Detailed introduction to the construction and deployment process of MySQL Group Replication [Multi-Primary Mode] (pictures and text)

1,AboutMySQL Group Replication

Group-basedReplication is a A technique used in fault-tolerant systems. Replication-group is composed of multiple servers (nodes) that can communicate with each other.

In the communication layer, Groupreplication implements a series of mechanisms: such as atomic message delivery and total ordering of messages. These atomic and abstract mechanisms provide strong support for implementing more advanced database replication solutions.

MySQL Group Replication implements a multi-master, fully updated replication protocol based on these technologies and concepts.

In short, a Replication-group is a group of nodes. Each node can execute transactions independently, and read and write transactions will be coordinated with other nodes in the group before committing.

Therefore, when a transaction is ready to be submitted, it will automatically broadcast atomically within the group to inform other nodes of what content has been changed/what transactions have been performed.

This atomic broadcast method keeps this transaction in the same order on every node.

This means that each node receives the same transaction log in the same order, so each node replays these transaction logs in the same order, and ultimately the entire group maintains a completely consistent state.

However, there may be resource contention between transactions executed on different nodes. This phenomenon easily occurs in two different concurrent transactions.

Suppose there are two concurrent transactions on different nodes that update the same row of data, then resource contention will occur.

Faced with this situation, GroupReplication determines that the transaction submitted first is a valid transaction and will be repeated in the entire group. The transaction submitted later will be directly interrupted, or rolled back, and finally discarded.

Therefore, this is also a shared-nothing replication scheme, and each node saves a complete copy of the data. See the following picture 01.png, which describes the specific workflow and can be compared with other solutions concisely. This replication scheme is, to some extent, similar to the Replication method of the database state machine (DBSM).

2, install mysql 5.7.17

Official download, but the official only keeps the latest version. The url address 5.7.17 may not be valid for a long time, so it may not be necessary. I have kept it on Baidu Cloud Disk. The version is 5.7.17 and can be used at any time. Go to download and use,

Set /etc/hosts mapping on the three db servers, as follows:

192.168.121.71    db1                                                                                                            
192.168.121.111    db2
192.168.121.24    db3

Installed database server:

192.168.121.71 (db1) 3317/ data/mysql/data is set on db1, db2, and db3

Database Server Address
12001	##192.168.121.111 (db2)	3317	/data/mysql/data
12002	192.168.121.24 (db3)	3317	/data/mysql/data
12003		3 , create a replication environment	Set hostname And ip mapping

##

vim /etc/hosts
192.168.121.71 db1 hch_test_dbm2_121_71                                           
192.168.121.111 db2 bpe_service
192.168.121.24 db3 hch_test_web_1_24

在db1/db2/db3上建立复制账号：

mysql> SET SQL_LOG_BIN=0;
Query OK, 0 rows affected (0.00 sec)
 
mysql>
mysql> GRANT REPLICATION SLAVE ON *.*  TO 'repl'@'192.168.%' IDENTIFIED BY 'rlpbright_1927@ys';
Query OK, 0 rows affected, 1 warning  (0.00 sec)
 
mysql>  
mysql> SET SQL_LOG_BIN=1;
Query OK, 0 rows affected (0.00 sec)
 
mysql>

4，安装group replication插件

在db1、db2、db3上依次安装group replication插件

mysql> INSTALL PLUGIN group_replication  SONAME 'group_replication.so';                         
Query OK, 0 rows affected (0.01 sec)
 
