echostream-terrafy 0.0.9

Takes an existing EchoStream Tenant and creates a Terraform script and statefile for it

echostream-terrafy

EchoStream provides a graphical way to design, build and update processing an integration networks in real time.

However, there are teams that wish to manage all resources (EchoStream and others, such as Azure or AWS) in Infrastructure as Code (IaC). If you have designed a large network of processing resource in EchoStream, the ideal solution would be to introspect and extract those resources into Terraform scripts.

echostream-terrafy is the tool that does this, creating:

• A set of Terraform scripts in HCL JSON format that exactly matches the current state of your Tenant. These may be used as-is or may be converted into a module for use in a larger Terraform script.
• A terraform.tfstate file that has all of the resources in the Terraform scripts imported.

Installation

echostream-terrafy is a Python package that provides an executable. To install it:

1. Install Python >= 3.9 for your device.
2. Install Terraform >= 1.3.5 for your device.

   Warning - if you do not install Terraform to a location in your PATH, make note of the installation location!

3. Create a Python virtual environment for the echostream-terrafy installation. This is an optional step, but it prevents Python package mismatch issues and is best practice.

   python -m venv echostream-terrafy
   

4. Activate the virtual environment and install echostream-terrafy into it.

   source echostream-terrafy/bin/activate
   pip install echostream-terrafy
   

   Note - to deactivate the virtual environment, simply type deactivate at the command prompt.

Usage

In your EchoStream Tenant, create an ApiUser with the admin role.

Make note of the following in your ApiUser's credentials:

• GraphQL Appsync Endpoint
• Client Id
• Username
• Password
• User Pool Id

You may execute echostream-terrafy using either environment variables, command-line parameters, or a combination of both. If a parameter is present in both the environment and on the command line, the command line takes precedence.

All output from echostream-terrafy executions will be written to the current working directory, with existing files (including the terraform.tfstate file) being overwritten.

Note - it is recommended that you create a directory for the output of echostream-terrafy and execute it within that directory.

Warning - if you did not install terraform into your PATH, you must let echostream-terrafy know where to find it. This may be accomplished by specifying the --terraform command-line parameter with the full path to the terraform executable.

Warning - while the EchoStream Terraform Provider will run in a non-POSIX environment (e.g. - Windows), echostream-terrafy will NOT generate correct paths in a non-POSIX environment. Path construction is OS dependent. Because of this, echostream-terrafy will not run in a non-POSIX envrionment.

Executing with environment variables

source echostream-terrafy/bin/activate
export ECHOSTREAM_APPSYNC_ENDPOINT=<api_user_appsync_endpoint>
export ECHOSTREAM_CLIENT_ID=<api_user_client_id>
export ECHOSTREAM_PASSWORD=<api_user_password>
export ECHOSTREAM_TENANT=<my_tenant_name>
export ECHOSTREAM_USER_POOL_ID=<api_user_user_pool_id>
export ECHOSTREAM_USERNAME=<api_user_username>
echostream-terrafy
deactivate

Executing using command-line variables

source echostream-terrafy/bin/activate
echostream-terrafy \
    --appsync-endpoint <api_user_appsync_endpoint> \
    --client-id <api_user_client_id> \
    --password <api_user_password> \
    --tenant <my_tenant_name> \
    --user-pool-id <api_user_user_pool_id> \
    --username <api_user_username>
deactivate

Output

echostream-terrafy will generate the following files.

Filename	Content
artifacts	Directory of Python code, config JSON and readme artifacts for resources
api-users.tf.json	The ApiUser resources
apps.tf.json	The App resources
functions.tf.json	The Function data sources and resources
kms-keys.tf.json	The KmsKey resources (except the Tenant default KmsKey)
main.tf.json	The terraform block
managed-node-types.tf.json	The ManagedNodeType data sources and resources
message-types.tf.json	The MessageType data sources and resources
nodes.tf.json	The Node data sources and resources
provider.tf.json	The provider block
tenant-users.tf.json	The TenantUser resources
tenant.json	The Tenant resource
terraform.tfstate	The current state, imported

Using the output as-is

You may use the output from echostream-terrafy as-is to manage your Tenant.

Simply make any changes that you wish to it and run terraform plan or terraform apply.

Warning - rerunning echostream-terrafy after you have made manual changes will result in those changes being overwritten!

Using the output as a Terraform module

1. Copy all of the .tf.json files and the artifacts directory to another folder.
2. Remove provider.tf.json. The provider should be passed in by the module caller.
3. Add a variables.tf file and variablize any input (e.g. - configs) that you wish to be modifiable by module users.
4. Add an outputs.tf file and output any information that needs to be accessed by module users.
5. Register the module with a public/private Terraform registry or include it in a modules directory (either directly or as a git submodule) in another Terraform project.

Upload the output to Terraform Cloud or Terraform Enterprise

Please see Terraform Cloud/Enterprise documentation for how to migrate a local terraform workspace to those products.