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On this page
  • Adding a Load Balancer Listener
  • Adding a Network Load Balancer (NLB) Listener with a custom CIDR
  • Adding Security Groups for NLBs with custom CIDRs
  • Adding a Shared Load Balancer
  • Creating a Target Group Only Load Balancer for multiple services
  • Creating a Service Load Balancer with the type Target Group Only
  • Creating a Shared Load Balancer for the Target Group
  • Adding Routing Rules to the Shared Load Balancer
  • Viewing Shared Load Balancer rules
  • Updating Target Group attributes
  • Additional Load Balancer Settings
  • Restricting Open Access to Public Load Balancers

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  1. AWS User Guide
  2. AWS Services

Load Balancers

Creating Load Balancers for single and multiple DuploCloud Services

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Last updated 1 month ago

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DuploCloud provides the ability to configure Load Balancers with the type of Application Load Balancer, Network Load Balancer, and Classic Load Balancer.

DuploCloud provides the ability to configure Load Balancers with the following types:

  • Application Load Balancer - An ALB provides outbound connections to cluster nodes inside the EKS virtual network, translating the private IP address to a public IP address as part of its Outbound Pool.

  • Network Load Balancer - An NLB distributes traffic across several servers by using the TCP/IP networking protocol. By combining two or more computers that are running applications into a single virtual cluster, NLB provides reliability and performance for web servers and other mission-critical servers.

  • Classic Load Balancer - The legacy AWS Load Balancer (which was retired from AWS support, as of August 2022).

Load Balancers can be configured for Docker Native, EKS-Enabled, and ECS Services from the DuploCloud Portal. Using the Portal, you can configure:

  • Service Load Balancers - Application Load Balancers specific to one service. (Navigate to Docker -> Services or Kubernetes -> Services, select a Service from the list, and click the Load Balancer tab).

  • Shared and Global load balancers - Application or Network Load Balancers that can be used as a shared Load Balancer between Services and for Global Server Load Balancing (GSLB). (Navigate to Cloud Services -> Networking and select the Load Balancers tab).

DuploCloud allows one Load Balancer per DuploCloud Service. , create a Service Load Balancer of type Target Group Only.

Adding a Load Balancer Listener

See the following pages for specific information on adding Load Balancer Listeners for:

Adding a Network Load Balancer (NLB) Listener with a custom CIDR

To specify a custom classless inter-domain routing (CIDR) value for an NLB Load Balancer, edit the Load Balancer Listener configuration in the DuploCloud Portal.

  1. In the DuploCloud Portal, navigate Docker -> Services or Kubernetes -> Services.

  2. Select the Service name from the NAME column.

  3. Click the Load Balancers tab.

  4. Click Add in the Custom CIDR field of the Edit Load Balancer Listener pane.

Adding Security Groups for NLBs with custom CIDRs

Repeat this procedure for each custom CIDR that you want to add.

  1. Navigate to Administrator -> Infrastructure. The Infrastructure page displays.

  2. From the Name column, select the appropriate Infrastructure.

  3. Click the Security Group Rules tab.

  4. Click Add to add a Security Group. The Add Tenant Security pane displays.

  5. From the Source Type list box, select Ip Address.

  6. From the IP CIDR list box, select Custom. A field labeled CIDR notation of allowed hosts displays.

  7. In the CIDR Notation of allowed hosts field enter a custom CIDR and complete the other required fields.

  8. Click Add to add the Security Group containing the custom CIDR.

Repeat this procedure to add additional CIDRs.

Adding a Shared Load Balancer

  1. In the DuploCloud Portal, navigate to Cloud Services -> Networking.

  2. Click the Load Balancer tab.

  3. Click Add. The Create a Load Balancer pane displays.

  4. In the Name field, enter a name for the Load Balancer.

  5. From the Type list box, select a Load Balancer type.

  6. From the Visibility list box, select Public or Internal.

  7. Click Create.

Creating a Target Group Only Load Balancer for multiple services

Instead of creating a unique Load Balancer for each Service you create, you can share a single Load Balancer between multiple Services. This is helpful when your applications run distributed microservices where the requests use multiple services and route traffic based on application URLs, which you can define with Load Balancer Listener Rules.

To accomplish this, you:

  1. Create a Service Load Balancer with the type Target Group Only. This step creates a Service Load Balancer that includes a Target Group with a pre-defined name.

  2. Create a Shared Load Balancer with the Target Group that was defined.

  3. Create routing rules for the Shared Load Balancer and the Target Group it defines.

Creating a Service Load Balancer with the type Target Group Only

  1. In the DuploCloud Portal, navigate Docker -> Services or Kubernetes -> Services.

  2. On the Services page, select the Service name in the Name column.

  3. Click the Load Balancers tab.

  4. If no Load Balancers exist, click the Configure Load Balancer link. If other Load Balancers exist, click Add in the LB listeners card. The Add Load Balancer Listener pane displays.

  5. From the Select Type list box, select Target Group Only.

  6. You can create a Load Balancer Listener with a type of Target Group Only for Docker or EKS and ECS Services based on your application requirement. Complete the other required fields and click Add.

