On Sun, 01 Mar 2015 17:34:36 +0100 Aleksandar Lazic <al-hapr...@none.at> wrote:
> Dear Thierry. > > Cool work ;-) > > Am 01-03-2015 13:47, schrieb Thierry FOURNIER: > > Hi everyone, > > > > Thanks Willy for the introduction. > > > > I join the first part of the document. All the function are not yet > > available. The doc uses a markdown format like that uses GitHub. I join > > the original format, and the HTML conversion. > > > > The next steps are: > > - collecting users ideas and bug reports, > > - add missing functions like native header manipulations, > > - check the usage of existing libraries, > > - change the 'sleep' engine, > > - add execution timeout to prevent infinite loops, > > - some other tasks ... > > [snipp] > > I assume you know the lua module for nginx which is also fully non > blocking > > https://github.com/openresty/lua-nginx-module > > What I like in this module is the deep integration into nginx. > > Maybe it would be possible to integrate lua-scripting into the check > agent framework? Hi, thank you. It is certainly possible. Have you some concrete usage case ? > <crazy-idea> > inject lua code over contorl socket ;-) > </crazy-idea> It is technicaly possible. I'm not sure that it is useful for other thing than development. For now, the tag <crazy-idea> is welcome :) Thierry > > enjoy > > Thierry > > br Aleks > > > > On Sat, 28 Feb 2015 23:33:56 +0100 > > Willy Tarreau <w...@1wt.eu> wrote: > > > >> Hi folks, > >> > >> this is just a quick mail to let you know that I've just merged the > >> recent > >> work from my coworker Thierry Fournier (in Cc) about supporting Lua > >> scripting > >> in haproxy. I won't go into lengths explaining how that's supposed to > >> be used > >> because I don't really know myself, but I'll let him provide some > >> explanations > >> and working examples. The real purpose would be to get some feedback, > >> suggestions, criticisms to get further into this. > >> > >> At the moment it is possible to declare some Lua-based sample fetch > >> functions, > >> some converters as well and even to create new tcp-request and > >> http-req/resp > >> actions. These last ones (the actions) support yielding so that it is > >> possible > >> to make blocking calls from the Lua code and benefit from haproxy's > >> native > >> session management and scheduling to switch to something else while > >> things > >> are making progress. Thus the whole system is totally non-blocking and > >> event-driven, even if in Lua you appear to be blocking. > >> > >> The long term goal is to be able to quickly provide some features that > >> are > >> not yet possible natively, and eventually to implement some of them > >> natively > >> if they're often requested or have a performance impact. Some of the > >> most > >> complex parts such as writing authentication systems relying on > >> side-traffic > >> would possibly remain written in Lua only, except if we manage to see > >> a big > >> use of certain things and we see a way to implement them cleanly. > >> > >> Thierry is busy these days, and that's why I asked him to push his > >> code > >> prior to switching to other tasks despite the doc not being there yet. > >> So > >> it's possible we'll have to wait a bit for some doc, but we'll really > >> value > >> testing, bug reports and feedback. Nothing is set in stone yet, he > >> does have > >> some ideas on how to improve things. I do still have some concerns > >> about > >> long-term stability and resource usage, as you can expect. So use it > >> as a > >> toy first, play with it and tell us if you like it or not, and if not, > >> why. > >> > >> Thanks! > >> Willy > >> > >> >
