Feat: 🚀 Prepared addon for Keda (#32)

* feat: added keda addon * fix: fmt in main.tf * fix- removed the variable which were not in used * fix- removed the eks_cluster_name attribute * feat: added keda in basic example * fix- changed the version in readme file * feat- added keda outputs * feat- added strategy example --------- Co-authored-by: Anmol Nagpal <anmol@clouddrove.com>
clouddrove · Oct 1, 2023 · 3c989cb · 3c989cb
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diff --git a/.github/workflows/readme.yml b/.github/workflows/readme.yml
@@ -67,7 +67,7 @@ jobs:
       - name: Generate TF Docs
         uses: terraform-docs/gh-actions@v1.0.0
         with:
-          working-dir: addons/aws-ebs-csi-driver,addons/aws-efs-csi-driver,addons/aws-load-balancer-controller,addons/aws-node-termination-handler,addons/calico-tigera,addons/cluster-autoscaler,addons/external-secrets,addons/fluent-bit,addons/helm,addons/ingress-nginx,addons/istio-ingress,addons/karpenter,addons/kiali-server,addons/kubeclarity,addons/metrics-server,addons/nri-bundle,addons/velero,addons/kube-state-metrics
+          working-dir: addons/aws-ebs-csi-driver,addons/aws-efs-csi-driver,addons/aws-load-balancer-controller,addons/aws-node-termination-handler,addons/calico-tigera,addons/cluster-autoscaler,addons/external-secrets,addons/fluent-bit,addons/helm,addons/ingress-nginx,addons/istio-ingress,addons/karpenter,addons/kiali-server,addons/kubeclarity,addons/metrics-server,addons/nri-bundle,addons/velero,addons/kube-state-metrics,addons/keda
           git-push: true
           template: |-
             <!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->

diff --git a/_examples/basic/config/keda/override-keda.yaml b/_examples/basic/config/keda/override-keda.yaml
@@ -0,0 +1,9 @@
+affinity:
+  nodeAffinity:
+    requiredDuringSchedulingIgnoredDuringExecution:
+      nodeSelectorTerms:
+      - matchExpressions:
+        - key: "eks.amazonaws.com/nodegroup"
+          operator: In
+          values:
+          - "critical"
diff --git a/_examples/basic/config/keda/strategy_example.yaml b/_examples/basic/config/keda/strategy_example.yaml
@@ -0,0 +1,36 @@
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: nginx-deployment
+  namespace: nginx
+spec:
+  scaleTargetRef:
+    apiVersion:    apps/v1        # Optional. Default: apps/v1
+    kind:          Deployment     # Optional. Default: Deployment
+    name:          nginx      # Mandatory. Must be in the same namespace as the ScaledObject
+  pollingInterval:  5                    # Optional. Default: 5 seconds
+  cooldownPeriod:   20                  # Optional. Default: 300 seconds
+  minReplicaCount:  1                   # Optional. Default: 0
+  maxReplicaCount:  10                    # Optional. Default: 100
+  fallback:                                        # Optional. Section to specify fallback options
+    failureThreshold: 3                            # Mandatory if fallback section is included
+    replicas: 1                                    # Mandatory if fallback section is included
+  advanced:                                        # Optional. Section to specify advanced options
+    restoreToOriginalReplicaCount: true     # Optional. Default: false
+    horizontalPodAutoscalerConfig:          # Optional. Section to specify HPA related options
+      name: keda-hpa-nginx       # Optional. Default: keda-hpa-{scaled-object-name}
+      behavior:                             # Optional. Use to modify HPA's scaling behavior
+        scaleDown:
+          stabilizationWindowSeconds: 60
+          policies:
+            - type: Percent
+              value: 100
+              periodSeconds: 15
+  triggers:
+  - type: cron
+    metadata:
+      # Required
+      timezone: Asia/Kolkata  # The acceptable values would be a value from the IANA Time Zone Database.
+      start: "12 00 * * *"
+      end: "15 00 * * *"
+      desiredReplicas: "5"
diff --git a/_examples/basic/main.tf b/_examples/basic/main.tf
@@ -172,6 +172,7 @@ module "addons" {
   ingress_nginx                = true
   fluent_bit                   = true
   velero                       = true
+  keda                         = true
 
