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variables.tf
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variables.tf
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#########################
### GENERAL CONFIGS ###
#########################
variable "cluster_name" {
description = "The name of the Amazon EKS cluster. This is a unique identifier for your EKS cluster within the AWS region."
default = "eks-cluster"
}
variable "aws_region" {
description = "AWS region where the EKS cluster will be deployed. This should be set to the region where you want your Kubernetes resources to reside."
default = "us-east-1"
}
variable "k8s_version" {
description = "The version of Kubernetes to use for the EKS cluster. This version should be compatible with the AWS EKS service and other infrastructure components."
default = "1.30"
}
#########################
### CAPACITY CONFIGS ###
#########################
variable "nodes_instances_sizes" {
description = "A list of EC2 instance types to use for the EKS worker nodes. These instance types should balance between cost, performance, and resource requirements for your workload."
default = [
"t3.large"
]
}
variable "auto_scale_options" {
description = "Configuration for the EKS cluster auto-scaling. It includes the minimum (min), maximum (max), and desired (desired) number of worker nodes."
default = {
min = 4
max = 10
desired = 6
}
}
variable "cluster_autoscaler_toggle" {
type = bool
description = "Enable or disable the Cluster Autoscaler installation. When true, Cluster Autoscaler is installed to automatically adjust the number of nodes in the cluster."
default = false
}
#########################
### KARPENTER CONFIGS ###
#########################
variable "karpenter_toggle" {
type = bool
description = "Determines whether Karpenter is enabled for the EKS cluster. Karpenter is an open-source auto-scaler for Kubernetes clusters."
default = true
}
variable "karpenter_instance_family" {
type = list(any)
description = "Defines a list of EC2 instance families to be considered by Karpenter for node provisioning. Instance families like 'c6' and 'c5' offer different compute capabilities."
default = [
"c6",
"c6a",
"c5"
]
}
variable "karpenter_instance_sizes" {
type = list(any)
description = "Specifies a list of instance sizes within the chosen instance families to allow diversity in the provisioned nodes by Karpenter."
default = [
"large",
"2xlarge"
]
}
variable "karpenter_capacity_type" {
type = list(any)
description = "Defines the capacity types for provisioning instances in the cluster, such as 'spot' or 'on_demand', offering cost-saving options or consistent availability respectively."
default = [
"spot"
]
}
variable "karpenter_availability_zones" {
type = list(any)
description = "A list of AWS availability zones where Karpenter should launch nodes. These zones should be in the same region as the EKS cluster."
default = [
"us-east-1a",
"us-east-1b",
"us-east-1c"
]
}
#########################
### INGRESS CONFIGS ###
#########################
variable "nlb_ingress_internal" {
type = bool
description = "Indicates whether the Network Load Balancer (NLB) for the EKS cluster should be internal, restricting access to within the AWS network."
default = false
}
variable "nlb_ingress_type" {
type = string
description = "Specifies the type of ingress to be used, such as 'network', determining how the NLB handles incoming traffic to the EKS cluster."
default = "network"
}
variable "proxy_protocol_v2" {
type = bool
description = "Enables or disables Proxy Protocol v2 on the Network Load Balancer, used for preserving client IP addresses and other connection information."
default = false
}
variable "nlb_ingress_enable_termination_protection" {
type = bool
description = "Determines if termination protection is enabled for the Network Load Balancer, preventing accidental deletion."
default = false
}
variable "enable_cross_zone_load_balancing" {
type = bool
description = "Controls whether cross-zone load balancing is enabled for the Network Load Balancer, allowing even traffic distribution across all zones."
default = false
}
variable "enable_vpc_link" {
type = bool
description = "Create VPC Link associated to Network Load Balancing"
default = true
}
#########################
### ROUTE53 CONFIGS ###
#########################
variable "cluster_private_zone" {
type = string
description = "The private DNS zone name for the EKS cluster in AWS Route53. This zone is used for internal DNS resolution within the cluster."
default = "k8s.cluster"
}
#########################
### ISTIO CONFIGS ###
#########################
variable "istio_ingress_min_pods" {
type = number
description = "The minimum number of pods to maintain for the Istio ingress gateway. This ensures basic availability and load handling."
default = 3
}
variable "istio_ingress_max_pods" {
type = number
description = "The maximum number of pods to scale up for the Istio ingress gateway. This limits the resources used and manages the scaling behavior."
default = 9
}
#########################
# PROMETHEUS CONFIGS #
#########################
variable "enable_prometheus_stack" {
type = bool
description = ""
default = true
}
variable "grafana_virtual_service_host" {
type = string
description = "The hostname for the Grafana virtual service, used in Istio routing. This host is used to access Grafana dashboards for monitoring metrics."
