MySQL-group-replication 配置

MySQL-Group-Replication 是mysql-5.7.17版本开发出来的新特性；它在master-slave 之间实现了强一致性，

但是就目前来说主要是性能不太好。

【1】确定当前的mysql数据库版本为5.7.17及以上

/usr/local/mysql/bin/mysqld --version
/usr/local/mysql/bin/mysqld  Ver 5.7.17 for linux-glibc2.5 on x86_64 (MySQL Community Server (GPL))

【2】实验环境为一台主机上安装3台mysql，它们三个组成一个group-replication 组

　　/tmp/4406.cnf 内容如下：

[mysqld]
####: for global
user                    =jianglexing                    #    mysql
basedir                    =/usr/local/mysql                #    /usr/local/mysql/
datadir                    =/tmp/6606/                #    /usr/local/mysql/data
server_id                =6606                        #    0
port                    =6606                        #    3306
socket                    =/tmp/6606/mysql.sock                #    /tmp/mysql.sock
auto_increment_increment        =1                        #    1
auto_increment_offset            =1                        #    1
lower_case_table_names            =1                        #    0
secure_file_priv            =                        #    null

####: for binlog
binlog_format                =row                        #    row
log_bin                    =mysql-bin                    #    off
binlog_rows_query_log_events        =on                        #    off
log_slave_updates            =on                        #    off
expire_logs_days            =4                        #    0
binlog_cache_size            =32768                        #    32768(32k)
binlog_checksum                =none                        #    CRC32
sync_binlog                =1                        #    1

####: for error-log
log_error                =mysql-err.log                    #    /usr/local/mysql/data/localhost.localdomain.err

####: for slow query log

####: for gtid
gtid_mode                =on                        #    off
enforce_gtid_consistency        =on                        #    off

####: for replication
master_info_repository            =table                        #    file
relay_log_info_repository        =table                        #    file

####: for group replication
transaction_write_set_extraction    =XXHASH64                    #    off
loose-group_replication_group_name    ="aaaaaaaa-aaaa-aaaa-aaaa-aaaaaaaaaaaa"        #
loose-group_replication_start_on_boot    =off                        #    off
loose-group_replication_local_address    ="127.0.0.1:24903"                #
loose-group_replication_group_seeds    ="127.0.0.1:24901,127.0.0.1:24902,127.0.0.1:24903"
loose-group_replication_bootstrap_group    =off                        #    off

####: for innodb
default_storage_engine            =innodb                        #    innodb
default_tmp_storage_engine        =innodb                        #    innodb
innodb_data_file_path            =ibdata1:12M:autoextend                #    ibdata1:12M:autoextend
innodb_temp_data_file_path        =ibtmp1:12M:autoextend                #    ibtmp1:12M:autoextend
innodb_log_group_home_dir        =./                        #    ./
innodb_log_files_in_group        =2                        #    2
innodb_log_file_size            =48M                        #    50331648(48M)
innodb_file_format            =Barracuda                    #    Barracuda
innodb_file_per_table            =on                         #    on
innodb_page_size            =16k                        #    16384(16k)
innodb_thread_concurrency        =0                        #    0
innodb_read_io_threads            =4                        #    4
innodb_write_io_threads            =4                        #    4
innodb_purge_threads            =4                        #    4
innodb_print_all_deadlocks        =on                        #    off
innodb_deadlock_detect            =on                        #    on
innodb_lock_wait_timeout        =50                        #    50
innodb_spin_wait_delay            =6                        #    6
innodb_autoinc_lock_mode        =2                        #    1
innodb_stats_persistent            =on                        #    on
innodb_stats_persistent_sample_pages    =20                        #    20
innodb_adaptive_hash_index        =on                        #    on
innodb_change_buffering            =all                        #    all
innodb_change_buffer_max_size        =25                        #    25
innodb_flush_neighbors            =1                        #    1
innodb_flush_method            =O_DIRECT                    #
innodb_doublewrite            =on                        #    on
innodb_log_buffer_size            =16M                        #    16777216(16M)
innodb_flush_log_at_timeout        =1                        #    1
innodb_flush_log_at_trx_commit        =1                        #    1
autocommit                =1                        #    1

View Code

【3】初始化三个数据库实例

cd /usr/local/mysql/
./bin/mysqld --defautls-file=/tmp/4406.cnf --datadir=/tmp/4406 --initialize-insecrue

./bin/mysqld --defautls-file=/tmp/5506.cnf --datadir=/tmp/5506 --initialize-insecrue

./bin/mysqld --defautls-file=/tmp/6606.cnf --datadir=/tmp/6606 --initialize-insecrue

【4】配置group-replication 的初始实例

/usr/local/mysql/bin/mysqld --defaults-file=/tmp/4406.cnf &

mysql -h127.0.0.1 -uroot -P4406

-- 增加用户
set sql_log_bin=0;
create user rpl_user@'%' identified by '123456';
grant replication slave,replication client on *.* to rpl_user@'%';
create user rpl_user@'127.0.0.1' identified by '123456';
grant replication slave,replication client on *.* to rpl_user@'127.0.0.1';
create user rpl_user@'localhost' identified by '123456';
grant replication slave,replication client on *.* to rpl_user@'localhost';
set sql_log_bin=1;

-- 增加复制凭证
change master to
master_user='rpl_user',
master_password='123456'
for channel 'group_replication_recovery';

-- 安装组复制物件
install plugin group_replication soname 'group_replication.so';

-- 启动组复制
set global group_replication_bootstrap_group=on;
start group_replication;
set global group_replication_bootstrap_group=off;

【5】5506 实例的配置过程如下：

/usr/local/mysql/bin/mysqld --defaults-file=/tmp/5506.cnf &

mysql -h127.0.0.1 -uroot -P5506

-- 增加用户
set sql_log_bin=0;
create user rpl_user@'%' identified by '123456';
grant replication slave,replication client on *.* to rpl_user@'%';
create user rpl_user@'127.0.0.1' identified by '123456';
grant replication slave,replication client on *.* to rpl_user@'127.0.0.1';
create user rpl_user@'localhost' identified by '123456';
grant replication slave,replication client on *.* to rpl_user@'localhost';
set sql_log_bin=1;

-- 增加复制凭证
change master to
master_user='rpl_user',
master_password='123456'
for channel 'group_replication_recovery';

-- 安装组复制物件
install plugin group_replication soname 'group_replication.so';

-- 启动组复制
start group_replication; # 注意这里不是初始化了，只要加入就行

【6】6606 实例的操作与5506的操作一样，这样group replication 的配置就完成了。

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