   # -- Addons with mandatory variable
   istio_ingress             = true

diff --git a/_examples/complete/config/keda/override-keda.yaml b/_examples/complete/config/keda/override-keda.yaml
@@ -0,0 +1,9 @@
+affinity:
+  nodeAffinity:
+    requiredDuringSchedulingIgnoredDuringExecution:
+      nodeSelectorTerms:
+      - matchExpressions:
+        - key: "eks.amazonaws.com/nodegroup"
+          operator: In
+          values:
+          - "critical"
diff --git a/_examples/complete/config/keda/strategy_example.yaml b/_examples/complete/config/keda/strategy_example.yaml
@@ -0,0 +1,36 @@
+apiVersion: keda.sh/v1alpha1
+kind: ScaledObject
+metadata:
+  name: nginx-deployment
+  namespace: nginx
+spec:
+  scaleTargetRef:
+    apiVersion:    apps/v1        # Optional. Default: apps/v1
+    kind:          Deployment     # Optional. Default: Deployment
+    name:          nginx      # Mandatory. Must be in the same namespace as the ScaledObject
+  pollingInterval:  5                    # Optional. Default: 5 seconds
+  cooldownPeriod:   20                  # Optional. Default: 300 seconds
+  minReplicaCount:  1                   # Optional. Default: 0
+  maxReplicaCount:  10                    # Optional. Default: 100
+  fallback:                                        # Optional. Section to specify fallback options
+    failureThreshold: 3                            # Mandatory if fallback section is included
+    replicas: 1                                    # Mandatory if fallback section is included
+  advanced:                                        # Optional. Section to specify advanced options
+    restoreToOriginalReplicaCount: true     # Optional. Default: false
+    horizontalPodAutoscalerConfig:          # Optional. Section to specify HPA related options
+      name: keda-hpa-nginx       # Optional. Default: keda-hpa-{scaled-object-name}
+      behavior:                             # Optional. Use to modify HPA's scaling behavior
+        scaleDown:
+          stabilizationWindowSeconds: 60
+          policies:
+            - type: Percent
+              value: 100
+              periodSeconds: 15
+  triggers:
+  - type: cron
+    metadata:
+      # Required
+      timezone: Asia/Kolkata  # The acceptable values would be a value from the IANA Time Zone Database.
+      start: "12 00 * * *"
+      end: "15 00 * * *"
+      desiredReplicas: "5"
diff --git a/_examples/complete/main.tf b/_examples/complete/main.tf
@@ -167,6 +167,7 @@ module "addons" {
   ingress_nginx = true
   fluent_bit    = true
   velero        = true
+  keda          = true
 
   # -- Addons with mandatory variable
   istio_ingress             = true
@@ -194,6 +195,7 @@ module "addons" {
   velero_helm_config                       = { values = [file("./config/override-velero.yaml")] }
   new_relic_helm_config                    = { values = [file("./config/override-new-relic.yaml")] }
   kube_state_metrics_helm_config           = { values = [file("./config/override-kube-state-matrics.yaml")] }
+  keda_helm_config                         = { values = [file("./config/keda/override-keda.yaml")] }
 
   # -- Override Helm Release attributes
   metrics_server_extra_configs               = var.metrics_server_extra_configs
@@ -213,6 +215,7 @@ module "addons" {
   velero_extra_configs                       = var.velero_extra_configs
   new_relic_extra_configs                    = var.new_relic_extra_configs
   kube_state_metrics_extra_configs           = var.kube_state_metrics_extra_configs
+  keda_extra_configs                         = var.keda_extra_configs
 