mysql>

plugin-load=group_replication或者直接在配置文件my.cnf中配置：

查看group replication组件

mysql> show plugins;                                                                                                        
+----------------------------+----------+--------------------+----------------------+---------+
| Name                       | Status   | Type               | Library              | License |
+----------------------------+----------+--------------------+----------------------+---------+
| binlog                     | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| mysql_native_password      | ACTIVE   | AUTHENTICATION     | NULL                 | GPL     |
| sha256_password            | ACTIVE   | AUTHENTICATION     | NULL                 | GPL     |
| MyISAM                     | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| PERFORMANCE_SCHEMA         | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| InnoDB                     | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| INNODB_TRX                 | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_LOCKS               | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_LOCK_WAITS          | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_CMP                 | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_CMP_RESET           | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_CMPMEM              | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_CMPMEM_RESET        | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_CMP_PER_INDEX       | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_CMP_PER_INDEX_RESET | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_BUFFER_PAGE         | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_BUFFER_PAGE_LRU     | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_BUFFER_POOL_STATS   | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_TEMP_TABLE_INFO     | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_METRICS             | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_FT_DEFAULT_STOPWORD | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_FT_DELETED          | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_FT_BEING_DELETED    | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_FT_CONFIG           | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_FT_INDEX_CACHE      | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_FT_INDEX_TABLE      | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_TABLES          | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_TABLESTATS      | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_INDEXES         | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_COLUMNS         | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_FIELDS          | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_FOREIGN         | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_FOREIGN_COLS    | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_TABLESPACES     | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_DATAFILES       | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| INNODB_SYS_VIRTUAL         | ACTIVE   | INFORMATION SCHEMA | NULL                 | GPL     |
| MRG_MYISAM                 | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| MEMORY                     | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| CSV                        | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| BLACKHOLE                  | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| partition                  | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| FEDERATED                  | DISABLED | STORAGE ENGINE     | NULL                 | GPL     |
| ARCHIVE                    | ACTIVE   | STORAGE ENGINE     | NULL                 | GPL     |
| ngram                      | ACTIVE   | FTPARSER           | NULL                 | GPL     |
| group_replication          | ACTIVE   | GROUP REPLICATION  | group_replication.so | GPL     |
+----------------------------+----------+--------------------+----------------------+---------+
45 rows in set (0.00 sec)
 
mysql>

看到有group_replication ACTIVE，表示插group_replication插件安装成功。 

5，配置group replication参数

确保binlog_format是row格式。

mysql> show variables like 'binlog_format';                                             
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| binlog_format | ROW   |
+---------------+-------+
1 row in set (0.00 sec)
 
mysql>

两种配置方式，在线添加 OR 配置文件

（1） db1上的my.cnf配置：
# replication config
server_id=12001
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
 
# group replication config
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="e4668cea-d7ca-11e6-86b5-18a99b76310d"                        
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "db1:24901"
loose-group_replication_group_seeds=  "db1:24901,db2:24902,db3:24903"
loose-group_replication_bootstrap_group=  off
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks=  TRUE
 
（2）db2上的my.cnf配置：
# replication config
server_id=12002
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
 
# group replication config
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="e4668cea-d7ca-11e6-86b5-18a99b76310d"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "db2:24902"
loose-group_replication_group_seeds=  "db1:24901,db2:24902,db3:24903"
loose-group_replication_bootstrap_group=  off
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks=  TRUE
 
 
（3）db3上的my.cnf配置：
# replication config
server_id=12003
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
 
# group replication config
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="e4668cea-d7ca-11e6-86b5-18a99b76310d"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address= "db3:24903"
loose-group_replication_group_seeds=  "db1:24901,db2:24902,db3:24903"
loose-group_replication_bootstrap_group=  off
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks=  TRUE

配置完后，重启3个db上的mysql服务

Db1启动：

[root@hch_test_dbm2_121_71 ~]# service  mysqld start                                     
Starting MySQL..                                           [确定]
[root@hch_test_dbm2_121_71 ~]#

Db2启动： 

[root@bpe_service ~]# service mysqld  start
Starting MySQL..                                           [确定]                                                     
[root@bpe_service ~]#

Db3启动： 

[root@hch_test_web_1_24 ~]# service  mysqld start                                            
Starting MySQL..                                           [确定]
[root@hch_test_web_1_24 ~]#

6，启动mgr集群

构建之前，保证db1、db2、db3的read_only是关闭的

开始构建group replication集群，通常操作命令

mysql>   CHANGE MASTER TO MASTER_USER='repl',  MASTER_PASSWORD='rlpbright_1927@ys' FOR CHANNEL 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings  (0.02 sec)
 
mysql>

db1上建立基本主库master库：

# 设置group_replication_bootstrap_group为ON是为了标示以后加入集群的服务器以这台服务器为基准，以后加入的就不需要设置。

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 (1.03 sec)
 
mysql> SET GLOBAL group_replication_bootstrap_group=OFF;
Query OK, 0 rows affected (0.00 sec)
 
mysql>
mysql>  SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID    | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 3381d155-d7d1-11e6-94f7-b8ca3af6e36c | hch_test_dbm2_121_71 |        3317 | ONLINE      |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
1 row in set (0.00 sec)
 
