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Creating the AMI with Pre-Requisites

Follow these steps to create an AMI with pre-requisites:

1. Install Packer

  • Refer to the Packer Installation Guide.
  • For Amazon Linux 2023 (AWS CloudShell): 
    sudo yum install -y yum-utils
sudo yum-config-manager --add-repo https://rpm.releases.hashicorp.com/AmazonLinux/hashicorp.repo
sudo yum -y install packer

2. Install the Amazon Plugin for Packer

  1. Create a Packer Configuration File: Create a file named packer-config.pkr.hcl with the following content:

    packer {
  required_plugins {
    amazon = {
      version = ">= 1.3.3"
      source  = "github.com/hashicorp/amazon"
    }
  }
}

  2. Run Packer Initialization: Use the following command to download and install the Amazon plugin:

    packer init packer-config.pkr.hcl

3. Export AWS Credentials

Set your AWS credentials and region as environment variables:

export AWS_ACCESS_KEY_ID="your_Access_Key"
export AWS_SECRET_ACCESS_KEY="your_Secret_Key"
export AWS_DEFAULT_REGION="Your_Region"

4. Clone the Repository

Clone the required repository to your local machine or AWS CloudShell.

5. Grant Permissions for Target Account

  • Ensure the target account number is added in the Admin Account-ECR with permissions to access image builds.

6. Create an IAM Role for ECR and EC2 Actions

  1. Create a Role:

    • Create a role and attach a policy permitting ECR and EC2 actions.

  2. Update the packer-rg.json File:

    • Replace the placeholder <your_rolename> in the "iam_instance_profile" field under the builders section with your role name.

7. Build the AMI

Run the following command to build the AMI:

packer build -var 'awsRegion=your_region' -var 'vpcId=your_VPCID' -var 'subnetId=your_SubnetID' packer-rg.json

Runtime Variables:

  • Pass the following variables at runtime:
    • VPCID
    • SubnetID
    • AWSRegion

8. Retrieve the AMI ID

After the build completes successfully, note the AMI ID from the output.

Notes

  • Ensure all variables and IAM roles are correctly configured before running the build.
  • For further details, refer to the repository documentation or Packer's official documentation.