   # -- Custom IAM Policy Json for Addon's ServiceAccount
   cluster_autoscaler_iampolicy_json_content = file("./custom-iam-policies/cluster-autoscaler.json")

diff --git a/_examples/complete/variables.tf b/_examples/complete/variables.tf
@@ -134,4 +134,9 @@ variable "new_relic_extra_configs" {
 variable "kube_state_metrics_extra_configs" {
   type    = any
   default = {}
+}
+
+variable "keda_extra_configs" {
+  type    = any
+  default = {}
 }
diff --git a/addons/keda/README.md b/addons/keda/README.md
@@ -0,0 +1,70 @@
+# Keda Helm Chart
+
+KEDA allows for fine grained autoscaling (including to/from zero) for event driven Kubernetes workloads. 
+
+## Installation
+Below terraform script shows how to use Keda Terraform Addon, A complete example is also given [here](https://github.com/clouddrove/terraform-helm-eks-addons/blob/master/_examples/complete/main.tf).
+```bash
+module "addons" {
+  source  = "clouddrove/eks-addons/aws"
+  version = "0.0.9"
+
+  depends_on       = [module.eks.cluster_id]
+  eks_cluster_name = module.eks.cluster_name
+
+  keda = true
+}
+```
+
+<!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 1.0.0 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 3.72 |
+| <a name="requirement_kubernetes"></a> [kubernetes](#requirement\_kubernetes) | >= 2.10 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 3.72 |
+| <a name="provider_kubernetes"></a> [kubernetes](#provider\_kubernetes) | >= 2.10 |
+
+## Modules
+
+| Name | Source | Version |
+|------|--------|---------|
+| <a name="module_helm_addon"></a> [helm\_addon](#module\_helm\_addon) | ../helm | n/a |
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [aws_iam_policy.policy](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/iam_policy) | resource |
+| [kubernetes_namespace_v1.this](https://registry.terraform.io/providers/hashicorp/kubernetes/latest/docs/resources/namespace_v1) | resource |
+| [aws_eks_cluster.eks_cluster](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/eks_cluster) | data source |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_account_id"></a> [account\_id](#input\_account\_id) | n/a | `string` | `""` | no |
+| <a name="input_addon_context"></a> [addon\_context](#input\_addon\_context) | Input configuration for the addon | <pre>object({<br>    aws_caller_identity_account_id = string<br>    aws_caller_identity_arn        = string<br>    aws_eks_cluster_endpoint       = string<br>    aws_partition_id               = string<br>    aws_region_name                = string<br>    eks_cluster_id                 = string<br>    eks_oidc_issuer_url            = string<br>    eks_oidc_provider_arn          = string<br>    tags                           = map(string)<br>  })</pre> | n/a | yes |
+| <a name="input_keda_extra_configs"></a> [aws\_load\_balancer\_controller\_extra\_configs](#input\_keda\_configs) | Override attributes of helm\_release terraform resource | `any` | `{}` | no |
+| <a name="input_eks_cluster_name"></a> [eks\_cluster\_name](#input\_eks\_cluster\_name) | n/a | `string` | `""` | no |
+| <a name="input_helm_config"></a> [helm\_config](#input\_helm\_config) | Helm provider config for Keda | `any` | `{}` | no |
+| <a name="input_iampolicy_json_content"></a> [iampolicy\_json\_content](#input\_iampolicy\_json\_content) | Custom IAM Policy for Keda IRSA | `string` | `null` | no |
+| <a name="input_manage_via_gitops"></a> [manage\_via\_gitops](#input\_manage\_via\_gitops) | Determines if the add-on should be managed via GitOps | `bool` | `false` | no |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| <a name="output_chart_version"></a> [chart\_version](#output\_chart\_version) | n/a |
+| <a name="output_iam_policy"></a> [iam\_policy](#output\_iam\_policy) | n/a |
+| <a name="output_namespace"></a> [namespace](#output\_namespace) | n/a |
+| <a name="output_repository"></a> [repository](#output\_repository) | n/a |
+| <a name="output_service_account"></a> [service\_account](#output\_service\_account) | n/a |
+<!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->