mysql 8.0.16 单主 mgr搭建
环境介绍：
192.168.142.142 db142
192.168.142.143 db143
192.168.142.145 db145
1、安装依赖包
yum -y install make gcc-c++ cmake bison-devel ncurses-devel readline-devel libaio-devel perl libaio wget lrzsz vim libnuma* bzip2 xz
2、关闭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
3、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
# 配置每台hosts主机解析
cat >> /etc/hosts <<"EOF"
192.168.142.142 db142
192.168.142.143 db143
192.168.142.145 db145
EOF
4、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
5、社区版 8.0.16 下载
cd /opt/
wget https://dev.mysql.com/get/Downloads/MySQL-8.0/mysql-8.0.16-linux-glibc2.12-x86_64.tar.xz
# 解压安装包
tar -xJf mysql-8.0.16-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-8.0.16-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/{data,logs,tmp,undolog}
6、配置文件
# node1
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 = "192.168.142.142:33006" #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 = "192.168.142.142:33006,192.168.142.143:33006,192.168.142.145:33006" #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
my.cnf
# node2
# node2
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 = "192.168.142.143:33006" #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 = "192.168.142.142:33006,192.168.142.143:33006,192.168.142.145:33006" #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
my.cnf
# node3
# node3
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 = 1453306
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 = "192.168.142.145:33006" #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 = "192.168.142.142:33006,192.168.142.143:33006,192.168.142.145:33006" #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
my.cnf
7、修改目录权限
chown -R mysql.mysql /data/mysql/mysql_3306
chown -R mysql.mysql /usr/local/mysql/
8、初始化数据库
# /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 &
9、查看日志
# tail -f /data/mysql/mysql_3306/logs/error.log
# 10、启动数据库
/usr/local/mysql/bin/mysqld_safe --defaults-file=/data/mysql/mysql_3306/my_3306.cnf &
ln -s /usr/local/mysql/bin/* /usr/bin/
ln -s /usr/local/mysql/lib/* /usr/lib64/
ln -s /data/mysql/mysql_3306/tmp/mysql_3306.sock /tmp/mysql.sock
11、配置mgr第一个主节点 192.168.142.142
# 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;
12、配置另外两节点，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;
# 13、查看mgr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 | 81887515-6ded-11e9-a307-000c29508dcb | db143 | 3306 | ONLINE | SECONDARY | 8.0.16 |
| group_replication_applier | 8f953e27-8c25-11e9-a39e-000c29c2e60a | db142 | 3306 | ONLINE | PRIMARY | 8.0.16 |
| group_replication_applier | b2f0bfdc-87db-11e9-b83d-000c298bc91b | db145 | 3306 | ONLINE | SECONDARY | 8.0.16 |
+---------------------------+--------------------------------------+-------------+-------------+--------------+-------------+----------------+
3 rows in set (0.00 sec)
14、创建测试数据
create database test;
use test;
create table test(id int primary key,name varchar(10));
insert into test values(1,'jacky');
15、常见故障
############################### 常见故障 ###############################
mysql> START GROUP_REPLICATION;
ERROR 3092 (HY000): The server is notconfigured properly to be an active member of the group. Please see moredetails on error log.
【解决办法】：
mysql> SET GLOBALgroup_replication_bootstrap_group = ON;
Query OK, 0 rows affected (0.00 sec)
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (1.03 sec)
16、使用组复制的基础要求
1、必须使用innodb引擎，冲突时要回滚，使用其他引擎可能会数据不一致。
2、每个表都要求显示定义主键，用于冲突检测识别。
3、开启GTID，通过GTID来追踪各事务在各机器上的情况 。
4、binlog使用row模式，确保各机器数据的一致性。
5、使用READ COMMITTED的隔离级别来规避Gap Locks。
