InnoDB Clusterを構築すると、MySQL Routerの設定ファイルが自動的に作成されます。基本的にはTTLによって構成はキャッシュされますが、metadata cache componentが常にMySQLに接続していて、Group Replicationの状況をモニタリングしています。それにより、構成変更や障害発生時には自動的に検知してアプリケーションを適切なデータベースに振り分けてくれます。

【以下、マニュアル抜粋】
MySQL Router keeps a cached list of the online MySQL servers, or the topology and state of the configured InnoDB cluster. Initially, the list is loaded from Router’s configuration file when Router is started. This list was generated with InnoDB cluster servers when Router was bootstrapped using the –bootstrap option.

To keep the cache updated, the metadata cache component keeps an open connection to one of the InnoDB cluster servers that contains metadata. It does so by querying the metadata database and live state information from MySQL’s performance schema. The cluster metadata is changed whenever the InnoDB cluster is modified, such as adding or removing a MySQL server using the MySQL Shell, and the performance_schema tables are updated in real-time by the MySQL server’s Group Replication plugin whenever a cluster state change is detected. For example, if one of the MySQL servers unexpectedly exits.

When Router detects that a connected MySQL server crashes, for example because the metadata cache has lost its connection and can not connect again, it attempts to connect to a different MySQL server to fetch metadata and InnoDB cluster state from the new MySQL server.

Application connections to a MySQL server that crashes are automatically closed. They must then reconnect to Router, which redirects them to an online MySQL server.

参照: https://dev.mysql.com/doc/mysql-router/2.1/en/mysql-router-general-metadata.html

MySQL Router2.1から, MySQLへの常時接続の確認 (mysql_router5_212qj4063dmw)


mysql> show processlist;
+----+----------------------------+-----------------+-------+---------+------+--------------------------------------------------------+------------------+
| Id | User                       | Host            | db    | Command | Time | State                                                  | Info             |
+----+----------------------------+-----------------+-------+---------+------+--------------------------------------------------------+------------------+
| 11 | system user                |                 | NULL  | Connect | 4600 | executing                                              | NULL             |
| 14 | system user                |                 | NULL  | Connect | 4600 | Slave has read all relay log; waiting for more updates | NULL             |
| 42 | root                       | localhost       | mysql | Query   |    0 | System lock                                            | show processlist |
| 43 | mysql_router5_212qj4063dmw | localhost:48721 | NULL  | Sleep   |   66 |                                                        | NULL             |
+----+----------------------------+-----------------+-------+---------+------+--------------------------------------------------------+------------------+
4 rows in set (0.01 sec)

mysql> select * from general_log;
+----------------------------+------------------------------+-----------+-----------+--------------+----------------------------------------+
| event_time                 | user_host                    | thread_id | server_id | command_type | argument                               |
+----------------------------+------------------------------+-----------+-----------+--------------+----------------------------------------+
| 2017-06-09 14:34:32.995672 | root[root] @ localhost []    |        42 | 944686911 | Query        | select * from general_log              |
| 2017-06-09 14:34:37.233924 | root[root] @ localhost []    |        42 | 944686911 | Query        | show processlist                       |
| 2017-06-09 14:34:41.252563 | [root] @ localhost [::1]     |        46 | 944686911 | Connect      | root@localhost on  using SSL/TLS       |
| 2017-06-09 14:34:41.253181 | root[root] @ localhost [::1] |        46 | 944686911 | Query        | select @@version_comment limit 1       |
| 2017-06-09 14:34:41.253872 | root[root] @ localhost [::1] |        46 | 944686911 | Query        | select 'R-Port:6446',@@hostname,@@port |
| 2017-06-09 14:34:41.257997 | root[root] @ localhost [::1] |        46 | 944686911 | Quit         |                                        |
| 2017-06-09 14:34:44.344733 | root[root] @ localhost []    |        42 | 944686911 | Query        | select * from general_log              |
+----------------------------+------------------------------+-----------+-----------+--------------+----------------------------------------+
7 rows in set (0.00 sec)


PRIMARY(書き込み)は固定され、SECONDARYは参照専用でラウンドロビンされている

-bash-4.2$ ./mysql_status_router.sh 
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3320 |
+-------------+--------------+--------+
-bash-4.2$ ./mysql_status_router.sh 
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3330 |
+-------------+--------------+--------+
-bash-4.2$ 


SECONDARYの一台を停止してみる


mysql-js> shell.connect('root@localhost:3310');
Please provide the password for 'root@localhost:3310': 
Creating a Session to 'root@localhost:3310'
Classic Session successfully established. No default schema selected.
mysql-js> dba.killSandboxInstance(3320)
The MySQL sandbox instance on this host in 
/home/mysql/mysql-sandboxes/3320 will be killed


Killing MySQL instance...

Instance localhost:3320 successfully killed.

mysql-js> var cluster = dba.getCluster("testCluster")
mysql-js> cluster.status()
{
    "clusterName": "testCluster", 
    "defaultReplicaSet": {
        "name": "default", 
        "primary": "localhost:3310", 
        "status": "OK_NO_TOLERANCE", 
        "statusText": "Cluster is NOT tolerant to any failures. 1 member is not active", 
        "topology": {
            "localhost:3310": {
                "address": "localhost:3310", 
                "mode": "R/W", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }, 
            "localhost:3320": {
                "address": "localhost:3320", 
                "mode": "R/O", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "(MISSING)"
            }, 
            "localhost:3330": {
                "address": "localhost:3330", 
                "mode": "R/O", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }
        }
    }
}
mysql-js> 


