Changing the Subnet of a Cluster

Updated on 2024-11-29 GMT+08:00

View PDF

If the current subnet does not have sufficient IP addresses, you can change to another subnet in the same VPC of the current cluster to obtain more available subnet IP addresses. Changing a subnet does not affect the IP addresses or subnets of existing nodes.

For details about how to configure network ACL outbound rules, see How Do I Configure a Network ACL Outbound Rule?

Changing a Subnet When No Network ACL Is Associated

Log in to the MRS console.
Click the target cluster name to go to its details page.
Click Change Subnet on the right of Default Subnet.
Select the target subnet and click OK.

If no subnet is available, click Create Subnet to create a subnet first.

Changing a Subnet When a Network ACL Is Associated

Log in to the MRS console and click the target cluster to go to its details page.
In the Basic Information area, view VPC.
Log in to the VPC console. In the navigation pane on the left, choose Virtual Private Cloud and obtain the IPv4 CIDR block corresponding to the VPC obtained in 2.

Figure 1 Obtaining the IPv4 CIDR block
Choose Access Control > Network ACLs and click the name of the network ACL that is associated with the default and new subnets.

NOTE:

If both the default and new subnets are associated with a network ACL, add inbound rules to the network ACL by referring to 5 to 7.

Figure 2 Network ACLs
On the Inbound Rules page, choose More > Insert Rule Above in the Operation column.
Add a network ACL rule. Set Action to Allow, Source to the VPC IPv4 CIDR block obtained in 3, and retain the default values for other parameters.
Click OK.

NOTE:

If you do not want to allow access from all IPv4 CIDR blocks of the VPC, add the IPv4 CIDR blocks of the default and new subnets by performing 8 to 12. If the rules for VPC IPv4 CIDR blocks have been added, skip 8 to 12.
Log in to the MRS console.
Click the target cluster to go to its details page.
Click Change Subnet on the right of Default Subnet.
Obtain the IPv4 CIDR blocks of the default and new subnets.

NOTICE:

In this case, you do not need to click OK displayed in the Change Subnet dialog box. Otherwise, the default subnet will be updated to the new subnet, thereby making it difficult to query the IPv4 CIDR block of the default subnet. Exercise caution when performing this operation.
Add the IPv4 CIDR blocks of the default and target subnets to the inbound rules of the network ACL bound to the two subnets by referring to 4 to 7.
Log in to the MRS console.
Click the target cluster to go to its details page.
Click Change Subnet on the right of Default Subnet.
Select the target subnet and click OK.

How Do I Configure a Network ACL Outbound Rule?

Method 1
Allow all outbound traffic. This method ensures that clusters can be created and used properly.
Method 2
Allow the mandatory outbound rules that can ensure the successful creation of clusters. You are not advised to use this method because created clusters may not run properly due to absent outbound rules. If the preceding problem occurs, contact O&M personnel.

Similar to the example provided in method 1, set Action to Allow and add the outbound rules whose destinations are the address with Secure Communications enabled, NTP server address, OBS server address, OpenStack address, and DNS server address, respectively.

Parent topic: Cluster O&M

Previous topic: Importing and Exporting Data

Next topic: Configuring Message Notification

Feedback

Was this page helpful?

Helpful Not helpful

Provide feedback

Thank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.

The system is busy. Please try again later.

Which of the following issues have you encountered?

Content is inconsistent with the product UI

Unclear descriptions

Lack of examples or code

Incorrect steps

Can't find what I need

Lack of best practices

Feedback (optional)

0/500

Select at least one type of issue, and enter your comments or suggestions.

Enter a maximum of 500 characters.

Submit Cancel

For any further questions, feel free to contact us through the chatbot.

Chatbot