Roman Titov

@timvisee FYI, I've needed to do some docker builds recently and (mostly) fixed cross-compilation. WIP is on the https://github.com/qdrant/qdrant/tree/refactor-dockerfile branch, I think I'll finish with it and open a proper...

> It seems you may be able to close this with your current direction. WDYT? I think we're definitely getting closer, but from my moderate dive into Tower, it still...

Added basic tests for HTTP/2 keep-alive and IP address change. I grep Qdrant logs in these tests, which I'm not perfectly happy about, but it seemed like the most straightforward...

@agourlay Thanks! I've also quickly re-checked the logs. For some reason, once the first node is killed, the other two fail to re-elect a leader. (And, considering that the test...

So, I've tested the Dockerfile in most configurations imaginable: native and cross-comile builds on both ARM and x86 (on M1 Mac, through docker virtualization; takes ages :/), without `lld`, with...

Oh, and BTW, is _unstripped debug build for linux __900-1000 MB!?___ __UPD:__ It is. 🙈

Figured why release Docker builds failed on my Mac... it was RAM. Increased RAM limit available to Docker to 12GB and it works now. Didn't note the build time (before...

Rebased to current `dev`. All speedups from #1856 and #1859 present. Here's a comparison between "cold" builds. Left is this PR (aca7221, [CI link][refactor-cold-build]), right is #1859 (d0933e5, [CI link][1859-cold-build])....

Rebased on recent `dev`.

@generall I'll verify all of these once again (a bit) later, but unless something got accidentally broken recently, __all__ of them should be good.