Up:: Microsoft Azure Developer Associate AZ-204 2023

Azure Arm Templates

Introduction to ARM Templates

• What Is IaC (Infrastruction as Code)
  • managing and provisioning computer data centers using scripts or machine readable definition files like JSON
  • Two types
    • Declarative - Know exactly what you want
    • Imperative - Know some of what you want and service fills in the blanks
• ARM Templates are JSON files that define azure resources
  • declarative
  • reduce configuration mistakes
• With ARM templates your can
  • declarative
  • establish base line for compliance
  • Modularity
  • …
• Skeleton
  • $schema - rules for definition
  • contentVersion - version of the template
  • apiProfile -
  • parameters
  • variables
  • functions
  • resources
  • outputs
• ARM Template Resources
  • Resource you want to provision
    • type
    • apiVersion
    • name - has to be unique
    • location - region to deploy in
    • Other properties - dependant on resource type
• ARM Template Paramaters
  • pass variables to the ARM Template
    • type
    • defaultValue
    • allowedValues
    • minValue
    • maxValue
    • minLength
    • maxLength
    • description
• ARM Template Functions
  • Allow transformations for variables
    • Built In Functions
      • Array
      • Comparison
      • Date
      • Deployments
      • Logical
      • Numerical
      • Object
      • Resource
      • String
• ARM Templates Variables
  • Used to simplify ARM Templates
• ARM Templates Outputs
  • Return values from deployed resource so you can use it programmatically
• 02:47:13 ARM Templates Follow Along
  • Search for Deployments
  • Select Custom Templates
  • Add resource by using the Add Resource button
  • Copy Code to save to change later, templates once saved can’t be edited
  • Use Worf for all inputs
  • Template generated has the wrong VM Size in the variables
  • Deploys all it can
  • No Rollback feature
  • Have to delete all resources and template to replace template
  • Export resource group items as template to use them later - Good for exporting
• ARM Templates Cheat Sheet
  • IaC
    • Declarative
    • Imperative
  • JSON Files
  • Know the structure of the templates

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