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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/4406/ # /usr/local/mysql/data server_id =4406 # 0 port =4406 # 3306 socket =/tmp/4406/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 ="127.0.0.1:24901" # 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 [client] auto-rehash
/tmp/5506.cnf 内容如下：
[mysqld] ####: for global user =jianglexing # mysql basedir =/usr/local/mysql # /usr/local/mysql/ datadir =/tmp/5506 # /usr/local/mysql/data server_id =5506 # 0 port =5506 # 3306 socket =/tmp/5506/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 ="127.0.0.1:24902" # 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
/tmp/6606.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
【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。
以上这篇MySQL-group-replication 配置步骤(推荐)就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。
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