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README.md

Scenario 2: Create Shared Amazon EFS with Mount Target(s)

In this scenario the lifecycle of a shared Amazon EFS and mount point(s) is owned by a centralized team. It creates a shared Amazon EFS, on which one or more application teams can create their own EFS access point(s).

Prerequisites

  • Terraform backend provider and state locking providers are identified and bootstrapped.
    • A bootstrap module/example is provided that provisions Amazon S3 for Terraform state storage and Amazon DynamoDB for Terraform state locking.
  • The target VPC along with the target Subnets exist and identified via Tags.
    • A vpc example is provided that provisions VPC, Subnets and related resources with example tagging.
    • The example uses the following tags to identify the target VPC and Subnets. 
      "efs/scenario" = "1"
"Env"          = "DEV"
  • EFS file system does not exist.
  • EFS access point does not exist.
  • EFS mount points do not exist in the target VPC Subnets.
  • EFS Security Group does not exist.

Outcome

  • EFS file system is created.
  • EFS Security Group is created with default rules.
  • EFS mount points are created in the target VPC Subnets.
  • Standardized EFS resource policy is created.
  • No EFS access points are created.

This is required step for scenario3

Execution

  • cd to examples/efs/scenario2 folder.
  • Modify the backend "S3" section in provider.tf with correct values for region, bucket, dynamodb_table, and key.
    • Use provided values as guidance.
  • Modify terraform.tfvars to your requirements.
    • Use provided values as guidance.
  • Make sure you are using the correct AWS Profile that has permission to provision the target resources.
    • aws sts get-caller-identity
  • Execute terraform init to initialize Terraform.
  • Execute terraform plan and verify the changes.
  • Execute terraform apply and approve the changes to provision the resources.

Requirements

Name Version
terraform >= v1.1.9
aws >= 4.13.0

Providers

No providers.

Modules

Name Source Version
shared_efs ../../../modules/aws/efs n/a

Resources

No resources.

Inputs

Name Description Type Default Required
env_name Environment name e.g. dev, prod string n/a yes
project Project name (prefix/suffix) to be used on all the resources identification string n/a yes
region The AWS Region e.g. us-east-1 for the environment string n/a yes
subnet_tags Tags to discover target subnets in the VPC, these tags should identify one or more subnets map(string) n/a yes
tags Common and mandatory tags for the resources map(string) n/a yes
vpc_tags Tags to discover target VPC, these tags should uniquely identify a VPC map(string) n/a yes
efs_access_point_specs List of EFS Access Point Specs to be created. It can be an empty list. 
list(object({
    efs_ap          = string # unique name e.g. common_sftp
    uid             = number
    gid             = number
    secondary_gids  = list(number)
    root_path       = string # e.g. /{env}/{project}/{purpose}/{name}
    owner_uid       = number # e.g. 0
    owner_gid       = number # e.g. 0
    root_permission = string # e.g. 0755
    principal_arns  = list(string)
  }))
 [] no
efs_id EFS File System Id, if not provided a new EFS will be created string null no
kms_alias KMS Alias to discover KMS for EFS encryption, if not provided, a new CMK will be created string null no
security_group_tags Tags used to discover EFS Security Group, if not provided, new EFS security group will be created map(string) null no

Outputs

Name Description
efs Elastic File System info
efs_ap Elastic File System Access Points