MySQL Router2.1がトポロジーの変更を認識し、以下のコマンドをmysql_router5_212qj4063dmw@localhostから実行している事が確認出来る

mysql> select * from general_log;
+----------------------------+--------------------------------------------------------------------------------+-----------+-----------+--------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| event_time                 | user_host                                                                      | thread_id | server_id | command_type | argument                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
+----------------------------+--------------------------------------------------------------------------------+-----------+-----------+--------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
| 2017-06-09 14:34:57.700152 | root[root] @ localhost []                                                      |        42 | 944686911 | Query        | select * from general_log                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
| 2017-06-09 14:35:39.294567 | _gr_user[_gr_user] @ localhost []                                              |        48 | 944686911 | Connect      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:35:39.294983 | _gr_user[_gr_user] @ localhost []                                              |        48 | 944686911 | Query        | SELECT @@GLOBAL.gtid_executed                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |
| 2017-06-09 14:35:39.295129 | _gr_user[_gr_user] @ localhost []                                              |        48 | 944686911 | Quit         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:35:39.299868 | _gr_user[_gr_user] @ localhost []                                              |        49 | 944686911 | Connect      |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:35:39.300055 | _gr_user[_gr_user] @ localhost []                                              |        49 | 944686911 | Quit         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:35:41.755412 | root[root] @ localhost []                                                      |        42 | 944686911 | Query        | show processlist                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 2017-06-09 14:35:54.021036 | [root] @ localhost [::1]                                                       |        50 | 944686911 | Connect      | root@localhost on  using SSL/TLS                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 2017-06-09 14:35:54.021898 | root[root] @ localhost [::1]                                                   |        50 | 944686911 | Query        | select @@version_comment limit 1                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 2017-06-09 14:35:54.022239 | root[root] @ localhost [::1]                                                   |        50 | 944686911 | Query        | select 'R-Port:6446',@@hostname,@@port                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| 2017-06-09 14:35:54.025850 | root[root] @ localhost [::1]                                                   |        50 | 944686911 | Quit         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:35:54.939557 | mysql_router5_212qj4063dmw[mysql_router5_212qj4063dmw] @ localhost [127.0.0.1] |        43 | 944686911 | Quit         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:35:55.225193 | [mysql_router5_212qj4063dmw] @ localhost [127.0.0.1]                           |        51 | 944686911 | Connect      | mysql_router5_212qj4063dmw@localhost on  using SSL/TLS                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| 2017-06-09 14:35:55.227370 | mysql_router5_212qj4063dmw[mysql_router5_212qj4063dmw] @ localhost [127.0.0.1] |        51 | 944686911 | Query        | SELECT R.replicaset_name, I.mysql_server_uuid, I.role, I.weight, I.version_token, H.location, I.addresses->>'$.mysqlClassic', I.addresses->>'$.mysqlX' FROM mysql_innodb_cluster_metadata.clusters AS F JOIN mysql_innodb_cluster_metadata.replicasets AS R ON F.cluster_id = R.cluster_id JOIN mysql_innodb_cluster_metadata.instances AS I ON R.replicaset_id = I.replicaset_id JOIN mysql_innodb_cluster_metadata.hosts AS H ON I.host_id = H.host_id WHERE F.cluster_name = 'testCluster' |
| 2017-06-09 14:35:55.229489 | mysql_router5_212qj4063dmw[mysql_router5_212qj4063dmw] @ localhost [127.0.0.1] |        51 | 944686911 | Query        | show status like 'group_replication_primary_member'                                                                                                                                                                                                                                                                                                                                                                                                                                           |
| 2017-06-09 14:35:55.232809 | mysql_router5_212qj4063dmw[mysql_router5_212qj4063dmw] @ localhost [127.0.0.1] |        51 | 944686911 | Query        | SELECT member_id, member_host, member_port, member_state, @@group_replication_single_primary_mode FROM performance_schema.replication_group_members WHERE channel_name = 'group_replication_applier'                                                                                                                                                                                                                                                                                          |
| 2017-06-09 14:35:55.764665 | [root] @ localhost [::1]                                                       |        52 | 944686911 | Connect      | root@localhost on  using SSL/TLS                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 2017-06-09 14:35:55.765502 | root[root] @ localhost [::1]                                                   |        52 | 944686911 | Query        | select @@version_comment limit 1                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 2017-06-09 14:35:55.767062 | root[root] @ localhost [::1]                                                   |        52 | 944686911 | Query        | select 'R-Port:6446',@@hostname,@@port                                                                                                                                                                                                                                                                                                                                                                                                                                                        |
| 2017-06-09 14:35:55.770798 | root[root] @ localhost [::1]                                                   |        52 | 944686911 | Quit         |                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               |
| 2017-06-09 14:36:00.277880 | root[root] @ localhost []                                                      |        42 | 944686911 | Query        | show processlist                                                                                                                                                                                                                                                                                                                                                                                                                                                                              |
| 2017-06-09 14:36:04.168023 | root[root] @ localhost []                                                      |        42 | 944686911 | Query        | select * from general_log                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |
+----------------------------+--------------------------------------------------------------------------------+-----------+-----------+--------------+-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
33 rows in set (0.00 sec)

MySQL Router 2.1が実行しているコマンド
このコマンドで、PRIMARYと現状のGroup Replicationの構成を認識している。

mysql> show status like 'group_replication_primary_member';      
+----------------------------------+--------------------------------------+
| Variable_name                    | Value                                |
+----------------------------------+--------------------------------------+
| group_replication_primary_member | 1c008db5-4cca-11e7-be2d-080027d65c57 |
+----------------------------------+--------------------------------------+
1 row in set (0.00 sec)

