mysql+proxysql+replication-manager的主从半同步复制+高可用+读写分离

张元兵 发表于 2023-4-23 20:11:15

环境：
AlmaLinux release 9.1
MySQL Community Server Ver 8.0.33
Replication Manager v2.2.40 for MariaDB 10.x and MySQL 5.7 Series
ProxySQL version 2.5.1-90-gbedaa6c
主机分配情况：

采用hyper-v创建虚拟机的方式进行的，创建1台模板之后另外3台导入虚拟机复制。
1、安装mysql
mysql8的默认加密插件变为了caching_sha2_password需要修改成mysql_native_password，因为proxysql不支持caching_sha2_password
安装完成后在server01、02、03上创建以下用户
rep-manager供replication-manager使用，repl供主从复制使用
mysql> create user 'rep-manager'@'%' identified by 'your password';
Query OK, 0 rows affected (0.01 sec)

mysql> create user 'repl'@'%' identified by 'your password';
Query OK, 0 rows affected (0.02 sec)

mysql> create user 'proxysql'@'%' identified by 'your password';
Query OK, 0 rows affected (0.02 sec)

mysql> grant process,replication slave,replication client on *.* to 'proxysql'@'%';
Query OK, 0 rows affected (0.01 sec)

mysql> grant select,replication slave,replication client,reload,super on *.* to 'repl'@'%';
Query OK, 0 rows affected, 1 warning (0.01 sec)

mysql> grant all privileges on *.* to 'rep-manager'@'%' with grant option;
Query OK, 0 rows affected (0.01 sec)

