Creating an IP Resource

This section describes how to create an IP resource. The IP resource creates and protects a virtual IP address that can be switched between cluster nodes.

System Configuration

The environment created in this guide is a two-node configuration as shown below.

Prepare a virtual IP address that can be pinged (10.1.6.100 in the above figure).
Also prepare a system that can be pinged (10.1.6.90 in the above).

Check for a ping response using the following command:

# ip -4 addr add 10.1.6.100/24 dev ens192
 
# ping -c3 -I 10.1.6.100 10.1.6.90

There should be a ping response.

Once the ping response is verified, remove the IP address from the interface.

# ip -4 addr delete 10.1.6.100/24 dev ens192

Restrictions:

• Make sure that the virtual IP address you are trying to create is unique.
• Make sure that there is a system (other than the cluster nodes) that can respond to pings on the same network as the virtual IP address.
  

Note: IP resources use ping to validate the health of the network. Therefore, you need a system outside the cluster that can respond to pings.

Perform the following steps on target1

1. Creating a resource
   Execute the following command:

[target1]# lkcli resource create ip --tag ip-tag --ipaddr 10.1.6.100 

Resource Settings

Item	Input Value
--tag	Tag name
--ipaddr	Virtual IP address

2. Configuring a ping list
   Run the following command to configure a ping list.

[target1]# lkcli resource config ip --tag ip-tag --pinglist 10.1.6.90

Then bring the resource in service.

[target1]# lkcli resource restore --tag ip-tag

3. Extending a resource
   Execute the following command:

[target1]# lkcli resource extend ip --tag ip-tag --dest target2

Resource Settings

Item	Input Value
--tag	Tag name of the created resource
--dest	Backup node name

4. Setting up a ping list for the extended resource
   Run the following command to set up a ping list for the extended resource as well.

[target1]# lkcli resource config ip --tag ip-tag --pinglist 10.1.6.90 --remote target2

5. Checking the resource
   After creating and extending the resource, run the following command.
   The resource information is displayed.

[target1]# lkcli status -q
LOCAL    TAG     ID             STATE     PRIO  PRIMARY
target1  ip-tag  IP-10.1.6.100  ISP          1  target1

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