我正在尝试连接到Azure中的MariaDB TX 2.0群集，但它不起作用。 我在配置步骤中创建了一个公共负载均衡器，部署后我获得了一个 IP 地址和一个主机名。
例
mymariadb.westus.cloudapp.azure.com
MySQL 连接字符串：
mysql -h mymariadb.westus.cloudapp.azure.com -P 4006 -u myapp -pmypassword mydb
我收到此错误：
mysql: [Warning] Using a password on the command line interface can be insecure.
**ERROR 2003 (HY000): Can't connect to MySQL server on 'mymariadb.westus.cloudapp.azure.com' (110)**
知道为什么我无法连接到 MariaDB 集群吗？
我还尝试连接到其中一个 maxscaller，然后从那里连接到一个数据库服务器 ->这有效。
谢谢！
更新：
谢谢你的帖子。 首先，我无法运行maxadmin：
Unable to connect to MaxScale at /tmp/maxadmin.sock: No such file or directory
我检查了日志，注意到侦听器有问题
2018-05-15 20:18:03 error : Creation of listener 'Read-Connection-Listener' for service 'Read Connection Router' failed, because both 'socket' and 'port' are defined. Only either one is allowed.
2018-05-15 20:18:03 error : Creation of listener 'Write-Connection-Listener' for service 'Write Connection Router' failed, because both 'socket' and 'port' are defined. Only either one is allowed.
2018-05-15 20:18:03 error : Creation of listener 'RW-Split-Listener' for service 'RW Split Router' failed, because both 'socket' and 'port' are defined. Only either one is allowed.
还可以找到这个：
2018-05-15 20:18:03 warning: Protocol module 'mysqlbackend' has been deprecated, use 'mariadbbackend' instead.
希望您(作为MariaDB专家(可以帮助我解决这个问题！
谢谢和问候！
更新 2
这是我的 cnf 文件(我没有进行任何更改(。这应该是正确的并且有效，对吧？
[CLI]
type=service
router=cli
[RW Split Listener]
type=listener
service=RW Split Router
protocol=MySQLClient
port=4006
socket=/var/lib/maxscale/rwsplit.sock
[Write Connection Listener]
type=listener
service=Write Connection Router
protocol=MySQLClient
port=4007
socket=/var/lib/maxscale/writeconn.sock
[Read Connection Listener]
type=listener
service=Read Connection Router
protocol=MySQLClient
port=4008
socket=/var/lib/maxscale/readconn.sock
[CLI Listener]
type=listener
service=CLI
protocol=maxscaled
socket=/tmp/maxadmin.sock
[MaxInfo]
type=service
router=maxinfo
[MaxInfo JSON Listener]
type=listener
service=MaxInfo
protocol=HTTPD
port=8003
address=localhost
[db1]
type=server
address=172.16.4.4
port=3306
protocol=MySQLBackend
[db2]
type=server
address=172.16.4.5
port=3306
protocol=MySQLBackend
[db3]
type=server
address=172.16.4.6
port=3306
protocol=MySQLBackend
更新 3：
我进行了您建议的更改并尝试使用 maxadmin 命令：
2018-05-18 07:12:58 error : Creation of listener 'Read-Connection-Listener' for service 'Read Connection Router' failed, because both 'socket' and 'port' are defined. Only either one is allowed.
2018-05-18 07:12:58 error : Creation of listener 'Write-Connection-Listener' for service 'Write Connection Router' failed, because both 'socket' and 'port' are defined. Only either one is allowed.
2018-05-18 07:12:58 error : Creation of listener 'RW-Split-Listener' for service 'RW Split Router' failed, because both 'socket' and 'port' are defined. Only either one is allowed.
2018-05-18 07:12:58 notice : Monitor 'Galera-Monitor' is missing the 'journal_max_age' parameter, using default value of 28800 seconds.
2018-05-18 07:12:58 notice : Monitor 'Galera-Monitor' is missing the 'script_timeout' parameter, using default value of 90 seconds.
2018-05-18 07:12:58 error : 3 errors were encountered while processing the configuration file '/etc/maxscale.cnf'.
