mysql数据库group_key_【MySQL】数据库复制：组复制（Group Replication）
[root@wallet01?~]#?uuidgen
8d1945a5-5c74-4ba0-8240-e9d731110753
[root@wallet01?~]#?vi?/etc/my.cnf
##單主模型參數
[mysqld]
server-id?=?1
gtid_mode?=?on
enforce_gtid_consistency?=?on
log_bin?=?mysql-bin
binlog_format?=?row
binlog_checksum?=?none
binlog_cache_size?=?16M
max_binlog_cache_size?=?4G
max_binlog_size?=?128M
expire_logs_days?=?7
relay_log?=?relay-bin
master_info_repository?=?table
relay_log_info_repository?=?table
log_slave_updates?=?on
slave_parallel_type?=?LOGICAL_CLOCK
slave_parallel_workers?=?4
slave_preserve_commit_order?=?1
plugin_load_add='group_replication.so'
transaction_write_set_extraction?=?XXHASH64
group_replication_group_name?=?"8d1945a5-5c74-4ba0-8240-e9d731110753"
group_replication_start_on_boot?=?off
group_replication_member_weight?=?40
group_replication_local_address?=?"192.168.1.201:20001"
group_replication_group_seeds="192.168.1.201:20001,192.168.1.202:20001,192.168.1.203:20001"
[root@wallet01?~]#?vi?/etc/my.cnf
##多主模型參數
[mysqld]
group_replication_enforce_update_everywhere_checks?=?on
group_replication_single_primary_mode?=?off
[root@wallet01?~]#?mysql?-uroot?-pabcd@2019
mysql>?grant?replication?slave?on?*.*?to?'repl'@'192.168.1.%'?identified?by?'repl@2019';
Query?OK,?0?rows?affected,?1?warning?(0.02?sec)
mysql>?flush?privileges;
Query?OK,?0?rows?affected?(0.03?sec)
mysql>?reset?master;
Query?OK,?0?rows?affected?(0.10?sec)
mysql>?change?master?to?master_user='repl',master_password='repl@2019'?for?channel?'group_replication_recovery';
Query?OK,?0?rows?affected,?2?warnings?(0.25?sec)
mysql>?set?@@global.group_replication_bootstrap_group=on;
Query?OK,?0?rows?affected?(0.00?sec)
mysql>?start?group_replication;
Query?OK,?0?rows?affected?(2.46?sec)
mysql>?set?@@global.group_replication_bootstrap_group=off;
Query?OK,?0?rows?affected?(0.00?sec)
mysql>?select?*?from?performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
|?CHANNEL_NAME??????????????|?MEMBER_ID????????????????????????????|?MEMBER_HOST?|?MEMBER_PORT?|?MEMBER_STATE?|
+---------------------------+--------------------------------------+-------------+-------------+--------------+
|?group_replication_applier?|?d386a328-5494-11eb-8ff3-000c29f06629?|?wallet01????|????????3306?|?ONLINE???????|
+---------------------------+--------------------------------------+-------------+-------------+--------------+
1?row?in?set?(0.00?sec)
mysql>??create?user?xtrabackup@'localhost'?identified?by?'xtrabackup@2019';
Query?OK,?0?rows?affected?(0.07?sec)
mysql>?grant?reload,lock?tables,replication?client,process?on?*.*?to?xtrabackup@'localhost';
Query?OK,?0?rows?affected?(0.02?sec)
mysql>?flush?privileges;
Query?OK,?0?rows?affected?(0.03?sec)
[root@wallet01?~]#?su?-?mysql
[mysql@wallet01?~]$?ssh-keygen
[mysql@wallet01?~]$?ssh-copy-id?-i?~/.ssh/id_rsa.pub?mysql@wallet02
[mysql@wallet01?~]$?ssh-copy-id?-i?~/.ssh/id_rsa.pub?mysql@wallet03
[mysql@wallet01?~]$?ssh?wallet02?date
Mon?Feb?18?10:41:16?CST?2019
[mysql@wallet01?~]$?ssh?wallet03?date
Mon?Feb?18?10:42:30?CST?2019
[mysql@wallet01?~]$?xtrabackup?--backup?--user=xtrabackup?--password=xtrabackup@2019?--stream=tar?|?ssh?mysql@wallet02?\?"gzip?>/home/mysql/backup/`date?'+%Y-%m-%d_%H-%M-%S'`.tar.gz"
