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docs: Re-add 'Tags for the ASG to support cluster-autoscaler scale up from 0' example (#2494)

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Co-authored-by: Bryant Biggs <bryantbiggs@gmail.com>
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tculp
2023-05-17 10:22:26 -04:00
committed by GitHub
parent 703a76bf89
commit fcb4256fa1
2 changed files with 50 additions and 0 deletions
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1
examples/eks_managed_node_group/README.md
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@@ -53,6 +53,7 @@ Note that this example may create resources which cost money. Run `terraform des
| Name | Type | | Name | Type |
|------|------| |------|------|
| [aws_autoscaling_group_tag.cluster_autoscaler_label_tags](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/autoscaling_group_tag) | resource |
| [aws_iam_policy.node_additional](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource | | [aws_iam_policy.node_additional](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
| [aws_security_group.remote_access](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/security_group) | resource | | [aws_security_group.remote_access](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/security_group) | resource |
| [aws_ami.eks_default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ami) | data source | | [aws_ami.eks_default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/ami) | data source |

49
examples/eks_managed_node_group/main.tf
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@@ -462,3 +462,52 @@ data "aws_ami" "eks_default_bottlerocket" {
values = ["bottlerocket-aws-k8s-${local.cluster_version}-x86_64-*"] values = ["bottlerocket-aws-k8s-${local.cluster_version}-x86_64-*"]
} }
} }
################################################################################
# Tags for the ASG to support cluster-autoscaler scale up from 0
################################################################################
locals {
# We need to lookup K8s taint effect from the AWS API value
taint_effects = {
NO_SCHEDULE = "NoSchedule"
NO_EXECUTE = "NoExecute"
PREFER_NO_SCHEDULE = "PreferNoSchedule"
}
cluster_autoscaler_label_tags = merge([
for name, group in module.eks.eks_managed_node_groups : {
for label_name, label_value in coalesce(group.node_group_labels, {}) : "${name}|label|${label_name}" => {
autoscaling_group = group.node_group_autoscaling_group_names[0],
key = "k8s.io/cluster-autoscaler/node-template/label/${label_name}",
value = label_value,
}
}
]...)
cluster_autoscaler_taint_tags = merge([
for name, group in module.eks.eks_managed_node_groups : {
for taint in coalesce(group.node_group_taints, []) : "${name}|taint|${taint.key}" => {
autoscaling_group = group.node_group_autoscaling_group_names[0],
key = "k8s.io/cluster-autoscaler/node-template/taint/${taint.key}"
value = "${taint.value}:${local.taint_effects[taint.effect]}"
}
}
]...)
cluster_autoscaler_asg_tags = merge(local.cluster_autoscaler_label_tags, local.cluster_autoscaler_taint_tags)
}
resource "aws_autoscaling_group_tag" "cluster_autoscaler_label_tags" {
for_each = local.cluster_autoscaler_asg_tags
autoscaling_group_name = each.value.autoscaling_group
tag {
key = each.value.key
value = each.value.value
propagate_at_launch = false
}
}