Create and manage Network Load Balancer

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Available in VPC

Network Load Balancer is a Load Balancer specialized in load distribution for high-capacity networks. It automatically adjusts its performance according to the scale of customer's service. It is a high-performance Load Balancer using DSR method, supporting TCP and UDP protocols.

Create Network Load Balancer

To create a Network Load Balancer, follow these steps:

  1. Access the NAVER Cloud Platform console.
  2. Click Services > Networking > Load Balancer in order.
  3. Click the Load Balancer menu.
  4. Click [Create Load Balancer] > [Create Network Load Balancer] in order.
  5. When the create Load Balancer screen appears, proceed with the following steps in order:

1. Create Load Balancer

Enter the information for the Network Load Balancer you wish to create and click the [Next] button.

  • Network: select the network type for Load Balancer.

    • Private IP: it processes the load balancing from the internal server using a Private IP within VPC. It cannot be accessed from outside VPC.
    • Public IP: the Public IP is set to allow calling from outside VPC or the Internet. It processes the load balancing, and you can utilize it by connecting with the domains or CDN services of customers using the random domain provided with the Public IP.

  • Load processing capacity: the capacity is adjusted automatically depending on the service even without selecting a separate Load processing capacity.

  • Target VPC: select the VPC to create a Load Balancer in.

  • Select subnet: select the Zone and Subnet to use to create the Load Balancer.

    Caution
    • The selected Zone and Subnet cannot be changed after the Load Balancer creation is completed.
    • Create and select a dedicated Subnet.
    • You can only select the Subnet included in the VPC you selected from Target VPC.
      • If you select Private IP, you can only select the Subnet created with a Private Load Balancer Subnet.
      • If you select Public IP, you can only select the Subnet created with Public Load Balancer Subnet.
      • For more information on how to create Subnets, see Create Subnet.
    • You do not need to create separate Subnets for each Load Balancer, however, we recommend a Subnet in the C Class (255.255.255.0) scale.

  • Public IP: select a Public IP that you possess or subscribe to a new Public IP.

2. Create Load Balancer (set listener)

  1. Select the protocol that the basic listener of Load Balancer will operate by.
  2. Set up the port to which the basic listener of Load Balancer will bind.
  3. Click the [Add] button.
    • A listener is added.
    • Repeat steps 1 to 3 to add multiple listeners.
    • You can add only one listener when creating a Load Balancer. If you need to add listeners, create a Load Balancer and see Add listener to add a listener.
    • To delete an added listener, click the [Delete] button.
  4. Click the [Next] button.

3. Select target group

Select the target group to apply load balancing and click the [Next] button.

  • To do this, the target group must be created in advance. If there is no created target group, click the [Create target group] button to create a target group. (See Create target group)
  • Among target groups created, only target groups that can be connected are displayed.
    • The Target Group for Network Load Balancer varies by the protocol type of the listener.
Caution
  • Network Load Balancer operates as Direct Server Return (DSR) for distributed processing with higher performance.
    However, using a Private IP Network Load Balancer may occur a communication restriction under the following circumstances:
    • When a server that belongs to the Target Group requests the same Network Load Balancer
    • When a client requests the same port as the Private IP Network Load Balancer or Target Group's server
  • The bandwidth of Load Balancer Subnet must be added to ACG of the bound server and NACL as an access source and allowed port.
Note
  • Network Load Balancer distributes loads by the 5-tuple Hash algorithm as the following. As result, once a new request comes into Load Balancer, it can be forwarded to other servers as the source port changes.
    • Source IP
    • Source Port
    • Destination IP
    • Destination Port
    • Protocol

4. View setting information

View the setting information for Load Balancer and click the [Create Load Balancer] button.

Manage Network Load Balancer

You can change the Load Balancer and set listeners for the created Network Load Balancer and check the monitoring information as a graph.

Note
  • You can change the server applied to Load Balancer in the Target Group menu. For more information, see Target setting.
  • Network Load Balancers cannot change the Subnet. If you want to change the Subnet, create a Load Balancer again.