mysql> flush privileges;
Query OK, 0 rows affected (0.01 sec)
2、复制虚拟机
3、在server00上安装replication-manager
4、在server00上安装proxysql
5、启动mysql，创建主从半同步复制
半同步需要安装插件，在主库和从库上都安装
mysql> install plugin rpl_semi_sync_source soname 'semisync_source.so';
mysql> install plugin rpl_semi_sync_replica soname 'semisync_replica.so';
mysql> show plugins; +----------------------------------+----------+--------------------+---------------------+---------+ | Name | Status | Type | Library | License | +----------------------------------+----------+--------------------+---------------------+---------+ | binlog | ACTIVE | STORAGE ENGINE | NULL | GPL | | mysql_native_password | ACTIVE | AUTHENTICATION | NULL | GPL | | sha256_password | ACTIVE | AUTHENTICATION | NULL | GPL | | caching_sha2_password | ACTIVE | AUTHENTICATION | NULL | GPL | | sha2_cache_cleaner | ACTIVE | AUDIT | NULL | GPL | | daemon_keyring_proxy_plugin | ACTIVE | DAEMON | NULL | GPL | | CSV | ACTIVE | STORAGE ENGINE | NULL | GPL | | MEMORY | ACTIVE | STORAGE ENGINE | NULL | GPL | | InnoDB | ACTIVE | STORAGE ENGINE | NULL | GPL | | INNODB_TRX | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CMP | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CMP_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CMPMEM | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CMPMEM_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CMP_PER_INDEX | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CMP_PER_INDEX_RESET | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_BUFFER_PAGE | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_BUFFER_PAGE_LRU | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_BUFFER_POOL_STATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_TEMP_TABLE_INFO | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_METRICS | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_FT_DEFAULT_STOPWORD | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_FT_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_FT_BEING_DELETED | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_FT_CONFIG | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_FT_INDEX_CACHE | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_FT_INDEX_TABLE | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_TABLES | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_TABLESTATS | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_TABLESPACES | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_COLUMNS | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_VIRTUAL | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_CACHED_INDEXES | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | INNODB_SESSION_TEMP_TABLESPACES | ACTIVE | INFORMATION SCHEMA | NULL | GPL | | MyISAM | ACTIVE | STORAGE ENGINE | NULL | GPL | | MRG_MYISAM | ACTIVE | STORAGE ENGINE | NULL | GPL | | PERFORMANCE_SCHEMA | ACTIVE | STORAGE ENGINE | NULL | GPL | | TempTable | ACTIVE | STORAGE ENGINE | NULL | GPL | | ARCHIVE | ACTIVE | STORAGE ENGINE | NULL | GPL | | BLACKHOLE | ACTIVE | STORAGE ENGINE | NULL | GPL | | FEDERATED | DISABLED | STORAGE ENGINE | NULL | GPL | | ndbcluster | DISABLED | STORAGE ENGINE | NULL | GPL | | ndbinfo | DISABLED | STORAGE ENGINE | NULL | GPL | | ndb_transid_mysql_connection_map | DISABLED | INFORMATION SCHEMA | NULL | GPL | | ngram | ACTIVE | FTPARSER | NULL | GPL | | mysqlx_cache_cleaner | ACTIVE | AUDIT | NULL | GPL | | mysqlx | ACTIVE | DAEMON | NULL | GPL | | rpl_semi_sync_source | ACTIVE | REPLICATION | semisync_source.so | GPL | | rpl_semi_sync_replica | ACTIVE | REPLICATION | semisync_replica.so | GPL | +----------------------------------+----------+--------------------+---------------------+---------+ 50 rows in set (0.00 sec) 要想永久启用半同步需将配置写入my.cnf看下面的配置即可。 在主库上查看是否启用了半同步 mysql> show variables like 'rpl_semi%'; +---------------------------------------------+------------+ | Variable_name | Value | +---------------------------------------------+------------+ | rpl_semi_sync_replica_enabled | ON | | rpl_semi_sync_replica_trace_level | 32 | | rpl_semi_sync_source_enabled | ON | | rpl_semi_sync_source_timeout | 10000 | | rpl_semi_sync_source_trace_level | 32 | | rpl_semi_sync_source_wait_for_replica_count | 1 | | rpl_semi_sync_source_wait_no_replica | ON | | rpl_semi_sync_source_wait_point | AFTER_SYNC | +---------------------------------------------+------------+ 从库上 mysql> show variables like 'rpl_semi%'; +---------------------------------------------+------------+ | Variable_name | Value | +---------------------------------------------+------------+ | rpl_semi_sync_replica_enabled | ON | | rpl_semi_sync_replica_trace_level | 32 | | rpl_semi_sync_source_enabled | ON | | rpl_semi_sync_source_timeout | 10000 | | rpl_semi_sync_source_trace_level | 32 | | rpl_semi_sync_source_wait_for_replica_count | 1 | | rpl_semi_sync_source_wait_no_replica | ON | | rpl_semi_sync_source_wait_point | AFTER_SYNC | +---------------------------------------------+------------+ 8 rows in set (0.01 sec)master主机mysql配置my.cnf如下
