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"Learn Terraform (and AWS) by Building a Dev Environment – Full Course for Beginners" is a two-hour video that demonstrates how to use Terraform, VS Code, and AWS to set up a remote development environment in AWS EC2. By following the instructions in the video, users can learn how to create a VPC, Internet Gateway, security group, public subnet, EC2 instance, and key pair in AWS using Terraform. The video covers essential Terraform tools and functions, such as Terraform state format, console variables, conditionals, file, and template file usage. Additionally, the instructor highlights the importance of keeping the environment small and scaling it up as needed.
In this section, viewers are introduced to a two-hour project centered around TerraForm where they will use VS code to deploy an AWS EC2 instance along with the VPC, Internet Gateway security groups, and more that will serve as a remote development environment. By utilizing several TerraForm tools and functions such as TerraForm state format, replace console variables, conditionals, file, template file, and more, viewers will have the skills necessary to dive deeper into TerraForm and add this extremely in-demand skill to their resumes. The course covers how to create a new user in AWS and how to get credentials installed in order to connect to AWS.
In this section, the instructor walks through the process of setting up a development environment using VS Code, Terraform, and AWS. After setting up the necessary credentials and extensions, the instructor creates a working directory and explains how to build out a VPC, Internet Gateway, public route table, security group, public subnet, and EC2 instance in AWS to form the developer environment. Once the files are processed, the VS code terminal will have access to the EC2 node for remote SSH session access. The instructor stresses the importance of keeping the environment small and building it out as needed.
In this section of the video, the instructor guides beginners through the creation of a VPC using TerraForm by creating a new file named main.tf and specifying a resource with a name for the VPC called "main" and a cider block. The instructor also explains the usage of VPC options, which can be specified in the argument reference in the AWS documentation. Additionally, the instructor shows the usage of TerraForm init, which initializes the configuration and connects it to AWS, and is important to use the same version of the provider every time the code is executed to avoid issues with upgrades.
In this section, the instructor shows how to create a VPC resource in Terraform. The instructor creates a VPC resource and enables DNS host names and DNS support while adding the resource name as a tag. The Terraform plan shows all of the pieces that will be created and confirmed with "yes" using Terraform apply. The resource successfully creates in the AWS pane, and the instructor goes through the Terraform state documentation.
In this section, the instructor discusses how to view the information on the AWS API and terraform.tf state file, which is pulled directly from the API. They show how to use command line tools to access the state, including Terraform state list and Terraform state show, which can be used to manipulate and output the state as JSON for further manipulation. They caution about not manually traversing tf state, as it is usually stored offsite, and mention the importance of state as the most critical feature in Terraform. The instructor demonstrates how to use the command "Terraform destroy" to remove anything that has been created, and then how to restore it using "Terraform apply". Finally, the instructor discusses the deployment of a subnet for future EC2 instances.
In this section, the instructor teaches how to add another resource to AWS VPC, which is AWS_subnet. This resource is added under the VPC, and a VPC ID is provided to access this resource. The instructor adds a cider block and the map, public IP on launch = true. Next, an availability zone is added that will be used in two ways. The students are taught to use data sources to ensure the availability zone is always correct, especially when multiple availability zones are in use. Tags are added to name as "Dev" public, so that we can label it correctly and avoid accidentally putting sensitive resources. The section ends with successfully adding the subnet through TerraForm planning and applying, and verifying the subnet creation in the AWS console.
In this section, the video instructor walks through the process of adding an AWS Internet Gateway to the VPC and introducing a new command "TerraForm FMT" that can correct inconsistencies in formatting. After successfully adding the Internet Gateway, the next step is to create a new route table to route traffic from the subnet to the Internet Gateway. Instead of defining routes in-line, the instructor demonstrates using a route resource that is straightforward and needs only the VPC ID. The resource AWS route specifies a route table ID, destination cider block, and Internet Gateway to create a default route for all traffic to get to the internet.
In this section, the instructor explains how to create a route table and a route in Terraform for an AWS environment. They provide examples of how to specify the ID for the route table and destination cider block for the route, using AWS Internet Gateway. The instructor then demonstrates how to create a route table association, associating the subnet ID with the route table ID, to bridge the gap between the two. Finally, the instructor discusses the importance of adding a security group to the deployment and provides examples from the AWS documentation of how to define ingress and egress rules.
In this section, the instructor explains how to set up a security group for your Terraform project. They demonstrate how to create a resource for the AWS security group and specify the ingress and egress rules that it should allow. The instructor emphasizes the importance of hardcoding your own IP address to ensure that no one else can compromise your instance, and they show how to use lists in Terraform to specify multiple CIDER blocks. Finally, they run a Terraform plan and apply to ensure everything works as expected.
