Activate Realtime Compute for Apache Flink and create a project - Exclusive Mode| Alibaba Cloud Documentation Center

This topic describes how to activate Realtime Compute for Apache Flink in exclusive mode and how to create Realtime Compute for Apache Flink clusters and projects in exclusive mode.

Activate Realtime Compute for Apache Flink in exclusive mode

Note A Realtime Compute for Apache Flink cluster in exclusive mode can access only storage resources in the same virtual private cloud (VPC), region, and security group as the cluster. To allow the cluster to access resources in another VPC, use Express Connect to access the network.

After you place an order for Realtime Compute for Apache Flink in exclusive mode, you must create a cluster before you create a project.

Activate Realtime Compute for Apache Flink.
1. Log on to the product page of Realtime Compute for Apache Flink.
  
  Note Use your Alibaba Cloud account instead of a Resource Access Management (RAM) user to activate Realtime Compute for Apache Flink and create a project. If you do not have an Alibaba Cloud account, create one.
2. Click Console.
3. Click Buy Now under Blink Exclusive Cluster to go to the buy page of Realtime Compute for Apache Flink.
4. Click Realtime Compute Exclusive Mode (Subscription) or Realtime Compute Exclusive Mode (Pay-As-You-Go).
5. Configure the parameters, such as the region, cluster configuration, and billing duration.
6. Click Buy Now.
7. Read and select I have read and agree to Realtime Compute Exclusive Mode (Subscription) Agreement of Service.
8. Click Pay.
Create a Realtime Compute for Apache Flink cluster.
- Preparations
  - After you activate Realtime Compute for Apache Flink in exclusive mode, Realtime Compute for Apache Flink creates a security group in your VPC and applies for an elastic network interface (ENI). For more information, see ENI overview.
    
    Note Do not delete this security group or ENI. Otherwise, the cluster cannot be created.
    - If you have VPCs, specify a VPC for Realtime Compute for Apache Flink.
    - If you do not have a VPC, activate the Alibaba Cloud VPC service first. For more information about how to activate the Alibaba Cloud VPC service, see Plan and design a VPC.
      Note When you create a VPC, make sure that:
      
      Sufficient Elastic Compute Service (ECS) instances are available in the VPC. If ECS instances are insufficient, submit a ticket.
      
      The number of available IP addresses in a vSwitch is greater than or equal to the number of nodes in a Realtime Compute for Apache Flink cluster. For more information, see View the nodes of a Realtime Compute for Apache Flink cluster.
  - You can upload UDF packages to a Realtime Compute for Apache Flink cluster in exclusive mode. To ensure data security, Realtime Compute for Apache Flink stores the UDF packages to an Object Storage Service (OSS) bucket. You must specify the OSS bucket. If you do not have an OSS bucket, create one first. For more information about how to create an OSS bucket, see Create buckets.
  - Grant a RAM role to Realtime Compute for Apache Flink in exclusive mode.
- Procedure
  1. After you complete the payment, click Console.
  2. On the Clusters page, click Create Cluster.
    
    Note If you have not created a project for an order, a red number is displayed in the upper-right corner of Create Project on the Project Management > Projects page. The number indicates the number of orders for which you have not created a project.
  3. In the Select Order step, select an order in Order ID and click Next.
  4. In the Basic Information step, configure Cluster Name and Cluster Description and click Next.
  5. In the Cluster Settings step, enter configuration information and click Next.
    
    Note The Realtime Compute for Apache Flink cluster must reside in the same security group, region, and VPC as both the upstream and downstream data stores you purchased.
    - OSS Bucket
      Select an OSS bucket to store your UDF packages. If you do not have OSS buckets, create one first. For more information, see Create buckets. When you create an OSS bucket, you must specify Standard for Storage Class. We recommend that you specify Private for Access Control List (ACL). Do not select Public Read.
    - VPC
      Select the VPC that you want to access and customize the name of the VPC.
      
      Note Realtime Compute for Apache Flink can identify only custom VPC names.
    - Zone
      After you properly configure the VPC, the system automatically displays the available zones.
      
      Note No zone or vSwitch is available in the following scenarios:
      
      ECS instances in the selected zone are insufficient. For more information about how to add an ECS instance, see Create an instance by using the wizard.
      
      The number of available IP addresses in the selected vSwitch is less than the number of nodes in a Realtime Compute for Apache Flink cluster. For more information, see View the nodes of a Realtime Compute for Apache Flink cluster.
  6. In the Confirm step, click Create.
    
    Note When you create a cluster, it takes about half an hour for the cluster status to change from Starting to Running. If the cluster status does not change after a long period of time, submit a ticket.
Create a project.
1. In the left-side navigation pane, choose Cluster Management > Clusters. Find the cluster for which you want to create a project and click Create Project in the Actions column.
2. In the Create Project dialog box, configure Project Name and Project Description, and slide the pointer on the right side of Specified CUs to specify the required number of CUs.
3. Click OK.