2018-05-18 07:12:58 error : Failed to open, read or process the MaxScale configuration file /etc/maxscale.cnf. Exiting.
2018-05-18 07:12:58 MariaDB MaxScale is shut down.
----------------------------------------------------
me@mdbec-max1:~$ maxadmin
Unable to connect to MaxScale at /tmp/maxadmin.sock: No such file or directory
更新 4
[maxscale]
threads=4
datadir=/var/lib/maxscale/data/
#[MySQL Monitor]
#type=monitor
#module=mysqlmon
#servers=server1,server2,server3
#user=myuser
#passwd=mypwd
#monitor_interval=10000
#backend_connect_timeout=
#backend_read_timeout=
#backend_write_timeout=
#detect_replication_lag=
#detect_stale_master=
[Galera Monitor]
type=monitor
module=galeramon
servers=db1,db2,db3
user=maxscalemonitor
passwd=I-DELETE-THIS-LINE
monitor_interval=1000
#disable_master_failback=
[qla]
type=filter
module=qlafilter
filebase=/tmp/QueryLog
[fetch]
type=filter
module=regexfilter
match=fetch
replace=select
[hint]
type=filter
module=hintfilter
[Write Connection Router]
type=service
router=readconnroute
servers=db1,db2,db3
user=maxscalemonitor
passwd=I-DELETE-THIS-LINE
router_options=master
localhost_match_wildcard_host=1
version_string=10.2.14-MariaDB Cluster
[Read Connection Router]
type=service
router=readconnroute
servers=db1,db2,db3
user=maxscalemonitor
passwd=I-DELETE-THIS-LINE
router_options=synced
localhost_match_wildcard_host=1
version_string=10.2.14-MariaDB Cluster
[RW Split Router]
type=service
router=readwritesplit
servers=db1,db2,db3
user=maxscalemonitor
passwd=I-DELETE-THIS-LINE
max_slave_connections=100%
localhost_match_wildcard_host=1
version_string=10.2.14-MariaDB Cluster
router_options=disable_sescmd_history=true
#use_sql_variables_in=master
#max_slave_replication_lag=21
#filters=hint|fetch|qla
#router_options=slave_selection_criteria=LEAST_CURRENT_OPERATIONS
[CLI]
type=service
router=cli
[RW Split Listener]
type=listener
service=RW Split Router
protocol=MySQLClient
port=4006
socket=/var/lib/maxscale/rwsplit.sock
[Write Connection Listener]
type=listener
service=Write Connection Router
protocol=MySQLClient
port=4007
socket=/var/lib/maxscale/writeconn.sock
[Read Connection Listener]
type=listener
service=Read Connection Router
protocol=MySQLClient
port=4008
socket=/var/lib/maxscale/readconn.sock
[CLI Listener]
type=listener
service=CLI
protocol=maxscaled
socket=/tmp/maxadmin.sock
[MaxInfo]
type=service
router=maxinfo
[MaxInfo JSON Listener]
type=listener
service=MaxInfo
protocol=HTTPD
port=8003
address=localhost
[CLIUnixListener]
type=listener
service=CLI
protocol=maxscaled
socket=default
[CLIInetListener]
type=listener
service=CLI
protocol=maxscaled
address=localhost
port=6603
[db1]
type=server
address=172.16.4.4
port=3306
protocol=MySQLBackend
[db2]
type=server
address=172.16.4.5
port=3306
protocol=MySQLBackend
[db3]
type=server
address=172.16.4.6
port=3306
protocol=MySQLBackend
Sokolata，
我发现了您的配置的问题。请从侦听器的代码段中删除端口或套接字。如果要为网络侦听器提供一个端口，为本地主机连接提供一个套接字，则需要创建单独的代码段。下面，我对您的配置进行了一些调整以适应我的实验室，它的工作原理如下所示：
maxscale.cnf
[maxscale]
threads=4
#datadir=/var/lib/maxscale/data/
[Galera Monitor]
type=monitor
module=galeramon
servers=db1,db2,db3
user=maxmon
passwd=2C894F278CEC5B974966EC969E006E37
monitor_interval=1000
[qla]
type=filter
module=qlafilter
filebase=/tmp/QueryLog
[fetch]
type=filter
module=regexfilter
match=fetch
replace=select
[hint]
type=filter
module=hintfilter
[Write Connection Router]
type=service
router=readconnroute
servers=db1,db2,db3
user=maxusr
passwd=2C894F278CEC5B974966EC969E006E37
router_options=master
