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authorOleg Pykhalov <go.wigust@gmail.com>2020-10-11 20:42:48 +0300
committerOleg Pykhalov <go.wigust@gmail.com>2020-10-14 23:41:26 +0300
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treed7121270ff8982c73151edf7cabfe40d32dfcc48 /doc/guix-cookbook.texi
parente835c03e4462dd7f675cbc101fbda5b076cbdd86 (diff)
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services: nginx: Add lua module.
* gnu/services/web.scm (<nginx-configuration>) [lua-package-path, lua-package-cpath]: New record types. * gnu/services/web.scm (default-nginx-config): Use them. * doc/guix.texi (Web Services): Document this. * doc/guix-cookbook.texi (System Configuration): Document this.
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diff --git a/doc/guix-cookbook.texi b/doc/guix-cookbook.texi
index affb68ca12..db3d7e505b 100644
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+++ b/doc/guix-cookbook.texi
@@ -1353,6 +1353,7 @@ reference.
* Running Guix on a Linode Server:: Running Guix on a Linode Server
* Setting up a bind mount:: Setting up a bind mount in the file-systems definition.
* Getting substitutes from Tor:: Configuring Guix daemon to get substitutes through Tor.
+* Setting up NGINX with Lua:: Configuring NGINX web-server to load Lua modules.
@end menu
@node Customizing the Kernel
@@ -2114,6 +2115,63 @@ sudo herd set-http-proxy guix-daemon http://localhost:9250
guix build --substitute-urls=https://bp7o7ckwlewr4slm.onion …
@end example
+@node Setting up NGINX with Lua
+@section Setting up NGINX with Lua
+@cindex nginx, lua, openresty, resty
+
+NGINX could be extended with Lua scripts.
+
+Guix provides NGINX service with ability to load Lua module and specific
+Lua packages, and reply to requests by evaluating Lua scripts.
+
+The following example demonstrates system definition with configuration
+to evaluate @file{index.lua} Lua script on HTTP request to
+@uref{http://localhost/hello} endpoint:
+
+@example
+local shell = require "resty.shell"
+
+local stdin = ""
+local timeout = 1000 -- ms
+local max_size = 4096 -- byte
+
+local ok, stdout, stderr, reason, status =
+ shell.run([[/run/current-system/profile/bin/ls /tmp]], stdin, timeout, max_size)
+
+ngx.say(stdout)
+@end example
+
+@lisp
+(use-modules (gnu))
+(use-service-modules #;… web)
+(use-package-modules #;… lua)
+(operating-system
+ ;; …
+ (services
+ ;; …
+ (service nginx-service-type
+ (nginx-configuration
+ (modules
+ (list
+ (file-append nginx-lua-module "/etc/nginx/modules/ngx_http_lua_module.so")))
+ (lua-package-path (list lua-resty-core
+ lua-resty-lrucache
+ lua-resty-signal
+ lua-tablepool
+ lua-resty-shell))
+ (lua-package-cpath (list lua-resty-signal))
+ (server-blocks
+ (list (nginx-server-configuration
+ (server-name '("localhost"))
+ (listen '("80"))
+ (root "/etc")
+ (locations (list
+ (nginx-location-configuration
+ (uri "/hello")
+ (body (list #~(format #f "content_by_lua_file ~s;"
+ #$(local-file "index.lua"))))))))))))))
+@end lisp
+
@c *********************************************************************
@node Advanced package management
@chapter Advanced package management