Azure Virtual Machine Scale Set

• Orchestration Modes:
  • Uniform
  • Flexible
• Predictive Scaling

Auto update vm images in VMSS

• Using phpinfo image definition create a vmss with 2 instances to start with
• verify if the application is accesible or not
• Now create a new version of the phpinfo, Add the following steps to php info image based vm and capture the image

sudo -i
echo "Version 2"  > /var/www/html/index.html

• Steps:
  • Create a vmss with php info with 2 instances to start with
  • Create a vm from php info image and add above mentioned steps capture the vm image as a new version to existing definiton
• Uniform Orchestartion:
  • upgrade policy:
    • manual => update images manually
    • automatic => updated automatically in random order
    • Rolling update => Updated automatically in batches
      
• Flexible Orchestration:
  • in this mode to upgrade images, this is manual in nature