Azure Classroomnotes 25/Sep/2022

Availability Options for Virtual Machines in Azure

  • Options:
    • Availability Set: This has
      • Fault Domain: represents rack on the Datacenter
      • Update Domain: represents combination of vms required to be running so that the updates dont impact your application.
    • Zone Based: This is applicable to the locations with zones. This will create redundant vms in different zones. As you can see in the below image we selected two zones & it creates two vms in two different zones with same configuration.

Availabilty Set Demo

  • While creating a vm choose the Availability Options => Availability Set and Create a New Availability Set
  • After Succesful Creation of VM, Navigate to the Availability Set
  • Create one more vm and select the same availability set

Azure Virtual Machine Scale Sets (VMSS)

  • Lets explore Virtual machine Scale sets by Performing
    • Fixed Scaling
    • Dynamic Scaling (Elasticity)
  • This falls under Horizontal Scaling

Fixed Scaling with VMSS

  • Steps to be followed
    • Create a VM Image in Azure Compute Gallery with phpinfo and stress.
    • Commands:
      sudo apt update
      sudo apt install apache2 stress -y
      sudo apt install php libapache2-mod-php php-mysql -y
      echo "<?php phpinfo(); ?>" > info.php
      sudo cp info.php /var/www/html/info.php
  • Steps to be continued in the next session.

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