mysql> SELECT R.replicaset_name, I.mysql_server_uuid, I.role, I.weight, I.version_token, H.location, I.addresses->>'$.mysqlClassic', I.addresses->>'$.mysqlX' FROM mysql_innodb_cluster_metadata.clusters AS F JOIN mysql_innodb_cluster_metadata.replicasets AS R ON F.cluster_id = R.cluster_id JOIN mysql_innodb_cluster_metadata.instances AS I ON R.replicaset_id = I.replicaset_id JOIN mysql_innodb_cluster_metadata.hosts AS H ON I.host_id = H.host_id WHERE F.cluster_name = 'testCluster';
+-----------------+--------------------------------------+------+--------+---------------+----------+--------------------------------+--------------------------+
| replicaset_name | mysql_server_uuid                    | role | weight | version_token | location | I.addresses->>'$.mysqlClassic' | I.addresses->>'$.mysqlX' |
+-----------------+--------------------------------------+------+--------+---------------+----------+--------------------------------+--------------------------+
| default         | 1c008db5-4cca-11e7-be2d-080027d65c57 | HA   |   NULL |          NULL |          | localhost:3310                 | localhost:33100          |
| default         | 4acfab6c-4cca-11e7-848b-080027d65c57 | HA   |   NULL |          NULL |          | localhost:3320                 | localhost:33200          |
| default         | 7b6cb3c3-4cca-11e7-8af6-080027d65c57 | HA   |   NULL |          NULL |          | localhost:3330                 | localhost:33300          |
+-----------------+--------------------------------------+------+--------+---------------+----------+--------------------------------+--------------------------+
3 rows in set (0.01 sec)

mysql> SELECT member_id, member_host, member_port, member_state, @@group_replication_single_primary_mode FROM performance_schema.replication_group_members WHERE channel_name = 'group_replication_applier';
+--------------------------------------+--------------+-------------+--------------+-----------------------------------------+
| member_id                            | member_host  | member_port | member_state | @@group_replication_single_primary_mode |
+--------------------------------------+--------------+-------------+--------------+-----------------------------------------+
| 1c008db5-4cca-11e7-be2d-080027d65c57 | replications |        3310 | ONLINE       |                                       1 |
| 7b6cb3c3-4cca-11e7-8af6-080027d65c57 | replications |        3330 | ONLINE       |                                       1 |
+--------------------------------------+--------------+-------------+--------------+-----------------------------------------+
2 rows in set (0.00 sec)

mysql> 

ノード3320は停止しているので、MySQL Router2.1が稼働しているノードに適切に割り振っている

mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3330 |
+-------------+--------------+--------+
-bash-4.2$ ./mysql_status_router.sh 
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3330 |
+-------------+--------------+--------+
-bash-4.2$ 

停止していたインスタンスを再稼働させる


-bash-4.2$ mysqlsh
Welcome to MySQL Shell 1.0.9

Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type '\help', '\h' or '\?' for help, type '\quit' or '\q' to exit.

Currently in JavaScript mode. Use \sql to switch to SQL mode and execute queries.
mysql-js> shell.connect('root@localhost:3310');
Please provide the password for 'root@localhost:3310': 
Creating a Session to 'root@localhost:3310'
Classic Session successfully established. No default schema selected.
mysql-js> dba.startSandboxInstance(3320);
The MySQL sandbox instance on this host in 
/home/mysql/mysql-sandboxes/3320 will be started


Starting MySQL instance...

Instance localhost:3320 successfully started.

mysql-js> var cluster = dba.getCluster("testCluster")
mysql-js> cluster.rejoinInstance('localhost:3320')
Rejoining the instance to the InnoDB cluster. Depending on the original
problem that made the instance unavailable, the rejoin operation might not be
successful and further manual steps will be needed to fix the underlying
problem.

Please monitor the output of the rejoin operation and take necessary action if
the instance cannot rejoin.

Please provide the password for 'root@localhost:3320': 
Rejoining instance to the cluster ...

The instance 'root@localhost:3320' was successfully rejoined on the cluster.

The instance 'localhost:3320' was successfully added to the MySQL Cluster.
mysql-js> cluster.status()
{
    "clusterName": "testCluster", 
    "defaultReplicaSet": {
        "name": "default", 
        "primary": "localhost:3310", 
        "status": "OK", 
        "statusText": "Cluster is ONLINE and can tolerate up to ONE failure.", 
        "topology": {
            "localhost:3310": {
                "address": "localhost:3310", 
                "mode": "R/W", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }, 
            "localhost:3320": {
                "address": "localhost:3320", 
                "mode": "R/O", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }, 
            "localhost:3330": {
                "address": "localhost:3330", 
                "mode": "R/O", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }
        }
    }
}
mysql-js> 

MySQL Routerも認識して再度バランシングに追加されている事が確認出来る


mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3330 |
+-------------+--------------+--------+
-bash-4.2$ ./mysql_status_router.sh 
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3320 |
+-------------+--------------+--------+
-bash-4.2$ 

詳細は、此方を確認下さい
https://dev.mysql.com/doc/mysql-router/2.1/en/

サポート (HA & RouterはEEにてサポート)
https://www.mysql.com/jp/support/


MySQLで高可用性構成を実現する為の、新しいフレームワーク “InnoDB Cluster”がGAになりました。
http://mysqlserverteam.com/mysql-innodb-cluster-ga/

複数サーバーを用意して検証する事も出来ますが、手取り早く手元のlocalhost環境で検証したい場合はSandboxモードを利用すると良いでしょう。

詳細: Deploying Sandbox Instances
https://dev.mysql.com/doc/refman/5.7/en/mysql-innodb-cluster-getting-started.html#idc-deploy-sandbox-instances

■ MySQLインスタンスの作成 (3台~9台:奇数構成を推奨しています)
mysqlshコマンドでSandbox用のインスタンスを作成しています。
※ mysqlユーザーで実行すると、ホームディレクトリに以下のようにPort毎にフォルダーが出来ます。
  データファイル、オプションファイル共に以下のフォルダーに配置されます。
  /home/mysql/mysql-sandboxes/ポート番号


-bash-4.2$ /usr/local/mysqlshell/bin/mysqlsh
Welcome to MySQL Shell 1.0.9

Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type '\help', '\h' or '\?' for help, type '\quit' or '\q' to exit.

Currently in JavaScript mode. Use \sql to switch to SQL mode and execute queries.
mysql-js> dba.deploySandboxInstance(3310)
A new MySQL sandbox instance will be created on this host in 
/home/mysql/mysql-sandboxes/3310

Please enter a MySQL root password for the new instance: 
Deploying new MySQL instance...