The Target Group Only Service Load Balancer is displayed in the LB Listeners area in the Load Balancers tab on the Services page.

Creating a Shared Load Balancer for the Target Group

  1. Navigate to Cloud Services -> Networking.

  2. Select the Load Balancer tab.

  3. Select the Shared Load Balancer you created from the NAME column. The Load Balancer details page displays.

  4. Select the Listeners tab, and click Add. The Add Load Balancer Listener pane displays.

  5. In the Port field, enter the port number for incoming traffic (e.g., 80 or 443).

  6. In the Protocol list box, select the protocol to use (e.g., HTTP or HTTPS).

  7. In the Action Type list box, select Forward to Target Group.

  8. Click Save. The Shared Load Balancer for the Target Group displays in the Listeners tab.

Adding Routing Rules to the Shared Load Balancer

Rules are not supported for Network Load Balancers (NLBs).

  1. Click Add. The Add LB Listener rule page displays.

  2. Create routing rules for the Target Group by setting appropriate Conditions. Add Routing Rules by specifying Rule Type, Values, and Forward Target Group. Forward Target Group lists all the Target Groups created for Docker Native, K8s, and ECS Services. Specify Priority for multiple rules. Use the X button to delete specific Values.

  3. Click Submit.

Viewing Shared Load Balancer rules

View the rules you defined for any Shared Load Balancer.

  1. In the DuploCloud portal, navigate to Cloud Services -> Networking.

  2. Select the Load Balancer tab.

  3. From the Name column, select the Load Balancer whose rules you want to view.

  4. Select the Listeners tab.

Updating Target Group attributes

Update attributes for your defined Target Group.

  1. In the DuploCloud portal, navigate to Cloud Services -> Networking.

  2. Select the Load Balancer tab.

  3. From the Name column, select the Load Balancer whose defined Target Group attributes you want to modify.

Additional Load Balancer Settings

You can use the Other Settings card in the DuploCloud Portal to set the following features:

  • WAF Web ACL

  • Enable HTTP to HTTPS redirects

  • Enable Access Logging

  • Set Idle Timeout

  • Drop invalid headers

  • Delete Protection

  1. In the DuploCloud Portal, navigate to Cloud Services -> Networking.

  2. Select the Load Balancers tab.

  3. Configure the settings, as needed.

  4. Click Save. The Load Balancer settings are updated.

  5. Click Save.

Restricting Open Access to Public Load Balancers

Restrict open access to your public Load Balancers by enforcing controlled access policies.

  1. From the DuploCloud Portal, navigate to Administrator -> System Settings.

  2. Select the System Config tab, and click Add. The Add Config pane displays.

  1. From the Config Type list box, select Flags.

  2. From the Key list box, select Deny Open Access To Public LB.

  3. In the Value list box, select True.

  4. Click Submit. Open access to public Load Balancers is restricted.

Before completing this task, you must .

In the LB Listeners area, select the Edit Icon () for the NLB Load Balancer you want to edit. The Edit Load Balancer Listener pane displays.

Add the Custom CIDR(s) and press ENTER. In the example below 10.180.12.0/22 and 10.180.8.0/22 are added. After the CIDRs are added, you .

Note the name of the created Target Group by clicking the Info Icon ( ) for the Load Balancer in the LB Listener card and searching for the string TgName. You will select the Target Group when you .

before performing this procedure.

In the Forward Target Group list box, select the Target Group that was created when you .

before performing this procedure.

In the Listeners tab, in the Target Group row, click the Actions menu ( ) and select Manage Rules. You can also select Update attributes to dynamically update Target Group attributes. The Listener Rules page displays.

Click the menu icon ( ) next to the rule you want to view, and select Manage Rules.

In the Listeners tab, in the appropriate Target Group row, click the Actions menu ( ) and select Update attributes.

Click the menu icon () in the row of the Load Balancer for which you want to configure Other Settings, and select Other Settings. The Other Load Balancer Settings pane displays.

added a Load Balancer with the Type Target Group Only in the previous step
EKS Load Balancers
ECS Service and Load Balancers
Native Docker Load Balancers
To share a load balancer between multiple Services
add a Load Balancer Listener of Type Network LB
add Security Groups for Custom CIDR(s)
Add a Shared Load Balancer
Create a Shared Load Balancer for the Target Group
create a Shared Load Balancer for the Target Group
Edit Load Balancer Listener pane with Custom CIDRs
Add Tenant Security pane for adding Custom CIDRs to Security Groups
Create a Load Balancer pane for a shared ALB
Add Load Balancer Listener pane for Target Group Only Type
Load Balancers tab
Load Balancers page with Listeners tab selected
The Add Load Balancer pane
Shared Load Balancer for the Target Group
The Load Balancer page, with the Listener actions menu highlighted
Add LB Listener rule page
Listener Rules page with Manage Rules option highlighted
The Other Load Balancer Settings pane
The Add Config pane in the DuploCloud Portal