Comments - MaxScale, "No Master can be determined"

module=galeramon was in comments in maxscale.cnf.

Trying to copy paste again:

[maxscale]
threads=auto
log_trace=1

[server1]
type=server
address=172.17.0.3
port=3306
protocol=MariaDBBackend

[server2]
type=server
address=172.17.0.4
port=3306
protocol=MariaDBBackend

[server3]
type=server
address=172.17.0.5
port=3306
protocol=MariaDBBackend

[WriteService]
type=service
router=readconnroute
router_options=master
servers=server1,server2,server3
user=maxscale
passwd=paswd

[ReadService]
type=service
router=readconnroute
router_options=slave
servers=server1,server2,server3
user=maxscale
passwd=paswd

[WriteListener]
type=listener
service=WriteService
protocol=MariaDBClient
port=4306
## socket=/tmp/ClusterMaster

[ReadListener]
type=listener
service=ReadService
protocol=MariaDBClient
#protocol=MySQLClient
port=4307

[ReplicationMonitor]
type=monitor
module=mariadbmon
servers=server1,server2,server3
user=maxscale
passwd=paswd
monitor_interval=1000

[CLI]
type=service
router=cli

[CLIListener]
type=listener
service=CLI
protocol=maxscaled
socket=default

All grants were tried to be given. When maxscale is started, the error appears, "No Master can be determined".

systemctl status maxscale
● maxscale.service - MariaDB MaxScale Database Proxy
   Loaded: loaded (/lib/systemd/system/maxscale.service; disabled; vendor preset: enabled)
   Active: active (running) since to 2018-10-18 07:59:45 EEST; 6s ago
  Process: 8512 ExecStart=/usr/bin/maxscale (code=exited, status=0/SUCCESS)
  Process: 8508 ExecStartPre=/usr/bin/install -d /var/run/maxscale -o maxscale -g maxscale (code=exited, status=0/SUCCESS)
 Main PID: 8516 (maxscale)
    Tasks: 9
   Memory: 6.6M
      CPU: 144ms
   CGroup: /system.slice/maxscale.service
           └─8516 /usr/bin/maxscale

loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('cm', '172.17.0.2', NULL, 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '127.0.0.1', NULL, 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '127.0.0.%', NULL, 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('cm', '127.0.0.1', NULL, 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '<laptop_ip>', NULL, 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('myuser', '172.17.0.2', 'mysql', 0, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '172.17.0.2', 'mysql', 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '127.0.0.1', 'mysql', 1, '...
loka 18 07:59:45 mycomputer maxscale[8516]: [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '<laptop_ip>', 'mysql', 1, '
loka 18 07:59:45 mycomputer maxscale[8516]: [mariadbmon] No Master can be determined   

Following grants were given:

grant all privileges on *.* to 'maxscale'@'127.0.0.1' with grant option;

grant all privileges on *.* to 'maxscale'@'<laptop_ip>' with grant option;

In logs, maxscale otherwise starts up:

2018-10-18 07:59:45   info   : [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '127.0.0.1', 'mysql', 1, '4ACFE3202A5FF5CF467898FC58AAB1D615029441')
2018-10-18 07:59:45   info   : [MySQLAuth] Added user: INSERT OR REPLACE INTO mysqlauth_users VALUES ('maxscale', '10.144.114.162', 'mysql', 1, '4ACFE3202A5FF5CF467898FC58AAB1D615029441')
2018-10-18 07:59:45   notice : [MySQLAuth] [ReadService] Loaded 15 MySQL users for listener ReadListener.
2018-10-18 07:59:45   notice : Listening for connections at [::]:4307 with protocol MySQL
2018-10-18 07:59:45   info   : Started session [2] for ReadService service 
2018-10-18 07:59:45   notice : Service 'ReadService' started (2/3)
2018-10-18 07:59:45   notice : Listening for connections at [/tmp/maxadmin.sock]:0 with protocol MaxScale Admin
2018-10-18 07:59:45   info   : Started session [3] for CLI service 
2018-10-18 07:59:45   notice : Service 'CLI' started (3/3)
2018-10-18 07:59:45   notice : Started MaxScale log flusher.
2018-10-18 07:59:45   info   : [qc_sqlite] In-memory sqlite database successfully opened for thread 140506755454720.
2018-10-18 07:59:45   info   : [qc_sqlite] In-memory sqlite database successfully opened for thread 140506747062016.
2018-10-18 07:59:45   notice : Started REST API on [127.0.0.1]:8989
2018-10-18 07:59:45   info   : [qc_sqlite] In-memory sqlite database successfully opened for thread 140506730276608.
2018-10-18 07:59:45   info   : [qc_sqlite] In-memory sqlite database successfully opened for thread 140506738669312.
2018-10-18 07:59:45   notice : MaxScale started with 4 worker threads, each with a stack size of 8388608 bytes.

In other window: No Master can be determined

Tried to set as master, but it did not help.

MaxScale> set server server1 master

in logs:

2018-10-18 08:09:36   info   : (4) [cli] MaxAdmin: set server server1 master
2018-10-18 08:09:36   notice : Server changed state: server1[172.17.0.3:3306]: lost_master. [Master, Running] -> [Running]

All servers are in Running state (not as master / slave states):

MaxScale> list servers
Servers.
-------------------+-----------------+-------+-------------+--------------------
Server             | Address         | Port  | Connections | Status              
-------------------+-----------------+-------+-------------+--------------------
server1            | 172.17.0.3      |  3306 |           0 | Running
server2            | 172.17.0.4      |  3306 |           0 | Running
server3            | 172.17.0.5      |  3306 |           0 | Running
-------------------+-----------------+-------+-------------+--------------------

Same happens also with readwritesplit.

Is it a Galera cluster or a cluster with master-slave replication?

Hi! It is not galera cluster. It is MaxScale with Master Slave Slave (M-S-S) configuration. (M-S would be enough too.) I have tried with readwritesplit and readconnroute. There may be something basic missing. Grants given incorrectly? Something else missing / not executed?