Instance localhost:3310 successfully deployed and started.
Use shell.connect('root@localhost:3310'); to connect to the instance.

mysql-js> dba.deploySandboxInstance(3320)
A new MySQL sandbox instance will be created on this host in 
/home/mysql/mysql-sandboxes/3320

Please enter a MySQL root password for the new instance: 
Deploying new MySQL instance...


Instance localhost:3320 successfully deployed and started.
Use shell.connect('root@localhost:3320'); to connect to the instance.

mysql-js> dba.deploySandboxInstance(3330)
A new MySQL sandbox instance will be created on this host in 
/home/mysql/mysql-sandboxes/3330

Please enter a MySQL root password for the new instance: 
Deploying new MySQL instance...

Instance localhost:3330 successfully deployed and started.
Use shell.connect('root@localhost:3330'); to connect to the instance.

mysql-js> 

■ 上記で3台のインスタンスが作成されたので、mysqlshを使って接続して、グループレプリケーションの設定とノードを参加させます。


mysql-js> \connect root@localhost:3310
Creating a Session to 'root@localhost:3310'
Enter password: 
Classic Session successfully established. No default schema selected.
mysql-js> var cluster = dba.createCluster('testCluster')
A new InnoDB cluster will be created on instance 'root@localhost:3310'.

Creating InnoDB cluster 'testCluster' on 'root@localhost:3310'...
Adding Seed Instance...

Cluster successfully created. Use Cluster.addInstance() to add MySQL instances.
At least 3 instances are needed for the cluster to be able to withstand up to
one server failure.

mysql-js> cluster.addInstance('root@localhost:3320')
A new instance will be added to the InnoDB cluster. Depending on the amount of
data on the cluster this might take from a few seconds to several hours.

Please provide the password for 'root@localhost:3320': 
Adding instance to the cluster ...

The instance 'root@localhost:3320' was successfully added to the cluster.

mysql-js> cluster.addInstance('root@localhost:3330')
A new instance will be added to the InnoDB cluster. Depending on the amount of
data on the cluster this might take from a few seconds to several hours.

Please provide the password for 'root@localhost:3330': 
Adding instance to the cluster ...

The instance 'root@localhost:3330' was successfully added to the cluster.


■ 上記コマンドでグループレプリケーション(シングルマスターモード)が作成されたので、ステータスを確認して見ます。

-bash-4.2$ /usr/local/mysqlshell/bin/mysqlsh
Welcome to MySQL Shell 1.0.9

Copyright (c) 2016, 2017, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type '\help', '\h' or '\?' for help, type '\quit' or '\q' to exit.

Currently in JavaScript mode. Use \sql to switch to SQL mode and execute queries.
mysql-js> \connect root@localhost:3310
Creating a Session to 'root@localhost:3310'
Enter password: 
Classic Session successfully established. No default schema selected.
mysql-js> cluster = dba.getCluster()
<Cluster:testCluster>
mysql-js> cluster.status()
{
    "clusterName": "testCluster", 
    "defaultReplicaSet": {
        "name": "default", 
        "primary": "localhost:3310", 
        "status": "OK", 
        "statusText": "Cluster is ONLINE and can tolerate up to ONE failure.", 
        "topology": {
            "localhost:3310": {
                "address": "localhost:3310", 
                "mode": "R/W", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }, 
            "localhost:3320": {
                "address": "localhost:3320", 
                "mode": "R/O", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }, 
            "localhost:3330": {
                "address": "localhost:3330", 
                "mode": "R/O", 
                "readReplicas": {}, 
                "role": "HA", 
                "status": "ONLINE"
            }
        }
    }
}
mysql-js> cluster.describe()
{
    "clusterName": "testCluster", 
    "defaultReplicaSet": {
        "instances": [
            {
                "host": "localhost:3310", 
                "label": "localhost:3310", 
                "role": "HA"
            },
            {
                "host": "localhost:3320", 
                "label": "localhost:3320", 
                "role": "HA"
            },
            {
                "host": "localhost:3330", 
                "label": "localhost:3330", 
                "role": "HA"
            }
        ], 
        "name": "default"
    }
}
mysql-js> 

■ グループレプリケーションに接続する為に、bootstrapオプションを利用してmysqlrouterを立ち上げます。
これにより、mysqlにGroup ReplicationのステータスとRouterからの接続をハンドリングする為のメタデータが作成されます。


-bash-4.2$ /home/mysql/mysqlrouter/bin/mysqlrouter --bootstrap root@localhost:3310 
Please enter MySQL password for root: 

Bootstrapping system MySQL Router instance...
MySQL Router  has now been configured for the InnoDB cluster 'testCluster'.

The following connection information can be used to connect to the cluster.

Classic MySQL protocol connections to cluster 'testCluster':
- Read/Write Connections: localhost:6446
- Read/Only Connections: localhost:6447

X protocol connections to cluster 'testCluster':
- Read/Write Connections: localhost:64460
- Read/Only Connections: localhost:64470
-bash-4.2$ 

上記オプションで作成されたmysqlrouterのコンフィグレーションファイルは以下の様になっています。


-bash-4.2$ cat /home/mysql/mysql-router-commercial-2.1.3-linux-glibc2.12-x86-64bit/mysqlrouter.conf
# File automatically generated during MySQL Router bootstrap
[DEFAULT]
name=system
keyring_path=/home/mysql/mysql-router-commercial-2.1.3-linux-glibc2.12-x86-64bit/data/keyring
master_key_path=/home/mysql/mysql-router-commercial-2.1.3-linux-glibc2.12-x86-64bit/mysqlrouter.key

[logger]
level = INFO

[metadata_cache:testCluster]
router_id=5
bootstrap_server_addresses=mysql://localhost:3310,mysql://localhost:3320,mysql://localhost:3330
user=mysql_router5_o72w62ds45zk
metadata_cluster=testCluster
ttl=300

