mysql 8.0.18 mgr搭建及其切换功能的案例

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 -y install make gcc-c++ cmake bison-devel ncurses-devel readline-devel libaio-devel perl libaio wget lrzsz vim libnuma* bzip2 xz

二、关闭防火墙和selinux

sed -i 's/SELINUX=enforcing/SELINUX=disabled/' /etc/selinux/configsetenforce 0/etc/init.d/iptables stopecho "/etc/init.d/iptables stop">>/etc/rc.local

三、修改系统限制参数

cat >> /etc/security/limits.conf << EOF####custom#* soft nofile 20480* hard nofile 65535* soft nproc 20480* hard nproc 65535EOF

四、配置每台hosts主机解析

cat >> /etc/hosts <<"EOF"10.10.146.28 bj-db-m1 10.10.1.139 bj-db-m2 10.10.173.84 bj-db-m3 EOF

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 = 1024 65535#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

wget https://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 -xJf mysql-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_64 mysql# 创建用户groupadd mysqluseradd -g mysql mysql -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 ]; then mv /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-Master configure#server-1 #auto-increment-offset = 1#auto-increment-increment = 2 #server-2    #auto-increment-offset = 2#auto-increment-increment = 2# semi sync replication settings ##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=2592000 master_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PCIe SSD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# some var for MySQL 8log_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'#innodb monitorinnodb_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group Replication plugin未加载 mysql server仍明治维新启动transaction_write_set_extraction = XXHASH64 #对每个事务获取write set，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select uuid()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.so nice=-19open-files-limit=65535EOF

7-2、第二台配置

# 第二台if [ -f /etc/my.cnf ]; then mv /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-Master configure#server-1 #auto-increment-offset = 1#auto-increment-increment = 2 #server-2    #auto-increment-offset = 2#auto-increment-increment = 2# semi sync replication settings ##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=2592000 master_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PCIe SSD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# some var for MySQL 8log_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'#innodb monitorinnodb_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group Replication plugin未加载 mysql server仍明治维新启动transaction_write_set_extraction = XXHASH64 #对每个事务获取write set，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select uuid()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.so nice=-19open-files-limit=65535EOF

7-3、第三台配置

# 第三台if [ -f /etc/my.cnf ]; then mv /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-Master configure#server-1 #auto-increment-offset = 1#auto-increment-increment = 2 #server-2    #auto-increment-offset = 2#auto-increment-increment = 2# semi sync replication settings ##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=2592000 master_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PCIe SSD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# some var for MySQL 8log_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'#innodb monitorinnodb_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group Replication plugin未加载 mysql server仍明治维新启动transaction_write_set_extraction = XXHASH64 #对每个事务获取write set，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select uuid()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.so nice=-19open-files-limit=65535EOF

