. Using varnish to implement cache acceleration for nginx

1. Experimental environment:

(1) one varnish cache server and one nginx server

(2) turn off the firewall and selinux

two。 Configure varnish

(1) modify the varnish configuration file:

Create a directory: mkdir-pv / data/varnish/cache modify owner: chown varnish.varnish / data/varnish/cache

(2) Test:

Second, varnish realizes the separation of dynamic and static.

(1) varnish configuration:

(2) Test:

(3) set multiple groups in the attachment content and do the load:

Example: import directors backend imgsrv1 {.host = "192.168.10.11"; .port = "80";} backend imgsrv2 {.host = "192.168.10.12"; .port = "80";} backend appsrv1 {.host = "192.168.10.21"; .port = "80" } backend appsrv2 {.host = "192.168.10.22"; .port = "80";} sub vcl_init {new imgsrvs = directors.random (); imgsrvs.add_backend (imgsrv1,10); imgsrvs.add_backend (imgsrv2,20); new staticsrvs = directors.round_robin (); appsrvs.add_backend (appsrv1); appsrvs.add_backend (appsrv2) New appsrvs = directors.hash (); appsrvs.add_backend (appsrv1,1); appsrvs.add_backend (appsrv2,1);} sub vcl_recv {if (req.url ~ "(? I)\. (css | js) $" {set req.backend_hint = staticsrvs.backend () } if (req.url ~ "(?)\. (jpg | jpeg | png | gif) $" {set req.backend_hint = imgsrvs.backend ();} else {set req.backend_hint = appsrvs.backend (req.http.cookie);}}

Security Inspection:

.probe: define the health status detection method; .url: the URL to be requested when testing. Default is "/"; .request: the specific request issued. .request = "GET / .healthtest.html HTTP/1.1", "Host: www.ww.com", "Connection: close" .window: judge its health status based on the number of recent checks Threshold: among the most recent checks defined in .window, the number of times defined by threshold hhold is successful; success threshold; .interval: detection frequency; .timeout: timeout; .timeout: expected response code. Default is 200. Configuration of health status detection: probe PB_NAME {} backend NAME = {.probe = PB_NAME;.}