correct way to include the module
Opened this issue · 3 comments
Deleted user commented
I'm facing this problem again and again, unsure how to solve it the correct way:
#!/usr/bin/env lua5.1
local session = require "resty.session".start{
name = "filter",
storage = "redis",
strategy = "regenerate",
redis = {
prefix = 'waf',
host = 'redis-service',
},
cookie = {
lifetime = 1800,
--renew = 1800,
},
secret = "somesecret..." --required to set a fixed session secret, to prevent session lost on nginx restart / reload
}
local base64 = require 'base64'
--user is not authorized
if not session.data.authorized then
...
end
Openresty log:
2020/07/26 11:50:27 [error] 7#7: *1 lua entry thread aborted: runtime error: /usr/local/openresty/nginx/html/entry.lua:21: attempt to index local 'session' (a nil value)
From my point of view the session module isn't loaded somehow correctly, it's installed using OPM.
root@324eaa7d19cd:/tmp/lua-gd-2_0_33r2# opm list
bungle/lua-resty-session 3.6
openresty/lua-resty-string 0.11
Is there any way how I can dig deeper into this problem?
It's for sure somehow caused by redis, @bungle any idea how to debug deeper?
Using the hello world example works fine, seems like the module is loaded correctly there.
ieugen commented
Hi,
I'm also atempting to use Redis as a session store and getting the same result.
I'm using this as a configuration.
Have you managed to figure out a solution?
Very little documentation about this and hard to debug ( or I don't know how !? ) .
server {
listen 80;
server_name localhost;
default_type text/html;
# redis session backen
set $session_storage redis;
set $session_redis_host 127.0.0.1;
bungle commented
local session, err = require "resty.session".start{...}
print(err)
ieugen commented
Thank you @bungle . I managed to discover this the other day and forgot to post a comment.
In my case I was receiving an error.
I am running openresty docker container (via compose) and I had to use set $session_redis_host <docker-compose-service-name>; In my case redis . I
For others who run into this, my config files bellow.
@bungle: They can be edited and added as examples .
version: '3.9'
services:
redis:
image: redis
ports:
- 6379:6379
volumes:
- redis_data:/data
resty:
build: .
ports:
- 8080:80
volumes:
# Configurations
- ./nginx/conf.d:/etc/nginx/conf.d
- ./nginx/lua:/etc/nginx/lua
# temporary file storage
- resty_temp:/var/run/openresty/
volumes:
resty_temp:
redis_data:
nginx/conf/default.conf
lua_package_path "/etc/nginx/lua/?.lua;;";
# Settign lua cahche off will reload lua files every time - avoid nginx restarts
lua_code_cache off; #development only
server {
listen 80;
server_name localhost;
default_type text/html;
# https://github.com/bungle/lua-resty-session#none-cipher
set $session_cipher none;
# https://github.com/bungle/lua-resty-session#pluggable-serializers
set $session_serializer json;
# https://github.com/bungle/lua-resty-session#redis-storage-adapter
set $session_storage redis;
set $session_redis_host 'redis';
set $session_secret 623q4hR325t36VsCD3g567922IC0073T;
# https://github.com/openresty/lua-resty-redis/issues/159
resolver local=on ipv6=off;
resolver_timeout 5s;
#charset koi8-r;
#access_log /var/log/nginx/host.access.log main;
#error_page 404 /404.html;
# redirect server error pages to the static page /50x.html
#
error_page 500 502 503 504 /50x.html;
location = /50x.html {
root /usr/local/openresty/nginx/html;
}
location /lua_content {
# MIME type determined by default_type:
default_type 'text/plain';
content_by_lua_block {
ngx.say('Hello,world!')
}
}
location /greet {
default_type text/plain;
content_by_lua_block {
local hello = require "hello"
hello.greet("a Lua module")
}
}
location / {
content_by_lua '
ngx.say("<html><body><a href=/start>Start the test</a>!</body></html>")
';
}
location /start {
content_by_lua '
local session, err = require "resty.session".start()
if not session then
ngx.log(ngx.ERR,"session present" .. err)
end
session.data.name = "Hello nurse"
session.data.uid = "123"
session:save()
ngx.say("<html><body>Session started. ",
"<a href=/test>Check if it is working</a>!</body></html>")
';
}
location /test {
content_by_lua '
local session = require "resty.session".open()
if session.present then
ngx.log(ngx.ERR, "session uid" .. session.data.uid)
end
if not session.started then
ngx.print(session.data.uid)
session:start()
end
ngx.say("<html><body>Session was started by <strong>",
session.data.name or "Anonymous",
"</strong>! <a href=/modify>Modify the session</a>.</body></html>")
';
}
location /modify {
content_by_lua '
local session = require "resty.session".start()
session.data.name = "Lua Fan"
session:save()
ngx.say("<html><body>Session modified. ",
"<a href=/modified>Check if it is modified</a>!</body></html>")
';
}
location /modified {
content_by_lua '
local session = require "resty.session".open()
ngx.say("<html><body>Session was modified by <strong>",
session.data.name or "Anonymous",
"</strong>! <a href=/destroy>Destroy the session</a>.</body></html>")
';
}
location /destroy {
content_by_lua '
require "resty.session".destroy()
ngx.say("<html><body>Session was destroyed. ",
"<a href=/check>Is it really so</a>?</body></html>")
';
}
location /check {
content_by_lua '
local session = require "resty.session".open()
ngx.say("<html><body>Session was really destroyed, you are known as ",
"<strong>",
session.data.name or "Anonymous",
"</strong>! <a href=/>Start again</a>.</body></html>")
';
}
}
lua/hello.lua
local _M = {}
function _M.greet(name)
ngx.log(ngx.ERR, "hello world here")
ngx.say("Greetings from", name)
end
function _M.debug(session)
local cjson = require "cjson"
ngx.log(ngx.ERR, "session >>", cjson.encode(session), "<<")
end
return _M