八、修改权限、初始化并启动

chown -R mysql.mysql /data/mysql/mysql_3306chown -R mysql.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set sql_log_bin = 0;ALTER USER 'root'@'localhost' IDENTIFIED WITH mysql_native_password BY 'GJjumB6g4FcwdF3R6AZc' PASSWORD EXPIRE NEVER ;create user 'root'@'127.0.0.1' identified WITH mysql_native_password by 'GJjumB6g4FcwdF3R6AZc' PASSWORD EXPIRE NEVER ;grant all privileges on *.* to 'root'@'127.0.0.1' with grant option;create user 'admin_m'@'127.0.0.1' identified WITH mysql_native_password by 'fcfmTbRw1tz2x5L5GvjJ' PASSWORD EXPIRE NEVER ; grant all privileges on *.* to 'admin_m'@'127.0.0.1' with grant option;create user 'admin_m'@'%' identified WITH mysql_native_password by 'fcfmTbRw1tz2x5L5GvjJ' PASSWORD EXPIRE NEVER ; grant all privileges on *.* to 'admin_m'@'%' with grant option;create user 'test_w'@'%' identified with mysql_native_password by 'EeCrfUDO6wRzn72BBQ52' PASSWORD EXPIRE NEVER ;grant insert,delete,update,select on db144.* to 'test_w'@'%' ;create user 'test_r'@'%' identified with mysql_native_password by 'EeCrfUDO6wRzn72BBQ52' PASSWORD EXPIRE NEVER ;grant insert,delete,update,select on db144.* to 'test_r'@'%' ;create user 'repl'@'%' IDENTIFIED with mysql_native_password by 'replpfhOTnWffQdQL3F3' ;GRANT REPLICATION SLAVE ON *.* TO 'repl'@'%' ;set sql_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"##########alias mysql.3306.start="/usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql/mysql_3306/my_3306.cnf &"alias mysql.3306.stop="/usr/local/mysql/bin/mysqladmin -h227.0.0.1 -P 3306 -uroot -p'GJjumB6g4FcwdF3R6AZc' shutdown &"alias mysql.3306.login="/usr/local/mysql/bin/mysql -h227.0.0.1 -P 3306 -uroot -p'GJjumB6g4FcwdF3R6AZc'"##########EOFsource /root/.bash_profilecat >>/etc/ld.so.conf <<"EOF"/usr/local/mysql/libEOFldconfig mysql.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set sql_log_bin=0;create user 'repuser'@'%' identified by 'JhXpMK44ju8Vp5bxvO2N';grant replication slave,replication client on *.* to 'repuser'@'%';create user 'repuser'@'127.0.0.1' identified by 'JhXpMK44ju8Vp5bxvO2N';grant replication slave,replication client on *.* to 'repuser'@'127.0.0.1';create user 'repuser'@'localhost' identified by 'JhXpMK44ju8Vp5bxvO2N';grant replication slave,replication client on *.* to 'repuser'@'localhost';set sql_log_bin=1;# 第二步：配置复制所使用的用户change master to master_user='repuser',master_password='JhXpMK44ju8Vp5bxvO2N' for channel 'group_replication_recovery';# 第三步：安装mysql group replication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install plugin group_replication soname 'group_replication.so';# 通过show plugins;查看是否安装成功show plugins;# 第四步：建个群(官方点的说法就是初始化一个复制组set global group_replication_bootstrap_group=on;start group_replication;set global group_replication_bootstrap_group=off;select * from performance_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set sql_log_bin=0;create user 'repuser'@'%' identified by 'JhXpMK44ju8Vp5bxvO2N';grant replication slave,replication client on *.* to 'repuser'@'%';create user 'repuser'@'127.0.0.1' identified by 'JhXpMK44ju8Vp5bxvO2N';grant replication slave,replication client on *.* to 'repuser'@'127.0.0.1';create user 'repuser'@'localhost' identified by 'JhXpMK44ju8Vp5bxvO2N';grant replication slave,replication client on *.* to 'repuser'@'localhost';set sql_log_bin=1;# 第二步：配置复制所使用的用户change master to master_user='repuser',master_password='JhXpMK44ju8Vp5bxvO2N' for channel 'group_replication_recovery';# 第三步：安装mysql group replication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install plugin group_replication soname 'group_replication.so';# 通过show plugins;查看是否安装成功show plugins;# 第四步：加入前面创建好的复制组start group_replication;select * from performance_schema.replication_group_members;########################################################################################## 检查状态mysql> select * from performance_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  |+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+3 rows in set (0.00 sec)

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)：stop group_replication; set global group_replication_single_primary_mode=OFF;set global group_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):set global group_replication_recovery_get_public_key=1;SET GLOBAL group_replication_bootstrap_group=ON;START GROUP_REPLICATION;SET GLOBAL group_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):set global group_replication_recovery_get_public_key=1;START GROUP_REPLICATION;4) 查看MGR组信息 (在任意一个MGR节点上都可以查看)SELECT * FROM performance_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)：stop group_replication;set global group_replication_enforce_update_everywhere_checks=OFF;set global group_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)SET GLOBAL group_replication_bootstrap_group=ON;START GROUP_REPLICATION;SET GLOBAL group_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):START GROUP_REPLICATION;4) 查看MGR组信息 (在任意一个MGR节点上都可以查看)SELECT * FROM performance_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:STOP GROUP_REPLICATION;START GROUP_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("START GROUP_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> show global variables like '%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       |+----------------------------------------------+-------------------------------------------------------+rows in set (0.00 sec)# 在有故障的从库中操作stop GROUP_REPLICATION;reset master;set global gtid_purged='58f6e65e-9309-11e9-9d88-525400184a0a:1-946055:1000003';START GROUP_REPLICATION;# 添加白名单网段stop group_replication;set global group_replication_ip_whitelist="127.0.0.1/32,172.16.60.0/24,172.16.50.0/24,172.16.51.0/24";start group_replication;show variables like "group_replication_ip_whitelist";# 一定要注意: 配置白名单前面一定要先关闭 Group Replication, 及先要执行"stop group_replication;"

关于"mysql 8.0.18 mgr搭建及其切换功能的案例"这篇文章就分享到这里了，希望以上内容可以对大家有一定的帮助，使各位可以学到更多知识，如果觉得文章不错，请把它分享出去让更多的人看到。