{
  "exec-opts": ["native.cgroupdriver=systemd"],
  "log-driver": "json-file",
  "log-opts": {
    "max-size": "100m"
  },
  "storage-driver": "overlay2"
}

MariaDB [(none)]> SHOW STATUS LIKE 'wsrep_local_state_comment';
+---------------------------+--------+
| Variable_name             | Value  |
+---------------------------+--------+
| wsrep_local_state_comment | Synced |
+---------------------------+--------+
1 row in set (0.012 sec)

# cat /var/lib/mysql/grastate.dat
# GALERA saved state
version: 2.1
uuid:    00000000-0000-0000-0000-000000000000
seqno:   -1
safe_to_bootstrap: 0

sudo cat  /var/lib/mysql/grastate.dat
# GALERA saved state
version: 2.1
uuid:    f5d6fbc2-31ab-11eb-8a0a-736512fe0cbd
seqno:   11067
safe_to_bootstrap: 0

sudo service mysql stop

sudo galera_new_cluster

sudo service mysql start

$ sudo mysql -p -e "SHOW STATUS LIKE 'wsrep_cluster_size';"
Enter password: 
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| wsrep_cluster_size | 3     |
+--------------------+-------+

$ORIGIN tt.testing.
@    3600   IN      SOA     ns.tt.testing. root.tt.testing. (
                              5         ; serial
                         604800         ; refresh
                          86400         ; retry
                        2419200         ; expire
                          36000         ; minimum
              )

; Name Server Information
_etcd-server-ssl._tcp.test1.tt.testing. IN SRV 10 10 2380 test1-etcd-0.tt.testing.
test1-api     IN      A       192.168.0.23

cat Corefile
(global) {
    log
    errors
    cache 86400 {
      prefetch 5 10m 10%
    }
    dnssec
    loadbalance
    prometheus :9153
  }

tt.testing:53 {
  log
  errors
  file zones/test1-api
}


.:53 {
    import global
    forward . 192.168.0.15:53 {
    health_check 10s
    except tt.testing
  }   
}

$ nslookup test1-api.tt.testing -port=8533
Server:   192.168.0.15
Address:  192.168.0.15#8533

Name: test1-api.tt.testing
Address: 192.168.0.23