[routing:testCluster_default_rw]
bind_address=0.0.0.0
bind_port=6446
destinations=metadata-cache://testCluster/default?role=PRIMARY
mode=read-write
protocol=classic

[routing:testCluster_default_ro]
bind_address=0.0.0.0
bind_port=6447
destinations=metadata-cache://testCluster/default?role=SECONDARY
mode=read-only
protocol=classic

[routing:testCluster_default_x_rw]
bind_address=0.0.0.0
bind_port=64460
destinations=metadata-cache://testCluster/default?role=PRIMARY
mode=read-write
protocol=x

[routing:testCluster_default_x_ro]
bind_address=0.0.0.0
bind_port=64470
destinations=metadata-cache://testCluster/default?role=SECONDARY
mode=read-only
protocol=x

-bash-4.2$ 

mysql_innodb_cluster_metadata
mysql_innodb_cluster_metadataというInnoDB Clusterのリポジトリーが作成されていて、
MySQL Routerはこのメタデータを参照してサーバーを自動的に切り替えます。


mysql> show databases;
+-------------------------------+
| Database                      |
+-------------------------------+
| information_schema            |
| mysql                         |
| mysql_innodb_cluster_metadata |
| performance_schema            |
| sys                           |
+-------------------------------+
5 rows in set (0.00 sec)

mysql> 

■ MySQL Routerを起動します。

-bash-4.2$ /home/mysql/mysqlrouter/bin/mysqlrouter &
[1] 2623
-bash-4.2$ 


■ 接続を確認してみます。シングルマスターモードなので、PRIMARYは常に同じインスタンスに接続しに行きます。

SECONDARYはラウンドロビンで接続先を割り振られます。


-bash-4.2$ cat 5_mysql_status.sh 
#!/bin/sh

/usr/local/mysql/bin/mysql -u root -proot -h 127.0.0.1 -P 6446 -e "select 'R-Port:6446',@@hostname,@@port;"
/usr/local/mysql/bin/mysql -u root -proot -h 127.0.0.1 -P 6447 -e "select 'R-Port:6447',@@hostname,@@port;"
-bash-4.2$ 

-bash-4.2$ ./5_mysql_status.sh 
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3330 |
+-------------+--------------+--------+
-bash-4.2$ ./5_mysql_status.sh 
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6446 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6446 | replications |   3310 |
+-------------+--------------+--------+
mysql: [Warning] Using a password on the command line interface can be insecure.
+-------------+--------------+--------+
| R-Port:6447 | @@hostname   | @@port |
+-------------+--------------+--------+
| R-Port:6447 | replications |   3320 |
+-------------+--------------+--------+

-bash-4.2$ 

MySQL Shell経由でPythonで書いた処理をそのまま流し込めるので、
Twitter APIからJSONデータを取得して100件程データベースに流し込むデモを行いました。
PS: ネットワークがなぜか、共有WIFI、プライベートWIFI共に調子が悪く微妙な感じになってしまいましたが。。。

JSONデータ型、Generated Column(生成列)、MySQL Shellの挙動を簡易的にデモするものなので内容的には微妙ですが、
もしAPI経由でJSONデータを取得して、バッチ処理で定期的にサービスで使えそうなデータを取得して、
データを蓄積したり検索したい場合などに使えるかもしれません。

demo

————————————————————————
1) Create a Sample Table for Importing Data from Twitter API
————————————————————————
name列は、Tweetした人の名前が入ります。
text列は、Tweetしたコメントが入ります。


Create Table: CREATE TABLE `X_PYTHON` (
  `doc` json DEFAULT NULL,
  `_id` varchar(32) GENERATED ALWAYS AS (json_unquote(json_extract(`doc`,'$._id'))) STORED NOT NULL,
  `name` varchar(64) GENERATED ALWAYS AS (json_unquote(json_extract(`doc`,'$.user.name'))) STORED,
  `text` varchar(512) GENERATED ALWAYS AS (json_unquote(json_extract(`doc`,'$.text'))) STORED,
  UNIQUE KEY `_id` (`_id`),
  KEY `idx_name` (`name`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4

————————————————————————
2) Create python file ( demo_python_twitter.py )
————————————————————————
デモ用サンプルなので色々とコメントアウトしてます。またエラー処理も入れてません。
動作確認のみでご利用下さい。
※ Twitterキー、スキーマ、アカウントに関しては、適宜変更して下さい。
※ 必要に応じて、”pip install requests-oauthlib”でOauthもインストールしておいてください。


# coding: utf-8

print "======================================================"
print "MySQL5.7.12 Basic CRUD Operations by Python"
print "MySQL Innovation Daysデモ"
print "======================================================"

from requests_oauthlib import OAuth1Session
import json
import mysqlx

##############################################################
#    This section is just used for my private account.
##############################################################

api_key      = "Please put your own key"
api_secret   = "Please put your own key"
token        = "Please put your own key"
token_secret = "Please put your own key"

##############################################################
#    This section is API and Auth.
##############################################################

url = "https://api.twitter.com/1.1/statuses/home_timeline.json"
params = {'count':'100',}

auth = OAuth1Session(api_key, api_secret, token, token_secret)
res = auth.get(url, params = params)

##############################################################
#     Connect Session to the MySQL Instance.
##############################################################

if res.status_code == 200: # In case of successfully connect to API

 mySession = mysqlx.getSession({
 'host': 'localhost', 'port': 33060,
 'dbUser': 'demo_user', 'dbPassword': 'password'} )
 myDb = mySession.getSchema('NEW57')


### Create a new collection 'my_collection' ###
### This section is turned off for demo.    ###
# myColl = myDb.createCollection('X_PYTHON')


### Insert documents ###

 timeline = json.loads(res.text)
 for tweet in timeline:
   myDb.X_PYTHON.add(tweet).execute()
#  myDb.X_PYTHON.add(tweet).executeAsync() # ASYNCはmysqlshでは対象外.
#  print(tweet["text"])


