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fix: use aws eks get-token for kubectl auth #1590

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schollii wants to merge 5 commits into from
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fix: use aws eks get-token for kubectl auth #1590

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7785562
use aws eks get-token instead of aws authenticator
Sep 17, 2021
7a27249
default to null kubectl auth command
Oct 12, 2021
5c1411b
clarify variable description and re-order auth command default args f…
Oct 12, 2021
438eacd
Merge branch 'master' into use_aws_eks_token_instead_of_authenticator
schollii Oct 12, 2021
0a4a966
Merge branch 'master' into use_aws_eks_token_instead_of_authenticator
antonbabenko Oct 26, 2021
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13 changes: 12 additions & 1 deletion locals.tf
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Original file line number Diff line number Diff line change
@@ -1,3 +1,5 @@
data "aws_region" "current" {}

locals {

# EKS Cluster
Expand Down Expand Up @@ -160,12 +162,21 @@ locals {
"t2.xlarge"
]

default_kubeconfig_aws_auth_args = [
"--region",
data.aws_region.current.name,
"eks",
"get-token",
"--cluster-name",
var.cluster_name
]

kubeconfig = var.create_eks ? templatefile("${path.module}/templates/kubeconfig.tpl", {
kubeconfig_name = coalesce(var.kubeconfig_name, "eks_${var.cluster_name}")
endpoint = local.cluster_endpoint
cluster_auth_base64 = local.cluster_auth_base64
aws_authenticator_command = var.kubeconfig_aws_authenticator_command
aws_authenticator_command_args = coalescelist(var.kubeconfig_aws_authenticator_command_args, ["token", "-i", local.cluster_name])
aws_authenticator_command_args = coalescelist(var.kubeconfig_aws_authenticator_command_args, local.default_kubeconfig_aws_auth_args)
aws_authenticator_additional_args = var.kubeconfig_aws_authenticator_additional_args
aws_authenticator_env_variables = var.kubeconfig_aws_authenticator_env_variables
}) : ""
Expand Down
2 changes: 1 addition & 1 deletion variables.tf
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Expand Up @@ -219,7 +219,7 @@ variable "kubeconfig_aws_authenticator_env_variables" {
variable "kubeconfig_name" {

@lisfo4ka lisfo4ka Oct 12, 2021

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would you update kubeconfig_aws_authenticator_command default value as well?

@schollii schollii Oct 12, 2021

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Fixed

description = "Override the default name used for items kubeconfig."
type = string
default = ""
default = null

@lisfo4ka lisfo4ka Oct 12, 2021

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Could you clarify, please, why is it required?

@daroga0002 daroga0002 Oct 12, 2021

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probably because:

> coalescelist([""], ["c", "d"])
[
  "",
]
>

from line

terraform-aws-eks/locals.tf

Line 179 in 7785562

aws_authenticator_command_args = coalescelist(var.kubeconfig_aws_authenticator_command_args, local.default_kubeconfig_aws_auth_args)

@schollii schollii Oct 12, 2021 •
edited
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actually coalesce works with both "" and null, BUT it is almost always preferable to use null than empty string to indicate "no value set".

@daroga0002 daroga0002 Oct 18, 2021

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actually coalesce works with both "" and null

yes but it will give different results (from terraform console):

> coalescelist([""], ["c", "d"])
[
  "",
]
> coalescelist([], ["c", "d"])
[
  "c",
  "d",
]

@daroga0002 daroga0002 Oct 18, 2021

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ahh, but here is just normal string

@schollii schollii Oct 19, 2021

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yes the function being discussed is coalesce not coalescelist

}

variable "cluster_create_timeout" {
Expand Down
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