sudo mariadb-backup --backup -utest_user -p*****--target-dir b01

sudo systemctl stop mariadb.service

 sudo rm -rf /var/lib/mysql

sudo mariadb-backup --prepare --target-dir b01

sudo mariadb-backup --copy-back --target-dir b01

 sudo chown mysql:mysql -R /var/lib/mysql

 sudo systemctl start mariadb.service

[vagrant@build ~]$ sudo systemctl restart mariadb.service

Job for mariadb.service failed because the control process exited with error code.

See "systemctl status mariadb.service" and "journalctl -xe" for details.

[vagrant@build ~]$ systemctl status mariadb.service

● mariadb.service - MariaDB 10.4.27-18 database server

   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; disabled; vendor preset: disabled)

  Drop-In: /etc/systemd/system/mariadb.service.d

           └─migrated-from-my.cnf-settings.conf

   Active: failed (Result: exit-code) since Wed 2022-11-30 15:01:44 CET; 1s ago

     Docs: man:mysqld(8)

           https://mariadb.com/kb/en/library/systemd/

  Process: 20670 ExecStartPost=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)

  Process: 21116 ExecStart=/usr/sbin/mysqld $MYSQLD_OPTS $_WSREP_NEW_CLUSTER $_WSREP_START_POSITION (code=exited, status=1/FAILURE)

  Process: 21016 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= ||   VAR=`cd /usr/bin/..; /usr/bin/galera_recovery`; [ $? -eq 0 ]   && systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1 (code=exited, status=0/SUCCESS)

  Process: 21014 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)

 Main PID: 21116 (code=exited, status=1/FAILURE)

   Status: "MariaDB server is down"

[vagrant@build ~]$ sudo setenforce 0

[vagrant@build ~]$ sudo systemctl restart mariadb.service

[vagrant@build ~]$ systemctl status mariadb.service

● mariadb.service - MariaDB 10.4.27-18 database server

   Loaded: loaded (/usr/lib/systemd/system/mariadb.service; disabled; vendor preset: disabled)

  Drop-In: /etc/systemd/system/mariadb.service.d

           └─migrated-from-my.cnf-settings.conf

   Active: active (running) since Wed 2022-11-30 15:04:03 CET; 4s ago

     Docs: man:mysqld(8)

           https://mariadb.com/kb/en/library/systemd/

  Process: 21487 ExecStartPost=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)

  Process: 21318 ExecStartPre=/bin/sh -c [ ! -e /usr/bin/galera_recovery ] && VAR= ||   VAR=`cd /usr/bin/..; /usr/bin/galera_recovery`; [ $? -eq 0 ]   && systemctl set-environment _WSREP_START_POSITION=$VAR || exit 1 (code=exited, status=0/SUCCESS)

  Process: 21316 ExecStartPre=/bin/sh -c systemctl unset-environment _WSREP_START_POSITION (code=exited, status=0/SUCCESS)

 Main PID: 21418 (mysqld)

   Status: "Taking your SQL requests now..."

    Tasks: 38 (limit: 49492)

   Memory: 74.2M

   CGroup: /system.slice/mariadb.service

           └─21418 /usr/sbin/mysqld