Create TCP Load Balancer

In this section we will create a TCP load balancer so we can present the MongoDB in both the UDF and AWS sites. This will be needed so that the API service running in the AWS site can access the on-premise database.

Exercise 1: Create MongoDB Origin Pool

1. In F5 Distributed Cloud Console ensure you are in the Load Balancers context.

   

2. Ensure you have selected your assigned namespace

3. Navigate the menu to go to Manage -> Load Balancer, then click Origin Pools.

   

4. Click the Add Origin Pool button.

   

5. Enter the following variables:

   Variable	Value
   Origin Pool Name	brews-mongodb
   Select Type of Origin Server	IP address of Origin Server on given Sites
   IP address	10.1.1.4
   Site	Your UDF site
   Select Network on the site	Outside Network
   Port	27017

   

6. Under the List of Health Check(s) section, click the Select healthcheck dropdown.

7. Click the Create new Healthcheck button.

8. Enter the following variables:

   Variable	Value
   Name	brews-mongodb
   Health Check	TCP HealthCheck

9. Click on the “Configure” button to open the dialog to adjust timeout settings then click “Apply”

10. Click the Continue button to close the Health Check Parameters dialogue.

11. Click the Save and Exit button to close the Origin Pool dialogue.

Exercise 2: Create MongoDB TCP Load Balancer

1. In F5 Distributed Cloud Console ensure you are in the Load Balancers context.

   

2. Navigate the menu to go to Manage -> Load Balancer, then click TCP Load Balancers.

   

3. Click the Add TCP Load Balancer button.

4. Enter the following variables:

   Variable	Value
   Name	brews-mongodb
   Listen Port	27017
   Where to Advertise the VIP	Advertise Custom

   

5. Configure Domains

   • Under the Domains section (above the port configuration) click the Add item button.

   • Enter a domain:

     Variable	Value
     Domain	your_namespace-mongodb.brews.local

6. Configure Origin Pools

   • Under the Origin Pools section, click the Configure link.

   • Click the Add item button.

   • Select the brews-mongodb pool.

   • Click the Apply button to close the Origin Pools dialogue.

7. Configure Advertisement

   • Under Advertise Custom click the Configure link.

   • You will need to add two sites:

     • Your UDF site:

       Variable	Value
       Select Where to Advertise	Site
       Site Network	Outside Network
       Site Reference	Your UDF site

     • Your AWS site:

       Click on “Add Item” to input your second site.

       Variable	Value
       Select Where to Advertise	Site
       Site Network	Outside Network
       Site Reference	Your AWS Site

     

   • Click the Apply button to exit the Advertise Custom dialogue.

8. Click the Save and Exit button to exit the TCP Load Balancer dialogue.

Exercise 2: Configure Demo Application

Now that we have an internal TCP load balancer for MongoDB we need to configure the demo application to use it.

1. Open the demo application in your browser.

   Note

   If you do not remember the FQDN, you can look under Manage -> Load Balancers to get it.

2. Click on the information icon.

   

3. Click on the gear icon for the database.

   

4. Enter the TCP load balancer hostname: your_namespace-mongodb.brews.local

   

5. Click the button or press Enter.

   If everything is working correctly, the database cart should not turn red. You can also add and remove items from your cart for a further test.

   

Packet flow

Below is the packet flow for the architecture you just deployed in F5 Distributed Cloud.

You have reached the end of this lab. For instructor-led courses, do not continue until instructed to do so.