mysql 8.0.18 mgr 搭建及其切换功能
davie2020 人气:0这篇文章主要介绍了mysql 8.0.18 mysql搭建及其切换功能，本文通过实例代码给大家讲解的非常详细，具有一定的参考借鉴价值,需要的朋友可以参考下
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/config setenforce 0 /etc/init.d/iptables stop echo "/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 65535 EOF
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 = 8000 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 1 net.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=65535 net.core.wmem_default=87380 net.core.wmem_max=16777216 net.core.rmem_default=87380 net.core.rmem_max=16777216 EOF sysctl -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 mysql
useradd -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`.bak fi # node1 cat >/data/mysql/mysql_3306/my_3306.cnf <<"EOF" [client] port = 3306 socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock [mysql] prompt="\u@\h \R:\m:\s [\d]> " no-auto-rehash [mysqld] user = mysql port = 3306 admin_address = 127.0.0.1 basedir = /usr/local/mysql datadir = /data/mysql/mysql_3306/data socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock pid-file = mysql_3306.pid character-set-server = utf8mb4 skip_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 = 4 slave_parallel_type = LOGICAL_CLOCK slave_preserve_commit_order = 1 open_files_limit = 65535 back_log = 1024 max_connections = 1024 max_connect_errors = 1000000 table_open_cache = 1024 table_definition_cache = 1024 table_open_cache_instances = 64 thread_stack = 512K external-locking = FALSE max_allowed_packet = 32M sort_buffer_size = 4M join_buffer_size = 4M thread_cache_size = 1536 interactive_timeout = 600 wait_timeout = 600 tmp_table_size = 32M max_heap_table_size = 32M slow_query_log = 1 log_timestamps = SYSTEM slow_query_log_file = /data/mysql/mysql_3306/logs/slow.log log-error = /data/mysql/mysql_3306/logs/error.log long_query_time = 0.1 log_queries_not_using_indexes =1 log_throttle_queries_not_using_indexes = 60 min_examined_row_limit = 100 log_slow_admin_statements = 1 log_slow_slave_statements = 1 server-id = 1423306 log-bin = /data/mysql/mysql_3306/logs/mysql-bin sync_binlog = 1 binlog_cache_size = 4M max_binlog_cache_size = 2G max_binlog_size = 1G binlog_expire_logs_seconds=2592000 master_info_repository = TABLE relay_log_info_repository = TABLE gtid_mode = on enforce_gtid_consistency = 1 binlog_checksum=NONE log_slave_updates slave-rows-search-algorithms = 'INDEX_SCAN,HASH_SCAN' binlog_format = row binlog_row_image=FULL relay_log_recovery = 1 relay-log-purge = 1 key_buffer_size = 32M read_buffer_size = 8M read_rnd_buffer_size = 4M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_repair_threads = 1 lock_wait_timeout = 3600 explicit_defaults_for_timestamp = 1 innodb_thread_concurrency = 0 innodb_sync_spin_loops = 100 innodb_spin_wait_delay = 30 #transaction_isolation = REPEATABLE-READ transaction_isolation = READ-COMMITTED #innodb_additional_mem_pool_size = 16M innodb_buffer_pool_size = 2867M innodb_buffer_pool_instances = 4 innodb_buffer_pool_load_at_startup = 1 innodb_buffer_pool_dump_at_shutdown = 1 innodb_data_file_path = ibdata1:1G:autoextend innodb_flush_log_at_trx_commit = 1 innodb_log_buffer_size = 32M innodb_log_file_size = 2G innodb_log_files_in_group = 3 innodb_max_undo_log_size = 4G innodb_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 - 80000 innodb_io_capacity = 4000 innodb_io_capacity_max = 8000 innodb_flush_sync = 0 innodb_flush_neighbors = 0 innodb_write_io_threads = 8 innodb_read_io_threads = 8 innodb_purge_threads = 4 innodb_page_cleaners = 4 innodb_open_files = 65535 innodb_max_dirty_pages_pct = 50 innodb_flush_method = O_DIRECT innodb_lru_scan_depth = 4000 innodb_checksum_algorithm = crc32 innodb_lock_wait_timeout = 10 innodb_rollback_on_timeout = 1 innodb_print_all_deadlocks = 1 innodb_file_per_table = 1 innodb_online_alter_log_max_size = 4G innodb_stats_on_metadata = 0 # some var for MySQL 8 log_error_verbosity = 3 innodb_print_ddl_logs = 1 binlog_expire_logs_seconds = 2592000 #innodb_dedicated_server = 0 innodb_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 = 0 innodb_status_output_locks = 0 #performance_schema performance_schema = 1 performance_schema_instrument = '%memory%=on' performance_schema_instrument = '%lock%=on' #innodb monitor innodb_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] quick max_allowed_packet = 32M [mysqld_safe] #malloc-lib=/usr/local/mysql/lib/jmalloc.so nice=-19 open-files-limit=65535 EOF
