Terraform

Some notes:

##### Installation of Terraform
```
# install hashicorp tap
brew tap hashicorp/tap

# install terraform
brew install hashicorp/tap/terraform

# to upgrade to the latest version
brew update
brew upgrade hashicorp/tap/terraform
```

##### Install autocomplete on zshell
```
terraform -install-autocomplete
```

##### Installing Azure Cli
```
brew update && brew install azure-cli
```

##### Azure cli setup
```
# login to azure and find all the subscriptions to which you have access.
az login

az account list

"""
[
  {
    "cloudName": "AzureCloud",
    "homeTenantId": "0envbwi39-home-Tenant-Id",
    "id": "35akss-subscription-id",
    "isDefault": true,
    "managedByTenants": [],
    "name": "Subscription-Name",
    "state": "Enabled",
    "tenantId": "0envbwi39-TenantId",
    "user": {
      "name": "your-username@domain.com",
      "type": "user"
    }
  }
]
"""
# Find the id column for the subscription account you want to use.
# Once you have chosen the account subscription ID, set the account with the Azure CLI
az account set --subscription "35akss-subscription-id"
az account set --subscription "1392852c-9a42-4a73-a639-8bf403d32008"
```

##### Terraform Commands

##### To get help with terraform
```
terraform -help

# add any subcommands to terraform -help for example:
terraform -help plan
terraform -help init
terraform -help apply
```

##### Initialize Terraform Configuration
```
terraform init
```

##### Format and validate the Configuration
```
terraform fmt
terraform validate
```

##### Plan
```
terraform plan
```

##### Apply Terraform Configuration
```
terraform apply
terraform apply -auto-approve
```

##### Inspect Terraform State
```
terraform show
```

##### Destroy resources managed by Terraform project
```
terraform destroy
```

##### Passing variables via command line
```
terraform apply -var 'resource_group_name=Some_RG_Name' -var 'vm_size=Standard_B2s'
```

Usage: terraform [global options] "subcommand" [args]

The available commands for execution are listed below.
The primary workflow commands are given first, followed by
less common or more advanced commands.

Main commands:
  init          Prepare your working directory for other commands
  validate      Check whether the configuration is valid
  plan          Show changes required by the current configuration
  apply         Create or update infrastructure
  destroy       Destroy previously-created infrastructure

All other commands:
  console       Try Terraform expressions at an interactive command prompt
  fmt           Reformat your configuration in the standard style
  force-unlock  Release a stuck lock on the current workspace
  get           Install or upgrade remote Terraform modules
  graph         Generate a Graphviz graph of the steps in an operation
  import        Associate existing infrastructure with a Terraform resource
  login         Obtain and save credentials for a remote host
  logout        Remove locally-stored credentials for a remote host
  output        Show output values from your root module
  providers     Show the providers required for this configuration
  refresh       Update the state to match remote systems
  show          Show the current state or a saved plan
  state         Advanced state management
  taint         Mark a resource instance as not fully functional
  test          Experimental support for module integration testing
  untaint       Remove the 'tainted' state from a resource instance
  version       Show the current Terraform version
  workspace     Workspace management

Global options (use these before the subcommand, if any):
  -chdir=DIR    Switch to a different working directory before executing the
                given subcommand.
  -help         Show this help output, or the help for a specified subcommand.
  -version      An alias for the "version" sub-command.