infrastructure/modules/cluster/main.tf
2024-07-25 17:42:08 +02:00

304 lines
8.6 KiB
HCL

locals {
cluster_api_domain = "${var.cluster.api.subdomain}.${var.cluster.domain}"
cluster_endpoint = "https://${local.cluster_api_domain}:${var.cluster.api.port}"
podSubnets = [
"10.200.0.0/16",
"fd9b:5314:fc70::/56",
]
serviceSubnets = [
"10.201.0.0/16",
"fd9b:5314:fc71::/112",
]
# Nodes will use IPs from this subnets
# for communication between each other.
tailscaleSubnets = [
"100.64.0.0/10",
"fd7a:115c:a1e0::/96"
]
talos_controlplane_config = {
machine = {
features = {
rbac = true
apidCheckExtKeyUsage = true
kubernetesTalosAPIAccess = {
enabled = true
allowedRoles = [
"os:reader"
]
allowedKubernetesNamespaces = [
"kube-system"
]
}
}
}
cluster = {
etcd = {
advertisedSubnets = local.tailscaleSubnets
listenSubnets = local.tailscaleSubnets
}
allowSchedulingOnControlPlanes = var.allow_scheduling_on_control_planes,
apiServer = {
extraArgs = {
"oidc-issuer-url" = "https://id.tjo.space/application/o/k8stjocloud/",
"oidc-client-id" = "HAI6rW0EWtgmSPGKAJ3XXzubQTUut2GMeTRS2spg",
"oidc-username-claim" = "sub",
"oidc-username-prefix" = "oidc:",
"oidc-groups-claim" = "groups",
"oidc-groups-prefix" = "oidc:groups:",
}
}
inlineManifests = [
{
name = "proxmox-cloud-controller-manager"
contents = data.helm_template.proxmox-ccm.manifest
},
{
name = "talos-cloud-controller-manager"
contents = data.helm_template.talos-ccm.manifest
},
{
name = "promxmox-csi-plugin"
contents = data.helm_template.proxmox-csi.manifest
},
{
name = "gateway-api-crds"
contents = file("${path.module}/manifests/gateway-api.crds.yaml")
},
{
name = "metrics-server"
contents = file("${path.module}/manifests/metrics-server.yaml")
},
{
name = "cilium"
contents = data.helm_template.cilium.manifest
},
{
name = "oidc-admins"
contents = <<-EOF
apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRoleBinding
metadata:
name: id-tjo-space:admins
subjects:
- kind: Group
name: oidc:groups:k8s.tjo.cloud admin
apiGroup: rbac.authorization.k8s.io
roleRef:
kind: ClusterRole
name: cluster-admin
apiGroup: rbac.authorization.k8s.io
EOF
},
]
}
}
talos_worker_config = {
cluster = {
externalCloudProvider = {
enabled = true
}
controlPlane = {
endpoint = local.cluster_endpoint
localAPIServerPort = var.cluster.api.port
}
network = {
cni = {
name = "none"
}
podSubnets = local.podSubnets
serviceSubnets = local.serviceSubnets
}
proxy = {
disabled = true
}
}
machine = {
kubelet = {
nodeIP = {
validSubnets = local.tailscaleSubnets
}
extraArgs = {
rotate-server-certificates = true
cloud-provider = "external"
}
}
install = {
image = "factory.talos.dev/installer/${var.talos.schematic_id}:${var.talos.version}"
disk = "/dev/vda"
}
}
}
talos_node_config = {
for k, node in local.nodes_with_address : k => [
yamlencode({
machine = {
network = {
hostname = node.name
kubespan = {
enabled = false
}
}
nodeLabels = {
"k8s.tjo.cloud/public" = node.public ? "true" : "false"
"k8s.tjo.cloud/host" = node.host
"k8s.tjo.cloud/proxmox" = var.proxmox.name
}
sysctls = {
"net.ipv4.ip_forward" = "1"
"net.ipv6.conf.all.forwarding" = "1"
}
}
}),
yamlencode(
{
apiVersion = "v1alpha1"
kind = "ExtensionServiceConfig"
name = "tailscale"
environment = [
"TS_AUTHKEY=${var.tailscale_authkey}",
"TS_HOSTNAME=${node.name}",
"TS_ROUTES=${join(",", local.podSubnets)},${join(",", local.serviceSubnets)}",
#"TS_EXTRA_ARGS=--accept-routes --snat-subnet-routes",
]
})
]
}
}
resource "digitalocean_record" "controlplane-A" {
for_each = { for k, node in local.nodes_with_address : k => node if node.type == "controlplane" }
