README.md

Daily EC2 AMI Backup by lambda

This project using Terraform to help you deploy a AWS Lambda function with IAM Role and Cloudwatch Event.

If your EC2 has a tag key Backup and value by_lambda, then it'll be backup AMI by lambda.

EC2 Tag Example

Updated

• 2019-06-24
  • Delete old AMIs, if existing AMIs are exceeded reserved count. (default = 5)
  • Bugfix - Environment variables injection didn't work properly.
• 2019-06-20
  • KMS lambda target arn is loaded automatically.
  • Bugfix

Prerequisites

• terraform installed (version >= 0.12.1)
• python3 (version >= 3.7) (if you want to test on your local)

Deployment guide

# Archive your python code.
$ ./build.py


$ cd terraform/lambda_ami_backup

$ terraform plan
$ terraform apply 

Configuration

Default aws region can be modified on terraform/labmda_ami_backup/local.tf.

locals {
  module_dir      = "../../modules"
  aws = {
    region        = "ap-northeast-2"
  }
}

If you want to customize, see terraform/lambda_ami_backup/variables.tf file.

variable "ec2_tag_key_env_var" {
    description = "The EC2's tag key that lambda looking up."
    default = "Backup"
}   

variable "ec2_tag_value_env_var" {
    description = "The EC2's tag value that lambda looking up."
    default = "by_lambda"
}

variable "schedule_exp" {
    description = "The cloudwatch event schedule expression."
    default = "cron(0 18 * * ? *)"
}

variable "max_images" {
    description = "The maximun count of backup images"
    default = 5
}