Set Network Load Balancer

To view the setting information and change the setting for Load Balancer, follow these steps:

  1. On the NAVER Cloud Platform console, click Services > Networking > Load Balancer in order.
  2. Click the Load Balancer menu.
  3. Select the Load Balancer to view or change the setting information and click the [Change Load Balancer settings] button.
    • The Change Load Balancer settings popup window appears and you can view the setting information of the Load Balancer.
  4. After applying changes, click the [OK] button.
    • You can change load processing capacity.
      • Network Load Balancer created before the deployment on March 21, 2024 can be selected from Small, Medium, or Large depending on the load processing capacity.
      • Each size can handle at least 100,000/200,000/400,000 loads, respectively, based on connections per minute (CPS).
      • Network Load Balancer created after the deployment on March 21, 2024 can adjust the load processing capacity automatically.

Set listener

You can check the registered listeners on the change listener settings screen and add/change/delete them. You can view and change the rules.

Note

Network Load Balancer can't add or delete a rule.

To move listeners to the change settings page, follow these steps:

  1. On the NAVER Cloud Platform console, click Services > Networking > Load Balancer in order.
  2. Click the Load Balancer menu.
  3. Select the Load Balancer to change the listener setting and click the [Change listener settings] button.
    • When you move to the change listener settings screen, you can view the listeners you set upon creating the Load Balancer as a Default.

Add listener

To add listeners, follow these steps:

  1. Click the [Add listener] button on the change listener settings screen.
  2. Select the protocol for the listener you want to add.
  3. Enter the port number that the listener will bind to.
  4. Select the target group the listener's traffic will be forwarded to.
  5. Click [OK].

Change listener

To change listeners, follow these steps:

  1. Click the [Change listener] button on the change listener settings screen.
  2. To apply changes, see Add listener.
  3. Click [OK].

Delete listener

Note
  • Only if the Load Balancer is in the Operatingstatus, you can delete a listener.

To delete a listener, follow these steps:

  1. Select the listener you want to delete on the change listener settings screen.
  2. Click the [Delete listener] button.
  3. Check the content on the delete listener popup window and click the [Delete] button.
    • The selected listener is deleted.

View rules

You can view the registered rules on the view/change rules screen.

Rules have the following characteristics:

  • Each rule consists of actions (Network Load Balancers do not take conditions)
  • You cannot delete the Default rules
  • The rules are applied in priority order, and unapplied traffic operates following the Default rules

To view registered rules, follow these steps:

  1. Select the listener you want to view on the change listener settings screen.
  2. Click the [View/change rules] button.
    • Move to the View/change rules screen.

Change rules

To change rules, follow these steps:

  1. Select the listener you wish to change a rule for on the change listener settings screen and click the [View/change rules] button.
  2. Select the rule to change on the view/change rules screen and click the [Change rules] button.
  3. Apply the changes.
    • Change the Target Group at Action and click the [Add] button.
      • Weightings cannot be changed.
    • Click the [x] button to delete the added target group.
  4. Click [OK].

Network Load Balancer monitoring

You can check the regularly collected information for Concurrent connection, Connection per Second, Traffic In, Available Host Count and Unavailable Host Count for the selected period each as a graph.

Note

The collection cycle varies depending on the selected period. Monitoring information collected by handling load balancing can be set up and viewed for durations ranging from at least 1 minute to 1 year.

Aggregation interval View period
1-minute cycle Up to 6 hours
5-minute cycle Up to 1 day
30-minute cycle Up to 1 week
2-hour cycle Up to 1 month
1-day cycle 1 month exceeded

To check the monitoring information of the Network Load Balancer, follow these steps:

  1. On the NAVER Cloud Platform console, click Services > Networking > Load Balancer in order.
  2. Click the Load Balancer menu.
  3. Select a Load Balancer to monitor and click the [Monitoring] button.
    • The basic monitoring popup window for the Load Balancer appears, allowing you to view the monitoring information as graphs.
    • Select the period to view the monitoring information collected for the selected period.
    • Click the [Refresh] button to refresh the viewed graphs.
    • Click i_loadbalancer_enlargement to view an extended graph and click the [x] button to download the collected monitoring information as an Excel file.

Delete Network Load Balancer

Caution

If you delete a Load Balancer, rules set to the Route Table are deleted together. If you are using the Route Table rules in another service, they may not function normally after deleting a Load Balancer.

To delete a Network Load Balancer, follow these steps:

  1. On the NAVER Cloud Platform console, click Services > Networking > Load Balancer in order.
  2. Click the Load Balancer menu.
  3. Select a Load Balancer to delete and click the [Delete Load Balancer] button.
  4. Check the content in the delete Load Balancer popup window and click the [Delete] button.
    • The selected Load Balancer is deleted.
    • The public IP in use can be returned together. The unreturned IPs can be reassigned.