logrotate setting file for HashiCorp's Vault audit file

vault_logrotate

# Change the path below to your own audit log path.
/var/log/vault/audit.log {
  rotate 30
  daily
  # Do not execute rotate if the log file is empty.
  notifempty
  missingok
  compress
  # Set compress on next rotate cycl to prevent entry loss when performing compression.
  delaycompress
  postrotate
    # If you do not use systemctl. you can send SIGHUP to vault's process to achieve same goal.
    /usr/bin/systemctl reload vault 2> /dev/null || true
  endscript
  extension log
  dateext
  dateformat %Y-%m-%d.
}

# Use this setting, your audit folder will like
# .
# ├── audit.2018-09-10.log.gz
# ├── audit.2018-09-11.log
# └── audit.log