mysql 8.0.18 mgr搭建及其切换功能的案例

2025-03-29 技术教程

这篇文章将为大家详细讲解有关mysql 8.0.18 mgr搭建及其切换功能的案例，小编觉得挺实用的，因此分享给大家做个参考，希望大家阅读完这篇文章后可以有所收获。

一、系统安装包

yum-yinstallmakegcc-c++cmakebison-develncurses-develreadline-devellibaio-develperllibaiowgetlrzszvimlibnuma*bzip2xz

二、关闭防火墙和selinux

sed-i's/SELINUX=enforcing/SELINUX=disabled/'/etc/selinux/configsetenforce0/etc/init.d/iptablesstopecho"/etc/init.d/iptablesstop">>/etc/rc.local

三、修改系统限制参数

cat>>/etc/security/limits.conf<<EOF####custom#*softnofile20480*hardnofile65535*softnproc20480*hardnproc65535EOF

四、配置每台hosts主机解析

cat>>/etc/hosts<<"EOF"10.10.146.28bj-db-m110.10.1.139bj-db-m210.10.173.84bj-db-m3EOF

五、修改内核参数

cat>>/etc/sysctl.conf<<"EOF"vm.swappiness=0#增加tcp支持的队列数net.ipv4.tcp_max_syn_backlog=65535#减少断开连接时，资源回收net.ipv4.tcp_max_tw_buckets=8000net.ipv4.tcp_tw_reuse=1net.ipv4.tcp_tw_recycle=1net.ipv4.tcp_fin_timeout=10#改变本地的端口范围net.ipv4.ip_local_port_range=102465535#允许更多的连接进入队列net.ipv4.tcp_max_syn_backlog=4096#对于只在本地使用的数据库服务器net.ipv4.tcp_fin_timeout=30#端口监听队列net.core.somaxconn=65535#接受数据的速率net.core.netdev_max_backlog=65535net.core.wmem_default=87380net.core.wmem_max=16777216net.core.rmem_default=87380net.core.rmem_max=16777216EOFsysctl-p

六、下载安装包

wgethttps://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.18-linux-glibc2.12-x86_64.tar.xz#解压安装包tar-xJfmysql-8.0.18-linux-glibc2.12-x86_64.tar.xz#进入目录，做软连接，方便以后升级cd/usr/local/ln-s/opt/mysql-8.0.18-linux-glibc2.12-x86_64mysql#创建用户groupaddmysqluseradd-gmysqlmysql-d/home/mysql-s/sbin/nologin#创建相应的目录mkdir-p/data/mysql/mysql_3306/{logs,tmp,undolog}

