Check_MK: Backup and Restore

What happens at Backup & Restore

The following files and directories go into your backup - and will be replaced completely by a restore:

• the main configuration file (main.mk)
• the final configuration file final.mk, if present
• all files in your configuration subdirectory conf.d, if present
• automatically inventorized checks (usually /var/lib/check_mk/autochecks)
• current performance counters (usually /var/lib/check_mk/counters)
• stored logfiles of logwatch (usually /var/lib/check_mk/logwatch)
• cached files from the agents (usually /var/lib/check_mk/cache)

REF: https://mathias-kettner.de/checkmk_backup.html