- 1 Resource Group
- 1 Virtual Network
- 3 Subnets (1 for web tier, 1 for app tier and 1 for database tier)
- 2 Public Ip’s (Only for the web tier)
If you modify the number of web servers to be created in the .tfvars file, it adjusts the number of public ip’s accordingly. - 3 NSG’s ( 1 each for web, app and database tier)
This is created because each tier might different set of rulesm like web tier might be exposed over http but database and app are not The security rules are created using dynamic blocks. You can pass in as many rules in tfvars file
Web tier has rdp and http allowed
App tier has only rdp allowed
Database does not have any rules (but can be added in .tfvars, if needed)
NSGS can be attached to either Subnet or NIC. In this Environment they are attached to NIC and NIC’s in turn are associated with VM’s. - 5 NIC’s
They are grouped into web tier, app tier and database tier because of the association with respective subnet and NSG
Each tier again creates no of nics based on the servers specified for that tier - 5 VM’s
2 for web tier
2 for app tier
1 for database tier
The vm’s can be added or deleted by modifying the vms_name variable specific to the tier. The creation or deletion will be grouped i.e., the vm along with its nic and public ip (if web tier) will be created/destroyed.
This Terraform project has no authentication built in. It relies on the az-cli to authenticate
az login- Follow the steps to authenticate via browser.
- If you have multiple subscriptions or tenants you may have to chose the right one e.g.
az account set --subscription "Visual Studio Professional