• centos6.10中部署percona-mysql双实例的方法


    centos6.10中部署percona-mysql双实例的方法

    数据库的同步关系:192.168.11.53(master) --> slave(192.168.10.189) --> task slave:3307(192.168.11.53)

    1.新增配置文件
    2.使用新的配置文件初始化数据库
    3.启动数据库
    4.升级root密码并新增task系统的用户


    背景:cms内容管理系统和task任务发布系统(即把html/css/js/图片等内容发布到海外的系统)在同一台服务器中

    使用相同的mysql数据库实例,不同数据库

    观察发现系统做了大量的关于task系统的查询,耗费了数据库性能

    为了避免task和cmsx不相互影响,启用新的mysql实例,将数据库剥离开

    不同的应用使用不同的数据库实例


    即在cms服务器中同时启动监听 3306 和 3307 的mysql数据库


    一、启动新的3307示例,并把task作为192.168.10.189的slave

    1.将目标数据库task从 192.168.10.189 从库中备份出来,并记录position作为新实例同步依据
    mysqldump -uroot -p -S /tmp/mysql.sock -B -F -R --skip-add-locks --single-transaction --triggers --routines --events --skip-tz-utc task > /opt/task_$(date +%F).sql

    # 记录下主库的position
    mysql> show master status;
    +------------------+-----------+--------------+------------------+-------------------+
    | File             | Position  | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
    +------------------+-----------+--------------+------------------+-------------------+
    | mysql-bin.000532 | 100722038 |              |                  |                   |
    +------------------+-----------+--------------+------------------+-------------------+
    1 row in set (0.00 sec)

    2.启动新的实例,并导入task数据库
    新增数据库配置(启动3307端口使用的配置)
    注意:需要将不同步的数据库排除:
    replicate-ignore-db                                         = mysql
    replicate_wild_ignore_table                                = mysql.%

    [root@newcms:/usr/local/mysql-sniffer]# cat /etc/my_3307.cnf
    # Example MySQL config file for medium systems.
    # 8核 16G
    # This is for a system with little memory (16G) where MySQL plays
    [client]
    #password       = your_password
    port                                                        = 3307
    socket                                                      = /tmp/mysql3307.sock

    # The MySQL server
    [mysqld]
    user                                                        = mysql
    port                                                        = 3307
    bind-address                                                = 0.0.0.0
    socket                                                      = /tmp/mysql3307.sock
    datadir                                                     = /data/mysql_data_3307
    pid-file                                                    = /data/mysql_data_3307/mysql.pid
    basedir                                                     = /usr/local/mysql3307
    tmpdir                                                      = /tmp

    #此开关默认为NULL,即不允许导入导出。
    #secure-file-priv                                           = /opt/upload

    #-------------------------------gobal variables------------------------#
    #默认关闭,涉及到timestamp类型的列自动更新的问题
    explicit_defaults_for_timestamp                 = 1
    ###transaction_write_set_extraction              = XXHASH64  #以便在server收集写集合的同时将其记录到二进制日志。并且是行更改后的唯一标识此标识将用于检测冲突。
    ###loose-group_replication_group_name            = 'ce9be252-2b71-11e6-b8f4-00212889f856' #组的名字可以随便起,但不能用主机的GTID
    ###loose-group_replication_start_on_boot         = off  #为了避免每次启动自动引导具有相同名称的第二个组,所以设置为OFF。
    ###loose-group_replication_bootstrap_group       = off #同上
    ###loose-group_replication_local_address         = '192.168.1.88:33071' #写自己主机所在IP
    ###loose-group_replication_group_seeds           ='192.168.1.88:33071,192.168.1.89:33071,192.168.1.90:33071'
    ###loose-group_replication_single_primary_mode   = off  #关闭单主模式的参数
    ###loose-group_replication_enforce_update_everywhere_checks = on #开启多主模式的参数

    skip-external-locking
    skip-name-resolve
    skip-ssl

    #memory is 16G
    key_buffer_size                                             = 32M
    table_open_cache                                            = 2048
    table_definition_cache                                      = 1024
    sort_buffer_size                                            = 4M
    net_buffer_length                                           = 32K
    read_buffer_size                                            = 4M
    read_rnd_buffer_size                                        = 16M