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove the leading "# " to disable binary logging # Binary logging captures changes between backups and is enabled by # default. It's default setting is log_bin=binlog # disable_log_bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M # # Remove leading # to revert to previous value for default_authentication_plugin, # this will increase compatibility with older clients. For background, see: # https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_default_authentication_plugin # default-authentication-plugin=mysql_native_password datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid default-authentication-plugin=mysql_native_password ######replication settings###### server-id=1001 log-bin=mysql-bin binlog_format=row binlog-ignore-db=mysql binlog-ignore-db=information_schema binlog-ignore-db=performance_schema binlog-ignore-db=sys ######gtid####### gtid_mode=on enforce_gtid_consistency=on binlog_gtid_simple_recovery=on relay_log_recovery = ON relay-log-index=mysql-relay relay-log=mysql-relay loose_rpl_semi_sync_source_enabled = ON loose_rpl_semi_sync_replica_enabled = ON log_slow_replica_statements = 1slave主机myql的配置如下：
# For advice on how to change settings please see # http://dev.mysql.com/doc/refman/8.0/en/server-configuration-defaults.html # # Remove leading # and set to the amount of RAM for the most important data # cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%. # innodb_buffer_pool_size = 128M # # Remove the leading "# " to disable binary logging # Binary logging captures changes between backups and is enabled by # default. It's default setting is log_bin=binlog # disable_log_bin # # Remove leading # to set options mainly useful for reporting servers. # The server defaults are faster for transactions and fast SELECTs. # Adjust sizes as needed, experiment to find the optimal values. # join_buffer_size = 128M # sort_buffer_size = 2M # read_rnd_buffer_size = 2M # # Remove leading # to revert to previous value for default_authentication_plugin, # this will increase compatibility with older clients. For background, see: # https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_default_authentication_plugin # default-authentication-plugin=mysql_native_password datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock log-error=/var/log/mysqld.log pid-file=/var/run/mysqld/mysqld.pid default-authentication-plugin=mysql_native_password ######replication settings###### server-id=1002 log-bin=mysql-bin binlog_format=row log_slave_updates=on relay_log_recovery=1 binlog-ignore-db=mysql binlog-ignore-db=information_schema binlog-ignore-db=performance_schema binlog-ignore-db=sys ######gtid####### gtid_mode=on enforce_gtid_consistency=on binlog_gtid_simple_recovery=on relay_log_recovery = ON relay-log-index=mysql-relay relay-log=mysql-relay loose_rpl_semi_sync_source_enabled = ON loose_rpl_semi_sync_replica_enabled = ON log_slow_replica_statements = 1 read_only = on 启动主从
mysql> CHANGE REPLICATION SOURCE to SOURCE_HOST='server01.mshome.net',SOURCE_USER='repl',SOURCE_PASSWORD='your password',SOURCE_PORT=3306; Query OK, 0 rows affected, 3 warnings (0.03 sec) mysql> start replica; Query OK, 0 rows affected (0.02 sec) mysql> show replica status\G; *************************** 1. row *************************** Replica_IO_State: Waiting for source to send event Source_Host: server01.mshome.net Source_User: repl Source_Port: 3306 Connect_Retry: 60 Source_Log_File: mysql-bin.000009 Read_Source_Log_Pos: 157 Relay_Log_File: mysql-relay.000010 Relay_Log_Pos: 373 Relay_Source_Log_File: mysql-bin.000009 Replica_IO_Running: Yes Replica_SQL_Running: Yes Replicate_Do_DB: Replicate_Ignore_DB: Replicate_Do_Table: Replicate_Ignore_Table: Replicate_Wild_Do_Table: Replicate_Wild_Ignore_Table: Last_Errno: 0 Last_Error: Skip_Counter: 0 Exec_Source_Log_Pos: 157 Relay_Log_Space: 795 Until_Condition: None Until_Log_File: Until_Log_Pos: 0 Source_SSL_Allowed: No Source_SSL_CA_File: Source_SSL_CA_Path: Source_SSL_Cert: Source_SSL_Cipher: Source_SSL_Key: Seconds_Behind_Source: 0 Source_SSL_Verify_Server_Cert: No Last_IO_Errno: 0 Last_IO_Error: Last_SQL_Errno: 0 Last_SQL_Error: Replicate_Ignore_Server_Ids: Source_Server_Id: 1001 Source_UUID: 590af332-e04e-11ed-8935-00155d030202 Source_Info_File: mysql.slave_master_info SQL_Delay: 0 SQL_Remaining_Delay: NULL Replica_SQL_Running_State: Replica has read all relay log; waiting for more updates Source_Retry_Count: 86400 Source_Bind: Last_IO_Error_Timestamp: Last_SQL_Error_Timestamp: Source_SSL_Crl: Source_SSL_Crlpath: Retrieved_Gtid_Set: Executed_Gtid_Set: Auto_Position: 0 Replicate_Rewrite_DB: Channel_Name: Source_TLS_Version: Source_public_key_path: Get_Source_public_key: 1 Network_Namespace: 1 row in set (0.00 sec) ERROR: No query specified server00主机上安装了replication-manager和proxysql
replication-manager的配置如下
查看replication-manager配置文件cluster1.toml cat /etc/replication-manager/cluster.d/cluster1.toml
title = "cluster1"
prov-orchestrator = "onpremise"
prov-db-tags = "innodb,noquerycache,slow,pfs,pkg,linux,smallredolog,logtotable"
prov-db-memory = "256"
prov-db-memory-shared-pct = "threads:16,innodb:60,myisam:10,aria:10,rocksdb:1,tokudb:1,s3:1,archive:1,querycache:0"
prov-db-disk-size = "1"
prov-db-cpu-cores = "1"
prov-db-disk-iops = "300"

