Hi Willy. Am 23.10.2018 um 10:55 schrieb Willy Tarreau: > Hi Aleks, > > On Tue, Oct 23, 2018 at 10:23:43AM +0200, Aleksandar Lazic wrote: >>> I'm not sure what you mean because the basic stuff (http actions, fetching >>> samples, ACLs etc) will be OK. What will definitely not be ready will be to >>> have a TCP frontend connecting to an HTTP backend, "tcp-request content" >>> rules processing HTTP elements, Lua, etc. >> >> Will be h2c possible, as some gRPC server starts with HTTP not HTTPS? > > We don't have the H1-to-H2 upgrade at the moment, but 1.9 will support H2 > without TLS (just specify "proto h2" on the "bind" or "server" lines).
Ah that's a important Information, especially the possibility of the server line ;-). >>>> It could be that my expectation is unrealistic and lb software doesn't >>>> need to >>>> take any decisions based on those verbs/nouns. >>> >>> I don't know what is needed, but I definitely expect that at least this >>> should work :-) >> >> I think also but what I have seen out there is hat 'Te: trailers' could be a >> challenge, as this blog entry describes. >> >> https://nghttp2.org/blog/2015/03/24/proxying-grpc-with-nghttpx/ >> >> I'm not sure if haproxy can handle this. > > No we don't have trailers in H2 for now. However the good news is that > it's not because it's that difficult to implement, it's only because > nothing at all ever used them for 2 decades... until gRPC apparently > decided that they deserved more love. So I'm quite confident that we > could have trailers support not too long after 1.9. Thanks for pointing > this, this definitely helps! By the way, Tatsuhiro mentions H1 to H2 > proxying in the article above, that's definitely something that should > work as well with haproxy with the new native internal representation. Yeah what are 2 decades Years in IT ;-) > H1 to H2 That's really cool ;-) So the mux matrix will look like this. X = Frontend Protocol Y = Backend Protocol H1 H2 H1S H2S TCP TCPS H1 x x x x x x H2 x x x x x x H1S x x x x x x H2S x x x x x x TCP x x x x x x TCPS x x x x x x In summary every combination is possible. > Cheers, > Willy Regards Aleks
