Azure Classroomnotes 12/Jul/2023

Azure Virtual Machine Images

• Why vm becomes unusable after vm image creation?
  • As user specific information is removed before vm image creation
    
• Azure Images are of two types
  • Managed Image
    • snapshot of disk
    • meta data name, region, creation information
  • Compute Gallery: This was designed to have versions for the image, allow copying to multiple regions if required.
• Azure VM Image: Generally Azure VM Has the following attributes
  • Publisher: Who is publishing the image (user/organization)
  • Offer: This speaks about the vm image (ubuntu server/centos/redhat/Window Server)
  • SKU: This is category in the offer (ubuntu 16.04, redhat 7, centos 8)
  • Version: Specific build information (latest)
• Azure VM image urn is expressed as <publisher>:<offer>:<sku>:<version>
• Lets create a compute Gallery
  
  
  
  
  
  
  
  
  
• Now create a php info vm and capture the image into image defintion created above
  
• Create a vm from image and cross check the application

Exercise

• Create a compute gallery
• Create an image defintion
  • publisher => you
  • offer => learning
  • sku => php-info-ubuntu (php-info-redhat)
• Now create two vms one ubuntu and one redhat. install php-info
  • Capture the images in respective sku’s
• From any one image create a vm and install java `sudo apt install openjdk-11-jdk -y’ and create a new version