七、创建my.cnf配置文件

7-1、第一台配置

#第一台if[-f/etc/my.cnf];thenmv/etc/my.cnf/etc/my.cnf.`date+%Y%m%d%H%m`.bakfi#node1cat>/data/mysql/mysql_3306/my_3306.cnf<<"EOF"[client]port=3306socket=/data/mysql/mysql_3306/tmp/mysql_3306.sock[mysql]prompt="\u@\h\R:\m:\s[\d]>"no-auto-rehash[mysqld]user=mysqlport=3306admin_address=127.0.0.1basedir=/usr/local/mysqldatadir=/data/mysql/mysql_3306/datasocket=/data/mysql/mysql_3306/tmp/mysql_3306.sockpid-file=mysql_3306.pidcharacter-set-server=utf8mb4skip_name_resolve=1#replicate-wild-ignore-table=mysql.%#replicate-wild-ignore-table=test.%#replicate-wild-ignore-table=information_schema.%#Two-Masterconfigure#server-1#auto-increment-offset=1#auto-increment-increment=2#server-2#auto-increment-offset=2#auto-increment-increment=2#semisyncreplicationsettings##plugin_dir=/usr/local/mysql/lib/mysql/plugin#plugin_load="validate_password.so;rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"plugin_dir=/usr/local/mysql/lib/plugin#官方版本的路径plugin_load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"#官方版本的路径slave_parallel_workers=4slave_parallel_type=LOGICAL_CLOCKslave_preserve_commit_order=1open_files_limit=65535back_log=1024max_connections=1024max_connect_errors=1000000table_open_cache=1024table_definition_cache=1024table_open_cache_instances=64thread_stack=512Kexternal-locking=FALSEmax_allowed_packet=32Msort_buffer_size=4Mjoin_buffer_size=4Mthread_cache_size=1536interactive_timeout=600wait_timeout=600tmp_table_size=32Mmax_heap_table_size=32Mslow_query_log=1log_timestamps=SYSTEMslow_query_log_file=/data/mysql/mysql_3306/logs/slow.loglog-error=/data/mysql/mysql_3306/logs/error.loglong_query_time=0.1log_queries_not_using_indexes=1log_throttle_queries_not_using_indexes=60min_examined_row_limit=100log_slow_admin_statements=1log_slow_slave_statements=1server-id=1423306log-bin=/data/mysql/mysql_3306/logs/mysql-binsync_binlog=1binlog_cache_size=4Mmax_binlog_cache_size=2Gmax_binlog_size=1Gbinlog_expire_logs_seconds=2592000master_info_repository=TABLErelay_log_info_repository=TABLEgtid_mode=onenforce_gtid_consistency=1binlog_checksum=NONElog_slave_updatesslave-rows-search-algorithms='INDEX_SCAN,HASH_SCAN'binlog_format=rowbinlog_row_image=FULLrelay_log_recovery=1relay-log-purge=1key_buffer_size=32Mread_buffer_size=8Mread_rnd_buffer_size=4Mbulk_insert_buffer_size=64Mmyisam_sort_buffer_size=128Mmyisam_max_sort_file_size=10Gmyisam_repair_threads=1lock_wait_timeout=3600explicit_defaults_for_timestamp=1innodb_thread_concurrency=0innodb_sync_spin_loops=100innodb_spin_wait_delay=30#transaction_isolation=REPEATABLE-READtransaction_isolation=READ-COMMITTED#innodb_additional_mem_pool_size=16Minnodb_buffer_pool_size=2867Minnodb_buffer_pool_instances=4innodb_buffer_pool_load_at_startup=1innodb_buffer_pool_dump_at_shutdown=1innodb_data_file_path=ibdata1:1G:autoextendinnodb_flush_log_at_trx_commit=1innodb_log_buffer_size=32Minnodb_log_file_size=2Ginnodb_log_files_in_group=3innodb_max_undo_log_size=4Ginnodb_undo_directory=/data/mysql/mysql_3306/undolog#根据您的服务器IOPS能力适当调整#一般配普通SSD盘的话，可以调整到10000-20000#配置高端PCIeSSD卡的话，则可以调整的更高，比如50000-80000innodb_io_capacity=4000innodb_io_capacity_max=8000innodb_flush_sync=0innodb_flush_neighbors=0innodb_write_io_threads=8innodb_read_io_threads=8innodb_purge_threads=4innodb_page_cleaners=4innodb_open_files=65535innodb_max_dirty_pages_pct=50innodb_flush_method=O_DIRECTinnodb_lru_scan_depth=4000innodb_checksum_algorithm=crc32innodb_lock_wait_timeout=10innodb_rollback_on_timeout=1innodb_print_all_deadlocks=1innodb_file_per_table=1innodb_online_alter_log_max_size=4Ginnodb_stats_on_metadata=0#somevarforMySQL8log_error_verbosity=3innodb_print_ddl_logs=1binlog_expire_logs_seconds=2592000#innodb_dedicated_server=0innodb_status_file=1#注意:开启innodb_status_output&innodb_status_output_locks后,可能会导致log-error文件增长较快innodb_status_output=0innodb_status_output_locks=0#performance_schemaperformance_schema=1performance_schema_instrument='%memory%=on'performance_schema_instrument='%lock%=on'#innodbmonitorinnodb_monitor_enable="module_innodb"innodb_monitor_enable="module_server"innodb_monitor_enable="module_dml"innodb_monitor_enable="module_ddl"innodb_monitor_enable="module_trx"innodb_monitor_enable="module_os"innodb_monitor_enable="module_purge"innodb_monitor_enable="module_log"innodb_monitor_enable="module_lock"innodb_monitor_enable="module_buffer"innodb_monitor_enable="module_index"innodb_monitor_enable="module_ibuf_system"innodb_monitor_enable="module_buffer_page"innodb_monitor_enable="module_adaptive_hash"#MGR#GR配置项基中loose前缀表示若groupReplicationplugin未加载mysqlserver仍明治维新启动transaction_write_set_extraction=XXHASH64#对每个事务获取writeset，并且用XXHASH64算法获取hash值loose-group_replication_group_name="58f6e65e-9309-11e9-9d88-525400184a0a"#组名，此处可拿selectuuid()生成loose-group_replication_start_on_boot=off#在mysqld启动时不自动启动组复制loose-group_replication_local_address="10.10.146.28:33006"#本节点的IP地址和端口，注意该端口是组内成员之间通信的端口，而不是MySQL对外提供服务的端口loose-group_replication_group_seeds="10.10.146.28:33006,10.10.1.139:33006,10.10.173.84:33006"#种子节点的IP和端口号，新成员加入到集群的时候需要联系种子节点，启动集群的节点不使用该选项loose-group_replication_bootstrap_group=off#关闭，如果打开会造成脑裂#是否启动集群，注意，该选项任何时候只能用于一个节点，通常情况下启动集群的时候使用，启动之后需要关闭该选项loose-group_replication_member_weight=50#权重选择[mysqldump]quickmax_allowed_packet=32M[mysqld_safe]#malloc-lib=/usr/local/mysql/lib/jmalloc.sonice=-19open-files-limit=65535EOF