mysql>

Db2上启动group_replication： 

Db2上mysql命令行上执行启动：

mysql>   START GROUP_REPLICATION;
Query OK, 0 rows affected (1.02 sec)
 
mysql>

db1后台error log日志显示，看到db2加入进来了，进了group：

2017-01-11T07:51:40.623093Z 0 [Note]  Plugin group_replication reported: 'Marking group replication view change  with view_id 14841207424144277:8'
2017-01-11T07:51:40.650962Z 21 [Note]  Start binlog_dump to master_thread_id(21) slave_server(12002), pos(, 4)
2017-01-11T07:51:40.687441Z 0 [Note]  Plugin group_replication reported: 'The member with address bpe_service:3317  was 
declared online within the replication group'
2017-01-11T07:52:40.651481Z 21 [Note]  Aborted connection 21 to db: 'unconnected' user: 'repl' host:  '192.168.121.111' (failed on flush_net())

再去master库db1上，查看group_replication成员，会有db2的显示，看到MEMBER_STATE都是ONLINE，表示都是MASTER：

mysql>  SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID       | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 3381d155-d7d1-11e6-94f7-b8ca3af6e36c | hch_test_dbm2_121_71 |        3317 | ONLINE       |
| group_replication_applier | 84dba8ff-d7d2-11e6-aa9a-18a99b76310d | bpe_service          |        3317 | ONLINE       |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
2 rows in set (0.00 sec)
 
mysql>

db3上启动group_replication： 

Db3命令行上执行：

mysql> set global  group_replication_allow_local_disjoint_gtids_join=ON;
Query OK, 0 rows affected (0.00 sec)
 
mysql> start group_replication;
Query OK, 0 rows affected (1.99 sec)
 
mysql>

再去master库db1上，查看group_replication成员，会有db3的显示，而且已经是ONLINE了

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 21750571-d7d3-11e6-91e2-18a99b763071 | hch_test_web_1_24    |        3317 | ONLINE       |
| group_replication_applier | 3381d155-d7d1-11e6-94f7-b8ca3af6e36c | hch_test_dbm2_121_71 |        3317 | ONLINE       |
| group_replication_applier | 84dba8ff-d7d2-11e6-aa9a-18a99b76310d | bpe_service          |        3317 | ONLINE       |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
3 rows in set (0.00 sec)
 
mysql>

db1上后台error log显示：

2017-01-11T08:13:05.972276Z 0 [Note]  Plugin group_replication reported: 'getstart group_id 8da193f6'
2017-01-11T08:13:08.146144Z 0 [Note]  Plugin group_replication reported: 'Marking group replication view change  with view_id 14841207424144277:11'
2017-01-11T08:13:08.174808Z 25 [Note]  Start binlog_dump to master_thread_id(25) slave_server(12003), pos(, 4)
2017-01-11T08:13:08.218338Z 0 [Note]  Plugin group_replication reported: 'The member with address  
hch_test_web_1_24:3317 was declared online within the replication group'
2017-01-11T08:14:08.175308Z 25 [Note]  Aborted connection 25 to db: 'unconnected' user: 'repl' host:  '192.168.121.24' (failed on flush_net())

最后查看集群状态：

mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID                            | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 3d872c2e-d670-11e6-ac1f-b8ca3af6e36c | hch_test_dbm2_121_71 |        3317 | ONLINE       |
| group_replication_applier | ef8ac2de-d671-11e6-9ba4-18a99b763071 | hch_test_web_1_24    |        3317 | ONLINE       |
| group_replication_applier | fdf2b02e-d66f-11e6-98a8-18a99b76310d | bpe_service          |        3317 | ONLINE       |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
3 rows in set (0.00 sec)
 
mysql>

7，验证集群复制功能

测试，在master库db1上建立测试库db1，测试表t1，录入一条数据

mysql> create database db1;
Query OK, 1 row affected (0.00 sec)
 
mysql> create table db1.t1(id int,cn  varchar(32));
Query OK, 0 rows affected (0.02 sec)
 
mysql>
mysql> insert into t1(id,cn)values(  1,'a');
ERROR 3098 (HY000): The table does not  comply with the requirements by an external plugin.
mysql>
mysql>
# 这里原因是group_replaction环境下面，表必须有主键不然不允许往里insert值。所以修改表t1，将id字段设置程主键即可。
mysql> alter table t1 modify id int  primary key;
Query OK, 0 rows affected (0.02 sec)
Records: 0  Duplicates: 0  Warnings: 0

