Installing Keepalived on Ubuntu 20.04

Keepalived is a powerful tool used for high availability and load balancing in a Linux environment. It is designed to monitor services or servers and automatically take over in the event of a failure, ensuring that your applications remain available without interruption.

To install Keepalived on Ubuntu 20.04, you can follow these steps:

Step 1: Update Package Lists

Before installing any software, it is recommended to update the package lists on your system:

sudo apt update

Step 2: Install Keepalived

You can install Keepalived by running the following command:

sudo apt install keepalived

Step 3: Configure Keepalived

Once Keepalived is installed, you need to configure it according to your specific requirements. The configuration file for Keepalived is located at /etc/keepalived/keepalived.conf.

Open the configuration file using a text editor:

sudo nano /etc/keepalived/keepalived.conf

Inside the configuration file, you can define virtual IP addresses, health checks, and load balancing algorithms. Make sure to consult the Keepalived documentation for the specific configuration options and syntax.

Step 4: Start and Enable Keepalived

After configuring Keepalived, you can start and enable the service using the following commands:

sudo systemctl start keepalived
sudo systemctl enable keepalived

Keepalived will now be running on your system, monitoring your services and managing the virtual IP addresses.

It is important to note that Keepalived's functionality is highly dependent on your specific setup and requirements. Therefore, it is recommended to refer to the official Keepalived documentation for more detailed instructions and examples.