Can't enable automatic snapshotting on aws_elasticache_replication_group

[Alars-ALIT]

Seems impossible to enable automatic snapshotting on a aws_elasticache_replication_group.

Terraform Version

0.7.13

Terraform Configuration Files

resource "aws_elasticache_replication_group" "replication-group" {
  replication_group_id                = "${var.environment}-rep-group"
  replication_group_description = "${var.environment}-redis"
  node_type                                = "cache.m1.small"
  number_cache_clusters            = 2
  port                                          = 6379
  parameter_group_name          = "default.redis3.2"
  automatic_failover_enabled    = "${var.settings["automatic_failover_enabled"]}"
  security_group_ids                  = ["${aws_security_group.redis.id}"]
  subnet_group_name               = "${aws_elasticache_subnet_group.subgroup.name}"

  snapshot_window               = "05:00-09:00"  
  snapshot_retention_limit      = 3
}

Debug Output

Error applying plan:

1 error(s) occurred:

• aws_elasticache_replication_group.replication-group: Error updating Elasticache replication group: InvalidParameterCombination: Must specify both SnapshotRetentionLimit and SnapshottingClusterId to turn on snapshots
  status code: 400, request id: 25af6fe7-bc87-11e6-9afb-dd75999c5340

Expected Behavior

Snapshots should be enabled

Steps to Reproduce

terraform apply

[stack72]

Hi @Alars-ALIT

Sorry for the issue here. From the error message I am assuming things go down as follows:

• Create your terraform controlled replication_group without snapshotting
• update the config to include snapshotting
• Terraform apply then throws that error message?

This correct?

I am trying to recreate this right now and am struggling to do so. Any help would be great

Paul

[stack72]

Replicated it :)

[stacko@Pauls-MacBook-Pro:~/Code/terraform-org/terraform-recreations/10581]
% terraform apply
aws_elasticache_replication_group.replication-group: Refreshing state... (ID: test-rep-group)
aws_elasticache_replication_group.replication-group: Modifying...
  snapshot_retention_limit: "0" => "5"
  snapshot_window:          "07:00-08:00" => "05:00-09:00"
Error applying plan:

1 error(s) occurred:

* aws_elasticache_replication_group.replication-group: Error updating Elasticache replication group: InvalidParameterCombination: Must specify both SnapshotRetentionLimit and SnapshottingClusterId to turn on snapshots
	status code: 400, request id: f0e91fc6-bd4d-11e6-ad10-e779b4597a1e

Terraform does not automatically rollback in the face of errors.
Instead, your Terraform state file has been partially updated with
any resources that successfully completed. Please address the error
above and apply again to incrementally change your infrastructure.

[ghost]

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