    open_files_limit                                            = 10000
    thread_cache_size                                           = 400
    query_cache_type                                            = 0
    query_cache_size                                            = 32M
    max_write_lock_count                                        = 300
    wait_timeout                                                = 120
    interactive_timeout                                         = 120
    net_read_timeout                                            = 120
    net_write_timeout                                           = 120

    max_connections                                             = 800
    max_user_connections                                        = 750
    max_connect_errors                                          = 10000
    max_allowed_packet                                          = 512M
    back_log                                                    = 2048
    log_timestamps                                              = system
    performance_schema                                          = OFF
    character_set_server                                        = utf8mb4

    ##当链接数耗尽后,通过设置别用端口,让root可以登录
    extra_max_connections                                       = 2
    extra_port                                                  = 13307

    ###让mysql不区分大小写敏感
    lower_case_table_names                                      = 1

    #explicit_defaults_for_timestamp                            = 1

    #----------------Myisam--------------------------------#
    myisam_recover_options                                      = DEFAULT
    bulk_insert_buffer_size                                     = 64M
    myisam_sort_buffer_size                                     = 128M
    myisam_max_sort_file_size                                   = 512M
    myisam_repair_threads                                       = 1

    #if the query is exec time great than 2 seconds, the query will log to slow log if slowlog is enabled.
    long_query_time                                             = 1
    slow_query_log                                              = On
    slow-query-log-file                                         = /data/mysql_data_3307/slow.log
    show_compatibility_56                                       = on

    # Don't listen on a TCP/IP port at all. This can be a security enhancement,
    # if all processes that need to connect to mysqld run on the same host.
    # All interaction with mysqld must be made via Unix sockets or named pipes.
    # Note that using this option without enabling named pipes on Windows
    # (via the "enable-named-pipe" option) will render mysqld useless!
    #
    #skip-networking

    #----------------------------MySQL Log----------------#
    # Replication Master Server (default)
    # binary logging is required for replication
    log-bin                                                     = mysql-bin
    expire_logs_days                                            = 20
    log_error                                                   = error.log
    log_error_verbosity                                         = 1
    log_warnings                                                = 1

    # binary logging format - mixed recommended
    binlog_format                                               = row
    relay-log                                                   = mysql-relay-bin
    relay-log-index                                             = relay.index
    # required unique id between 1 and 2^32 - 1
    server-id                                                   = 1
    sql-mode                                                    = "NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
    #sql-mode                                                    = "NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"
    sync_binlog                                                 = 1
    log_slave_updates                                           = 1
    #binlog_checksum                                            = NONE

    #------------------------------replicate--------------#
    #排除不需要同步的库表
    replicate-ignore-db                                        = mysql
    replicate-ignore-db                                        = sys
    replicate-ignore-db                                         = information_schema
    replicate-ignore-db                                         = performance_schema
    replicate-ignore-db                                         = undolog
    replicate-ignore-db                                         = for_nagios
    replicate-ignore-db                                         = undolog
    replicate-ignore-db                                         = akamai_task
    replicate-ignore-db                                         = bugfree
    replicate-ignore-db                                         = cart_jp
    replicate-ignore-db                                         = cms123
    replicate-ignore-db                                         = cms_com_br
    replicate-ignore-db                                         = cms_com_mx
    replicate-ignore-db                                         = cms_de
    replicate-ignore-db                                         = cms_de_new
    replicate-ignore-db                                         = cms_es
    replicate-ignore-db                                         = cms_fr
    replicate-ignore-db                                         = cms_freecms
    replicate-ignore-db                                         = cms_global
    replicate-ignore-db                                         = cms_it
    replicate-ignore-db                                         = cms_traffic
    replicate-ignore-db                                         = cmscouponcode
    replicate-ignore-db                                         = cmsnet
    replicate-ignore-db                                         = cmsphoto
    replicate-ignore-db                                         = cmstask
    replicate-ignore-db                                         = ftp_db
    replicate-ignore-db                                         = pt_monitor
    replicate-ignore-db                                         = task_bak
    replicate-ignore-db                                         = test
    replicate-ignore-db                                         = ws_amvdb
    replicate-ignore-db                                         = ws_dm_device
    replicate-ignore-db                                         = ws_fantashow30
    replicate-ignore-db                                         = wsjp_cart

