Hey, thanks for mentioning rand, I didn't know about it... With some rand()s I was able to generate a UUID, I'll have to do some performance checks, but I think it will be fair enough. Then we don't need a %uuid or similar from my point of view.
Thanks, Luca On 03.09.19, 10:34, "li...@ltri.eu on behalf of Lukas Tribus" <li...@ltri.eu> wrote: Hello Luca, On Tue, 3 Sep 2019 at 09:18, Schimweg, Luca <luca.schim...@sap.com> wrote: > > Hey, > > > > for one use case I have, I would need a variable like %uuid in log-formats, > which just generates a random UUID. The use-case would be, to be able > to set the unique-id-format to this uuid, so that we can have a random uuid > set as request-id for any incoming request. Right now, it’s quite difficult to > get a random and unique request-id, the random uuid approach would > definitely help with that. I assume the rand  does not suffice. In this case, I'd suggest to use LUA for this, maybe by using some library like lua-resty-jit-uuid . Lukas  https://cbonte.github.io/haproxy-dconv/1.9/configuration.html#7.3.2-rand  https://github.com/thibaultcha/lua-resty-jit-uuid