####################################################
###         Drop the collection(Table)
####################################################
# mySession.dropCollection('NEW57','X_PYTHON')

else: # 失敗した場合
        print ("Error: %d" % req.status_code)

————————————————————————
3) Please Execute the Script through mysqlsh
————————————————————————
こちらは、Pythonモードで処理しています。


mysqlsh --py < demo_python_twitter.py

————————————————————————
4) You can find who is the most active user in twitter.
————————————————————————
mysqlshではパイプでつないで、リダイレクトする事が出来ます。


echo "select name,count(name) from X_PYTHON group by name order by count(name) desc limit 10;" | mysqlsh -u demo_user -ppassword --sql --schema=NEW57

実行結果(直近100件のTweet件数毎のデータ確認)


mysqlx: [Warning] Using a password on the command line interface can be insecure.
+---------------------------------------+-------------+
| name                                  | count(name) |
+---------------------------------------+-------------+
<snip>
| Tony Darnell                          |          13 |
| Giuseppe Maxia                        |           2 |
| planetmysql                           |           2 |
<snip>

name以外にtextにも生成列を設定しているので、コメントをフィルターする事も出来ます。
簡易デモなので何ですが、実用的な用途があれば簡単にJSONデータ処理出来るので色々なケースで使えるかもしれません。


root@localhost [NEW57]> desc X_PYTHON;
+-------+--------------+------+-----+---------+------------------+
| Field | Type         | Null | Key | Default | Extra            |
+-------+--------------+------+-----+---------+------------------+
| doc   | json         | YES  |     | NULL    |                  |
| _id   | varchar(32)  | NO   | PRI | NULL    | STORED GENERATED |
| name  | varchar(64)  | YES  | MUL | NULL    | STORED GENERATED |
| text  | varchar(512) | YES  |     | NULL    | STORED GENERATED |
+-------+--------------+------+-----+---------+------------------+
4 rows in set (0.00 sec)

root@localhost [NEW57]> 

【補足資料】
先日、MyNA(MySQL User Group)のイベントでMySQL AS Document Storeのデモした時の資料です。


先日、リリースされたMySQL5.7.12に含まれるmysqlxプラグインと、
同時にリリースされた、MySQL Shellの初期設定と基本動作確認を確認してみました。
基本的にこれらは、MySQL5.7で追加されたJSONデータ型を含むスキーマレスなドキュメントデータを、
mysqlxプラグインを利用する事でより柔軟に処理出来るようにする為に追加され、
MySQLをドキュメントデータベースとしてより利用し易くする為に追加された機能となっています。

MySQL Shellは、MySQLサーバの開発と管理をサポートする、
JavaScript、Python、SQLの対話型のインタフェースをサポートするMySQLの新しいコンポーネント。
データのクエリと更新処理だけでなく、様々な管理操作を実行する為にMySQLのシェルを使用することができます。
※MySQL Shellを利用する為には、事前にMySQL5.7.12以降に含まれているXプラグインをインストールしておく必要があります。

Xプラグイン
Xプロトコルを使用して通信を可能にするMySQLサーバプラグイン。
X DevAPIを実装するクライアントをサポートし、ドキュメントストアとしてMySQLを使用することができます。

Xプロトコル
Xプロトコルは、Xプラグインを実行しているMySQLサーバーと通信します。
Xプロトコルは、SSL経由でCRUDとSQL操作、認証の両方をサポートしていて、
コマンドのストリーミング処理を可能にし、プロトコルとメッセージレイヤ上に拡張可能。

root@localhost [information_schema]> select PLUGIN_NAME,PLUGIN_VERSION,PLUGIN_DESCRIPTION from plugins
    -> where PLUGIN_NAME = 'mysqlx';
+-------------+----------------+--------------------+
| PLUGIN_NAME | PLUGIN_VERSION | PLUGIN_DESCRIPTION |
+-------------+----------------+--------------------+
| mysqlx      | 1.0            | X Plugin for MySQL |
+-------------+----------------+--------------------+
1 row in set (0.00 sec)

root@localhost [information_schema]> 

【X Pluginインストール】
参照:http://dev.mysql.com/doc/refman/5.7/en/x-plugin-installation.html

通常通り、INSTALL PLUGINコマンドでインストール

root@localhost [mysql]> INSTALL PLUGIN mysqlx SONAME 'mysqlx.so';
Query OK, 0 rows affected (0.25 sec)

root@localhost [mysql]> show plugins;
+----------------------------+----------+--------------------+-------------------+-------------+
| Name                       | Status   | Type               | Library           | License     |
+----------------------------+----------+--------------------+-------------------+-------------+
| binlog                     | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| mysql_native_password      | ACTIVE   | AUTHENTICATION     | NULL              | PROPRIETARY |
| sha256_password            | ACTIVE   | AUTHENTICATION     | NULL              | PROPRIETARY |
| InnoDB                     | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| INNODB_TRX                 | ACTIVE   | INFORMATION SCHEMA | NULL              | PROPRIETARY |
| INNODB_LOCKS               | ACTIVE   | INFORMATION SCHEMA | NULL              | PROPRIETARY |
| INNODB_LOCK_WAITS          | ACTIVE   | INFORMATION SCHEMA | NULL              | PROPRIETARY |
| INNODB_CMP                 | ACTIVE   | INFORMATION SCHEMA | NULL              | PROPRIETARY |
<SNIP>
| MyISAM                     | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| MEMORY                     | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| CSV                        | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| BLACKHOLE                  | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| partition                  | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| FEDERATED                  | DISABLED | STORAGE ENGINE     | NULL              | PROPRIETARY |
| ARCHIVE                    | ACTIVE   | STORAGE ENGINE     | NULL              | PROPRIETARY |
| ngram                      | ACTIVE   | FTPARSER           | NULL              | PROPRIETARY |
| mecab                      | ACTIVE   | FTPARSER           | libpluginmecab.so | PROPRIETARY |
| MYSQL_FIREWALL             | ACTIVE   | AUDIT              | firewall.so       | PROPRIETARY |
| MYSQL_FIREWALL_USERS       | ACTIVE   | INFORMATION SCHEMA | firewall.so       | PROPRIETARY |
| MYSQL_FIREWALL_WHITELIST   | ACTIVE   | INFORMATION SCHEMA | firewall.so       | PROPRIETARY |
| mysqlx                     | ACTIVE   | DAEMON             | mysqlx.so         | PROPRIETARY |
+----------------------------+----------+--------------------+-------------------+-------------+
49 rows in set (0.00 sec)

root@localhost [mysql]> 

【X Plugin オプションと変数について】
設定パラメータに関しては、此方を参照下さい。
http://dev.mysql.com/doc/refman/5.7/en/x-plugin-option-variable-reference.html