7-2、第二台配置

#第二台if[-f/etc/my.cnf];thenmv/etc/my.cnf/etc/my.cnf.`date+%Y%m%d%H%m`.bakfi#node1cat>/data/mysql/mysql_3306/my_3306.cnf<<"EOF"[client]port=3306socket=/data/mysql/mysql_3306/tmp/mysql_3306.sock[mysql]prompt="\u@\h\R:\m:\s[\d]>"no-auto-rehash[mysqld]user=mysqlport=3306admin_address=127.0.0.1basedir=/usr/local/mysqldatadir=/data/mysql/mysql_3306/datasocket=/data/mysql/mysql_3306/tmp/mysql_3306.sockpid-file=mysql_3306.pidcharacter-set-server=utf8mb4skip_name_resolve=1#replicate-wild-ignore-table=mysql.%#replicate-wild-ignore-table=test.%#replicate-wild-ignore-table=information_schema.%#Two-Masterconfigure#server-1#auto-increment-offset=1#auto-increment-increment=2#server-2#auto-increment-offset=2#auto-increment-increment=2#semisyncreplicationsettings##plugin_dir=/usr/local/mysql/lib/mysql/plugin#plugin_load="validate_password.so;rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"plugin_dir=/usr/local/mysql/lib/plugin#官方版本的路径plugin_load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"#官方版本的路径slave_parallel_workers=4slave_parallel_type=LOGICAL_CLOCKslave_preserve_commit_order=1open_files_limit=65535back_log=1024max_connections=1024max_connect_errors=1000000table_open_cache=1024table_definition_cache=1024table_open_cache_instances=64thread_stack=512Kexternal-locking=FALSEmax_allowed_packet=32Msort_buffer_size=4Mjoin_buffer_size=4Mthread_cache_size=1536interactive_timeout=600wait_timeout=600tmp_table_size=32Mmax_heap_table_size=32Mslow_query_log=1log_timestamps=SYSTEMslow_query_log_file=/data/mysql/mysql_3306/logs/slow.loglog-error=/data/mysql/mysql_3306/logs/error.loglong_query_time=0.1log_queries_not_using_indexes=1log_throttle_queries_not_using_indexes=60min_examined_row_limit=100log_slow_admin_statements=1log_slow_slave_statements=1server-id=1433306log-bin=/data/mysql/mysql_3306/logs/mysql-binsync_binlog=1binlog_cache_size=4Mmax_binlog_cache_size=2Gmax_binlog_size=1Gbinlog_expire_logs_seconds=2592000master_info_repository=TABLErelay_log_info_repository=TABLEgtid_mode=onenforce_gtid_consistency=1binlog_checksum=NONElog_slave_updatesslave-rows-search-algorithms='INDEX_SCAN,HASH_SCAN'binlog_format=rowbinlog_row_image=FULLrelay_log_recovery=1relay-log-purge=1key_buffer_size=32Mread_buffer_size=8Mread_rnd_buffer_size=4Mbulk_insert_buffer_size=64Mmyisam_sort_buffer_size=128Mmyisam_max_sort_file_size=10Gmyisam_repair_threads=1lock_wait_timeout=3600explicit_defaults_for_timestamp=1innodb_thread_concurrency=0innodb_sync_spin_loops=100innodb_spin_wait_delay=30#transaction_isolation=REPEATABLE-READtransaction_isolation=READ-COMMITTED#innodb_additional_mem_pool_size=16Minnodb_buffer_pool_size=2867Minnodb_buffer_pool_instances=4innodb_buffer_pool_load_at_startup=1innodb_buffer_pool_dump_at_shutdown=1innodb_data_file_path=ibdata1:1G:autoextendinnodb_flush_log_at_trx_commit=1innodb_log_buffer_size=32Minnodb_log_file_size=2Ginnodb_log_files_in_group=3innodb_max_undo_log_size=4Ginnodb_undo_directory=/data/mysql/mysql_3306/undolog#根据您的服务器IOPS能力适当调整#一般配普通SSD盘的话，可以调整到10000-20000#配置高端PCIeSSD卡的话，则可以调整的更高，比如50000-80000innodb_io_capacity=4000innodb_io_capacity_max=8000innodb_flush_sync=0innodb_flush_neighbors=0innodb_write_io_threads=8innodb_read_io_threads=8innodb_purge_threads=4innodb_page_cleaners=4innodb_open_files=65535innodb_max_dirty_pages_pct=50innodb_flush_method=O_DIRECTinnodb_lru_scan_depth=4000innodb_checksum_algorithm=crc32innodb_lock_wait_timeout=10innodb_rollback_on_timeout=1innodb_print_all_deadlocks=1innodb_file_per_table=1innodb_online_alter_log_max_size=4Ginnodb_stats_on_metadata=0#somevarforMySQL8log_error_verbosity=3innodb_print_ddl_logs=1binlog_expire_logs_seconds=2592000#innodb_dedicated_server=0innodb_status_file=1#注意:开启innodb_status_output&innodb_status_output_locks后,可能会导致log-error文件增长较快innodb_status_output=0innodb_status_output_locks=0#performance_schemaperformance_schema=1performance_schema_instrument='%memory%=on'performance_schema_instrument='%lock%=on'#innodbmonitorinnodb_monitor_enable="module_innodb"innodb_monitor_enable="module_server"innodb_monitor_enable="module_dml"innodb_monitor_enable="module_ddl"innodb_monitor_enable="module_trx"innodb_monitor_enable="module_os"innodb_monitor_enable="module_purge"innodb_monitor_enable="module_log"innodb_monitor_enable="module_lock"innodb_monitor_enable="module_buffer"innodb_monitor_enable="module_index"innodb_monitor_enable="module_ibuf_system"innodb_monitor_enable="module_buffer_page"innodb_monitor_enable="module_adaptive_hash"#MGR#GR配置项基中loose前缀表示若groupReplicationplugin未加载mysqlserver仍明治维新启动transaction_write_set_extraction=XXHASH64#对每个事务获取writeset，并且用XXHASH64算法获取hash值loose-group_replication_group_name="58f6e65e-9309-11e9-9d88-525400184a0a"#组名，此处可拿selectuuid()生成loose-group_replication_start_on_boot=off#在mysqld启动时不自动启动组复制loose-group_replication_local_address="10.10.1.139:33006"#本节点的IP地址和端口，注意该端口是组内成员之间通信的端口，而不是MySQL对外提供服务的端口loose-group_replication_group_seeds="10.10.146.28:33006,10.10.1.139:33006,10.10.173.84:33006"#种子节点的IP和端口号，新成员加入到集群的时候需要联系种子节点，启动集群的节点不使用该选项loose-group_replication_bootstrap_group=off#关闭，如果打开会造成脑裂#是否启动集群，注意，该选项任何时候只能用于一个节点，通常情况下启动集群的时候使用，启动之后需要关闭该选项loose-group_replication_member_weight=50#权重选择[mysqldump]quickmax_allowed_packet=32M[mysqld_safe]#malloc-lib=/usr/local/mysql/lib/jmalloc.sonice=-19open-files-limit=65535EOF

