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[root@bug ~]# rpm -qa|grep mairadb

[root@bug ~]# rpm -qa|grep mysql

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[root@bug ~]# systemctl status firewalld.service

● firewalld.service - firewalld - dynamic firewall daemon

   Loaded: loaded (/usr/lib/systemd/system/firewalld.service; enabled; vendor preset: enabled)

   Active: inactive (dead)

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[root@bug ~]# yum install -y wget https://repo.mysql.com//mysql80-community-release-el7-1.noarch.rpm

[root@bug ~]# yum list|grep mysql

[root@bug ~]# yum install -y mysql-community-client.x86_64 mysql-router.x86_64 mysql-shell.x86_64

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[root@bug ~]# mysqlsh

 MySQL  JS >  dba.deploySandboxInstance(3310);

A new MySQL sandbox instance will be created on this host in

/root/mysql-sandboxes/3310

Warning: Sandbox instances are only suitable for deploying and

running on your local machine for testing purposes and are not

accessible from external networks.

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.

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[root@bug ~]# mysql -uroot -porange -S /root/mysql-sandboxes/3310/sandboxdata/mysqld.sock

mysql: [Warning] Using a password on the command line interface can be insecure.

Welcome to the MySQL monitor.  Commands end with ; or \g.

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MySQL  JS >  dba.deploySandboxInstance(3320);

MySQL  JS > dba.deploySandboxInstance(3330);

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MySQL  JS >  \connect root@localhost:3310

Creating a session to 'root@localhost:3310'

*****************************************************

 MySQL  localhost:3310 ssl  JS >  var cluster=dba.createCluster('test')

A new InnoDB cluster will be created on instance 'root@localhost:3310'.

*********************************************************

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.

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MySQL  localhost:3310 ssl  JS > cluster.addInstance( 'root@localhost:3320')

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

 MySQL  localhost:3310 ssl  JS > cluster.addInstance( 'root@localhost:3330')

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

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MySQL  localhost:3310 ssl  JS > dba.getCluster().status()

{

    "clusterName": "test",

    "defaultReplicaSet": {

        "name": "default",

        "primary": "localhost:3310",

        "ssl": "REQUIRED",

        "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"

            }

        }

    },

    "groupInformationSourceMember": "mysql://root@localhost:3310"

}

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[root@bug ~]#  mysqlrouter --bootstrap root@localhost:3310 --user=mysqlrouter

Please enter MySQL password for root: *****

Bootstrapping system MySQL Router instance...

Checking for old Router accounts

Creating account mysql_router2_j05xzi45m81x@'%'

MySQL Router  has now been configured for the InnoDB cluster 'test'.

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

Classic MySQL protocol connections to cluster 'test':

- Read/Write Connections: localhost:6446

- Read/Only Connections: localhost:6447

X protocol connections to cluster 'test':

- Read/Write Connections: localhost:64460

- Read/Only Connections: localhost:64470

Existing configurations backed up to '/etc/mysqlrouter/mysqlrouter.conf.bak'

[root@bug ~]# mysqlrouter&

[1] 25602

[root@bug ~]#  ps -ef|grep router

mysqlro+ 25602 22507  8 19:35 pts/0    00:00:01 mysqlrouter

root     25619 22507  0 19:36 pts/0    00:00:00 grep --color=auto router

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[root@bug ~]#  mysql -uroot -h 127.0.0.1 -P 6446 -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

********************************************************8

mysql>