default = "grafana.k8s.raj.ninja"
}
variable "kiali_virtual_service_host" {
type = string
description = "The hostname for the Kiali virtual service, a part of Istio's service mesh visualization. It provides insights into the mesh topology and performance."
default = "kiali.k8s.raj.ninja"
}
variable "jaeger_virtual_service_host" {
type = string
description = "The hostname for the Jaeger virtual service, used for tracing and monitoring microservices within the Istio service mesh."
default = "jaeger.k8s.raj.ninja"
}
#################################
# MANAGED PROMETHEUS CONFIGS #
#################################
variable "enable_managed_prometheus" {
type = bool
description = "Determines if the managed Prometheus service should be enabled. Managed Prometheus provides a fully managed monitoring service compatible with Prometheus."
default = false
}
variable "managed_prometheus_access_type" {
type = string
description = "Specifies the access type for managed Prometheus. 'CURRENT_ACCOUNT' limits access to the current AWS account, ensuring isolated and secure access to the monitoring data."
default = "CURRENT_ACCOUNT"
}
variable "managed_grafana_permission_type" {
type = string
description = "Defines the permission model for managed Grafana. 'SERVICE_MANAGED' allows AWS to manage permissions, simplifying the setup and management of Grafana."
default = "SERVICE_MANAGED"
}
variable "managed_grafana_authentication_providers" {
type = list(string)
description = "A list of authentication providers for managed Grafana. For example, 'SAML' can be used for integrating with identity providers, ensuring secure and centralized user management."
default = ["SAML"]
}
variable "managed_grafana_datasources" {
type = list(string)
description = "Specifies the data sources that managed Grafana can access. Includes options like 'CLOUDWATCH', 'PROMETHEUS', and 'XRAY', providing a wide range of data for comprehensive monitoring solutions."
default = ["CLOUDWATCH", "PROMETHEUS", "XRAY"]
}
variable "managed_grafana_notification_destinations" {
type = list(string)
description = "Lists the notification channels supported by managed Grafana. For instance, 'SNS' allows Grafana to send alerts and notifications through AWS Simple Notification Service."
default = ["SNS"]
}
###############################
### ARGO-ROLLOUTS CONFIGS ###
###############################
variable "argo_rollouts_virtual_service_host" {
type = string
description = "The hostname for the Argo Rollouts virtual service, used for advanced deployment capabilities like canary and blue-green deployments in Kubernetes."
default = "argo-rollouts.k8s.raj.ninja"
}
#########################
### GENERAL TOGGLES ###
#########################
variable "descheduler_toggle" {
type = bool
description = "Controls the installation of the Descheduler, a tool to balance and optimize the distribution of Pods across the cluster for improved efficiency."
default = false
}
variable "chaos_mesh_toggle" {
type = bool
description = "Determines whether to install Chaos Mesh, a cloud-native Chaos Engineering platform that orchestrates chaos experiments on Kubernetes environments."
default = false
}
variable "node_termination_handler_toggle" {
type = bool
description = "Enables the AWS Node Termination Handler, which ensures that Kubernetes workloads are gracefully handled during EC2 instance terminations or disruptions."
default = true
}
variable "argo_rollouts_toggle" {
type = bool
description = "Enables the installation of Argo Rollouts, providing advanced deployment strategies like Canary and Blue-Green deployments in Kubernetes."
default = true
}
variable "keda_toggle" {
type = bool
description = "Activates the installation of KEDA (Kubernetes Event-Driven Autoscaling), which adds event-driven scaling capabilities to Kubernetes workloads."
default = true
}
#########################
### ADDONS CONFIGS ###
#########################
variable "addon_cni_version" {
type = string
description = "Specifies the version of the AWS VPC CNI (Container Network Interface) plugin to use, which manages the network interfaces for pod networking."
default = "v1.18.3-eksbuild.1"
}
variable "addon_coredns_version" {
type = string
description = "Defines the version of CoreDNS to use, a DNS server/forwarder that is integral to internal Kubernetes DNS resolution."
default = "v1.11.1-eksbuild.9"
}
variable "addon_kubeproxy_version" {
type = string
description = "Sets the version of Kubeproxy to be used, which handles Kubernetes network services like forwarding the requests to correct containers."
default = "v1.30.0-eksbuild.3"
}
variable "addon_csi_version" {
type = string
description = "Indicates the version of the Container Storage Interface (CSI) driver to use for managing storage volumes in Kubernetes."
default = "v1.26.1-eksbuild.1"
}
variable "default_tags" {
type = map(string)
description = "A map of default tags to apply to all resources. These tags can help with identifying and organizing resources within the AWS environment."
default = {
Environment = "prod"
Foo = "Bar"
Ping = "Pong"
}
}