7-3、第三台配置

#第三台if[-f/etc/my.cnf];thenmv/etc/my.cnf/etc/my.cnf.`date+%Y%m%d%H%m`.bakfi#node1cat>/data/mysql/mysql_3306/my_3306.cnf<<"EOF"[client]port=3306socket=/data/mysql/mysql_3306/tmp/mysql_3306.sock[mysql]prompt="\u@\h\R:\m:\s[\d]>"no-auto-rehash[mysqld]user=mysqlport=3306admin_address=127.0.0.1basedir=/usr/local/mysqldatadir=/data/mysql/mysql_3306/datasocket=/data/mysql/mysql_3306/tmp/mysql_3306.sockpid-file=mysql_3306.pidcharacter-set-server=utf8mb4skip_name_resolve=1#replicate-wild-ignore-table=mysql.%#replicate-wild-ignore-table=test.%#replicate-wild-ignore-table=information_schema.%#Two-Masterconfigure#server-1#auto-increment-offset=1#auto-increment-increment=2#server-2#auto-increment-offset=2#auto-increment-increment=2#semisyncreplicationsettings##plugin_dir=/usr/local/mysql/lib/mysql/plugin#plugin_load="validate_password.so;rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"plugin_dir=/usr/local/mysql/lib/plugin#官方版本的路径plugin_load="rpl_semi_sync_master=semisync_master.so;rpl_semi_sync_slave=semisync_slave.so"#官方版本的路径slave_parallel_workers=4slave_parallel_type=LOGICAL_CLOCKslave_preserve_commit_order=1open_files_limit=65535back_log=1024max_connections=1024max_connect_errors=1000000table_open_cache=1024table_definition_cache=1024table_open_cache_instances=64thread_stack=512Kexternal-locking=FALSEmax_allowed_packet=32Msort_buffer_size=4Mjoin_buffer_size=4Mthread_cache_size=1536interactive_timeout=600wait_timeout=600tmp_table_size=32Mmax_heap_table_size=32Mslow_query_log=1log_timestamps=SYSTEMslow_query_log_file=/data/mysql/mysql_3306/logs/slow.loglog-error=/data/mysql/mysql_3306/logs/error.loglong_query_time=0.1log_queries_not_using_indexes=1log_throttle_queries_not_using_indexes=60min_examined_row_limit=100log_slow_admin_statements=1log_slow_slave_statements=1server-id=1443306log-bin=/data/mysql/mysql_3306/logs/mysql-binsync_binlog=1binlog_cache_size=4Mmax_binlog_cache_size=2Gmax_binlog_size=1Gbinlog_expire_logs_seconds=2592000master_info_repository=TABLErelay_log_info_repository=TABLEgtid_mode=onenforce_gtid_consistency=1binlog_checksum=NONElog_slave_updatesslave-rows-search-algorithms='INDEX_SCAN,HASH_SCAN'binlog_format=rowbinlog_row_image=FULLrelay_log_recovery=1relay-log-purge=1key_buffer_size=32Mread_buffer_size=8Mread_rnd_buffer_size=4Mbulk_insert_buffer_size=64Mmyisam_sort_buffer_size=128Mmyisam_max_sort_file_size=10Gmyisam_repair_threads=1lock_wait_timeout=3600explicit_defaults_for_timestamp=1innodb_thread_concurrency=0innodb_sync_spin_loops=100innodb_spin_wait_delay=30#transaction_isolation=REPEATABLE-READtransaction_isolation=READ-COMMITTED#innodb_additional_mem_pool_size=16Minnodb_buffer_pool