Azure Load balancer.
Load balancer
An Azure load balancer is a fully managed service in Azure, used to distribute traffic among backend virtual machines(mostly referred to as backend pool), providing high availability for your application. There are two types of load balancers:
Types of load balancers
internal load balancer - only balances traffic from within a virtual network. (mostly used to balance traffic to database servers)
Public load balancer - This is used to balance traffic from the internet to virtual machines.
Pricing
There are two pricing tiers when it comes to load balancers.
Basic tier: provides basic features and restricted to some limits like for backend pool size it is restricted to only 300 instances, it’s restricted to a single availability set and it only supports multiple frontends for inbound traffic
Standard tier: Standard tier load balancer is generally available and offers higher-scale and new features. It is a paid-for feature using a complex set of consumption-based charges and the Basic tier continues to be free. Also, we can scale out to 1000 instances and can span any virtual machine in a single virtual network, including blends of scale sets, availability sets, and machines.
[more information on pricing(https://docs.microsoft.com/en-us/azure/load-balancer/skus) ]
Load balancer hands-on:
What we will do:
- create 2 virtual machines. (They will be behind the Azure load balancer).
2.create a standard load balancer: Steps on creating a virtual machine
- Find the virtual machine icon on computing resources.
- choose a subscription if you don't have one click on create a new subscription. then give your virtual machine a name.
on inbound port rules.
enable HTTP port 80 (we will be using an IIS server)
- enable RDP on port 3389(this will enable you to remote desktop in the VM and install the IIS server)
Because we are creating a standard load balancer we have to change the SKU to stardard.
(click on networking)
- then change the SKU to standard.
- In management disable boot diagnostics for a fast start-up.
Then click on review and create.
repeat the above steps to create a second virtual machine. (add the second VM in the same resource group).
After you are done creating the virtual machines click on u connect to download the RDP file
then use your password and user name to log in to your VM.
to be continued...