 

 

然后在db2上执行insert操作，则成功

然后再db3上执行insert操作，则成功

在db1、db2、db3分部录入的数据，再分表去db1、db2、db3上查看t1表的数据，数据都已经复制同步过来了，已经实现了group里面多成员member多处写操作。

8 添加新的成员

简要步骤：

（1）      安装mysql实例

（2）      准备my.cnf

#replication
server_id=12001 # 这个是随着新服务器的添加会变化
gtid_mode=ON
enforce_gtid_consistency=ON
master_info_repository=TABLE
relay_log_info_repository=TABLE
binlog_checksum=NONE
log_slave_updates=ON
log_bin=binlog
binlog_format=ROW
 
#group replication
transaction_write_set_extraction=XXHASH64
loose-group_replication_group_name="e4668cea-d7ca-11e6-86b5-18a99b76310d"
loose-group_replication_start_on_boot=off
loose-group_replication_local_address=  "db1:24901" # 这个是随着新服务器的添加会变化
loose-group_replication_group_seeds=  "db1:24901,db2:24902,db3:24903"# 这个是随着新服务器的添加会变化
loose-group_replication_bootstrap_group=  off
loose-group_replication_single_primary_mode=FALSE
loose-group_replication_enforce_update_everywhere_checks=  TRUE

 

 

（3）      启动mysql实例，service mysqld start;

（4）      开启group replication

SET SQL_LOG_BIN=0;  # 在建立复制账号的时候，不需要进入binlog日志
GRANT REPLICATION SLAVE ON *.* TO 'repl'@'192.168.%' IDENTIFIED BY  'rlpbright_1927@ys';
SET SQL_LOG_BIN=1;
CHANGE MASTER TO MASTER_USER='repl',  MASTER_PASSWORD='rlpbright_1927@ys' FOR CHANNEL 'group_replication_recovery';
START group_replication;
SELECT * FROM performance_schema.replication_group_members;

（5）验证组成员，SELECT * FROM performance_schema.replication_group_members;

9，管理操作命令 

查看group状态信息：SELECT * FROM performance_schema.replication_group_members;

 

查询replication协议的其它数据：select * from performance_schema.replication_group_member_stats\G

 

 

查看后台进程2个：

[root@hch_test_dbm2_121_71 soft]# netstat  -ntpl|grep mysql
tcp         0      0 0.0.0.0:24901    0.0.0.0:*  LISTEN      3665/mysqld        
tcp         0      0 :::3317       :::*  LISTEN      3665/mysqld        
[root@hch_test_dbm2_121_71 soft]#

组复制成员状态表：select * from performance_schema.replication_group_member_stats;查看的是当前的状态：

performance_schema.replication_applier_status

10，问题记录

10.1问题记录一

Db2的mysql窗口报错：
mysql> START GROUP_REPLICATION;
ERROR 3092 (HY000): The server is not  configured properly to be an active member of the group. Please see more  details on error log.
mysql>
 