[mysql@wallet01?~]$?xtrabackup?--backup?--user=xtrabackup?--password=xtrabackup@2019?--stream=tar?|?ssh?mysql@wallet03?\?"gzip?>/home/mysql/backup/`date?'+%Y-%m-%d_%H-%M-%S'`.tar.gz"
[root@wallet02?~]#?vi?/etc/my.cnf
[mysqld]
server-id?=?2
gtid_mode?=?on
enforce_gtid_consistency?=?on
log_bin?=?mysql-bin
binlog_format?=?row
binlog_checksum?=?none
binlog_cache_size?=?16M
max_binlog_cache_size?=?4G
max_binlog_size?=?128M
expire_logs_days?=?7
relay_log?=?relay-bin
master_info_repository?=?table
relay_log_info_repository?=?table
log_slave_updates?=?on
slave_parallel_type?=?LOGICAL_CLOCK
slave_parallel_workers?=?4
slave_preserve_commit_order?=?1
plugin_load_add='group_replication.so'
transaction_write_set_extraction?=?XXHASH64
group_replication_group_name?=?"8d1945a5-5c74-4ba0-8240-e9d731110753"
group_replication_start_on_boot?=?off
group_replication_member_weight?=?30
group_replication_local_address?=?"192.168.1.202:20001"
group_replication_group_seeds="192.168.1.201:20001,192.168.1.202:20001,192.168.1.203:20001"
[root@wallet02?~]#?su?-?mysql
[mysql@wallet02?~]$?cd?backup
[mysql@wallet02?backup]$?tar?izxvf?2019-08-22_10-48-1.tar.gz
[mysql@wallet02?backup]$?xtrabackup?--prepare?--target-dir=/home/mysql/backup
[mysql@wallet02?backup]$?xtrabackup?--copy-back?--target-dir=/home/mysql/backup
[mysql@wallet02?backup]$?cat?xtrabackup_binlog_info
mysql-bin.000001????????50522845????????8d1945a5-5c74-4ba0-8240-e9d731110753:1-10758
[root@wallet02?~]#?service?mysqld?start
Logging?to?'/var/lib/mysql/wallet02.err'.
Starting?mysqld:???????????????????????????????????????????[??OK??]
[root@wallet02?~]#?mysql?-uroot?-pabcd@2019
mysql>?set?global?gtid_purged='8d1945a5-5c74-4ba0-8240-e9d731110753:1-10758';
Query?OK,?0?rows?affected?(0.02?sec)
mysql>?change?master?to?master_user='repl',master_password='repl@2019'?for?channel?'group_replication_recovery';
Query?OK,?0?rows?affected,?2?warnings?(0.11?sec)
mysql>?start?group_replication;
Query?OK,?0?rows?affected?(5.91?sec)
mysql>?select?*?from?performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
|?CHANNEL_NAME??????????????|?MEMBER_ID????????????????????????????|?MEMBER_HOST?|?MEMBER_PORT?|?MEMBER_STATE?|
+---------------------------+--------------------------------------+-------------+-------------+--------------+
|?group_replication_applier?|?d386a328-5494-11eb-8ff3-000c29f06629?|?wallet02????|????????3306?|?ONLINE???????|
|?group_replication_applier?|?da0cec61-549c-11eb-a0a4-000c29bd9bc5?|?wallet01????|????????3306?|?ONLINE???????|
+---------------------------+--------------------------------------+-------------+-------------+--------------+
2?rows?in?set?(0.00?sec)
[root@wallet03?~]#?vi?/etc/my.cnf
[mysqld]
server-id?=?3
gtid_mode?=?on
enforce_gtid_consistency?=?on
log_bin?=?mysql-bin
binlog_format?=?row
binlog_checksum?=?none
binlog_cache_size?=?16M
max_binlog_cache_size?=?4G
max_binlog_size?=?128M
expire_logs_days?=?7
relay_log?=?relay-bin
master_info_repository?=?table
relay_log_info_repository?=?table
log_slave_updates?=?on
slave_parallel_type?=?LOGICAL_CLOCK
slave_parallel_workers?=?4
slave_preserve_commit_order?=?1
plugin_load_add='group_replication.so'
transaction_write_set_extraction?=?XXHASH64
group_replication_group_name?=?"8d1945a5-5c74-4ba0-8240-e9d731110753"
group_replication_start_on_boot?=?off
group_replication_member_weight?=?20
group_replication_local_address?=?"192.168.1.203:20001"
