Load Balancing in Azure
- Azure has two types of Load Balancers
- Azure Load Balancer: This is layer 4 load balancer
- Azure Application Gateway: This is Layer 7 Load balancer
- Load Balancers in Azure can be private/internal i.e. they can be accessed only within VNET and public/external load balancers where a public ip is assigned to the Azure Loadbalancer
- Lets create a virtual network with 3 subnets
- web
- app
- db
- In the web subnet create a vm and install apache server with php info page
- Create one more server in the web subnet & install the same as above
sudo apt update
sudo apt install apache2 -y
sudo apt install php libapache2-mod-php php-mysql -y
sudo -i
echo "<?php phpinfo(); ?>" > /var/www/html/info.php
- Health Check for this application can be done by sending http packet on server ip and expect a 200 status code. This would be our health probe.
- Azure Load Balancer SKU’s:
- Basic
- Standard
- Refer Here for loadbalancer skus
- SKU Comparision Refer Here and limitations Refer Here
- For pricing Refer Here
-
Create a Standard Load Balancer
-
Azure application gateway: This is layer 7 load balancing service from azure
- Refer Here for the official docs
- Create one more vm in the web subnet and install any app. in this series i’m installing nginx.
sudo apt update
sudo apt install nginx -y
- Traffic Manager is used for multi region routing Refer Here