【接続方法】
既に、mysqlshをインストール済みなので –sqlオプションを仕様してSQLを流し込んでみる。
mysqlxのPort33060(Default:mysqlx_port)から、ローカルのMySQLにアクセスしてSQLを実行しています。

【サンプルデータベース作成】
参照:
http://downloads.mysql.com/docs/world_x-db.zip
http://dev.mysql.com/doc/refman/5.7/en/mysql-shell-tutorial-javascript-download.html

mysqlsh経由でサンプルデータベースの作成して、mysqlクライアントで接続してスキーマとテーブルの確認

[root@misc01 MID2016]# mysqlsh -u admin -p --sql --recreate-schema world_x < world_x.sql
Enter password: 
Recreating schema world_x...

[root@misc01 MID2016]# mysql -u root -p -e "show databases like 'world%'"
Enter password: 
+-------------------+
| Database (world%) |
+-------------------+
| world             |
| world2            |
| world_x           |
+-------------------+
[root@misc01 MID2016]# mysql -u root -p -e "show tables from world_x"
Enter password: 
+-------------------+
| Tables_in_world_x |
+-------------------+
| City              |
| Country           |
| CountryInfo       |
| CountryLanguage   |
+-------------------+

【接続モード】
参考) 接続方法としては、現状では、以下のモードを選択できるようです。

# mysqlsh --help
MySQL Shell 1.0.3 Development Preview

<SNIP>

  --sql                    Start in SQL mode using a node session.
  --sqlc                   Start in SQL mode using a classic session.
  --js                     Start in JavaScript mode.
  --py                     Start in Python mode.

<SNIP>

こちらでは、mysqlsh経由でjava scriptモードの状態でJSONデータを処理してみます。


[root@misc01 MID2016]# mysqlsh -u admin -p 
Creating an X Session to admin@localhost:33060
Enter password: 
No default schema selected.

Welcome to MySQL Shell 1.0.3 Development Preview

Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type '\help', '\h' or '\?' for help.

Currently in JavaScript mode. Use \sql to switch to SQL mode and execute queries.
mysql-js> news_collection = session.getSchema('NEW57').createCollection("X_JSON");
<Collection:X_JSON>
mysql-js> news_collection.add({"id": 1, "name": "Document Data", "price": 60000, "Conditions": ["NEW", 2016]});
Query OK, 1 item affected (0.01 sec)

mysql-js> news_collection.find('name like :n').bind('n','Document%');
[
    {
        "Conditions": [
            "NEW",
            2016
        ],
        "_id": "26c8af795703e611630c0800279cea3c",
        "id": 1,
        "name": "Document Data",
        "price": 60000
    }
]
1 document in set (0.03 sec)

mysql-js>  

MySQLに接続してデータを確認した状態


root@localhost [NEW57]> desc X_JSON;
+-------+-------------+------+-----+---------+------------------+
| Field | Type        | Null | Key | Default | Extra            |
+-------+-------------+------+-----+---------+------------------+
| doc   | json        | YES  |     | NULL    |                  |
| _id   | varchar(32) | NO   | PRI | NULL    | STORED GENERATED |
+-------+-------------+------+-----+---------+------------------+
2 rows in set (0.00 sec)

root@localhost [NEW57]> select * from X_JSON\G
*************************** 1. row ***************************
doc: {"id": 1, "_id": "26c8af795703e611630c0800279cea3c", "name": "Document Data", "price": 60000, "Conditions": ["NEW", 2016]}
_id: 26c8af795703e611630c0800279cea3c
1 row in set (0.00 sec)

root@localhost [NEW57]> 

【Beta Draft】
X DevAPI User Guide / Overview
http://dev.mysql.com/doc/x-devapi-userguide/en/devapi-users-introduction.html
その他、X DevAPI経由でコーディング出来そう。但し、現時点ではベータリリースなのでもう少ししたら確認。