_size=2867Minnodb_buffer_pool_instances=4innodb_buffer_pool_load_at_startup=1innodb_buffer_pool_dump_at_shutdown=1innodb_data_file_path=ibdata1:1G:autoextendinnodb_flush_log_at_trx_commit=1innodb_log_buffer_size=32Minnodb_log_file_size=2Ginnodb_log_files_in_group=3innodb_max_undo_log_size=4Ginnodb_undo_directory=/data/mysql/mysql_3306/undolog#根据您的服务器IOPS能力适当调整#一般配普通SSD盘的话，可以调整到10000-20000#配置高端PCIeSSD卡的话，则可以调整的更高，比如50000-80000innodb_io_capacity=4000innodb_io_capacity_max=8000innodb_flush_sync=0innodb_flush_neighbors=0innodb_write_io_threads=8innodb_read_io_threads=8innodb_purge_threads=4innodb_page_cleaners=4innodb_open_files=65535innodb_max_dirty_pages_pct=50innodb_flush_method=O_DIRECTinnodb_lru_scan_depth=4000innodb_checksum_algorithm=crc32innodb_lock_wait_timeout=10innodb_rollback_on_timeout=1innodb_print_all_deadlocks=1innodb_file_per_table=1innodb_online_alter_log_max_size=4Ginnodb_stats_on_metadata=0#somevarforMySQL8log_error_verbosity=3innodb_print_ddl_logs=1binlog_expire_logs_seconds=2592000#innodb_dedicated_server=0innodb_status_file=1#注意:开启innodb_status_output&innodb_status_output_locks后,可能会导致log-error文件增长较快innodb_status_output=0innodb_status_output_locks=0#performance_schemaperformance_schema=1performance_schema_instrument='%memory%=on'performance_schema_instrument='%lock%=on'#innodbmonitorinnodb_monitor_enable="module_innodb"innodb_monitor_enable="module_server"innodb_monitor_enable="module_dml"innodb_monitor_enable="module_ddl"innodb_monitor_enable="module_trx"innodb_monitor_enable="module_os"innodb_monitor_enable="module_purge"innodb_monitor_enable="module_log"innodb_monitor_enable="module_lock"innodb_monitor_enable="module_buffer"innodb_monitor_enable="module_index"innodb_monitor_enable="module_ibuf_system"innodb_monitor_enable="module_buffer_page"innodb_monitor_enable="module_adaptive_hash"#MGR#GR配置项基中loose前缀表示若groupReplicationplugin未加载mysqlserver仍明治维新启动transaction_write_set_extraction=XXHASH64#对每个事务获取writeset，并且用XXHASH64算法获取hash值loose-group_replication_group_name="58f6e65e-9309-11e9-9d88-525400184a0a"#组名，此处可拿selectuuid()生成loose-group_replication_start_on_boot=off#在mysqld启动时不自动启动组复制loose-group_replication_local_address="10.10.173.84:33006"#本节点的IP地址和端口，注意该端口是组内成员之间通信的端口，而不是MySQL对外提供服务的端口loose-group_replication_group_seeds="10.10.146.28:33006,10.10.1.139:33006,10.10.173.84:33006"#种子节点的IP和端口号，新成员加入到集群的时候需要联系种子节点，启动集群的节点不使用该选项loose-group_replication_bootstrap_group=off#关闭，如果打开会造成脑裂#是否启动集群，注意，该选项任何时候只能用于一个节点，通常情况下启动集群的时候使用，启动之后需要关闭该选项loose-group_replication_member_weight=50#权重选择[mysqldump]quickmax_allowed_packet=32M[mysqld_safe]#malloc-lib=/usr/local/mysql/lib/jmalloc.sonice=-19open-files-limit=65535EOF

