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publick8s.tf
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resource "azurerm_resource_group" "publick8s" {
name = "publick8s"
location = var.location
tags = local.default_tags
}
resource "random_pet" "suffix_publick8s" {
# You want to taint this resource in order to get a new pet
}
# Important: the Enterprise Application "terraform-production" used by this repo pipeline needs to be able to manage this vnet
# See the corresponding role assignment for this cluster added here (private repo):
# https://github.com/jenkins-infra/terraform-states/blob/44521bf0a03b4ab1a99712c215d40afafcaf04d6/azure/main.tf#L75
data "azurerm_subnet" "publick8s_tier" {
name = "publick8s-tier"
resource_group_name = data.azurerm_resource_group.public.name
virtual_network_name = data.azurerm_virtual_network.public.name
}
data "azurerm_subnet" "public_vnet_data_tier" {
name = "public-vnet-data-tier"
resource_group_name = data.azurerm_resource_group.public.name
virtual_network_name = data.azurerm_virtual_network.public.name
}
#tfsec:ignore:azure-container-logging #tfsec:ignore:azure-container-limit-authorized-ips
resource "azurerm_kubernetes_cluster" "publick8s" {
name = "publick8s-${random_pet.suffix_publick8s.id}"
location = azurerm_resource_group.publick8s.location
resource_group_name = azurerm_resource_group.publick8s.name
kubernetes_version = "1.24.9"
dns_prefix = "publick8s-${random_pet.suffix_publick8s.id}"
role_based_access_control_enabled = true # default value, added to please tfsec
api_server_access_profile {
authorized_ip_ranges = setunion(
# admins
formatlist("%s/32", values(local.admin_allowed_ips)),
# private VPN access
data.azurerm_subnet.private_vnet_data_tier.address_prefixes,
# privatek8s nodes subnet
data.azurerm_subnet.privatek8s_tier.address_prefixes,
[local.privatek8s_outbound_ip_cidr],
)
}
#tfsec:ignore:azure-container-configured-network-policy
network_profile {
network_plugin = "kubenet"
ip_versions = ["IPv4", "IPv6"]
}
default_node_pool {
name = "systempool"
vm_size = "Standard_D2as_v4" # 2 vCPU, 8 GB RAM, 16 GB disk, 4000 IOPS
os_disk_type = "Ephemeral"
os_disk_size_gb = 30
node_count = 1
vnet_subnet_id = data.azurerm_subnet.publick8s_tier.id
tags = local.default_tags
zones = [3]
}
identity {
type = "SystemAssigned"
}
tags = local.default_tags
}
resource "azurerm_kubernetes_cluster_node_pool" "publicpool" {
name = "publicpool"
vm_size = "Standard_D8s_v3" # 8 vCPU, 32 GB RAM, 64 GB disk, 16 000 IOPS
os_disk_type = "Ephemeral"
os_disk_size_gb = 200 # Ref. Cache storage size at https://learn.microsoft.com/en-us/azure/virtual-machines/dv3-dsv3-series#dsv3-series (depends on the instance size)
kubernetes_cluster_id = azurerm_kubernetes_cluster.publick8s.id
enable_auto_scaling = true
min_count = 0
max_count = 10
zones = [3]
vnet_subnet_id = data.azurerm_subnet.publick8s_tier.id
tags = local.default_tags
}
resource "azurerm_kubernetes_cluster_node_pool" "x86medium" {
name = "x86medium"
vm_size = "Standard_D8s_v3" # 8 vCPU, 32 GB RAM, 64 GB disk, 16 000 IOPS
os_disk_type = "Ephemeral"
os_disk_size_gb = 200 # Ref. Cache storage size at https://learn.microsoft.com/en-us/azure/virtual-machines/dv3-dsv3-series#dsv3-series (depends on the instance size)
kubernetes_cluster_id = azurerm_kubernetes_cluster.publick8s.id
enable_auto_scaling = true
min_count = 0
max_count = 10
zones = [3]
vnet_subnet_id = data.azurerm_subnet.publick8s_tier.id
tags = local.default_tags
}
resource "azurerm_kubernetes_cluster_node_pool" "arm64small" {
name = "arm64small"
vm_size = "Standard_D4pds_v5" # 4 vCPU, 16 GB RAM, local disk: 150 GB and 19000 IOPS
os_disk_type = "Ephemeral"
os_disk_size_gb = 150 # Ref. Cache storage size at https://learn.microsoft.com/en-us/azure/virtual-machines/dpsv5-dpdsv5-series#dpdsv5-series (depends on the instance size)
kubernetes_cluster_id = azurerm_kubernetes_cluster.publick8s.id
enable_auto_scaling = true
