terraform-provider-aws
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[Bug]: aws_eks_addon fails creation with `resolve_conflicts = "PRESERVE"`
Terraform Core Version
1.3.2
AWS Provider Version
4.36.1
Affected Resource(s)
- aws_eks_addon
Expected Behavior
Setting resolve_conflicts = "PRESERVE"
should be supported in all cases.
Actual Behavior
Addon creation fails when applying this resource to new empty EKS cluster.
Relevant Error/Panic Output Snippet
╷
│ Error: error creating EKS Add-On (poc-01-cluster:vpc-cni): InvalidParameterException: Resolve conflicts option PRESERVE is not supported for operation CreateAddon
│ {
│ RespMetadata: {
│ StatusCode: 400,
│ RequestID: "2ec20228-70d6-4f9f-9c89-91115ebb3431"
│ },
│ AddonName: "vpc-cni",
│ ClusterName: "poc-01-cluster",
│ Message_: "Resolve conflicts option PRESERVE is not supported for operation CreateAddon"
│ }
│
│ with aws_eks_addon.vpc_cni,
│ on eks_addons.tf line 1, in resource "aws_eks_addon" "vpc_cni":
│ 1: resource "aws_eks_addon" "vpc_cni" {
│
╵
Terraform Configuration Files
resource "aws_eks_addon" "vpc_cni" {
cluster_name = module.eks.eks_cluster_id
addon_name = "vpc-cni"
addon_version = "v1.11.4-eksbuild.1"
resolve_conflicts = "PRESERVE" # keep manual changes to daemonset env vars
service_account_role_arn = module.vpc_cni_eks_iam_role.service_account_role_arn
}
Steps to Reproduce
Create EKS cluster using aws_eks_cluster
and add aws_eks_addon
to it.
Debug Output
No response
Panic Output
No response
Important Factoids
According to AWS EKS API, both CreateAddon and UpdateAddon consider OVERWRITE | NONE | PRESERVE
as valid string for resolveConflicts
. But CreateAddon doesn't actually allow it.
Preserve – Not supported. You can set this value when updating an add-on though. For more information, see UpdateAddon.
References
https://docs.aws.amazon.com/eks/latest/APIReference/API_CreateAddon.html#API_CreateAddon_RequestBody https://docs.aws.amazon.com/eks/latest/APIReference/API_UpdateAddon.html#API_UpdateAddon_RequestBody
Would you like to implement a fix?
No
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@z0rc - as your links to the documentation point out, the AWS EKS CreateAddon
API doesn't support PRESERVE
. Presumably, then, your original 'Expected Behaviour' of supporting that option in all cases isn't actually what you want - we obviously can't make the API support something it doesn't :smile: We can, though, try to improve the validation on the Terraform provider side so that it also rejects "PRESERVE" - that way you'll get quicker feedback that what you've asked for isn't possible.
@mattburgess my use case is to have terraform code that can be applied always. I need PRESERVE
to keep manual changes to EKS addon. Also I need to be able to apply terraform code when creating new cluster and addons or updating existing cluster and addons. With your proposal I need to set different resolve_conflicts
depending whether addon is being created first time or updated afterwards, which contradicts terraform design philosophy.
The way I see this situation can solved is by extending resolve_conflicts
to handle validation and actual apply behavior depending on whether it's first time creation or update to existing addon, something like
resolve_conflicts {
on_create = "OVERWRITE"
on_update = "PRESERVE"
}
@z0rc it's taken a while but I might be able to pick this up.
I like your proposal, except that changing resolve_conflicts
as you've suggested would be a breaking change (because of the change from a plain string type to a map type) which is probably best avoided. Instead, we could look at deprecating use of resolve_conflicts
and have the behaviour controlled by 2 new attributes, resolve_conflicts_on_create
and resolve_conflicts_on_update
. resolve_conflicts_on_create
would only be allowed to take on the values of NONE
and OVERWRITE
, whereas resolve_conflicts_on_update
would take all 3 values.
Closed by #29555, merged to main
via #31392
This functionality has been released in v5.0.0 of the Terraform AWS Provider. Please see the Terraform documentation on provider versioning or reach out if you need any assistance upgrading.
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