db-servers-hosts = "server01.mshome.net:3306,server02.mshome.net:3306,server03.mshome.net:3306"
db-servers-prefered-master = "server01.mshome.net:3306"
db-servers-credential = "rep-manager:yourpassword"
db-servers-connect-timeout = 5
replication-credential = "rep-manager:yourpassword"

verbose = false
log-failed-election= true
log-level = 1
log-rotate-max-age = 7
log-rotate-max-backup = 7
log-rotate-max-size = 5
log-sql-in-monitoring = true
log-sst = true

##############
## TOPOLOGY ##
##############

replication-multi-master = false
replication-multi-tier-slave = false

############
# BACKUPS ##
###########

backup-streaming = false
backup-streaming-aws-access-key-id = "admin"
backup-streaming-aws-access-secret = "xxxx"
backup-streaming-endpoint= "https://s3.signal18.io/"
backup-streaming-region= "fr-1"
backup-streaming-bucket= "repman" 
#####这里可以设置备份工具restic，工具可以跨服务器，结合minio备份就很爽了，后续再介绍吧
backup-restic = false
backup-restic-aws =false
backup-physical-type = "mariabackup"
backup-logical-type = "mysqldump"
backup-restic-aws-access-secret = "xxxx"
backup-restic-password = "xxxx"
backup-restic-binary-path = "/usr/bin/restic"

monitoring-scheduler = true
scheduler-db-servers-logical-backup= true
scheduler-db-servers-logical-backup-cron= "0 30 23 * * 6"
scheduler-db-servers-logs =false
scheduler-db-servers-logs-cron = "0 0 * * * *"
scheduler-db-servers-logs-table-keep = 4
scheduler-db-servers-logs-table-rotate= false
scheduler-db-servers-logs-table-rotate-cron = "0 0 0/6 * * *"
scheduler-db-servers-optimize= false
scheduler-db-servers-optimize-cron = "0 0 3 1 * 5"
scheduler-db-servers-physical-backup = true
scheduler-db-servers-physical-backup-cron = "0 30 23 * * *"

##############
## FAILOVER ##
##############

failover-mode = "manual"
failover-pre-script = ""
failover-post-script = ""

## Slaves will re enter with read-only

failover-readonly-state = true
failover-event-scheduler = false
failover-event-status = false

## Failover after N failures detection

failover-falsepositive-ping-counter = 5

## Cancel failover if already N failover
## Cancel failover if last failover was N seconds before
## Cancel failover in semi-sync when one slave is not in sync
## Cancel failover if one slave receive master heartbeat
## Cancel failover when replication delay is more than N seconds

failover-limit = 0
failover-time-limit = 0
failover-at-sync = false
failover-max-slave-delay = 30
failover-restart-unsafe = false

# failover-falsepositive-heartbeat = true
# failover-falsepositive-heartbeat-timeout = 3
# failover-falsepositive-maxscale = false
# failover-falsepositive-maxscale-timeout = 14
# failover-falsepositive-external = false
# failover-falsepositive-external-port = 80

################
## SWITCHOVER ##
################

## In switchover Wait N milliseconds before killing long running transactions
## Cancel switchover if transaction running more than N seconds
## Cancel switchover if write query running more than N seconds
## Cancel switchover if one of the slaves is not synced based on GTID equality

switchover-wait-kill = 5000
switchover-wait-trx = 10
switchover-wait-write-query = 10
switchover-at-equal-gtid = false
switchover-at-sync = false
switchover-max-slave-delay = 30

