mysql 8.0.18 mgr 搭建及其切换功能

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