localhost_match_wildcard_host=1
version_string=10.2.14-MariaDB Cluster
[Read Connection Router]
type=service
router=readconnroute
servers=db1,db2,db3
user=maxusr
passwd=2C894F278CEC5B974966EC969E006E37
router_options=synced
localhost_match_wildcard_host=1
version_string=10.2.14-MariaDB Cluster
[RW Split Router]
type=service
router=readwritesplit
servers=db1,db2,db3
user=maxusr
passwd=2C894F278CEC5B974966EC969E006E37
max_slave_connections=100%
localhost_match_wildcard_host=1
version_string=10.2.14-MariaDB Cluster
router_options=disable_sescmd_history=true
[CLI]
type=service
router=cli
[RW Split Listener]
type=listener
service=RW Split Router
protocol=MySQLClient
port=4006
#socket=/var/lib/maxscale/rwsplit.sock
[Write Connection Listener]
type=listener
service=Write Connection Router
protocol=MySQLClient
port=4007
#socket=/var/lib/maxscale/writeconn.sock
[Read Connection Listener]
type=listener
service=Read Connection Router
protocol=MySQLClient
port=4008
#socket=/var/lib/maxscale/readconn.sock
[CLI Listener]
type=listener
service=CLI
protocol=maxscaled
socket=/tmp/maxadmin.sock
[CLIUnixListener]
type=listener
service=CLI
protocol=maxscaled
socket=default
[CLIInetListener]
type=listener
service=CLI
protocol=maxscaled
address=localhost
port=6603
[db1]
type=server
address=10.136.85.157
port=3306
protocol=MySQLBackend
[db2]
type=server
address=10.136.87.40
port=3306
protocol=MySQLBackend
[db3]
type=server
address=10.136.80.203
port=3306
protocol=MySQLBackend
最大比例.log
MariaDB MaxScale /var/log/maxscale/maxscale.log Sun May 20 13:30:49 2018
----------------------------------------------------------------------------
2018-05-20 13:30:49 notice : Working directory: /var/log/maxscale
2018-05-20 13:30:49 notice : The collection of SQLite memory allocation statistics turned off.
2018-05-20 13:30:49 notice : Threading mode of SQLite set to Multi-thread.
2018-05-20 13:30:49 notice : MariaDB MaxScale 2.2.5 started
2018-05-20 13:30:49 notice : MaxScale is running in process 24042
2018-05-20 13:30:49 notice : Configuration file: /root/maxscale/configs/test.cnf
2018-05-20 13:30:49 notice : Log directory: /var/log/maxscale
2018-05-20 13:30:49 notice : Data directory: /var/lib/maxscale
2018-05-20 13:30:49 notice : Module directory: /usr/lib64/maxscale
2018-05-20 13:30:49 notice : Service cache: /var/cache/maxscale
2018-05-20 13:30:49 notice : Loading /root/maxscale/configs/test.cnf.
2018-05-20 13:30:49 warning: Number of threads set to 4, which is greater than the number of processors available: 1
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: Galera Monitor
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: Write Connection Router
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: Read Connection Router
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: RW Split Router
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: RW Split Listener
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: Write Connection Listener
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: Read Connection Listener
2018-05-20 13:30:49 warning: Whitespace in object names is deprecated, converting to hyphens: CLI Listener
2018-05-20 13:30:49 notice : /root/maxscale/configs/test.cnf.d does not exist, not reading.
2018-05-20 13:30:49 notice : [cli] Initialise CLI router module
2018-05-20 13:30:49 notice : Loaded module cli: V1.0.0 from /usr/lib64/maxscale/libcli.so
2018-05-20 13:30:49 notice : [readwritesplit] Initializing statement-based read/write split router module.