group_replication_group_seeds="192.168.1.201:20001,192.168.1.202:20001,192.168.1.203:20001"
[root@wallet03?~]#?su?-?mysql
[mysql@wallet03?~]$?cd?backup
[mysql@wallet03?backup]$?tar?izxvf?2019-08-22_11-03-21.tar.gz
[mysql@wallet03?backup]$?xtrabackup?--prepare?--target-dir=/home/mysql/backup
[mysql@wallet03?backup]$?xtrabackup?--copy-back?--target-dir=/home/mysql/backup
[mysql@wallet03?backup]$?cat?xtrabackup_binlog_info
mysql-bin.000001????????50523169????????8d1945a5-5c74-4ba0-8240-e9d731110753:1-10759
[root@wallet03?~]#?service?mysqld?start
Logging?to?'/var/lib/mysql/wallet03.err'.
Starting?mysqld:???????????????????????????????????????????[??OK??]
[root@wallet03?~]#?mysql?-uroot?-pabcd@2019
mysql>?set?global?gtid_purged='8d1945a5-5c74-4ba0-8240-e9d731110753:1-10759';
Query?OK,?0?rows?affected?(0.04?sec)
mysql>?change?master?to?master_user='repl',master_password='repl@2019'?for?channel?'group_replication_recovery';
Query?OK,?0?rows?affected,?2?warnings?(0.13?sec)
mysql>?start?group_replication;
Query?OK,?0?rows?affected?(3.39?sec)
mysql>?select?*?from?performance_schema.replication_group_members;
+---------------------------+--------------------------------------+-------------+-------------+--------------+
|?CHANNEL_NAME??????????????|?MEMBER_ID????????????????????????????|?MEMBER_HOST?|?MEMBER_PORT?|?MEMBER_STATE?|
+---------------------------+--------------------------------------+-------------+-------------+--------------+
|?group_replication_applier?|?d386a328-5494-11eb-8ff3-000c29f06629?|?wallet01????|????????3306?|?ONLINE???????|
|?group_replication_applier?|?da0cec61-549c-11eb-a0a4-000c29bd9bc5?|?wallet02????|????????3306?|?ONLINE???????|
|?group_replication_applier?|?f11984e0-549d-11eb-b271-000c29906702?|?wallet03????|????????3306?|?ONLINE???????|
+---------------------------+--------------------------------------+-------------+-------------+--------------+
3?rows?in?set?(0.00?sec)
mysql>?show?status?like?'group_replication_primary_member';
+----------------------------------+--------------------------------------+
|?Variable_name????????????????????|?Value????????????????????????????????|
+----------------------------------+--------------------------------------+
|?group_replication_primary_member?|?d386a328-5494-11eb-8ff3-000c29f06629?|
+----------------------------------+--------------------------------------+
1?row?in?set?(0.00?sec)
mysql>?select?*?from?performance_schema.replication_group_member_stats\G;
***************************?1.?row?***************************
CHANNEL_NAME:?group_replication_applier
VIEW_ID:?16104300602378309:3
MEMBER_ID:?f11984e0-549d-11eb-b271-000c29906702
COUNT_TRANSACTIONS_IN_QUEUE:?0
COUNT_TRANSACTIONS_CHECKED:?3825
COUNT_CONFLICTS_DETECTED:?0
COUNT_TRANSACTIONS_ROWS_VALIDATING:?18
TRANSACTIONS_COMMITTED_ALL_MEMBERS:?8d1945a5-5c74-4ba0-8240-e9d731110753:1-3851
LAST_CONFLICT_FREE_TRANSACTION:?8d1945a5-5c74-4ba0-8240-e9d731110753:3851
1?row?in?set?(0.00?sec)組復制限制
僅支持innodb引擎的表，能夠創建非innodb引擎的表，但是無法寫入數據，向非innodb表寫數據直接報錯。
mysql>?create?table?tb_myisam(id?int,?name?varchar(50),?primary?key(id))?engine=myisam;
Query?OK,?0?rows?affected?(0.05?sec)
mysql>?insert?into?tb_myisam?select?1,?'1';
ERROR?3098?(HY000):?The?table?does?not?comply?with?the?requirements?by?an?external?plugin.