min_count = 0
max_count = 10
zones = [3]
vnet_subnet_id = data.azurerm_subnet.publick8s_tier.id
tags = local.default_tags
}
# Allow cluster to manage LBs in the publick8s-tier subnet (Public LB)
resource "azurerm_role_assignment" "publick8s_networkcontributor" {
scope = "${data.azurerm_subscription.jenkins.id}/resourceGroups/${data.azurerm_resource_group.public.name}/providers/Microsoft.Network/virtualNetworks/${data.azurerm_virtual_network.public.name}/subnets/${data.azurerm_subnet.publick8s_tier.name}"
role_definition_name = "Network Contributor"
principal_id = azurerm_kubernetes_cluster.publick8s.identity[0].principal_id
skip_service_principal_aad_check = true
}
# Allow cluster to manage LBs in the public-vnet-data-tier subnet (internal LBs)
resource "azurerm_role_assignment" "public_vnet_data_tier_networkcontributor" {
scope = "${data.azurerm_subscription.jenkins.id}/resourceGroups/${data.azurerm_resource_group.public.name}/providers/Microsoft.Network/virtualNetworks/${data.azurerm_virtual_network.public.name}/subnets/${data.azurerm_subnet.public_vnet_data_tier.name}"
role_definition_name = "Network Contributor"
principal_id = azurerm_kubernetes_cluster.publick8s.identity[0].principal_id
skip_service_principal_aad_check = true
}
resource "kubernetes_storage_class" "managed_csi_premium_retain_public" {
metadata {
name = "managed-csi-premium-retain"
}
storage_provisioner = "disk.csi.azure.com"
reclaim_policy = "Retain"
parameters = {
skuname = "Premium_LRS"
}
provider = kubernetes.publick8s
allow_volume_expansion = true
}
# Used later by the load balancer deployed on the cluster, see https://github.com/jenkins-infra/kubernetes-management/config/publick8s.yaml
resource "azurerm_public_ip" "publick8s_ipv4" {
name = "public-publick8s-ipv4"
resource_group_name = azurerm_kubernetes_cluster.publick8s.node_resource_group
location = var.location
ip_version = "IPv4"
allocation_method = "Static"
sku = "Standard" # Needed to fix the error "PublicIPAndLBSkuDoNotMatch"
tags = local.default_tags
}
resource "azurerm_public_ip" "publick8s_ipv6" {
name = "public-publick8s-ipv6"
resource_group_name = azurerm_kubernetes_cluster.publick8s.node_resource_group
location = var.location
ip_version = "IPv6"
allocation_method = "Static"
sku = "Standard" # Needed to fix the error "PublicIPAndLBSkuDoNotMatch"
tags = local.default_tags
}
resource "azurerm_dns_a_record" "public_publick8s" {
name = "public.publick8s"
zone_name = data.azurerm_dns_zone.jenkinsio.name
resource_group_name = data.azurerm_resource_group.proddns_jenkinsio.name
ttl = 300
records = [azurerm_public_ip.publick8s_ipv4.ip_address]
tags = local.default_tags
}
resource "azurerm_dns_aaaa_record" "public_publick8s" {
name = "public.publick8s"
zone_name = data.azurerm_dns_zone.jenkinsio.name
resource_group_name = data.azurerm_resource_group.proddns_jenkinsio.name
ttl = 300
records = [azurerm_public_ip.publick8s_ipv6.ip_address]
tags = local.default_tags
}
resource "azurerm_dns_a_record" "private_publick8s" {
name = "private.publick8s"
zone_name = data.azurerm_dns_zone.jenkinsio.name
resource_group_name = data.azurerm_resource_group.proddns_jenkinsio.name
ttl = 300
records = ["10.245.1.4"] # External IP of the private-nginx ingress LoadBalancer, created by https://github.com/jenkins-infra/kubernetes-management/blob/54a0d4aa72b15f4236abcfbde00a080905bbb890/clusters/publick8s.yaml#L63-L69
tags = local.default_tags
}
output "publick8s_kube_config" {
value = azurerm_kubernetes_cluster.publick8s.kube_config_raw
sensitive = true
}
output "publick8s_public_ipv4_address" {
value = azurerm_public_ip.publick8s_ipv4.ip_address
}
output "publick8s_public_ipv6_address" {
value = azurerm_public_ip.publick8s_ipv6.ip_address
}
output "publick8s_kube_config_command" {
value = "az aks get-credentials --name ${azurerm_kubernetes_cluster.publick8s.name} --resource-group ${azurerm_kubernetes_cluster.publick8s.resource_group_name}"
}