MYSQL-MGR架构配置

MGR安装:
机器列表:
pc-s4 s4 --2
pc-s3 s3 --1
pc-s1 s1 --1
pc-s2 s2 --1

1,为初始化搭建，2，为后续添加

对1 三个数据库先进行初始化
=============================================================================
vi /etc/security/limits.conf
mysql soft nproc 16384
mysql hard nproc 16384
mysql soft nofile 65536
mysql hard nofile 65536
mysql soft stack 10240

groupadd mysql
useradd -d /home/mysql -g mysql mysql
# passwd mysql
----------------------------------------------------------------------------
PATH=$PATH:$HOME/bin

export PATH
export PATH=/app/mysql/bin:/bin:/usr/bin:/usr/local/bin:/usr/sbin:/app/percona-xtrabackup/bin:/app/percona-toolkit/bin
export MYSQL_HOME=/app/mysql
export MYSQL_PS1="\\u@\\h [\\d] \\r:\\m:\\s>>>"
export MYSQL_UNIX_PORT=/tmp/mysql.sock
#export MYSQL_PWD
#export MYSQL_TCP_PORT=3306
---------------------------------------------------------------------------
mkdir -p /data/mysqldata
mkdir -p /data/logs
mkdir -p /data/redolog
mkdir -p /data/undolog
mkdir -p /data/ibdata
mkdir -p /data/binlog

chown -R mysql:mysql /app/mysql
chown -R mysql:mysql /data/mysqldata
chown -R mysql:mysql /data/logs
chown -R mysql:mysql /data/redolog
chown -R mysql:mysql /data/undolog
chown -R mysql:mysql /data/binlog
chown -R mysql:mysql /data/ibdata

tar -xvf mysql-8.0.20-linux-glibc2.12-x86_64.tar.xz
ln -s /app/mysql-8.0.20-linux-glibc2.12-x86_64 /app/mysql

cd /app/mysql

cat>>my.cnf
--------------------------------------my.cnf 参数添加
#对于组复制，数据必须存储在InnoDB事务存储引擎中
disabled_storage_engines="MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY"

#组复制对于某些参数的要求，以下参数按照环境修改
server_id=1
gtid_mode=ON
enforce_gtid_consistency=ON
binlog_checksum=NONE

log_bin=binlog
log_slave_updates=ON
binlog_format=ROW
master_info_repository=TABLE
relay_log_info_repository=TABLE

#组复制设置参数
transaction_write_set_extraction=XXHASH64
plugin_load_add='group_replication.so'
group_replication_group_name="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"#设置一个有效值即可，可以用select uuid()生成
group_replication_start_on_boot=off
group_replication_local_address= "s1:33061"
group_replication_group_seeds= "s1:33061,s2:33061,s3:33061"
group_replication_bootstrap_group=off

s1 my.cnf 参考 ---后面两台根据这个调整ip，server-id ,组复制参数先不添加，初始化完成后，再添加重启。
[client]
port=3306
socket=/tmp/mysql.sock
default-character-set=utf8

[mysqld]
#***********************************common parameters******************************
#skip-slave-start
disabled_storage_engines="MyISAM,BLACKHOLE,FEDERATED,ARCHIVE,MEMORY"
character-set-server=utf8
default-time-zone='+8:00'
default-storage-engine = INNODB
port=3306
pid-file=/data/mysqldata/mysql.pid
socket=/tmp/mysql.sock
basedir=/app/mysql
datadir=/data/mysqldata
transaction_isolation = READ-COMMITTED

#MGR
server-id = 1
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="3db33b36-0e51-409f-a61d-c99756e90155"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "s1:23306"
loose-group_replication_group_seeds= "s2:23306,s3:23306,s4:23306"
loose-group_replication_bootstrap_group= off
loose-group_replication_single_primary_mode=true
loose-group_replication_enforce_update_everywhere_checks=false
loose-group_replication_ip_whitelist='s1,s2,s3,s4' ---白名单添加需先停止该节点group_replication

#MGR

skip-name-resolve
skip_external_locking
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
innodb_strict_mode = 1
log_bin_trust_function_creators = 1

max_connections = 3000
max_user_connections=2000
back_log=512
max_connect_errors=99999
max_allowed_packet = 128M
max_heap_table_size = 16M
tmp_table_size = 16M
max_length_for_sort_data = 16k
lower-case-table-names=1
table_open_cache = 2048
table_open_cache_instances = 2
table_definition_cache = 2048
thread_cache_size = 512

wait_timeout=200
interactive_timeout=28800
#***********************************thread parameters******************************
net_buffer_length = 8K
read_buffer_size = 4M
read_rnd_buffer_size = 16M
sort_buffer_size = 2M
join_buffer_size = 4M
binlog_cache_size = 2M
#******************************* Logs related settings ***************************
#error and slow logs
log_timestamps=SYSTEM
log_error=/data/logs/error.log
long_query_time = 2
slow_query_log = 1
slow_query_log_file=/data/logs/slow-query.log

