Azure Infrastructure: Exam 70-533 - Azure Deployment Model

in #technology • 7 years ago

Continuing on from looking at tools to manage Azure, these are quick notes on the Azure deployment model, how resources and resource groups interact, deployment methodologies and how templates and policies work.
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Deployment Model

Core concepts

  • Resources
    The individual building blocks for creating solutions. Contained in one and only one resource group
  • Resource Groups
    Bounding containers of resources. Useful for lifecycle, billing or reporting boundaries around resources.
  • Role Based Access Control (RBAC)
    Provides granular permissions to subscriptions, resource groups and resources to users and service principals within the Active Directry tenant. Can be applied to groups or individual identities.
  • Tags
    Custom names that can be applied against subscriptions, resource groups or resources. Useful for scripting, aggregating billing, reporting
  • Templates
    JSON structured documents that deploy a a related set of resources for a whole or part of a solution. Can be parameterized. They declare and end state : Make it so type deployment.
  • Policies
    JSON structured documents that are assigned to subsciptions that can affect a deployment. Can implement facets of governance or policies such as ensuring tags, limiting infrastructure or ensuring geographic compliance.
  • Locks
    Read only or Delete, used primarily to prevent accidental modification or deletion of resources.

Moving resources

Resources can be moved between groups and subscriptions

  • Cannot change a resources location
  • Both groups are locked during the move process
  • Moving subscriptions require the same AD tenant
  • All dependencies must be moved together

Deployment methodologies

  • Imperative
  • Declarative

ARM Templates

{
   "$schema": "http://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
   "contentVersion": "",
   "parameters": {  },
   "variables": {  },
   "resources": [  ],
    "outputs": {  }
}

Template functions

  • Numeric
  • String
  • Array
  • Deployment values
  • Resources

Functions, parameters and variables can be combined to produce powerful reusable templates

Note - the diffence between classic deployments and ARM deployments is the existence of the cloud service container in classic. All resources are bound to the cloud service and resource group allocation is handled by the platform.

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7 years ago in #technology by
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