############
## REJOIN ##
############

autorejoin = true
autorejoin-script = ""
autorejoin-semisync = true
autorejoin-backup-binlog = true
autorejoin-flashback = false
autorejoin-mysqldump = false

####################
## CHECKS & FORCE ##
####################

check-replication-filters = true
check-binlog-filters = true
check-replication-state = true

force-slave-heartbeat= false
force-slave-heartbeat-retry = 5
force-slave-heartbeat-time = 3
force-slave-gtid-mode = false
force-slave-semisync = false
force-slave-failover-readonly-state = false
force-binlog-row = false
force-binlog-annotate = false
force-binlog-slowqueries = false
force-binlog-compress = false
force-binlog-checksum = false
force-inmemory-binlog-cache-size = false
force-disk-relaylog-size-limit = false
force-disk-relaylog-size-limit-size = 1000000000
force-sync-binlog = false
force-sync-innodb = false

##############
## MAXSCALE ##
##############

## for 2 nodes cluster maxscale can be driven by replication manager

maxscale = false
maxscale-binlog = false
maxscale-servers = "192.168.0.201"
maxscale-port = 4003
maxscale-user = "admin"
maxscale-pass = "mariadb"

## When true replication manager drive maxscale server state
## Not required unless multiple maxscale or release does not support detect_stale_slave

maxscale-disable-monitor = false

## maxinfo|maxadmin

maxscale-get-info-method = "maxadmin"
maxscale-maxinfo-port = 4002

maxscale-write-port = 4007
maxscale-read-port = 4008
maxscale-read-write-port = 4006
maxscale-binlog-port = 4000

#############
## HAPROXY ##
#############

## Wrapper mode unless maxscale or proxysql required to be located with replication-manager

haproxy = false
haproxy-binary-path = "/usr/sbin/haproxy"

## Read write traffic
## Read only load balance least connection traffic
haproxy-write-port = 3306
haproxy-read-port = 3307

####################
## SHARDING PROXY ##
####################

mdbshardproxy = false
mdbshardproxy-hosts = "127.0.0.1:3306"
mdbshardproxy-user = "root:mariadb"

#################################
###### proxysql settings ########
#################################
proxysql = true
proxysql-servers = "127.0.0.1"
proxysql-port = "6033"
proxysql-admin-port = "6032"
proxysql-writer-hostgroup = "1000"
proxysql-reader-hostgroup = "1001"
proxysql-user = "admin"
proxysql-password = "admin"
proxysql-bootstrap = false
proxysql-bootstrap-users = false #不从master复制用户到proxysql，因为复制会出问题查看replication-manager配置文件config.toml cat /etc/replication-manager/config.toml

include = "/etc/replication-manager/cluster.d"

monitoring-save-config = false
monitoring-datadir = "/var/lib/replication-manager"
#monitoring-sharedir = "/usr/share/replication-manager"

## Timeout in seconds between consecutive monitoring

monitoring-ticker = 2

#########
## LOG ##
#########

log-file = "/var/log/replication-manager.log"
log-heartbeat = false
log-syslog = false

#################
## ARBITRATION ##
#################

arbitration-external = false
arbitration-external-secret = "13787932529099014144"
arbitration-external-hosts = "88.191.151.84:80"
arbitration-peer-hosts ="127.0.0.1:10002"

## Unique value on each replication-manager

arbitration-external-unique-id = 0

##########
## HTTP ##
##########

http-server = true
http-bind-address = "0.0.0.0"
http-port = "10001"
http-auth = false
http-session-lifetime = 3600
http-bootstrap-button = false
http-refresh-interval = 4000

#########
## API ##
#########

api-credentials = "admin:repman"
api-port = "10005"
api-https-bind = false

api-credentials-acl-allow ="admin:cluster proxy db prov,dba:cluster proxy db,foo:"
api-credentials-acl-discard = false
api-credentials-external = "dba:repman,foo:bar"