八、修改权限、初始化并启动

chown-Rmysql.mysql/data/mysql/mysql_3306chown-Rmysql.mysql/usr/local/mysql/#初始化#/usr/local/mysql/bin/mysqld--user=mysql--basedir=/usr/local/mysql--datadir=/data/mysql--initialize-insecure#官方推荐使用--initialize，会在错误日志中生成难以输入的临时密码，我这里使用的免密码的方式。/usr/local/mysql/bin/mysqld--defaults-file=/data/mysql/mysql_3306/my_3306.cnf--initialize-insecure--user=mysql&#启动数据库/usr/local/mysql/bin/mysqld_safe--defaults-file=/data/mysql/mysql_3306/my_3306.cnf&

九、查看日志

#9、查看日志#tail-f/data/mysql/mysql_3306/logs/error.log

十、初次登陆

#10、初次登陆/usr/local/mysql/bin/mysql-S/data/mysql/mysql_3306/tmp/mysql_3306.sock

十一、修改密码

#修改密码方法setsql_log_bin=0;ALTERUSER'root'@'localhost'IDENTIFIEDWITHmysql_native_passwordBY'GJjumB6g4FcwdF3R6AZc'PASSWORDEXPIRENEVER;createuser'root'@'127.0.0.1'identifiedWITHmysql_native_passwordby'GJjumB6g4FcwdF3R6AZc'PASSWORDEXPIRENEVER;grantallprivilegeson*.*to'root'@'127.0.0.1'withgrantoption;createuser'admin_m'@'127.0.0.1'identifiedWITHmysql_native_passwordby'fcfmTbRw1tz2x5L5GvjJ'PASSWORDEXPIRENEVER;grantallprivilegeson*.*to'admin_m'@'127.0.0.1'withgrantoption;createuser'admin_m'@'%'identifiedWITHmysql_native_passwordby'fcfmTbRw1tz2x5L5GvjJ'PASSWORDEXPIRENEVER;grantallprivilegeson*.*to'admin_m'@'%'withgrantoption;createuser'test_w'@'%'identifiedwithmysql_native_passwordby'EeCrfUDO6wRzn72BBQ52'PASSWORDEXPIRENEVER;grantinsert,delete,update,selectondb144.*to'test_w'@'%';createuser'test_r'@'%'identifiedwithmysql_native_passwordby'EeCrfUDO6wRzn72BBQ52'PASSWORDEXPIRENEVER;grantinsert,delete,update,selectondb144.*to'test_r'@'%';createuser'repl'@'%'IDENTIFIEDwithmysql_native_passwordby'replpfhOTnWffQdQL3F3';GRANTREPLICATIONSLAVEON*.*TO'repl'@'%';setsql_log_bin=1;

