Deployment creation fails even if version is provided

[mlliarm]

Tried creating a deployment from the example given in the ecctl deployment create --help, and even if I provide a version it fails.

Readiness Checklist

• I am running the latest version
• I checked the documentation and found no answer
• I checked to make sure that this issue has not already been filed
• I am reporting the issue to the correct repository (for multi-repository projects)

Expected Behavior

I'd expect creation to succeed and not fail.

Current Behavior

When running:

$ ecctl deployment create --name my-deployment --deployment-template=aws-io-optimized-v2 --region=us-east-1 --version "9.3.1"

I'm getting the error:

The deployment creation returned with an error. Use the displayed request ID to recreate the deployment resources
Request ID: f9g593c0p81o4ay5766uvb219r65snctoltcyvbfokc4spc5plh9xmlvou47vgdl
api error: 7 errors occurred:
        * deployments.elasticsearch_using_legacy_dt: The referenced deployment template in elasticsearch plan [aws-io-optimized-v2] is no longer available.
        * deployments.topology_element_using_legacy_ic: The referenced instance configuration [aws.coordinating.m5d] in topology element [coordinating] is no longer available.
        * deployments.topology_element_using_legacy_ic: The referenced instance configuration [aws.data.highio.i3] in topology element [hot_content] is no longer available.
        * deployments.topology_element_using_legacy_ic: The referenced instance configuration [aws.data.highstorage.d3] in topology element [cold] is no longer available.
        * deployments.topology_element_using_legacy_ic: The referenced instance configuration [aws.data.highstorage.d3] in topology element [warm] is no longer available.
        * deployments.topology_element_using_legacy_ic: The referenced instance configuration [aws.master.r5d] in topology element [master] is no longer available.
        * deployments.topology_element_using_legacy_ic: The referenced instance configuration [aws.ml.m5d] in topology element [ml] is no longer available.

Steps to Reproduce

1. Run command ecctl deployment create --name my-deployment --deployment-template=aws-io-optimized-v2 --region=us-east-1 --version "9.3.1"
2. See error.

Possible Solution

Seems the default template aws-io-optimized-v2 isn't correct or available anymore.

Same goes for the other 7 errors.

I'm thinking they should be replaced with defaults that exist.

Context

I'm testing how I can create an ECH deployment fast using ecctl.

Your Environment

• Version used: latest version:

$ ecctl version
Version:               
Client API Version:    3.8.0
Go version:            go1.26.1
Git commit:            
Built:                 
OS/Arch:               linux / amd64

• Running against Elastic Cloud SaaS or Elastic Cloud Enterprise and version: ECH
• Environment name and version (e.g. Go 1.9): Go 1.26.1
• Server type and version: Linux 6.1.0-43-amd64 SMP PREEMPT_DYNAMIC Debian 6.1.162-1 (2026-02-08) x86_64 GNU/Linux
• Operating System and version: Debian 12

[gigerdo]

ecctl currently contains hardcoded template references that would have to be updated as new templates and hardware profiles are being introduced. Instead ecctl should use the API to get the currently recommended default template.

[mlliarm]

Closing because it's fixed with #759.