############
## ALERTS ##
############

mail-from = "replication-manager@localhost"
mail-smtp-addr = "localhost:25"
mail-to = "replication-manager@signal18.io"
mail-smtp-password=""
mail-smtp-user=""

alert-slack-channel = "#support"
alert-slack-url = ""
alert-slack-user = "svar"

##########
# STATS ##
##########

graphite-metrics = false
graphite-carbon-host = "127.0.0.1"
graphite-carbon-port = 2003
graphite-embedded = false
graphite-carbon-api-port = 10002
graphite-carbon-server-port = 10003
graphite-carbon-link-port = 7002
graphite-carbon-pickle-port = 2004
graphite-carbon-pprof-port = 7007
 ####这里可以设置逻辑备份和物理备份的程序，结合上面的配置里的restic做备份，很不错，后续有时间了再继续配置吧
backup-mydumper-path = "/usr/local/bin/mydumper"
backup-myloader-path = "/usr/local/bin/myloader"
backup-mysqlbinlog-path = "/usr/local/bin/mysqlbinlog"
backup-mysqldump-path = "/usr/local/bin/mysqldump"

##############
# BENCHMARK ##
##############

sysbench-binary-path = "/usr/bin/sysbench"
sysbench-threads = 4
sysbench-time = 100
sysbench-v1 = true查看proxysql的配置 cat /etc/proxysql.cnf#file proxysql.cfg

########################################################################################
# This config file is parsed using libconfig , and its grammar is described in:
# http://www.hyperrealm.com/libconfig/libconfig_manual.html#Configuration-File-Grammar
# Grammar is also copied at the end of this file
########################################################################################

########################################################################################
# IMPORTANT INFORMATION REGARDING THIS CONFIGURATION FILE:
########################################################################################
# On startup, ProxySQL reads its config file (if present) to determine its datadir.
# What happens next depends on if the database file (disk) is present in the defined
# datadir (i.e. "/var/lib/proxysql/proxysql.db").
#
# If the database file is found, ProxySQL initializes its in-memory configuration from
# the persisted on-disk database. So, disk configuration gets loaded into memory and
# then propagated towards the runtime configuration.
#
# If the database file is not found and a config file exists, the config file is parsed
# and its content is loaded into the in-memory database, to then be both saved on-disk
# database and loaded at runtime.
#
# IMPORTANT: If a database file is found, the config file is NOT parsed. In this case
# ProxySQL initializes its in-memory configuration from the persisted on-disk
# database ONLY. In other words, the configuration found in the proxysql.cnf
# file is only used to initial the on-disk database read on the first startup.
#
# In order to FORCE a re-initialise of the on-disk database from the configuration file
# the ProxySQL service should be started with "systemctl start proxysql-initial".
#
########################################################################################

datadir="/var/lib/proxysql"
errorlog="/var/lib/proxysql/proxysql.log"

admin_variables=
{
admin_credentials="admin:admin"
# mysql_ifaces="127.0.0.1:6032;/tmp/proxysql_admin.sock"
mysql_ifaces="0.0.0.0:6032"
# refresh_interval=2000
# debug=true
}

mysql_variables=
{
threads=4
max_connections=2048
default_query_delay=0
default_query_timeout=36000000
have_compress=true
poll_timeout=2000
# interfaces="0.0.0.0:6033;/tmp/proxysql.sock"
interfaces="0.0.0.0:6033"
default_schema="information_schema"
stacksize=1048576
server_version="5.5.30"
connect_timeout_server=3000
# make sure to configure monitor username and password
# https://github.com/sysown/proxysql/wiki/Global-variables#mysql-monitor_username-mysql-monitor_password
monitor_username="monitor"
monitor_password="monitor"
monitor_history=600000
monitor_connect_interval=60000
monitor_ping_interval=10000
monitor_read_only_interval=1500
monitor_read_only_timeout=500
ping_interval_server_msec=120000
ping_timeout_server=500
commands_stats=true
sessions_sort=true
connect_retries_on_failure=10
}