十二、快捷方式设置

快捷方式

ln-s/usr/local/mysql/lib/libmysqlclient.so/usr/lib/ln-s/usr/local/mysql/lib/libmysqlclient.so.21/usr/lib/libmysqlclient.so.21ln-s/usr/local/mysql/lib/libmysqlclient.so/usr/lib64/ln-s/usr/local/mysql/lib/libmysqlclient.so.21/usr/lib64/libmysqlclient.so.21ln-s/data/mysql/mysql_3306/tmp/mysql_3306.sock/tmp/mysql.sockln-s/usr/local/mysql/bin/*/usr/bin/cat>>~/.bashrc<<"EOF"##########aliasmysql.3306.start="/usr/local/mysql/bin/mysqld_safe--defaults-file=/data/mysql/mysql_3306/my_3306.cnf&"aliasmysql.3306.stop="/usr/local/mysql/bin/mysqladmin-h227.0.0.1-P3306-uroot-p'GJjumB6g4FcwdF3R6AZc'shutdown&"aliasmysql.3306.login="/usr/local/mysql/bin/mysql-h227.0.0.1-P3306-uroot-p'GJjumB6g4FcwdF3R6AZc'"##########EOFsource/root/.bash_profilecat>>/etc/ld.so.conf<<"EOF"/usr/local/mysql/libEOFldconfigmysql.3306.login

十三、MGR配置

13-1、第一台配置

#MGR第一台配置：#第一步：创建用于复制的用户setsql_log_bin=0;createuser'repuser'@'%'identifiedby'JhXpMK44ju8Vp5bxvO2N';grantreplicationslave,replicationclienton*.*to'repuser'@'%';createuser'repuser'@'127.0.0.1'identifiedby'JhXpMK44ju8Vp5bxvO2N';grantreplicationslave,replicationclienton*.*to'repuser'@'127.0.0.1';createuser'repuser'@'localhost'identifiedby'JhXpMK44ju8Vp5bxvO2N';grantreplicationslave,replicationclienton*.*to'repuser'@'localhost';setsql_log_bin=1;#第二步：配置复制所使用的用户changemastertomaster_user='repuser',master_password='JhXpMK44ju8Vp5bxvO2N'forchannel'group_replication_recovery';#第三步：安装mysqlgroupreplication这个插件#备注：如果在my.cnf里写写入plugin_load="group_replication=group_replication.so"这步就可以不用操作installplugingroup_replicationsoname'group_replication.so';#通过showplugins;查看是否安装成功showplugins;#第四步：建个群(官方点的说法就是初始化一个复制组setglobalgroup_replication_bootstrap_group=on;startgroup_replication;setglobalgroup_replication_bootstrap_group=off;select*fromperformance_schema.replication_group_members;

13-2、第二台、第三台配置

###########################################################################MGR配置其他从节点#在所有从主机上的mysql中执行#第一步：创建用于复制的用户setsql_log_bin=0;createuser'repuser'@'%'identifiedby'JhXpMK44ju8Vp5bxvO2N';grantreplicationslave,replicationclienton*.*to'repuser'@'%';createuser'repuser'@'127.0.0.1'identifiedby'JhXpMK44ju8Vp5bxvO2N';grantreplicationslave,replicationclienton*.*to'repuser'@'127.0.0.1';createuser'repuser'@'localhost'identifiedby'JhXpMK44ju8Vp5bxvO2N';grantreplicationslave,replicationclienton*.*to'repuser'@'localhost';setsql_log_bin=1;#第二步：配置复制所使用的用户changemastertomaster_user='repuser',master_password='JhXpMK44ju8Vp5bxvO2N'forchannel'group_replication_recovery';#第三步：安装mysqlgroupreplication这个插件#备注：如果在my.cnf里写写入plugin_load="group_replication=group_replication.so"这步就可以不用操作installplugingroup_replicationsoname'group_replication.so';#通过showplugins;查看是否安装成功showplugins;#第四步：加入前面创建好的复制组startgroup_replication;select*fromperformance_schema.replication_group_members;##########################################################################################检查状态mysql>select*fromperformance_schema.replication_group_members;+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+|CHANNEL_NAME|MEMBER_ID|MEMBER_HOST|MEMBER_PORT|MEMBER_STATE|MEMBER_ROLE|MEMBER_VERSION|+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+|group_replication_applier|d955da6d-0048-11ea-b7b4-525400f4342d|bj-db-m1|3306|ONLINE|PRIMARY|8.0.18||group_replication_applier|e050c34f-0048-11ea-917d-52540021fab9|bj-db-m3|3306|ONLINE|SECONDARY|8.0.18||group_replication_applier|e6c56347-0048-11ea-9e8b-5254007c241f|bj-db-m2|3306|ONLINE|SECONDARY|8.0.18|+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+3rowsinset(0.00sec)