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`.bak fi # node1 cat >/data/mysql/mysql_3306/my_3306.cnf <<"EOF" [client] port = 3306 socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock [mysql] prompt="\u@\h \R:\m:\s [\d]> " no-auto-rehash [mysqld] user = mysql port = 3306 admin_address = 127.0.0.1 basedir = /usr/local/mysql datadir = /data/mysql/mysql_3306/data socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock pid-file = mysql_3306.pid character-set-server = utf8mb4 skip_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 = 4 slave_parallel_type = LOGICAL_CLOCK slave_preserve_commit_order = 1 open_files_limit = 65535 back_log = 1024 max_connections = 1024 max_connect_errors = 1000000 table_open_cache = 1024 table_definition_cache = 1024 table_open_cache_instances = 64 thread_stack = 512K external-locking = FALSE max_allowed_packet = 32M sort_buffer_size = 4M join_buffer_size = 4M thread_cache_size = 1536 interactive_timeout = 600 wait_timeout = 600 tmp_table_size = 32M max_heap_table_size = 32M slow_query_log = 1 log_timestamps = SYSTEM slow_query_log_file = /data/mysql/mysql_3306/logs/slow.log log-error = /data/mysql/mysql_3306/logs/error.log long_query_time = 0.1 log_queries_not_using_indexes =1 log_throttle_queries_not_using_indexes = 60 min_examined_row_limit = 100 log_slow_admin_statements = 1 log_slow_slave_statements = 1 server-id = 1433306 log-bin = /data/mysql/mysql_3306/logs/mysql-bin sync_binlog = 1 binlog_cache_size = 4M max_binlog_cache_size = 2G max_binlog_size = 1G binlog_expire_logs_seconds=2592000 master_info_repository = TABLE relay_log_info_repository = TABLE gtid_mode = on enforce_gtid_consistency = 1 binlog_checksum=NONE log_slave_updates slave-rows-search-algorithms = 'INDEX_SCAN,HASH_SCAN' binlog_format = row binlog_row_image=FULL relay_log_recovery = 1 relay-log-purge = 1 key_buffer_size = 32M read_buffer_size = 8M read_rnd_buffer_size = 4M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_repair_threads = 1 lock_wait_timeout = 3600 explicit_defaults_for_timestamp = 1 innodb_thread_concurrency = 0 innodb_sync_spin_loops = 100 innodb_spin_wait_delay = 30 #transaction_isolation = REPEATABLE-READ transaction_isolation = READ-COMMITTED #innodb_additional_mem_pool_size = 16M innodb_buffer_pool_size = 2867M innodb_buffer_pool_instances = 4 innodb_buffer_pool_load_at_startup = 1 innodb_buffer_pool_dump_at_shutdown = 1 innodb_data_file_path = ibdata1:1G:autoextend innodb_flush_log_at_trx_commit = 1 innodb_log_buffer_size = 32M innodb_log_file_size = 2G innodb_log_files_in_group = 3 innodb_max_undo_log_size = 4G innodb_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 - 80000 innodb_io_capacity = 4000 innodb_io_capacity_max = 8000 innodb_flush_sync = 0 innodb_flush_neighbors = 0 innodb_write_io_threads = 8 innodb_read_io_threads = 8 innodb_purge_threads = 4 innodb_page_cleaners = 4 innodb_open_files = 65535 innodb_max_dirty_pages_pct = 50 innodb_flush_method = O_DIRECT innodb_lru_scan_depth = 4000 innodb_checksum_algorithm = crc32 innodb_lock_wait_timeout = 10 innodb_rollback_on_timeout = 1 innodb_print_all_deadlocks = 1 innodb_file_per_table = 1 innodb_online_alter_log_max_size = 4G innodb_stats_on_metadata = 0 # some var for MySQL 8 log_error_verbosity = 3 innodb_print_ddl_logs = 1 binlog_expire_logs_seconds = 2592000 #innodb_dedicated_server = 0 innodb_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 = 0 innodb_status_output_locks = 0 #performance_schema performance_schema = 1 performance_schema_instrument = '%memory%=on' performance_schema_instrument = '%lock%=on' #innodb monitor innodb_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] quick max_allowed_packet = 32M [mysqld_safe] #malloc-lib=/usr/local/mysql/lib/jmalloc.so nice=-19 open-files-limit=65535 EOF