db2的error log信息如下：
2017-01-11T07:57:41.161360Z 0 [ERROR]  Plugin group_replication reported: 'This member has more executed  
transactions than those present in the group. Local transactions:  84dba8ff-d7d2-11e6-aa9a-18a99b76310d:1 > 
Group transactions:  3381d155-d7d1-11e6-94f7-b8ca3af6e36c:1,
e4668cea-d7ca-11e6-86b5-18a99b76310d:1-3'
2017-01-11T07:57:41.161430Z 0 [ERROR]  Plugin group_replication reported: 'The member contains transactions not  
present in the group. The member will now exit the group.'
2017-01-11T07:57:41.161445Z 0 [Note]  Plugin group_replication reported: 'To force this member into the group you  
can use the group_replication_allow_local_disjoint_gtids_join option'
2017-01-11T07:57:41.161589Z 3 [Note]  Plugin group_replication reported: 'Going to wait for view modification'
2017-01-11T07:57:41.162126Z 0 [Note]  Plugin group_replication reported: 'getstart group_id 8da193f6'
2017-01-11T07:57:44.508236Z 0 [Note]  Plugin group_replication reported: 'state 4330 action xa_terminate'
2017-01-11T07:57:44.508429Z 0 [Note]  Plugin group_replication reported: 'new state x_start'
2017-01-11T07:57:44.508561Z 0 [Note]  Plugin group_replication reported: 'state 4257 action xa_exit'
2017-01-11T07:57:44.508720Z 0 [Note]  Plugin group_replication reported: 'Exiting xcom thread'
2017-01-11T07:57:44.508746Z 0 [Note]  Plugin group_replication reported: 'new state x_start'
2017-01-11T07:57:49.549137Z 3 [Note]  Plugin group_replication reported: 'auto_increment_increment is reset to 1'
2017-01-11T07:57:49.549192Z 3 [Note]  Plugin group_replication reported: 'auto_increment_offset is reset to 1'
2017-01-11T07:57:49.549472Z 23 [Note]  Error reading relay log event for channel 'group_replication_applier': 
slave  SQL thread was killed
2017-01-11T07:57:49.550037Z 20 [Note] Plugin  group_replication reported: 'The group replication applier thread was killed'
 
【解决办法】设置group_replication_allow_local_disjoint_gtids_join为ON
mysql> set global  group_replication_allow_local_disjoint_gtids_join=ON;
Query OK, 0 rows affected (0.00 sec)
 
mysql> START GROUP_REPLICATION;
Query OK, 0 rows affected (5.52 sec)
 
mysql>

 

10.2问题记录二

Sql界面显示状态为ERROR：

 

Errorlog显示：

2017-01-11T08:07:34.587378Z 12 [Note]  'CHANGE MASTER TO FOR CHANNEL 'group_replication_recovery' executed'.  
Previous state master_host='bpe_service', master_port= 3317,  master_log_file='', master_log_pos= 4, master_bind=''. New state  
master_host=&#39;<NULL>&#39;, master_port= 0, master_log_file=&#39;&#39;,  master_log_pos= 4, master_bind=&#39;&#39;.
2017-01-11T08:07:34.591679Z 12 [ERROR]  Plugin group_replication reported: &#39;Fatal error during the Recovery process  of Group Replication. 
The server will leave the group.&#39;
2017-01-11T08:07:34.592447Z 0 [Note]  Plugin group_replication reported: &#39;getstart group_id 8da193f6&#39;
2017-01-11T08:07:37.943536Z 0 [Note]  Plugin group_replication reported: &#39;state 4330 action xa_terminate&#39;
2017-01-11T08:07:37.943852Z 0 [Note]  Plugin group_replication reported: &#39;new state x_start&#39;
2017-01-11T08:07:37.943879Z 0 [Note]  Plugin group_replication reported: &#39;state 4257 action xa_exit&#39;
2017-01-11T08:07:37.943981Z 0 [Note]  Plugin group_replication reported: &#39;Exiting xcom thread&#39;
2017-01-11T08:07:37.943999Z 0 [Note]  Plugin group_replication reported: &#39;new state x_start&#39;

 

【解决办法】：

mysql> CHANGE MASTER TO MASTER_USER='repl', MASTER_PASSWORD='rlpbright_1927@ys' FOR CHANNEL 'group_replication_recovery';
Query OK, 0 rows affected, 2 warnings (0.01 sec)
 
mysql> stop group_replication;
Query OK, 0 rows affected (0.01 sec)
 
mysql> start group_replication;
Query OK, 0 rows affected (2.20 sec)
 
mysql>
mysql> SELECT * FROM performance_schema.replication_group_members;
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| CHANNEL_NAME              | MEMBER_ID      | MEMBER_HOST          | MEMBER_PORT | MEMBER_STATE |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
| group_replication_applier | 21750571-d7d3-11e6-91e2-18a99b763071 | hch_test_web_1_24    |    3317 | ONLINE       |
| group_replication_applier | 3381d155-d7d1-11e6-94f7-b8ca3af6e36c | hch_test_dbm2_121_71 |        3317 | ONLINE       |
| group_replication_applier | 84dba8ff-d7d2-11e6-aa9a-18a99b76310d | bpe_service     |     3317 | ONLINE       |
+---------------------------+--------------------------------------+----------------------+-------------+--------------+
3 rows in set (0.00 sec)
 
mysql>

 

 

 

 

 

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