# defines all the MySQL servers
mysql_servers =
(
# {
# address = "127.0.0.1" # no default, required . If port is 0 , address is interpred as a Unix Socket Domain
# port = 3306 # no default, required . If port is 0 , address is interpred as a Unix Socket Domain
# hostgroup = 0 # no default, required
# status = "ONLINE" # default: ONLINE
# weight = 1 # default: 1
# compression = 0 # default: 0
# max_replication_lag = 10# default 0 . If greater than 0 and replication lag passes such threshold, the server is shunned
# },
# {
# address = "/var/lib/mysql/mysql.sock"
# port = 0
# hostgroup = 0
# },
# {
# address="127.0.0.1"
# port=21891
# hostgroup=0
# max_connections=200
# },
# { address="127.0.0.2" , port=3306 , hostgroup=0, max_connections=5 },
# { address="127.0.0.1" , port=21892 , hostgroup=1 },
# { address="127.0.0.1" , port=21893 , hostgroup=1 }
# { address="127.0.0.2" , port=3306 , hostgroup=1 },
# { address="127.0.0.3" , port=3306 , hostgroup=1 },
# { address="127.0.0.4" , port=3306 , hostgroup=1 },
# { address="/var/lib/mysql/mysql.sock" , port=0 , hostgroup=1 }
)

# defines all the MySQL users
mysql_users:
(
# {
# username = "username" # no default , required
# password = "password" # default: ''
# default_hostgroup = 0 # default: 0
# active = 1 # default: 1
# },
# {
# username = "root"
# password = ""
# default_hostgroup = 0
# max_connections=1000
# default_schema="test"
# active = 1
# },
# { username = "user1" , password = "password" , default_hostgroup = 0 , active = 0 }
)

#defines MySQL Query Rules
mysql_query_rules:
(
# {
# rule_id=1
# active=1
# match_pattern="^SELECT .* FOR UPDATE$"
# destination_hostgroup=0
# apply=1
# },
# {
# rule_id=2
# active=1
# match_pattern="^SELECT"
# destination_hostgroup=1
# apply=1
# }
)

scheduler=
(
#{
# id=1
# active=0
# interval_ms=10000
# filename="/var/lib/proxysql/proxysql_galera_checker.sh"
# arg1="0"
# arg2="0"
# arg3="0"
# arg4="1"
# arg5="/var/lib/proxysql/proxysql_galera_checker.log"
#}
)

mysql_replication_hostgroups=
(
# {
# writer_hostgroup=30
# reader_hostgroup=40
# comment="test repl 1"
# },
# {
# writer_hostgroup=50
# reader_hostgroup=60
# comment="test repl 2"
# }
)

# http://www.hyperrealm.com/libconfig/libconfig_manual.html#Configuration-File-Grammar
#
# Below is the BNF grammar for configuration files. Comments and include directives are not part of the grammar, so they are not included here.
#
# configuration = setting-list | empty
#
# setting-list = setting | setting-list setting
#
# setting = name (":" | "=") value (";" | "," | empty)
#
# value = scalar-value | array | list | group
#
# value-list = value | value-list "," value
#
# scalar-value = boolean | integer | integer64 | hex | hex64 | float
# | string
#
# scalar-value-list = scalar-value | scalar-value-list "," scalar-value
#
# array = "[" (scalar-value-list | empty) "]"
#
# list = "(" (value-list | empty) ")"
#
# group = "{" (setting-list | empty) "}"
#
# empty =其实proxysql配置基本上在启动了之后都是通过数据库来设置的配置文件
proxysql的配置如下，进入proxysql
# mysql -uadmin -p -P6032 -h127.0.0.1 --prompt='proxysql Admin> '
Enter password:
Welcome to the MySQL monitor.Commands end with ; or \g.
Your MySQL connection id is 9037
Server version: 5.5.30 (ProxySQL Admin Module)

