How Do I Grant the Select Permission at the Database Level to ClickHouse Users?
Question
How do I grant the Select permission at the database level to ClickHouse users?
Answer
- Log in to the node where the ClickHouse client is installed in the MRS cluster and run the following commands:
su - omm
source {Client installation directory}/bigdata_env
kinit Component user (You do not need to run the kinit command for normal clusters.)
clickhouse client --host IP address of the ClickHouse node --port 9000 -m --user clickhouse –password 'Password of the ClickHouse user'
- View the password of the ClickHouse user.
Log in to FusionInsight Manager and choose Cluster > Services > ClickHouse. Click Instance and click any ClickHouseServer role name. Go to the Dashboard tab page of ClickHouseServer, click the users.xml file in Configuration File area, and view the password of the ClickHouse user.
- Commands containing authentication passwords pose security risks. Disable the command recording function (history) before running such commands to prevent information leakage.
- View the password of the ClickHouse user.
- You can use either of the following methods to create a role with the read-only permission for a specified database:
Method 1
- Creating a role with the read-only permission for a specified database (the default database is used as an example)
Log in to FusionInsight Manager and create a role with the read-only permission for a specified database, for example, ck_role. For details, see ClickHouse User Rights.
- Granting the read-only permission role to a common user
- Viewing user permissions
select * from system.grants where role_name = 'ck_role';
Method 2
Creating a user with the read-only permission for a specified database
- Creating a user:
Log in to FusionInsight Manager and create a user, for example, user_01. For details, see ClickHouse User Rights.
- Creating a role with the read-only permission for a specified database (the default database is used as an example)
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