In this section, the instructor explains how to use a data source in Terraform to query the AWS API for an AMI ID to provide a base image for the EC2 instance. They show how to get the owner ID in the AWS management console and then create a new file called "data-sources.tf" to provide the necessary AMI filters and owners, including the "most recent" filter. Finally, they run the "terraform apply" command to deploy the EC2 instance.
In this section, the instructor demonstrates how to create a key pair in AWS and use it to create a Terraform resource that can be used by the EC2 instance resource to SSH into it later. The instructor shows how to use the Terraform function file to specify the path to the key instead of copying and pasting the public key from the file. The AWS key pair resource is created using the key name provided and the public key path specified. The instructor also shows how to verify that the key pair has been created in the AWS resources and finally deploy the EC2 instance using Terraform.
In this section, the instructor walks through the process of setting up an AWS instance using Terraform. The process involves providing an instance type, AMI, tags, key name, security group, subnet ID, and root block device. The instructor also explains how to resize the default size of the drive for the instance and how to run a Terraform plan to check if everything looks good before applying it. However, the instructor advises not to apply it yet since in the next lesson, they will add user data to the instance to bootstrap it and install the Docker engine.
In this section, the instructor cleans up the AWS instance, reorganizing arguments, tags block, and the root device block to look more streamlined. Next, the instructor creates a user data file, pastes the provided script to update apt and install dependencies; in addition, permits running Docker commands as the Ubuntu user. The tutorial shows how to add user data to resources in the main.tf file by extracting the contents from the user data file. The next step involves running Terraform plan which shows the EC2 instance hash of the user data, need for redeployment if any changes occur. Terraform apply, SSHing into the instance follows, and running a Docker version command verifies that the instance is working correctly.
In this section, the instructor discusses configuring SSH in order to allow VS code to connect to an EC2 instance. They recommend installing the "Remote - SSH" extension and creating a file containing the IP address of the instance and the username. The instructor creates two files, one for Windows and one for Linux/Mac. They also discuss the use and limitations of provisioners, noting that they are typically a last resort and do not affect the overall success of the deployment.
In this section, the instructor explains the use of resource provisioners within AWS instances and demonstrates how to use the self object to access information about the instance, such as the private IP or public IP, using interpolation syntax. The provisioner uses a dash instead of an underscore, and the instructor details how to use the template file function to run necessary files and pass in variables. Finally, the instructor explains the use of an interpreter to tell the provisioner what to use to run scripts and provides an example for Windows users.
In this section of the "Learn Terraform (and AWS) by Building a Dev Environment" course, the instructor demonstrates how to run a Terraform plan and use the "-replace" flag to trigger the provisioning of an EC2 instance with the updated configuration file. The instructor also shows how to verify that the provisioning was successful by checking the SSH config file, connecting to the instance using a remote SSH extension, and running Docker commands in the remote terminal. The next step is to optimize the script by adding variables to make it more flexible and dynamic.
In this section, the instructor discusses how to use interpolation syntax to specify a variable that will be calculated dynamically whenever the script runs. The variable is initialized in a new file named "variables.tf" and defined with a type in curly braces. The instructor warns that adding new variables will require that they be defined each time a Terraform plan, apply, or destroy operation is run. The section concludes with a brief overview of other ways to define variables, including using environment variables and file inputs.
In this section, the video explains how to manage variables in Terraform, which are processed in a specific order. Environment variables are processed last, after variables defined in terraform.tf VARs, terraform for JSON, auto.tfvars, and auto.TF.vars, among others. Users can also use VAR and var file options on the command line to specify variable definitions. The Terraform console is also demonstrated as a tool to experiment and play with different values before deploying. The video then goes on to show how to override variables with different files and command line using a specific order of precedence.
In this section, the video tutorial covers using conditional expressions to choose the interpreter that needs to be used dynamically based on the definition of the host OS variable. The interpreter determines the interpreter that is used to interpret the SSH config script. The Terraform console is used to pass a variable definition to define the host OS. The conditional expressions are used to provide value and check for equality using PowerShell and bash. The hosts that are not Windows use bash. Once the Terraform is applied, it is possible to SSH into the new IP address and connect to the new instance.
In this section, the instructor explains how to use Terraform outputs to retrieve information about created AWS instances without having to manually search for it. By accessing the instance's public IP address attribute using Terraform console and Terraform state show, the instructor creates an output for the IP address and shows how to use Terraform apply dash refresh only to add it to the state so that it can be accessed with Terraform output. The instructor notes that outputs are useful for automation purposes and that a lot can be done with them, and that they can be retrieved from the TF state file.
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