Steps to create an Instance using terraform

Step 1: Initiate a Resource Plan

Open the code editor in OCI and create a file within a folder named 'terraform'.

and then create a file named import.tf

Write below command in import file.

import { id = "ocid1.instance.oc1.iad.anuwcljtgnxa3myc3d6ixwoyfzihsxkzwf6gghvblcwfb3rvggwyzxsk2n4a" to = oci_core_instance.testinstance }

Now, Right click on import.tf file and select open in integrated terminal

Run

terraform init

command to initialize Terraform configuration file.

As we can see Terraform is initialized now

Now, Run command

terraform plan --generate-config-out=generated.tf

to creates an execution plan and it saves the resulting configuration of the plan into a new file called generated.tf.

As we can see A new file named generated.tf is created with execution plan

Now we place # before the import.tf command in the code editor,

it becomes a comment. This effectively hides the command from being executed.

Create a file with a name that matches the instance you want to execute. Here I am created file named testinstance.tf

Here testinstance.tf file is created

and now we will copy paste the execution plan in testinstance.tf file from generated.tf file

and after copy paste the execution plan, we place # before every line in the generated.tf file it becomes a comment. This effectively hides the command from being executed.

Now Run

terraform plan 

command to provides a clear and detailed execution plan and ensures that you have a clear understanding of the changes before they are made, reducing the risk of errors and unintended consequences.

Step 2 : Create an Instance

Once we review all the details and make any necessary changes, we proceed by running the command

terraform apply

Now, enter Yes to confirm and apply the plan.

**Occasionally, ** we encounter errors during this process. Let's address and resolve these errors.

• Error 1 : shapeconfig.nvmes

Solution : Place # before nvmes in the testinstance.tf file

• Error 2 : Hostname

Solution : Place # before hostname in the testinstance.tf file

• Error 3 : Boot volume size

Solution : Increase the size of boot volume from 47 gb to 50 gb in testinstance.tf file

• Error 4 : PV encryption in transit enabled

Solution : Place # before PV encryption in transit enabled in the testinstance.tf file

• Error 5 : Private IP

Solution : Place # before Private IP in the testinstance.tf file

Again Run

terraform apply

command and enter "Yes"

Instance is created now.

We can see in OCI console also, Testinstance is created.

Step 3 : Terminate an Instance

Run

terraform destroy

command to terminate the Instance from backend using terraform

Enter 'Yes' to initiate

Instance is destroyed

testinstance is Terminated As we can see in console as well