cat /etc/maxscale.cnf
===========================
# MaxScale documentation:
# https://mariadb.com/kb/en/mariadb-maxscale-6/

# Global parameters
#
# Complete list of configuration options:
# https://mariadb.com/kb/en/mariadb-maxscale-6-mariadb-maxscale-configuration-guide/

[maxscale]
threads=auto
admin_host            = 0.0.0.0
admin_port            = 8989
admin_enabled=true
admin_secure_gui=false

# Server definitions
#
# Set the address of the server to the network
# address of a MariaDB server.
#


[PP_MTR_MAIN_DB1]
type=server
address=172.18.96.40
port=3306
protocol=MariaDBBackend
ssl=true
ssl_cert=/opt/galera/cert/crt.maxscale.pem
ssl_key=/opt/galera/cert/key.csr.maxscale.pem
ssl_ca_cert=/opt/galera/cert/crt.ca.maxscale.pem
#max_routing_connections=13950
#persistpoolmax=13950
#persistmaxtime=10s

[PP_MTR_MAIN_DB2]
type=server
address=172.18.96.11
port=3306
protocol=MariaDBBackend
ssl=true
ssl_cert=/opt/galera/cert/crt.maxscale.pem
ssl_key=/opt/galera/cert/key.csr.maxscale.pem
ssl_ca_cert=/opt/galera/cert/crt.ca.maxscale.pem
#max_routing_connections=13950
#persistpoolmax=13950
#persistmaxtime=10s

[PP_MTR_MAIN_DB3]
type=server
address=172.18.96.37
port=3306
protocol=MariaDBBackend
ssl=true
ssl_cert=/opt/galera/cert/crt.maxscale.pem
ssl_key=/opt/galera/cert/key.csr.maxscale.pem
ssl_ca_cert=/opt/galera/cert/crt.ca.maxscale.pem
#max_routing_connections=13950
#persistpoolmax=13950
#persistmaxtime=10s


# Monitor for the servers
#
# This will keep MaxScale aware of the state of the servers.
# MariaDB Monitor documentation:
# https://mariadb.com/kb/en/maxscale-6-monitors/



[Galera-Monitor]
type=monitor
module=galeramon
servers=PP_MTR_MAIN_DB1,PP_MTR_MAIN_DB2,PP_MTR_MAIN_DB3
user=maxscaleuser
password=XXXXXXXX
monitor_interval=1000ms
disable_master_failback=true
available_when_donor=true
backend_write_timeout=3s
backend_read_timeout=3s
#disk_space_threshold=/product/:95
#disk_space_check_interval=10000ms
#maintenance_on_low_disk_space=true


# Service definitions
#
# Service Definition for a read-only service and
# a read/write splitting service.
#

# ReadConnRoute documentation:
# https://mariadb.com/kb/en/mariadb-maxscale-6-readconnroute/


[maxscalecache]
type=filter
module=cache
storage=storage_inmemory
#soft_ttl=30
#hard_ttl=45
cached_data=shared
#cached_data=thread_specific
max_size=100Mi
#selects=verify_cacheable
selects=assume_cacheable


[Galera-Service]
type=service
router=readwritesplit
enable_root_user=true
#router=readconnroute
servers=PP_MTR_MAIN_DB1,PP_MTR_MAIN_DB2,PP_MTR_MAIN_DB3
user=maxscale
password=XXXXXXXX
master_accept_reads=false
#master_reconnection=true  
#master_failure_mode=error_on_write
#transaction_replay_retry_on_deadlock=true 
#transaction_replay=true
#slave_selection_criteria=ADAPTIVE_ROUTING
filters=maxscalecache
#max_slave_connections=1
transaction_replay=true
#idle_session_pool_time=500ms
lazy_connect=false
connection_keepalive=0s
retain_last_statements=50
#max_connections = 9950 
auth_all_servers=true
#connection_timeout=1860s 


# ReadWriteSplit documentation:
# https://mariadb.com/kb/en/mariadb-maxscale-6-readwritesplit/


# Listener definitions for the services
#
# These listeners represent the ports the
# services will listen on.
#

[Galera-Listener]
address=0.0.0.0
type=listener
service=Galera-Service
protocol=MariaDBClient
port=3307
ssl=false
ssl_cert=/opt/galera/cert/crt.maxscale.pem
ssl_key=/opt/galera/cert/key.csr.maxscale.pem
ssl_ca_cert=/opt/galera/cert/crt.ca.maxscale.pem