    replicate_wild_ignore_table                                = mysql.%
    replicate_wild_ignore_table                                = sys.%
    replicate_wild_ignore_table                                 = information_schema.%
    replicate_wild_ignore_table                                 = performance_schema.%
    replicate_wild_ignore_table                                 = undolog.%
    replicate_wild_ignore_table                                 = for_nagios.%
    replicate_wild_ignore_table                                 = undolog.%
    replicate_wild_ignore_table                                 = akamai_task.%
    replicate_wild_ignore_table                                 = bugfree.%
    replicate_wild_ignore_table                                 = cart_jp.%
    replicate_wild_ignore_table                                 = cms123.%
    replicate_wild_ignore_table                                 = cms_com_br.%
    replicate_wild_ignore_table                                 = cms_com_mx.%
    replicate_wild_ignore_table                                 = cms_de.%
    replicate_wild_ignore_table                                 = cms_de_new.%
    replicate_wild_ignore_table                                 = cms_es.%
    replicate_wild_ignore_table                                 = cms_fr.%
    replicate_wild_ignore_table                                 = cms_freecms.%
    replicate_wild_ignore_table                                 = cms_global.%
    replicate_wild_ignore_table                                 = cms_it.%
    replicate_wild_ignore_table                                 = cms_traffic.%
    replicate_wild_ignore_table                                 = cmscouponcode.%
    replicate_wild_ignore_table                                 = cmsnet.%
    replicate_wild_ignore_table                                 = cmsphoto.%
    replicate_wild_ignore_table                                 = cmstask.%
    replicate_wild_ignore_table                                 = ftp_db.%
    replicate_wild_ignore_table                                 = pt_monitor.%
    replicate_wild_ignore_table                                 = task_bak.%
    replicate_wild_ignore_table                                 = test.%
    replicate_wild_ignore_table                                 = ws_amvdb.%
    replicate_wild_ignore_table                                 = ws_dm_device.%
    replicate_wild_ignore_table                                 = ws_fantashow30.%
    replicate_wild_ignore_table                                 = wsjp_cart.%

    #主主复制需要开启
    #auto_increment_offset= 2
    #auto_increment_increment= 2

    #GTID模式复制,需要开启如下
    #gtid_mode                                                  = ON
    #enforce_gtid_consistency                                   = ON

    #并发复制
    slave-parallel-type                                         = LOGICAL_CLOCK
    slave-parallel-workers                                      = 0
    master_info_repository                                      = TABLE
    relay_log_info_repository                                   = TABLE
    relay_log_recovery                                          = ON

    #跳过slave进程启动参数
    #skip-slave-start

    #如果实例为从库,则需要设置为on
    #read_only                                                   = on

    #skip-grant-tables

    #--------------------------------------------------------innoDB------------#
    innodb_rollback_on_timeout
    # Uncomment the following if you are using InnoDB tables
    innodb_data_home_dir                                        = /data/mysql_data_3307
    innodb_data_file_path                                       = ibdata1:1G;ibdata2:1G:autoextend
    innodb_log_group_home_dir                                   = /data/mysql_data_3307
    innodb_undo_directory                                       = /data/mysql_data_3307/undolog/
    innodb_undo_logs                                            = 128
    innodb_undo_tablespaces                                     = 3

    # You can set .._buffer_pool_size up to 50 - 80 %
    #innodb_use_sys_malloc = 0
    #innodb_page_size = 8192
    innodb_buffer_pool_size                                     = 32G
    innodb_buffer_pool_instances                                = 1
    #innodb_additional_mem_pool_size = 8M

    # Set .._log_file_size to 25 % of buffer pool size
    innodb_log_file_size                                        = 256M
    innodb_log_buffer_size                                      = 64M
    innodb_log_files_in_group                                   = 3
    #每次事务提交时MySQL都会把log buffer的数据写入log file,并且flush(刷到磁盘)中去,该模式为系统默认
    innodb_flush_log_at_trx_commit                              = 1
    innodb_lock_wait_timeout                                    = 120
    #启用独立表空间
    innodb_file_per_table                                       = 1

