Fixes#2243
These tests rely on some kind of sync between readers and writers, as if
circular buffer is overrun, test no longer runs as expected.
We use time-sensitive rate limiter to limit write speed to make sure
readers can always catch up. Lowering the rate should slow down writers
and make tests more likely to succeed.
For #2243, the failure was from buffer overrun: when overrun is
detected, `Watch` function closes the channel (and test "receives" zero
element).
Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
This replaces logging to files with inotify following to pure in-memory
circular buffer which grows on demand capped at specified maximum
capacity.
The concern with previous approach was that logs on tmpfs were growing
without any bound potentially consuming all the node memory.
Signed-off-by: Andrey Smirnov <smirnov.andrey@gmail.com>