僅支持innodb引擎的表，并且該表必須有顯式的主鍵，或者非Null的唯一鍵，否則即使能夠創建表，也無法向表中寫入數據。
#?創建沒有主鍵的表，寫入數據失敗
mysql>?create?table?tb_no_primary_key(name?varchar(50));
Query?OK,?0?rows?affected?(0.15?sec)
mysql>?insert?into?tb_no_primary_key?select?'1';
ERROR?3098?(HY000):?The?table?does?not?comply?with?the?requirements?by?an?external?plugin.
#?創建Null唯一索引的表，寫入數據失敗
mysql>?create?table?tb_null_unique_key(name?varchar(50),?unique?key(name));
Query?OK,?0?rows?affected?(0.09?sec)
mysql>?insert?into?tb_null_unique_key?select?'1';
ERROR?3098?(HY000):?The?table?does?not?comply?with?the?requirements?by?an?external?plugin.
#?創建非Null唯一索引的表，寫入數據成功
mysql>?create?table?tb_no_null_unique_key(name?varchar(50)?not?null,?unique?key(name));
Query?OK,?0?rows?affected?(0.04?sec)
mysql>?insert?into?tb_no_null_unique_key?select?'1';
Query?OK,?1?row?affected?(0.06?sec)
Records:?1??Duplicates:?0??Warnings:?0
GTID限制
CREATE?TABLE?…?SELECT語句不支持
因為該語句會被拆分成?CREATE?TABLE?和?INSERT?兩個事務，并且這個兩個事務被分配了同一個?GTID，這會導致?INSERT?被備庫忽略掉。
mysql>?create?table?history01?select?*?from?history;
ERROR?1786?(HY000):?Statement?violates?GTID?consistency:?CREATE?TABLE?...?SELECT.
解決方法
mysql>?create?table?history01?like?history;
Query?OK,?0?rows?affected?(0.32?sec)
mysql>?insert?into?history01?select?*?from?history;
Query?OK,?301277?rows?affected?(7.27?sec)
Records:?301277??Duplicates:?0??Warnings:?0
臨時表事務內部不能執行
創建臨時表語句，但可以在事務外執行，但必須設置?set?autocommit=1?。另外?procedures,?functions,?and?triggers在使用GTID時不能?CREATE?TEMPORARY?TABLE?and?DROP?TEMPORARY?TABLE?語句
mysql>?begin;
Query?OK,?0?rows?affected?(0.00?sec)
mysql>?create?temporary?table?test(id?INT);
ERROR?1787?(HY000):?Statement?violates?GTID?consistency:?CREATE?TEMPORARY?TABLE?and?DROP?TEMPORARY?TABLE?can?only?be?executed?outside?transactional?context.
These?statements?are?also?not?allowed?in?a?function?or?trigger?because?functions?and?triggers?are?also?considered?to?be?multi-statement?transactions.
總結
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