[Mod] MTStat - server monitoring over http [mtstat]

[timdorohin]

MTStat - mod providing server status (number of players, average load, max_lag, memory usage) in JSON over http
You can use it with your monitoring system, host your own back-end instance that provide web page with interactive charts or use back-end that i host at http://mtstat.us.openode.io/ - ask in topic or PM me if you want your server monitored.

Depends: nothing, but it runs on Linux-based servers only.
Source: https://github.com/timdorohin/mtstat
Download: https://github.com/timdorohin/mtstat/archive/master.zip
Back-end source: https://github.com/timdorohin/mtstat-server
License: GPLv3

Requires adding to trusted mods and installed luasocket library!

[rubenwardy]

Don't tell people to disable security, this is very very very bad and never justified. Instead, use the mod whitelisting method. Your mod already supports this, the documentation is just wrong

[timdorohin]

Don't tell people to disable security, this is very very very bad and never justified. Instead, use the mod whitelisting method. Your mod already supports this, the documentation is just wrong

Enabled mods security (mtstat added to trusted!)

Code: Select all

2018-09-14 18:31:27: ERROR[Main]: ModError: Failed to load and run script from /home/tim/.minetest/mods/mtstat/init.lua:
2018-09-14 18:31:27: ERROR[Main]: require() is disabled when mod security is on.
2018-09-14 18:31:27: ERROR[Main]: stack traceback:
2018-09-14 18:31:27: ERROR[Main]:       [C]: in function 'require'
2018-09-14 18:31:27: ERROR[Main]:       /usr/share/lua/5.1/socket.lua:10: in main chunk
2018-09-14 18:31:27: ERROR[Main]:       [C]: in function 'require'
2018-09-14 18:31:27: ERROR[Main]:       /home/tim/.minetest/mods/mtstat/init.lua:42: in main chunk
2018-09-14 18:31:27: ERROR[Main]: Check debug.txt for details.


It looks like a bug, so temporary i just disabled mod security. Yes, i know that this is bad idea, but i haven't found another workaround yet.

[rubenwardy]

You need to use the insecure environment version of require

[timdorohin]

You need to use the insecure environment version of require

Piece of my code:

Code: Select all

local insecure = minetest.request_insecure_environment()
assert(insecure, "Add mtstat mod to trusted!")

... (skipped irrelevant parts)

local socket = insecure.require('socket') -- fails there.
assert(socket, 'Disable mod security!')

UPD: found how to work around this after reading irc mod code:

Code: Select all

old_require = require            -- Hacky hack
require = insecure.require         -- Setting global require to insecure 'cause
local socket = require('socket')   -- When we try to load any lib that uses require() itself
require = old_require -- We will get errors otherwise