A Technical I.T./DevOps Blog
Problem scenario
You have heard about user data in AWS, Azure, or Terraform. What is it? What does user data include?
AWS User Data versus Terraform User Data
Answer for AWS
Generally it is a customization that the account owner configured to apply to an EC-2 instance when it first launches. It is either a shell script or a cloud-init directive that is used when an EC-2 instance is launched (according to Amazon’s website).
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Continue reading “What is User Data in AWS, Azure, or Terraform?”
Problem scenario
You want to write a Terraform module in AWS. What do you do?
Solution
You will use the keyword “module” in a .tf file, and you will use either “terraform init” or “terraform get” to install the module. The directions below were adapted from https://www.howtoforge.com/how-to-create-a-terraform-module/.
Prerequisite
You need to have Terraform installed;
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Continue reading “How Do You Write a Terraform Module in AWS?”
Problem scenario
You want to use Terraform and Kubernetes (in EKS). How do you do this in a simple way to test it out?
Solution
Prerequisite
This assumes you have deployed EKS. If you need assistance, see this posting.
This assumes you have installed Terraform. If you need assistance, see this posting.
Procedures
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Continue reading “How Do You Use Terraform and Kubernetes in a Simple Way (as a Proof of Concept)?”
Updated on 6/4/22 to include possible solutions 2 through 4.
Problem scenario
You are running a terraform command, but you receive this error:
Initializing modules…
– website_contint_bucket in
Error: Unreadable module directory
Unable to evaluate directory symlink: lstat foobar: no such file or directory
Error: Failed to read module directory
Module directory does not exist or cannot be read.
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Problem scenario
You want the dot utility to transform “terraform graph” command output to usable files. What should you do?
Solution
Run this command: sudo yum -y install graphviz
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Continue reading “How Do You Install the dot Utility on a CentOS/RHEL/Fedora Server?”
Problem scenario
You try to run terraform apply to create an Azure VM but you receive a message like this:
Error: Error applying plan:
1 error(s) occurred:
* azurerm_virtual_machine.myterraformvm: 1 error(s) occurred:
* azurerm_virtual_machine.myterraformvm: compute.VirtualMachinesClient#CreateOrUpdate: Failure sending request: StatusCo” Message=”Authentication using either SSH or by user name and password must be enabled in Linux profile.” Target=”linux”
What should you do?
Solution
1.
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Problem scenario
You want to use infrastructure as a code with Terraform and GCP. How do you use a .tf file to create a virtual machine in Google Cloud Platform?
Solution
Prerequisite
This assumes you have installed Terraform. If you need assistance with this, see this posting.
Procedures
1.
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Continue reading “How Do You Use Terraform to Create a Server in GCP?”
Problem scenario
You want to use Terraform to create a virtual machine in Azure. What do you do?
Solution
Prerequisites
i. Terraform must be installed on a Linux server. If you need assistance with this, see this posting.
ii. The Azure CLI must be installed and configured on the Linux server. If you need assistance with this,
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Continue reading “How Do You Create a Server in Azure with Terraform?”
Problem scenario
You want to use Terraform to deploy EC-2 instances (VMs in AWS). How do you do this?
Solution
These directions can work on a Linux server in your enterprise, a Linux server in Azure or a Linux server in AWS.
1. Install Terraform. See this link if you do not know how.
2. Create a file like this called contint.tf with this as the content:
provider “aws” {
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Continue reading “How Do You Use Terraform to Create AWS Servers?”