terraform-helm-eks-addons

Requirements

Name	Version
terraform	>= 1.0.0
aws	>= 4.23

Providers

Name	Version
aws	>= 4.23
kubernetes	>= 2.13
helm	>= 2.6
kubectl	>= 1.7.0

Modules

Name	Source	Version
k8s_addons	./addons/helm	0.0.1

Resources

Name	Use
helm_release	A terraform resource to deploy helm charts on kubernetes cluster

Inputs

Name	Description	Default	Required
metrics_server	To install metrics-server helmchart on eks cluster	False	Yes
metrics_server_helm_config	option to provide path to override-values.yaml	{values = "addons/metrics-server/config/metrics_server.yaml"}	No
cluster_autoscaler	To install cluster-autoscaler helmchart on eks cluster	False	Yes
cluster_autoscaler_helm_config	option to provide path to override-values.yaml	{values = "addons/cluster-autoscaler/config/cluster_autoscaler.yaml"}	No
aws_load_balancer_controller	To install aws-load-balancer-controller helmchart on eks cluster	False	Yes
aws_load_balancer_controller_helm_config	option to provide path to override-values.yaml	{values = "addons/aws-load-balancer-controller/config/aws_load_balancer_controller.yaml"}	No
aws_node_termination_handler	To install aws-node-termination-handler helmchart on eks cluster	False	Yes
aws_node_termination_handler_helm_config	option to provide path to override-values.yaml	{values = "addons/aws-node-termination-handler/config/aws_node_termination_handler.yaml"}	No
aws_efs_csi_driver	To install aws-efs-csi-driver helmchart on eks cluster	False	Yes
aws_efs_csi_driver_helm_config	option to provide path to override-values.yaml	{values = "addons/aws-efs-csi-driver/config/aws_efs_csi_driver.yaml"}	No
aws_ebs_csi_driver	To install aws-ebs-csi-driver helmchart on eks cluster	False	Yes
aws_ebs_csi_driver_helm_config	option to provide path to override-values.yaml	{values = "addons/aws-ebs-csi-driver/config/aws_ebs_csi_driver.yaml"}	No
karpenter	To install karpenter helmchart on eks cluster	False	Yes
karpenter_helm_config	option to provide path to override-values.yaml	{values = "addons/karpenter/config/karpenter.yaml"}	No
calico_tigera	To install Calico helmchart on eks cluster	False	Yes
calico_tigera_helm_config	option to provide path to override-values.yaml	{values = "addons/calico-tigera/config/calico-tigera-values.yaml"}	No
istio_ingress	To install Istio-ingress helmchart on eks cluster	False	Yes
istio_manifests	Kubernetes yaml manifests to create `ingress` and `gateway` with specified `host`	addons/istio-ingress/config/manifest/*.yaml	Yes
istio_ingress_helm_config	option to provide path to override-values.yaml	{values = "addons/istio-ingress/config/override-values.yaml"}	No
kiali_server	To install Kiali Dashboard helmchart on eks cluster	False	Yes
kiali_manifests	Includes VirtualService manifest file path and flag to install prometheus, grafana & jaeger	kiali_manifests { kiali_virtualservice_file_path = addons/kiali-server/config/kiali_vs.yaml enable_monitoring = true }	Yes
kiali_server_helm_config	option to provide path to override-values.yaml	{values = "addons/kiali-server/config/kiali_server.yaml"}	No

Outputs

No outputs.

How to Use

A complete documentation to use Calico with AWS EKS is present here
An example of usage is given here and below also.
Use below terraform module in your infrastructure's terraform script.

module "addons" {
  source  = "clouddrove/eks-addons/aws"
  version = "0.0.1"

  depends_on       = [module.eks.cluster_id]
  eks_cluster_name = module.eks.cluster_name

  metrics_server               = true
  cluster_autoscaler           = true
  aws_load_balancer_controller = true
  aws_node_termination_handler = true
  aws_efs_csi_driver           = true
  aws_ebs_csi_driver           = true

  kiali_server    = true
  kiali_manifests = var.kiali_manifests

  istio_ingress   = true
  istio_manifests = var.istio_manifests
}

Known Issues

Istio Ingress
- Our istio-ingress addon creates an Application Load Balancer on AWS by using aws-load-balancer-controller.
- aws-load-balancer-controller adds a finalizer field in ingress resource to prevent its manual deletion.
- Another case is that, this ingress will be non-deletable if aws-load-balancer-controller gets deleted before deletion of ingress
- Terraform does not controlls order of destructure which is sometimes causing aws-load-balancer-controller helmchart uninstallation before istio-ingress deletion.
- The same issue will come when an appliaction uses ingress of type ALB; In this case we need to delete istio-ingress & ALB of applications manually by following some extra steps as shown below.
  1. Set istio_ingress to false in your terraform addon module.
  2. Run terraform apply, this will delete all the resource created by istio-ingress addon including istio-load-balancer.
  3. To delete ingress created by application run below command
```
 kubectl patch ingress ingressName -n namespace -p '{"metadata":{"finalizers":[]}}' --type=merge
```
  4. Now you can run terraform destroy for complete destruction.
Calico CNI

Our calico-tigera addon creates trigera-operator and calico-node out of which calico-node is being created using a manifest (calico-deployment.yaml). This manifest create two serviceAccounts (calico-cni-plugin & calico-node) which needs to be delete manually as shown below -
1. Run kubectl edit serviceAccount calico-cni-plugin -n calico-system and delete finalizer block, then save and exit.
2. Run kubectl edit serviceAccount calico-node -n calico-system and delete finalizer block, then save and exit.
3. If both seriveAccount aren't deleted then run below command to delete them
```
kubectl delete seriveAccount calico-cni-plugin calico-node -n calico-system
```

Feedback

If you come accross a bug or have any feedback, please log it in our issue tracker, or feel free to drop us an email at hello@clouddrove.com.

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Tanveer143s / tflint-test