[Enhancement]: Support TransitEncryptionMode argument for ElastiCache clusters

[subbotinkv]

Description

Not so long ago, AWS announced ability to enable in-transit encryption for existing ElastiCache clusters. This feature is already available in AWS Console & AWS CLI.
It would be nice to have in terraform also. It will help to make process of migration to TLS enabled cluster more smooth.

Affected Resource(s) and/or Data Source(s)

• aws_elasticache_replication_group

Potential Terraform Configuration

{
   transit_encryption_enabled = true
   transit_encryption_mode = preferred
}

References

• Amazon ElastiCache for Redis now supports enabling encryption in transit on existing clusters
• Enabling in-transit encryption for an existing cluster using the (CLI)
  
• Options: --transit-encryption-mode

Would you like to implement a fix?

No

[github-actions]

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[dbmurphy]

PR #26987 is addressing this, isn't it? We are just waiting for it to be prioritised and merged. Maybe in milestone 5.0, we will finally see this.

[github-actions]

This functionality has been released in v5.16.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!

[github-actions]

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