Creating an AWS EC2 Resource (RouteTable Scenario)

Here we will discuss how the Route Table can be used to switch between nodes by creating an entry in the Route Table that points to the active node.

Create an IP Resource

Now you can create an IP resource. Note that the IP address of the resource must be located outside of the VPC. In this example, the IP resource is created using 10.10.10.10 (the VPC is defined as 10.20.0.0/16). Refer to Creating an IP Resource for more information.

Once the IP resource has been created, the LifeKeeper User Interface should look like this.

Assign Permission to Update Route Table Entries to Instances

!To complete the steps below, the AWS CLI must be installed on each node.

• Install AWS CLI

• Assign Permission to Use EC2 Recovery Kit

Add Initial Route Table Entry for the Primary Host

Before creating the EC2 resource, we must first add the initial route to the route table for LK-VPC (i.e., LK-RouteTable).

1. In the AWS Console, navigate to Services → VPC → Route Tables, click the route table associated with LK-VPC (LK-RouteTable), click the Routes tab, then click Edit Routes.

2. In the resulting dialog, add a new route with the following parameters:

3. Click Save changes to add the route to the route table.

Creating an EC2 Resource (Route Table Scenario)

!Before creating the EC2 resource, ensure that source/destination checking has been disabled for all cluster nodes by following the steps given in AWS – Disable Source/Destination Checking.

Creating an EC2 Resource should be straightforward once an IP Resource has been created.

1. Select the “Operations” dropdown and click “Create Resource Hierarchy”

2. Select “node-a” as the server and “Amazon EC2” as the Application Recovery Kit. Then click “NEXT”.

3. For the “Resource Type” selection, choose “Route Table”. Select the existing virtual IP resource as well. Then click “NEXT”.

4. On the “Additional Settings” stage, select the following options. Then click “NEXT”.

*Note: For items with a checkmark ( ) review the default value and use the value suggested.

Field	Value
EC2 Resource Tag	ec2-10.10.10.10
Switchback Type	Intelligent

5. Review the configured settings, then click “Execute”.

6. After the resource has been created, click the “Extend Resource Hierarchy” button. You will then be prompted to select the target server and target priorities.

Field	Value
Target Server	node-b
Target Priority	10

7. Once Pre-Extend checks are completed, click ““NEXT”.
8. In the “Additional Settings” stage, select “Intelligent” for Switchback Type and the ec2 resource created in steps 1-5. Then click ““NEXT”.

Field	Value
Switchback Type	Intelligent
Resource	ec2-10.10.10.10

9. Review and confirm the options displayed, and when ready click “Execute”.
10. The EC2 resource is created as shown below.