The new logrotate settings assume that dragonfly closes a log file
once it grows to large. It never rotates file that is currently open for writing.
Specifically logrotate:
1. rotate only log files
2. skip those that are currently open by as process.
3. compresses using zstd which is more cpu efficient than gzip
4. does not truncate/create old files as 0-sized blobs - just renames them
Fixes#1935
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
1. Tune some security directives.
2. Fix the flags file that mistakenly configured dragonfly to store its dump files into /run (tmpfs).
Signed-off-by: Roman Gershman <roman@dragonflydb.io>
