109 lines
3.0 KiB
HCL
109 lines
3.0 KiB
HCL
locals {
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# flatcar-stable -> Flatcar Linux Stable
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channel = split("-", var.os_image)[1]
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offer_suffix = var.arch == "arm64" ? "corevm" : "free"
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urn = var.arch == "arm64" ? local.channel : "${local.channel}-gen2"
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}
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# Workers scale set
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resource "azurerm_linux_virtual_machine_scale_set" "workers" {
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resource_group_name = var.resource_group_name
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name = "${var.name}-worker"
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location = var.region
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sku = var.vm_type
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instances = var.worker_count
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# instance name prefix for instances in the set
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computer_name_prefix = "${var.name}-worker"
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single_placement_group = false
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custom_data = base64encode(data.ct_config.worker.rendered)
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# storage
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os_disk {
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storage_account_type = "Standard_LRS"
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caching = "ReadWrite"
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}
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# Flatcar Container Linux
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source_image_reference {
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publisher = "kinvolk"
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offer = "flatcar-container-linux-${local.offer_suffix}"
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sku = local.urn
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version = "latest"
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}
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dynamic "plan" {
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for_each = var.arch == "arm64" ? [] : [1]
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content {
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publisher = "kinvolk"
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product = "flatcar-container-linux-${local.offer_suffix}"
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name = local.urn
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}
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}
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# Azure requires setting admin_ssh_key, though Ignition custom_data handles it too
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admin_username = "core"
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admin_ssh_key {
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username = "core"
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public_key = var.ssh_authorized_key
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}
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# network
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network_interface {
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name = "nic0"
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primary = true
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network_security_group_id = var.security_group_id
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ip_configuration {
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name = "ip0"
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primary = true
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subnet_id = var.subnet_id
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# backend address pool to which the NIC should be added
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load_balancer_backend_address_pool_ids = [var.backend_address_pool_id]
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}
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}
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# lifecycle
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upgrade_mode = "Manual"
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# eviction policy may only be set when priority is Spot
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priority = var.priority
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eviction_policy = var.priority == "Spot" ? "Delete" : null
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}
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# Scale up or down to maintain desired number, tolerating deallocations.
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resource "azurerm_monitor_autoscale_setting" "workers" {
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resource_group_name = var.resource_group_name
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name = "${var.name}-maintain-desired"
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location = var.region
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# autoscale
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enabled = true
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target_resource_id = azurerm_linux_virtual_machine_scale_set.workers.id
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profile {
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name = "default"
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capacity {
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minimum = var.worker_count
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default = var.worker_count
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maximum = var.worker_count
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}
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}
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}
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# Flatcar Linux worker
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data "ct_config" "worker" {
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content = templatefile("${path.module}/butane/worker.yaml", {
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kubeconfig = indent(10, var.kubeconfig)
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ssh_authorized_key = var.ssh_authorized_key
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cluster_dns_service_ip = cidrhost(var.service_cidr, 10)
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cluster_domain_suffix = var.cluster_domain_suffix
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node_labels = join(",", var.node_labels)
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node_taints = join(",", var.node_taints)
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})
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strict = true
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snippets = var.snippets
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}
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