#binlog
log-bin=/data/binlog/mysql-bin
expire_logs_days = 7
sync_binlog=1

server-id=1003
#******************************* Replication related settings **********************
gtid-mode=on # GTID only
enforce-gtid-consistency=true # GTID only
log-slave-updates
explicit_defaults_for_timestamp=true

# ***************************** INNODB Specific options *****************************
#### Data options
innodb_data_home_dir =/data/ibdata
innodb_data_file_path=ibdata1.dbf:2048M;ibdata2.dbf:2048M:autoextend
innodb_file_per_table = 1

#### Buffer Pool options
innodb_buffer_pool_size = 12G
innodb_buffer_pool_instances=8
innodb_max_dirty_pages_pct = 50
innodb_adaptive_flushing = ON
innodb_flush_neighbors = 0
innodb_change_buffering = ALL
innodb_old_blocks_time = 1000

#### Redo options
innodb_log_group_home_dir=/data/redolog
innodb_log_files_in_group = 4
innodb_log_buffer_size=128M
innodb_log_file_size=1024M
innodb_flush_log_at_trx_commit = 1

#### Transaction options
innodb_lock_wait_timeout = 120
innodb_rollback_on_timeout = 1

#### IO options
performance_schema=off
innodb_read_io_threads = 8
innodb_write_io_threads = 8
innodb_io_capacity = 2000
innodb_use_native_aio = 1

#### Undo options
innodb_undo_directory =/data/undolog
innodb_purge_threads = 4
innodb_purge_batch_size = 512
innodb_max_purge_lag = 65536
innodb_undo_log_truncate=on
innodb_max_undo_log_size=2048M

#### temp tablespace
innodb_temp_data_file_path=temp01.dbf:512M;temp02.dbf:512M

#### optimizer
optimizer_switch='index_condition_pushdown=on'
optimizer_switch='mrr=on'
optimizer_switch='batched_key_access=on'

# ***************************** OTHER Specific options *****************************
[mysql]
#no-auto-rehash
auto-rehash
show-warnings
prompt="\\u@\\h : \\d \\r:\\m:\\s>>> "
default-character-set = utf8

[mysqld_safe]
user=root
open-files-limit = 8192

[mysqldump]
quick
max_allowed_packet = 64M
default-character-set = utf8

初始化及启动
./bin/mysqld --defaults-file=my.cnf --initialize-insecure
./bin/mysqld_safe --defaults-file=my.cnf &

节点1：
SET SQL_LOG_BIN=0;
create user rpl@'%' identified WITH sha256_password by 'rpl';
grant replication slave on *.* to rpl@'%';
SET SQL_LOG_BIN=1;
change master to master_user='rpl',master_password='rpl' for channel 'group_replication_recovery';

install plugin group_replication soname 'group_replication.so'; --安装组复制插件

select * from mysql.plugin;

SET GLOBAL group_replication_bootstrap_group=ON; --启动组引导
START GROUP_REPLICATION; --启动组复制
SET GLOBAL group_replication_bootstrap_group=OFF;

select * from performance_schema.replication_group_members;--查看组成员

节点2,3:

SET SQL_LOG_BIN=0;
create user rpl@'%' identified WITH sha256_password by 'rpl';
grant replication slave on *.* to rpl@'%';
SET SQL_LOG_BIN=1;
change master to master_user='rpl',master_password='rpl' for channel 'group_replication_recovery';

install plugin group_replication soname 'group_replication.so'; --安装组复制插件

select * from mysql.plugin;
START GROUP_REPLICATION; --启动组复制
select * from performance_schema.replication_group_members;--查看组成员

运行一段时间后
MGR节点添加:

s4

数据量小,MYSQLDUMP同步数据：

数据量较大:xtrabackup 或其他方式同步数据 -----xtrabackup 同步数据后需要在新加节点点，设置 gtid_purged

修改 原有MGR成员组白名单及组成员信息
添加新加节点信息
group_replication_group_seeds
group_replication_ip_whitelist ----需停止该节点组复制后才能更改。

---
新节点数据导入后启动组复制--
change master to master_user='rpl',master_password='rpl' for channel 'group_replication_recovery';

install plugin group_replication soname 'group_replication.so';

start group_replication;

查看组成员信息:
select * from performance_schema.replication_group_members;