Copyright (c) 2000, 2023, Oracle and/or its affiliates.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

proxysql Admin> proxysql Admin> set mysql-monitor_username='proxysql'; Query OK, 1 row affected (0.00 sec) proxysql Admin> set mysql-monitor_password='your password'; Query OK, 1 row affected (0.00 sec) proxysql Admin> select * from global_variables; | mysql-monitor_username | proxysql | | mysql-monitor_password | your password | | mysql-monitor_history | 600000 | | mysql-monitor_connect_interval | 60000 | | mysql-monitor_ping_interval | 10000 | | mysql-monitor_read_only_interval | 1500 | | mysql-monitor_read_only_timeout | 500 | | mysql-ping_interval_server_msec | 120000 | | mysql-ping_timeout_server | 500 | | mysql-commands_stats | true | | mysql-sessions_sort | true | | mysql-connect_retries_on_failure | 10 | | mysql-server_capabilities | 569899 | +----------------------------------------------------------------------+--------------------------------------------+ proxysql Admin> load mysql variables to runtime; Query OK, 0 rows affected (0.00 sec) proxysql Admin> save mysql variables to disk; Query OK, 155 rows affected (0.01 sec) proxysql Admin> insert into mysql_replication_hostgroups values(1000,1001,'read_only','读1000写1001分离'); Query OK, 1 row affected (0.00 sec) proxysql Admin> insert into mysql_servers(hostgroup_id,hostname,port) values(1000,'server01.mshome.net',3306); Query OK, 1 row affected (0.00 sec) proxysql Admin> insert into mysql_servers(hostgroup_id,hostname,port) values(1001,'server02.mshome.net',3306); Query OK, 1 row affected (0.00 sec) proxysql Admin> insert into mysql_servers(hostgroup_id,hostname,port) values(1001,'server03.mshome.net',3306); Query OK, 1 row affected (0.00 sec) proxysql Admin> load mysql servers to runtime; Query OK, 0 rows affected (0.00 sec) proxysql Admin> save mysql servers to disk; Query OK, 0 rows affected (0.05 sec) proxysql Admin> delete from mysql_users; Query OK, 1 row affected (0.00 sec) proxysql Admin> insert into mysql_users(username,password,default_hostgroup) values('appbox','Appbox@123',1000); Query OK, 1 row affected (0.00 sec) proxysql Admin> load mysql users to runtime; Query OK, 0 rows affected (0.00 sec) proxysql Admin> save mysql users to disk; Query OK, 0 rows affected (0.02 sec) 按照以上配置打开replication-manager的web管理端，默认账号admin密码repman

切换主从后

切换主从后

在server01的主库上创建appbox用户
mysql> create user appbox@'%' identified by 'Appbox@123';
Query OK, 0 rows affected (0.01 sec)

mysql> create database appboxdb character set utf8mb4;
Query OK, 1 row affected (0.01 sec)

mysql> grant all privileges on appboxdb.* to appbox@'%';
Query OK, 0 rows affected (0.01 sec)

mysql> 用Navicat连proxysql

在proxysql中插入读写规则
insert into mysql_query_rules(rule_id,active,match_digest,destination_hostgroup,apply)values(1,1,'^SELECT.*FOR UPDATE$',100,1);
insert into mysql_query_rules(rule_id,active,match_digest,destination_hostgroup,apply)values(2,1,'^SELECT',1000,1); load mysql query rules to runtime; save mysql query rules to disk;bash下进行读写测试
for i in {1..100}; do mysql -uappbox -pAppbox@123 -h server00.mshome.net-P6033-e 'select * from mysql.user LIMIT 2;' ; sleep 0.5; done如果有用，欢迎打赏，不限金额

来源:https://www.cnblogs.com/24la/p/mysql-proxysql-replication-manager-read-write-split-mha.html
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mysql+proxysql+replication-manager的主从半同步复制+高可用+读写分离