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/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=http://www.yisu.com/usr/local/mysql/lib/jmalloc.so nice=-19 open-files-limit=65535 EOF

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