【その他:Status変数】
こちらで、mysqlx経由の処理を確認する事が可能です。


[root@misc01 MID2016]# mysql -u root -p -e "show status like 'mysqlx%'"
Enter password: 
+-------------------------------------+--------------------------+
| Variable_name                       | Value                    |
+-------------------------------------+--------------------------+
| Mysqlx_bytes_received               | 389773                   |
| Mysqlx_bytes_sent                   | 3466                     |
| Mysqlx_connection_accept_errors     | 0                        |
| Mysqlx_connection_errors            | 0                        |
| Mysqlx_connections_accepted         | 2                        |
| Mysqlx_connections_closed           | 2                        |
| Mysqlx_connections_rejected         | 0                        |
| Mysqlx_crud_delete                  | 0                        |
| Mysqlx_crud_find                    | 0                        |
| Mysqlx_crud_insert                  | 0                        |
| Mysqlx_crud_update                  | 0                        |
| Mysqlx_errors_sent                  | 1                        |
| Mysqlx_expect_close                 | 0                        |
| Mysqlx_expect_open                  | 0                        |
| Mysqlx_init_error                   | 1                        |
| Mysqlx_notice_other_sent            | 76                       |
| Mysqlx_notice_warning_sent          | 2                        |
| Mysqlx_rows_sent                    | 18                       |
| Mysqlx_sessions                     | 0                        |
| Mysqlx_sessions_accepted            | 1                        |
| Mysqlx_sessions_closed              | 1                        |
| Mysqlx_sessions_fatal_error         | 0                        |
| Mysqlx_sessions_killed              | 0                        |
| Mysqlx_sessions_rejected            | 1                        |
| Mysqlx_ssl_accepts                  | 0                        |
| Mysqlx_ssl_active                   |                          |
| Mysqlx_ssl_cipher                   |                          |
| Mysqlx_ssl_cipher_list              |                          |
| Mysqlx_ssl_ctx_verify_depth         | 18446744073709551615     |
| Mysqlx_ssl_ctx_verify_mode          | 5                        |
| Mysqlx_ssl_finished_accepts         | 0                        |
| Mysqlx_ssl_server_not_after         | Oct 19 05:28:15 2025 GMT |
| Mysqlx_ssl_server_not_before        | Oct 22 05:28:15 2015 GMT |
| Mysqlx_ssl_verify_depth             |                          |
| Mysqlx_ssl_verify_mode              |                          |
| Mysqlx_ssl_version                  |                          |
| Mysqlx_stmt_create_collection       | 0                        |
| Mysqlx_stmt_create_collection_index | 0                        |
| Mysqlx_stmt_disable_notices         | 0                        |
| Mysqlx_stmt_drop_collection         | 0                        |
| Mysqlx_stmt_drop_collection_index   | 0                        |
| Mysqlx_stmt_enable_notices          | 0                        |
| Mysqlx_stmt_execute_sql             | 69                       |
| Mysqlx_stmt_execute_xplugin         | 2                        |
| Mysqlx_stmt_kill_client             | 0                        |
| Mysqlx_stmt_list_clients            | 0                        |
| Mysqlx_stmt_list_notices            | 0                        |
| Mysqlx_stmt_list_objects            | 2                        |
| Mysqlx_stmt_ping                    | 0                        |
| Mysqlx_worker_threads               | 2                        |
| Mysqlx_worker_threads_active        | 0                        |
+-------------------------------------+--------------------------+
[root@misc01 MID2016]# 

参考までに、MySQL ShellのSQLモードの場合とjavascriptモードの場合では接続が3306か33060からの接続かどうかは以下のステータス変数でも確認する事が可能です。

【SQLモードの場合】


[root@misc01 MID2016]# echo "INSERT INTO T_UC01 VALUES (1,'mysql shell'),(2,'マイエスキュウエルシェル');" | mysqlsh -u demo_user -ppassword --sql --schema=world_x2
mysqlx: [Warning] Using a password on the command line interface can be insecure.
[root@misc01 MID2016]# 


root@localhost [sys]> show status like 'Mysqlx_crud%';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| Mysqlx_crud_delete | 0     |
| Mysqlx_crud_find   | 0     |
| Mysqlx_crud_insert | 0     |
| Mysqlx_crud_update | 0     |
+--------------------+-------+
4 rows in set (0.00 sec)

root@localhost [sys]> root@localhost [sys]> show status like 'Mysqlx_crud%';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| Mysqlx_crud_delete | 0     |
| Mysqlx_crud_find   | 0     |
| Mysqlx_crud_insert | 0     |
| Mysqlx_crud_update | 0     |
+--------------------+-------+
4 rows in set (0.00 sec)

root@localhost [sys]> 


【JavaScriptモードの場合】


[root@misc01 MID2016]# mysqlsh --uri demo_user@localhost/NEW57 -ppassword
mysqlx: [Warning] Using a password on the command line interface can be insecure.
Creating an X Session to demo_user@localhost:33060/NEW57
Default schema `NEW57` accessible through db.

Welcome to MySQL Shell 1.0.3 Development Preview

Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type '\help', '\h' or '\?' for help.

Currently in JavaScript mode. Use \sql to switch to SQL mode and execute queries.
mysql-js> db.createCollection("x_posts");
<Collection:x_posts>
mysql-js> db.x_posts.add({"title":"Hello World", "text":"This is the first post via mysqlx"});
Query OK, 1 item affected (0.01 sec)

mysql-js> db.x_posts.find("title = 'Hello World'").sort(["title"]);
[
    {
        "_id": "d2c6eb188b08e6113d110800279cea3c",
        "text": "This is the first post via mysqlx",
        "title": "Hello World"
    }
]
1 document in set (0.00 sec)

mysql-js> 

mysqlx経由のCRUDの実行数が確認出来る。
INSERT x 1回
SELECT x 1回


root@localhost [sys]> show status like 'Mysqlx_crud%';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| Mysqlx_crud_delete | 0     |
| Mysqlx_crud_find   | 0     |
| Mysqlx_crud_insert | 0     |
| Mysqlx_crud_update | 0     |
+--------------------+-------+
4 rows in set (0.00 sec)

root@localhost [sys]> show status like 'Mysqlx_crud%';
+--------------------+-------+
| Variable_name      | Value |
+--------------------+-------+
| Mysqlx_crud_delete | 0     |
| Mysqlx_crud_find   | 1     |
| Mysqlx_crud_insert | 1     |
| Mysqlx_crud_update | 0     |
+--------------------+-------+
4 rows in set (0.01 sec)

root@localhost [sys]> 


【参考】
http://dev.mysql.com/doc/refman/5.7/en/mysql-shell.html
http://dev.mysql.com/doc/refman/5.7/en/document-store.html
http://dev.mysql.com/doc/dev/connector-nodejs/
http://mysqlserverteam.com/mysql-5-7-12-part-3-more-than-just-sql/
http://mysqlserverteam.com/mysql-5-7-12-part-4-a-new-mysql-command-line-shell/

メモ:Node.jsのサンプルもあるので、後日、別途JSONドキュメント処理を実施してみる。
http://dev.mysql.com/doc/dev/connector-nodejs/