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Add Flatcar Linux ARM64 support on Azure
* Kinvolk now publishes Flatcar Linux images for ARM64 * For now, amd64 image must specify a plan while arm64 images must NOT specify a plan due to how Kinvolk publishes. Rel: https://github.com/flatcar/Flatcar/issues/872
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@ -17,10 +17,10 @@ Notable changes between versions.
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### Flatcar Linux
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* Add Flatcar Linux ARM64 support on Azure ([docs](https://typhoon.psdn.io/advanced/arm64/), [#1251](https://github.com/poseidon/typhoon/pull/1251))
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* Switch from Azure Hypervisor gen1 to gen2 (**action required**) ([#1248](https://github.com/poseidon/typhoon/pull/1248))
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* Run `az vm image terms accept --publish kinvolk --offer flatcar-container-linux-free --plan stable-gen2`
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### Addons
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* Update Prometheus from v2.38.0 to [v2.39.1](https://github.com/prometheus/prometheus/releases/tag/v2.39.1)
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@ -50,6 +50,7 @@ Typhoon is available for [Flatcar Linux](https://www.flatcar-linux.org/releases/
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| Platform | Operating System | Terraform Module | Status |
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|---------------|------------------|------------------|--------|
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| AWS | Flatcar Linux (ARM64) | [aws/flatcar-linux/kubernetes](aws/flatcar-linux/kubernetes) | alpha |
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| Azure | Flatcar Linux (ARM64) | [azure/flatcar-linux/kubernetes](azure/flatcar-linux/kubernetes) | alpha |
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## Documentation
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@ -17,7 +17,9 @@ resource "azurerm_dns_a_record" "etcds" {
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locals {
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# Container Linux derivative
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# flatcar-stable -> Flatcar Linux Stable
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channel = split("-", var.os_image)[1]
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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 : "${local.channel}-gen2"
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}
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# Controller availability set to spread controllers
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@ -54,15 +56,18 @@ resource "azurerm_linux_virtual_machine" "controllers" {
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# Flatcar Container Linux
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source_image_reference {
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publisher = "kinvolk"
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offer = "flatcar-container-linux-free"
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sku = "${local.channel}-gen2"
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offer = "flatcar-container-linux-${local.offer_suffix}"
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sku = local.urn
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version = "latest"
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}
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plan {
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publisher = "kinvolk"
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product = "flatcar-container-linux-free"
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name = "${local.channel}-gen2"
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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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# network
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@ -133,6 +133,17 @@ variable "worker_node_labels" {
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default = []
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}
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variable "arch" {
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type = string
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description = "Container architecture (amd64 or arm64)"
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default = "amd64"
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validation {
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condition = var.arch == "amd64" || var.arch == "arm64"
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error_message = "The arch must be amd64 or arm64."
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}
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}
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variable "daemonset_tolerations" {
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type = list(string)
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description = "List of additional taint keys kube-system DaemonSets should tolerate (e.g. ['custom-role', 'gpu-role'])"
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@ -21,4 +21,5 @@ module "workers" {
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cluster_domain_suffix = var.cluster_domain_suffix
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snippets = var.worker_snippets
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node_labels = var.worker_node_labels
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arch = var.arch
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}
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@ -100,6 +100,17 @@ variable "node_taints" {
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default = []
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}
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variable "arch" {
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type = string
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description = "Container architecture (amd64 or arm64)"
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default = "amd64"
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validation {
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condition = var.arch == "amd64" || var.arch == "arm64"
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error_message = "The arch must be amd64 or arm64."
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}
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}
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# unofficial, undocumented, unsupported
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variable "cluster_domain_suffix" {
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@ -1,6 +1,8 @@
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locals {
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# flatcar-stable -> Flatcar Linux Stable
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channel = split("-", var.os_image)[1]
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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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@ -25,15 +27,18 @@ resource "azurerm_linux_virtual_machine_scale_set" "workers" {
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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-free"
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sku = "${local.channel}-gen2"
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offer = "flatcar-container-linux-${local.offer_suffix}"
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sku = local.urn
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version = "latest"
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}
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plan {
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publisher = "kinvolk"
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product = "flatcar-container-linux-free"
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name = "${local.channel}-gen2"
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dynamic "plan" {
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for_each = var.arch == "arm64" ? [] : [1]
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content {
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publisher = "kinvolk"
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product = "flatcar-container-linux-${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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@ -1,10 +1,15 @@
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# ARM64
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Typhoon supports ARM64 on AWS, with Fedora CoreOS or Flatcar Linux. Clusters can be created with ARM64 controller and worker nodes. Or worker pools of ARM64 nodes can be attached to an AMD64 cluster to create a hybrid/mixed architecture cluster.
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Typhoon supports ARM64 Kubernetes clusters with ARM64 controller and worker nodes (full-cluster) or adding worker pools of ARM64 nodes to clusters with an x86/amd64 control plane for a hybdrid (mixed-arch) cluster.
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Typhoon ARM64 clusters (full-cluster or mixed-arch) are available on:
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* AWS with Fedora CoreOS or Flatcar Linux
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* Azure with Flatcar Linux
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## Cluster
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Create a cluster with ARM64 controller and worker nodes. Container workloads must be `arm64` compatible and use `arm64` container images.
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Create a cluster on AWS with ARM64 controller and worker nodes. Container workloads must be `arm64` compatible and use `arm64` (or multi-arch) container images.
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=== "Fedora CoreOS Cluster (arm64)"
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@ -174,3 +179,29 @@ ip-10-0-22-79... Ready <none> 111m v1.25.3 10.0.22.79 <non
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ip-10-0-24-130 Ready <none> 111m v1.25.3 10.0.24.130 <none> Fedora CoreOS 35.20211215.3.0 5.15.7-200.fc35.x86_64 containerd://1.5.8
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ip-10-0-39-19 Ready <none> 111m v1.25.3 10.0.39.19 <none> Fedora CoreOS 35.20211215.3.0 5.15.7-200.fc35.x86_64 containerd://1.5.8
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```
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## Azure
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Create a cluster on Azure with ARM64 controller and worker nodes. Container workloads must be `arm64` compatible and use `arm64` (or multi-arch) container images.
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```tf
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module "ramius" {
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source = "git::https://github.com/poseidon/typhoon//azure/flatcar-linux/kubernetes?ref=v1.25.3"
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# Azure
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cluster_name = "ramius"
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region = "centralus"
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dns_zone = "azure.example.com"
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dns_zone_group = "example-group"
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# configuration
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ssh_authorized_key = "ssh-rsa AAAAB3Nz..."
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# optional
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arch = "arm64"
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controller_type = "Standard_D2pls_v5"
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worker_type = "Standard_D2pls_v5"
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worker_count = 2
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host_cidr = "10.0.0.0/20"
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}
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```
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@ -48,6 +48,7 @@ Typhoon is available for [Flatcar Linux](https://www.flatcar-linux.org/releases/
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| Platform | Operating System | Terraform Module | Status |
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|---------------|------------------|------------------|--------|
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| AWS | Flatcar Linux (ARM64) | [aws/flatcar-linux/kubernetes](advanced/arm64.md) | alpha |
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| Azure | Flatcar Linux (ARM64) | [azure/flatcar-linux/kubernetes](advanced/arm64.md) | alpha |
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## Documentation
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