Connections sent only to master - Source

Revision: 115201
User: Prébagarane Louvois
Date: 2022-04-15 09:49

Hello,

I have installed :
* 1 VM maxscale (RHEL 8.5 = maxscale-6.2.1-1.rhel.8.x86_64)
* and 3 mariadb galera cluster VM: (RHEL 8.5 = MariaDB-server-10.5.13-1.el8.x86_64)

**maxscale configuration**
{{{
[maxscale]
threads=auto

[synboxsql1]
type=server
address=10.222.50.26
port=3306
protocol=MariaDBBackend

[synboxsql2]
type=server
address=10.222.50.27
port=3306
protocol=MariaDBBackend

[synboxsql3]
type=server
address=10.222.50.28
port=3306
protocol=MariaDBBackend

[MariaDB-Monitor]
type=monitor
module=mariadbmon
servers=synboxsql1,synboxsql2,synboxsql3
user=maxscale
password=xxxx
monitor_interval=1000

[Read-Write-Service]
type=service
router=readwritesplit
servers=synboxsql1,synboxsql2,synboxsql3
user=maxscale
password=xxx

[Read-Write-Listener]
type=listener
address=10.222.50.30
service=Read-Write-Service
protocol=MariaDBClient
port=3306
}}}

**mariadb cluster configuration on each mariadb server**
{{{
[galera]
wsrep_on=ON
wsrep_provider           = /usr/lib64/galera-4/libgalera_smm.so
wsrep_cluster_address    = gcomm://10.222.50.26,10.222.50.27,10.222.50.28
binlog_format=  ROW
innodb_autoinc_lock_mode = 2
default_storage_engine=InnoDB
wsrep_cluster_name       = SYNBOX
}}}

**My Question ?**

Everything seems working fine. 
But i don't know why, ony the first mariadb server is used.

{{{
[root@synboxmaxscale2 ~]# maxctrl list servers
┌────────────┬──────────────┬──────┬─────────────┬─────────────────┬──────┐
│ Server     │ Address      │ Port │ Connections │ State           │ GTID │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql1 │ 10.222.50.26 │ 3306 │ 3           │ Master, Running │      │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql2 │ 10.222.50.27 │ 3306 │ 0           │ Running         │      │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql3 │ 10.222.50.28 │ 3306 │ 0           │ Running         │      │
└────────────┴──────────────┴──────┴─────────────┴─────────────────┴──────┘
[root@synboxmaxscale2 ~]# maxctrl list servers
┌────────────┬──────────────┬──────┬─────────────┬─────────────────┬──────┐
│ Server     │ Address      │ Port │ Connections │ State           │ GTID │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql1 │ 10.222.50.26 │ 3306 │ 4           │ Master, Running │      │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql2 │ 10.222.50.27 │ 3306 │ 0           │ Running         │      │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql3 │ 10.222.50.28 │ 3306 │ 0           │ Running         │      │
└────────────┴──────────────┴──────┴─────────────┴─────────────────┴──────┘
[root@synboxmaxscale2 ~]# maxctrl list servers
┌────────────┬──────────────┬──────┬─────────────┬─────────────────┬──────┐
│ Server     │ Address      │ Port │ Connections │ State           │ GTID │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql1 │ 10.222.50.26 │ 3306 │ 3           │ Master, Running │      │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql2 │ 10.222.50.27 │ 3306 │ 0           │ Running         │      │
├────────────┼──────────────┼──────┼─────────────┼─────────────────┼──────┤
│ synboxsql3 │ 10.222.50.28 │ 3306 │ 0           │ Running         │      │
└────────────┴──────────────┴──────┴─────────────┴─────────────────┴──────┘
}}}

Thank for your help
regards,
Prebag

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Connections sent only to master - Source

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