Virtual IP
Scenarios for Virtual IP
Add an Virtual IP to an instance is useful when you want to:
Have a secondary or sub IP address in OS for some special use case (eg LVS, sub interface…)
Create a low-budget, load-balance, high-availability solution.
Virtual IP basics
A virtual IP address can be shared among multiple vServer Instance. An instance can have both private and virtual IP addresses, and you can access the instance through either IP address. A Virtual IP address has the same network access capabilities as a private IP address.
You can assign instances deployed in active/standby mode with the same Virtual IP address. Virtual IP addresses can work together with Keepalived to ensure high availability and disaster recovery. If the active instance is faulty, the standby instance automatically takes over services from the active one. It can be configured for HA or as load balancing clusters.
Work with Virtual IP
Create Virtual IP
Go to VNG Cloud portal console, navigate to Virtual IP page
Select VPC and subnet for the Virtual IP address. Only instances in the same subnet with Virtual IP can be assigned to use the Virtual IP
After create you will get the IP information
Next step is assign Virtual IP to Instances, expand the detail of Virtual IP and go to tab Address Pair Interface, click Add Address Pair Interface and select Instances that you want to assign
Add/Remove Virtual IP to/from Instance
After create Virtual IP, you need to assign it to Instances:
Go to VNG Cloud portal console, navigate to Virtual IP page
Expand the detail of Virtual IP and go to tab Address Pair Interface, click Add Address Pair Interface/Remove Address Pair Interface and select Instances that you want to assign or remove
You will need to configure network from within instance to make Virtual IP works
Delete Virtual IP
Go to VNG Cloud portal console, navigate to Virtual IP page
Select Virtual IP and click Delete on the right side
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