2018-05-20 13:30:49 notice : Loaded module readwritesplit: V1.1.0 from /usr/lib64/maxscale/libreadwritesplit.so
2018-05-20 13:30:49 notice : [readconnroute] Initialise readconnroute router module.
2018-05-20 13:30:49 notice : Loaded module readconnroute: V1.1.0 from /usr/lib64/maxscale/libreadconnroute.so
2018-05-20 13:30:49 notice : Loaded module hintfilter: V1.0.0 from /usr/lib64/maxscale/libhintfilter.so
2018-05-20 13:30:49 notice : Loaded module regexfilter: V1.1.0 from /usr/lib64/maxscale/libregexfilter.so
2018-05-20 13:30:49 notice : Loaded module qlafilter: V1.1.1 from /usr/lib64/maxscale/libqlafilter.so
2018-05-20 13:30:49 notice : [galeramon] Initialise the MySQL Galera Monitor module.
2018-05-20 13:30:49 notice : Loaded module galeramon: V2.0.0 from /usr/lib64/maxscale/libgaleramon.so
2018-05-20 13:30:49 warning: Protocol module 'mysqlbackend' has been deprecated, use 'mariadbbackend' instead.
2018-05-20 13:30:49 notice : Loaded module mariadbbackend: V2.0.0 from /usr/lib64/maxscale/libmariadbbackend.so
2018-05-20 13:30:49 notice : Loaded module MySQLBackendAuth: V1.0.0 from /usr/lib64/maxscale/libmysqlbackendauth.so
2018-05-20 13:30:49 notice : Loaded module maxscaled: V2.0.0 from /usr/lib64/maxscale/libmaxscaled.so
2018-05-20 13:30:49 notice : Loaded module MaxAdminAuth: V2.1.0 from /usr/lib64/maxscale/libmaxadminauth.so
2018-05-20 13:30:49 warning: Protocol module 'mysqlclient' has been deprecated, use 'mariadbclient' instead.
2018-05-20 13:30:49 notice : Loaded module mariadbclient: V1.1.0 from /usr/lib64/maxscale/libmariadbclient.so
2018-05-20 13:30:49 notice : Loaded module MySQLAuth: V1.1.0 from /usr/lib64/maxscale/libmysqlauth.so
2018-05-20 13:30:49 notice : Monitor 'Galera-Monitor' is missing the 'journal_max_age' parameter, using default value of 28800 seconds.
2018-05-20 13:30:49 notice : Monitor 'Galera-Monitor' is missing the 'script_timeout' parameter, using default value of 90 seconds.
2018-05-20 13:30:49 notice : No query classifier specified, using default 'qc_sqlite'.
2018-05-20 13:30:49 notice : Loaded module qc_sqlite: V1.0.0 from /usr/lib64/maxscale/libqc_sqlite.so
2018-05-20 13:30:49 warning: Removing stale journal file for monitor 'Galera-Monitor'.
2018-05-20 13:30:49 notice : Using encrypted passwords. Encryption key: '/var/lib/maxscale/.secrets'.
2018-05-20 13:30:49 notice : Starting a total of 4 services...
2018-05-20 13:30:49 notice : [MySQLAuth] [Write-Connection-Router] Loaded 7 MySQL users for listener Write-Connection-Listener.
2018-05-20 13:30:49 notice : Listening for connections at [::]:4007 with protocol MySQL
2018-05-20 13:30:49 notice : Service 'Write-Connection-Router' started (1/4)
2018-05-20 13:30:49 notice : [MySQLAuth] [Read-Connection-Router] Loaded 7 MySQL users for listener Read-Connection-Listener.
2018-05-20 13:30:49 notice : Listening for connections at [::]:4008 with protocol MySQL
2018-05-20 13:30:49 notice : Service 'Read-Connection-Router' started (2/4)
2018-05-20 13:30:49 warning: [readwritesplit] Router options for readwritesplit are deprecated.
2018-05-20 13:30:49 notice : [MySQLAuth] [RW-Split-Router] Loaded 7 MySQL users for listener RW-Split-Listener.
