Log rotation with logrotate

/var/log/myapp/*.log {
    daily                 # how often (daily/weekly/monthly) — or size 100M
    rotate 14             # keep 14 copies
    compress              # compress old ones (.gz)
    delaycompress         # don't compress the most recent rotated file (still being appended to)
    missingok             # fine if the log is missing
    notifempty            # don't rotate empty files
    dateext               # date suffix (file-20260101) instead of .1
    create 0640 myapp myapp   # create a new log with these permissions/owner
    su myapp myapp            # run as this user (if the directory isn't root's)
    sharedscripts             # run postrotate once for all files in the pattern
    postrotate
        systemctl reload myapp >/dev/null 2>&1 || true
    endscript
}