十四、单主切换到多主

#######################################################################单主切换到多主#MGR切换模式需要重新启动组复制，因此需要在所有节点上先关闭组复制，#设置group_replication_single_primary_mode=OFF等参数，再启动组复制。1)停止组复制(在所有MGR节点上执行)：stopgroup_replication;setglobalgroup_replication_single_primary_mode=OFF;setglobalgroup_replication_enforce_update_everywhere_checks=ON;2)随便选择某个MGR节点执行(比如这里选择在MGR-node1节点):setglobalgroup_replication_recovery_get_public_key=1;SETGLOBALgroup_replication_bootstrap_group=ON;STARTGROUP_REPLICATION;SETGLOBALgroup_replication_bootstrap_group=OFF;3)然后在其他的MGR节点执行(这里指MGR-node2和MGR-node3节点上执行):setglobalgroup_replication_recovery_get_public_key=1;STARTGROUP_REPLICATION;4)查看MGR组信息(在任意一个MGR节点上都可以查看)SELECT*FROMperformance_schema.replication_group_members;#可以看到所有MGR节点状态都是online，角色都是PRIMARY，MGR多主模式搭建成功。

##########################################################################

十五、多主切换回单主

###########################################################################多主切回单主模式1)停止组复制(在所有MGR节点上执行)：stopgroup_replication;setglobalgroup_replication_enforce_update_everywhere_checks=OFF;setglobalgroup_replication_single_primary_mode=ON;2)选择一个节点作为主节点,在主节点上执行(这里选择MGR-node1节点作为主节点)SETGLOBALgroup_replication_bootstrap_group=ON;STARTGROUP_REPLICATION;SETGLOBALgroup_replication_bootstrap_group=OFF;3)在其他剩余的节点,也就是从库节点上执行(这里从库节点指的就是MGR-node2和MGR-node3):STARTGROUP_REPLICATION;4)查看MGR组信息(在任意一个MGR节点上都可以查看)SELECT*FROMperformance_schema.replication_group_members;##########################################################################

十六、故障注意事项

#故障注意点：#单主模式，恢复MGR-node1节点,恢复后,需要手动激活下该节点的组复制功能#如果节点发生故障,在恢复后需要重新加入到MGR集群里,正确的做法是:STOPGROUP_REPLICATION;STARTGROUP_REPLICATION;#如果某个节点挂了,则其他的节点继续进行同步.#当故障节点恢复后,只需要手动激活下该节点的组复制功能("STARTGROUP_REPLICATION;"),#即可正常加入到MGR组复制集群内并自动同步其他节点数据.#如果是i/o复制出现异常#确定数据无误后#查找主库的gtid情况mysql>showglobalvariableslike'%gtid%';+----------------------------------------------+-------------------------------------------------------+|Variable_name|Value|+----------------------------------------------+-------------------------------------------------------+|binlog_gtid_simple_recovery|ON||enforce_gtid_consistency|ON||group_replication_gtid_assignment_block_size|1000000||gtid_executed|58f6e65e-9309-11e9-9d88-525400184a0a:1-946050:1000003||gtid_executed_compression_period|1000||gtid_mode|ON||gtid_owned|||gtid_purged|||session_track_gtids|OFF|+----------------------------------------------+-------------------------------------------------------+rowsinset(0.00sec)#在有故障的从库中操作stopGROUP_REPLICATION;resetmaster;setglobalgtid_purged='58f6e65e-9309-11e9-9d88-525400184a0a:1-946055:1000003';STARTGROUP_REPLICATION;#添加白名单网段stopgroup_replication;setglobalgroup_replication_ip_whitelist="127.0.0.1/32,172.16.60.0/24,172.16.50.0/24,172.16.51.0/24";startgroup_replication;showvariableslike"group_replication_ip_whitelist";#一定要注意:配置白名单前面一定要先关闭GroupReplication,及先要执行"stopgroup_replication;"

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