2018-05-20 13:30:49 notice : Listening for connections at [::]:4006 with protocol MySQL
2018-05-20 13:30:49 notice : Service 'RW-Split-Router' started (3/4)
2018-05-20 13:30:49 notice : Listening for connections at [/tmp/maxadmin.sock]:0 with protocol MaxScale Admin
2018-05-20 13:30:49 notice : Listening for connections at [/tmp/maxadmin.sock]:0 with protocol MaxScale Admin
2018-05-20 13:30:49 notice : Listening for connections at [localhost]:6603 with protocol MaxScale Admin
2018-05-20 13:30:49 notice : Service 'CLI' started (4/4)
2018-05-20 13:30:49 notice : Started MaxScale log flusher.
2018-05-20 13:30:49 notice : Started REST API on [127.0.0.1]:8989
2018-05-20 13:30:49 notice : MaxScale started with 4 worker threads, each with a stack size of 8388608 bytes.
2018-05-20 13:30:50 notice : Server changed state: db1[10.136.85.157:3306]: new_master. [Running] -> [Master, Synced, Running]
2018-05-20 13:30:50 notice : Server changed state: db2[10.136.87.40:3306]: new_slave. [Running] -> [Slave, Synced, Running]
2018-05-20 13:30:50 notice : Server changed state: db3[10.136.80.203:3306]: new_slave. [Running] -> [Slave, Synced, Running]
我测试了与三个侦听器的连接：
4006
[root@mxs01 ~]# for i in {1..10}; do mysql -ubianchi -p -h10.136.72.138 -P 4006 -e "select @@hostnameG"; done
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n02
4007
[root@mxs01 ~]# for i in {1..10}; do mysql -ubianchi -p -h10.136.72.138 -P 4007 -e "select @@hostnameG"; done
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
*************************** 1. row ***************************
@@hostname: n01
4008
[root@mxs01 ~]# for i in {1..10}; do mysql -ubianchi -p -h10.136.72.138 -P 4008 -e "select @@hostnameG"; done
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n03
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n03
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n03
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n03
*************************** 1. row ***************************
@@hostname: n02
*************************** 1. row ***************************
@@hostname: n03
试一试，让我们知道情况如何，干杯！
您能否暂时启用 Maxscale 实例上的log_info并再次尝试连接？启用log_info后，它将向Maxscale日志(/var/log/maxscale/maxscale.log(添加事件，该日志显示有关请求无法路由到后端的原因的更多详细信息。
以下命令将动态启用日志：
$ maxadmin 启用日志优先级信息
以下命令将动态禁用日志：
$ maxadmin 禁用日志优先级信息
期待收到您的来信。
要运行 Maxadmin 客户端，首先，您需要为该路由器分配 CLI 路由器和侦听器，如中所述：
https://mariadb.com/kb/en/mariadb-enterprise/mariadb-maxscale-21-maxscale-21-cli/。
要添加到/etc/maxscale.cnf 的配置如下：
[CLI]
type=service
router=cli
[CLIUnixListener]
type=listener
service=CLI
protocol=maxscaled
socket=default
[CLIInetListener]
type=listener
service=CLI
protocol=maxscaled
address=localhost
port=6603
将上述内容添加到/etc/maxscale.cnf 并重新启动 maxscale。之后，他们采用以下方法：
$ maxadmin -uadmin -pmariadb
或
$ sudo maxadmin
关于创建侦听器时的错误，您能否在这里分享Maxscale配置文件，然后我可以看看吗？检查Maxscale是否可以创建我上面建议的CLI路由器侦听器。
期待您的来信。
支持人员告诉你，你的意思是，Azure 支持Microsoft，对吧？顺便说一下，我的建议是你得到一个小项目，在Azure上设置自己的VNet，启动4个新的VM，1个Maxscale和MariaDB集群的3个其他VM。定义 VM 后，在所有服务器上设置 MariaDB 官方存储库：
curl -sS https://downloads.mariadb.com/MariaDB/mariadb_repo_setup | sudo bash
设置 MariaDB服务器和 MariaDB Maxscale，设置集群，创建 Maxscale 用户并使用我们在此处定义的配置使其工作。
去玩得开心吧。