    #CPU是1颗8核的,那么可以设置
    innodb_read_io_threads                                      = 8
    innodb_write_io_threads                                     = 8

    #默认是0,则表示没有并发线程数限制,所有请求都会直接请求线程执行,当并发用户线程数量小于64,建议设置innodb_thread_concurrency=0,在大多数情况下,最佳的值是小于并接近虚拟CPU的个数
    innodb_thread_concurrency                                   = 12
    innodb_max_dirty_pages_pct                                  = 75
    innodb_flush_method                                         = O_DIRECT

    innodb_purge_threads                                        = 10
    innodb_large_prefix                                         = 1

    #参数待测试
    #innodb_io_capacity                                         = 20000
    #innodb_io_capacity_max                                     = 40000

    #根据CPU核心数来设定
    thread_pool_size                                            = 8
    #thread_handling = pool-of-threads
    thread_pool_oversubscribe                                   = 24

    #thread_handling                             = pool-of-threads
    thread_pool_stall_limit                                     = 100
    thread_pool_max_threads                                     = 30

    #解释: 在启动时把热数据加载到内存。
    innodb_buffer_pool_load_at_startup                          = 1
    #解释: 在关闭时把热数据dump到本地磁盘
    innodb_buffer_pool_dump_at_shutdown                         = 1

    ##默认是8M, 如果一次insert数据量比较多的话, 可以适当增加
    innodb_autoextend_increment                                 = 32

    [mysqldump]
    quick
    max_allowed_packet                                          = 512M

    [mysql]
    no-auto-rehash
    # Remove the next comment character if you are not familiar with SQL
    #safe-updates

    [myisamchk]
    #key_buffer_size = 20M
    #sort_buffer_size = 20M
    key_buffer_size                                             = 200M
    sort_buffer_size                                            = 200M
    read_buffer                                                 = 2M
    write_buffer                                                = 2M

    [mysqld_safe]
    #控制文件打开数的show global status like 'open%file%';比较合适的设置:Open_files / open_files_limit * 100% <= 75%
    open-files-limit                                            = 65535
    log-error                                                   = /data/mysql_data_3307/error.log

    [mysqlhotcopy]
    interactive-timeout


    3.初始化并启动3307示例数据库
    /usr/local/mysql3307/bin/mysqld --defaults-file=/etc/my_3307.cnf --initialize-insecure --user=mysql --basedir=/usr/local/mysql3307 --datadir=/data/mysql_data_3307

    nohup /usr/local/percona-server-5.7.24/bin/mysqld_safe --defaults-file=/etc/my_3307.cnf &

    4.导入task库到新实例中

    5.启动主从同步 3307 的task --> 192.168.10.189(master)

    mysql> show master status;
    +------------------+-----------+--------------+------------------+-------------------+
    | File             | Position  | Binlog_Do_DB | Binlog_Ignore_DB | Executed_Gtid_Set |
    +------------------+-----------+--------------+------------------+-------------------+
    | mysql-bin.000532 | 100722038 |              |                  |                   |
    +------------------+-----------+--------------+------------------+-------------------+

    change master to master_host='192.168.10.189',master_user='rep',master_password='wsdb123',master_log_file='mysql-bin.000532',master_log_pos=100722038;


    # sql shell命令行 下执行 关闭数据库的命令
    # shutdown;


    # 添加备份用户
    GRANT RELOAD, PROCESS, SUPER, LOCK TABLES, REPLICATION CLIENT, CREATE TABLESPACE ON *.* TO 'xtrabackup'@'localhost' identified by 'pass';
    flush privileges;

    # 新增只对127.0.0.1有权限的root链接账号
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'127.0.0.1' IDENTIFIED BY 'pass' WITH GRANT OPTION;
    flush privileges;

    # 修改root用户密码
    update mysql.user set authentication_string = password('pass'), password_expired = 'N', password_last_changed = now() where user = 'root';

    # 对单个数据库授权
    grant select,insert,update,delete on task.* to task_user_write@"%" identified by "pass";



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  • 原文地址:https://www.cnblogs.com/reblue520/p/11607546.html
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