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`.bak fi # node1 cat >/data/mysql/mysql_3306/my_3306.cnf <<"EOF" [client] port = 3306 socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock [mysql] prompt="\u@\h \R:\m:\s [\d]> " no-auto-rehash [mysqld] user = mysql port = 3306 admin_address = 127.0.0.1 basedir = /usr/local/mysql datadir = /data/mysql/mysql_3306/data socket = /data/mysql/mysql_3306/tmp/mysql_3306.sock pid-file = mysql_3306.pid character-set-server = utf8mb4 skip_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 = 4 slave_parallel_type = LOGICAL_CLOCK slave_preserve_commit_order = 1 open_files_limit = 65535 back_log = 1024 max_connections = 1024 max_connect_errors = 1000000 table_open_cache = 1024 table_definition_cache = 1024 table_open_cache_instances = 64 thread_stack = 512K external-locking = FALSE max_allowed_packet = 32M sort_buffer_size = 4M join_buffer_size = 4M thread_cache_size = 1536 interactive_timeout = 600 wait_timeout = 600 tmp_table_size = 32M max_heap_table_size = 32M slow_query_log = 1 log_timestamps = SYSTEM slow_query_log_file = /data/mysql/mysql_3306/logs/slow.log log-error = /data/mysql/mysql_3306/logs/error.log long_query_time = 0.1 log_queries_not_using_indexes =1 log_throttle_queries_not_using_indexes = 60 min_examined_row_limit = 100 log_slow_admin_statements = 1 log_slow_slave_statements = 1 server-id = 1443306 log-bin = /data/mysql/mysql_3306/logs/mysql-bin sync_binlog = 1 binlog_cache_size = 4M max_binlog_cache_size = 2G max_binlog_size = 1G binlog_expire_logs_seconds=2592000 master_info_repository = TABLE relay_log_info_repository = TABLE gtid_mode = on enforce_gtid_consistency = 1 binlog_checksum=NONE log_slave_updates slave-rows-search-algorithms = 'INDEX_SCAN,HASH_SCAN' binlog_format = row binlog_row_image=FULL relay_log_recovery = 1 relay-log-purge = 1 key_buffer_size = 32M read_buffer_size = 8M read_rnd_buffer_size = 4M bulk_insert_buffer_size = 64M myisam_sort_buffer_size = 128M myisam_max_sort_file_size = 10G myisam_repair_threads = 1 lock_wait_timeout = 3600 explicit_defaults_for_timestamp = 1 innodb_thread_concurrency = 0 innodb_sync_spin_loops = 100 innodb_spin_wait_delay = 30 #transaction_isolation = REPEATABLE-READ transaction_isolation = READ-COMMITTED #innodb_additional_mem_pool_size = 16M innodb_buffer_pool_size = 2867M innodb_buffer_pool_instances = 4 innodb_buffer_pool_load_at_startup = 1 innodb_buffer_pool_dump_at_shutdown = 1 innodb_data_file_path = ibdata1:1G:autoextend innodb_flush_log_at_trx_commit = 1 innodb_log_buffer_size = 32M innodb_log_file_size = 2G innodb_log_files_in_group = 3 innodb_max_undo_log_size = 4G innodb_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 - 80000 innodb_io_capacity = 4000 innodb_io_capacity_max = 8000 innodb_flush_sync = 0 innodb_flush_neighbors = 0 innodb_write_io_threads = 8 innodb_read_io_threads = 8 innodb_purge_threads = 4 innodb_page_cleaners = 4 innodb_open_files = 65535 innodb_max_dirty_pages_pct = 50 innodb_flush_method = O_DIRECT innodb_lru_scan_depth = 4000 innodb_checksum_algorithm = crc32 innodb_lock_wait_timeout = 10 innodb_rollback_on_timeout = 1 innodb_print_all_deadlocks = 1 innodb_file_per_table = 1 innodb_online_alter_log_max_size = 4G innodb_stats_on_metadata = 0 # some var for MySQL 8 log_error_verbosity = 3 innodb_print_ddl_logs = 1 binlog_expire_logs_seconds = 2592000 #innodb_dedicated_server = 0 innodb_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 = 0 innodb_status_output_locks = 0 #performance_schema performance_schema = 1 performance_schema_instrument = '%memory%=on' performance_schema_instrument = '%lock%=on' #innodb monitor innodb_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] quick max_allowed_packet = 32M [mysqld_safe] #malloc-lib=/usr/local/mysql/lib/jmalloc.so nice=-19 open-files-limit=65535 EOF
八、修改权限、初始化并启动
chown -R mysql.mysql /data/mysql/mysql_3306 chown -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.21 ln -s /usr/local/mysql/lib/libmysqlclient.so /usr/lib64/ ln -s /usr/local/mysql/lib/libmysqlclient.so.21 /usr/lib64/libmysqlclient.so.21 ln -s /data/mysql/mysql_3306/tmp/mysql_3306.sock /tmp/mysql.sock ln -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 -h127.0.0.1 -P 3306 -uroot -p'GJjumB6g4FcwdF3R6AZc' shutdown &" alias mysql.3306.login="/usr/local/mysql/bin/mysql -h127.0.0.1 -P 3306 -uroot -p'GJjumB6g4FcwdF3R6AZc'" ########## EOF source /root/.bash_profile cat >>/etc/ld.so.conf <<"EOF" /usr/local/mysql/lib EOF ldconfig 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;"
总结
以上所述是小编给大家介绍的mysql 8.0.18 mgr 搭建及其切换功能，希望对大家有所帮助！
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