docs: week 2 docs

week-2/opdracht-2/README.md

@@ -0,0 +1,111 @@
+# Terraform Deployment – Week 2 Assignment
+
+This repository contains Terraform configurations for provisioning infrastructure on ESXi and Azure.
+
+All sensitive information (e.g. SSH key files, passwords) and custom values are handled using Terraform variables stored in a separate file.
+
+```mermaid
+graph TD
+  subgraph ESXi omgeving
+    ESXiNIC[NIC]:::existing
+    ESXivSwitch[vSwitch]
+    Portgroup[Portgroup]
+    ESXivSwitch --> ESXiNIC
+    ESXiNIC --> Portgroup
+
+    Web1[Webserver 1]
+    Web2[Webserver 2]
+    DB[Databaseserver]
+
+
+
+    Portgroup --> Web1
+    Portgroup --> Web2
+    Portgroup --> DB
+  end
+
+  subgraph Azure
+    VNet[Virtual Network]
+    Subnet[Subnet]
+    NIC[NIC]
+    NSG["NSG (SSH open)"]
+    VM[Linux VM]
+    PIP[Public IP]
+
+    VNet --> Subnet
+    Subnet --> NIC
+    NIC --> VM
+    NSG --> NIC
+    VM --> PIP
+  end
+
+  subgraph Data
+    AzurePublicKey["SSH Public Key (azure.pub)"]
+    AzurePrivateKey["SSH Private Key (azure)"]
+    SkylabPublicKey["SSH Public Key (skylab.pub)"]
+    Userdata[Userdata]
+    AzureCloudInit[Azure Cloudinit]
+    VMinfo["Output file: vm_info.txt"]
+  end
+
+  SkylabPublicKey --> Userdata
+  AzurePrivateKey --> Userdata
+  AzurePublicKey --> AzureCloudInit
+  Userdata --> Web1
+  Userdata --> Web2
+  Userdata --> DB
+  AzureCloudInit --> VM
+
+  Web1 --> VMinfo
+  Web2 --> VMinfo
+  DB --> VMinfo
+  VM --> VMinfo
+
+  classDef existing stroke:#268b26
+```
+
+## Azure
+
+- Complete network setup:
+    - Virtual Network
+    - Subnet
+    - Network Security Group
+    - NIC
+- One Ubuntu 24.04 VM.
+- VM type: `Standard_B2ats_v2`
+- Public IP address enabled
+- The `iac` user is created using cloud-init
+    - `azure.pub` is uploaded as public key.
+- A file `/home/iac/hello.txt` containing `Hello World` is created using cloud-init
+- VM public and private IP address is stored in the `vm_info.txt` file.
+
+## ESXi
+
+- Creates three Ubuntu 24.04 VMs. 
+    - 2 `webserver`
+    - 1 `databaseserver`
+- Each VM is provisioned with 1 vCPU and 2 GB RAM.
+- The `skylab` user is created using cloud-init
+    - `skylab.pub` is uploaded as public key.
+    - `azure` private key us uploaded to access the Azure VM.
+    - A SSH config file is created with info for connecting to the Azure VM.
+    - sudo access.
+    - no password prompt.
+- The packages `wget` and `ntpdate` are installed with cloud-init.
+- VM private IP addresses are stored in the `vm_info.txt` file.
+
+## Demo
+
+![demo](iac-week-2.gif)
+
+This demo shows:
+
+1. Applying the Terraform plan
+    - `terraform apply --auto-approve`
+    - This shows the ip addresses of the VM's in the output.
+2. Opening an SSH session to one of the ESXi VMs
+    - `ssh -i /home/student/.ssh/skylab skylab@192.168.1.115`
+3. Opening an SSH session to one of the Azure VMs
+    - `ssh azurevm` (using SSH config file)
+4. Showing the content of the `hello.txt` file.
+    - `cat hello.txt`