A namespace is a basic unit for managing deployments in Realtime Compute for Apache Flink. Configurations, deployments, and permissions of each namespace are separately managed. After you purchase a Realtime Compute for Apache Flink workspace, a default namespace is generated in the workspace. The suffix of the namespace is default. You can create multiple namespaces and assign separate resources and permissions to each namespace. This way, the resources and permissions of multiple tenants are isolated among namespaces. This topic describes how to create, go to, view, and delete a namespace.
Prerequisites
A workspace is created. For more information, see Activate Realtime Compute for Apache Flink.
The RAM user or RAM role is granted the required permissions to access the Realtime Compute for Apache Flink console and manage namespaces. For more information, see Grant permissions to a RAM user.
Create a namespace
Log on to the management console of Realtime Compute for Apache Flink.
Check that the number of available compute units (CUs) in the desired workspace is greater than 1. For more information about how to reconfigure resources, see Reconfigure resources.
Find the desired workspace and choose in the Actions column.
Parameter
Description
Project Name
The namespace name can contain lowercase letters, digits, and hyphens (-). The namespace name must start with a lowercase letter and cannot end with a hyphen (-).
NoteThe namespace name cannot be the same as the name of an existing namespace.
After you create a namespace, you cannot change the name of the namespace.
CU Type
The CU type that you must configure for workspaces with cross-zone resources. Valid values:
Single zone: Zone-disaster recovery is not supported. A namespace that uses single-zone CUs has the risk of service interruptions due to a single zone failure. Zones in the same region can communicate with each other. The service level agreement (SLA) of the zones ensures that the network latency is less than 3 ms. For more information, see Average Latency among Zones.
Cross zone: Cross-zone high availability provides higher availability and zone-disaster recovery. For a namespace that uses cross-zone CUs, if the zone in which a deployment is run fails, the deployment can be resumed in other stable zones of the same region. This ensures the continuity and high availability of deployments. For more information, see Cross-zone high availability.
Allocate Resources
A namespace requires at least one CU.
For a workspace that uses hybrid billing, you can configure only fixed resources when you create a namespace. After you create a namespace, you can configure the maximum number of available elastic resources for the namespace. For more information, see Reconfigure resources.
Click OK.
Go to a namespace
Log on to the management console of Realtime Compute for Apache Flink and use one of the following methods to go to a namespace:
Find the desired workspace and click Console in the Actions column. In the upper-left corner of the development console of Realtime Compute for Apache Flink, select the desired namespace.
Click the
icon on the left side of the ID of the desired workspace and click the name of the desired namespace.
View and delete a namespace
Log on to the management console of Realtime Compute and click the icon on the left side of the ID of the desired workspace.
To view a namespace: In the namespace list, view the namespace information in columns, such as Status, CU Type, and Created At.
To delete a namespace: Find the desired namespace, click Delete in the Actions column. In the message that appears, click OK.
ImportantAfter you delete a namespace, deployments and data in the namespace cannot be restored. Proceed with caution.
References
After you create a namespace, you can click the name of the namespace to go to the development console of Realtime Compute for Apache Flink to develop a draft. For more information, see Draft development.
To allow multiple users to use a namespace to perform operations such as draft development and deployment O&M, you must grant permissions on the namespace to the users. For more information, see Grant permissions on namespaces.
For the basic concepts of Realtime Compute for Apache Flink, see Basic concepts.