domain = var.cluster.domain
type = "A"
name = var.cluster.api.subdomain
value = each.value.ipv4
ttl = 30
}
resource "digitalocean_record" "controlplane-AAAA" {
for_each = { for k, node in local.nodes_with_address : k => node if node.type == "controlplane" }
domain = var.cluster.domain
type = "AAAA"
name = var.cluster.api.subdomain
value = each.value.ipv6
ttl = 30
}
resource "talos_machine_secrets" "this" {
talos_version = var.talos.version
}
data "talos_machine_configuration" "controlplane" {
cluster_name = var.cluster.name
machine_type = "controlplane"
cluster_endpoint = local.cluster_endpoint
machine_secrets = talos_machine_secrets.this.machine_secrets
talos_version = var.talos.version
kubernetes_version = var.talos.kubernetes
depends_on = [
digitalocean_record.controlplane-A,
digitalocean_record.controlplane-AAAA,
]
}
data "talos_machine_configuration" "worker" {
cluster_name = var.cluster.name
machine_type = "worker"
cluster_endpoint = local.cluster_endpoint
machine_secrets = talos_machine_secrets.this.machine_secrets
talos_version = var.talos.version
kubernetes_version = var.talos.kubernetes
depends_on = [
digitalocean_record.controlplane-A,
digitalocean_record.controlplane-AAAA
]
}
resource "talos_machine_configuration_apply" "controlplane" {
for_each = { for k, v in local.nodes_with_address : k => v if v.type == "controlplane" }
client_configuration = talos_machine_secrets.this.client_configuration
machine_configuration_input = data.talos_machine_configuration.controlplane.machine_configuration
node = each.value.name
endpoint = each.value.ipv4
apply_mode = "reboot"
config_patches = concat(
[
yamlencode(local.talos_worker_config),
yamlencode(local.talos_controlplane_config)
],
local.talos_node_config[each.key]
)
}
resource "talos_machine_configuration_apply" "worker" {
for_each = { for k, v in local.nodes_with_address : k => v if v.type == "worker" }
client_configuration = talos_machine_secrets.this.client_configuration
machine_configuration_input = data.talos_machine_configuration.worker.machine_configuration
node = each.value.name
endpoint = each.value.ipv4
apply_mode = "reboot"
config_patches = concat(
[
yamlencode(local.talos_worker_config)
],
local.talos_node_config[each.key]
)
}
resource "talos_machine_bootstrap" "this" {
depends_on = [
talos_machine_configuration_apply.controlplane,
talos_machine_configuration_apply.worker
]
node = local.first_controlplane_node.name
endpoint = local.first_controlplane_node.ipv4
client_configuration = talos_machine_secrets.this.client_configuration
}
data "talos_cluster_kubeconfig" "this" {
depends_on = [
talos_machine_bootstrap.this
]
client_configuration = talos_machine_secrets.this.client_configuration
node = local.first_controlplane_node.ipv4
}
resource "local_file" "kubeconfig" {
content = data.talos_cluster_kubeconfig.this.kubeconfig_raw
filename = "${path.root}/admin.kubeconfig"
}
data "talos_client_configuration" "this" {
count = length(values({ for k, v in local.nodes_with_address : k => v if v.type == "controlplane" })) > 0 ? 1 : 0
cluster_name = var.cluster.name
client_configuration = talos_machine_secrets.this.client_configuration
endpoints = values({ for k, v in local.nodes_with_address : k => v if v.type == "controlplane" })[*].ipv4
}
resource "local_file" "talosconfig" {
count = length(values({ for k, v in local.nodes : k => v if v.type == "controlplane" })) > 0 ? 1 : 0
content = nonsensitive(data.talos_client_configuration.this[0].talos_config)
filename = "${path.root}/admin.talosconfig"
}