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tls-k8s.tf
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tls-k8s.tf
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locals {
# Kubernetes TLS assets map
kubernetes_tls = {
"tls/k8s/ca.crt" = tls_self_signed_cert.kube-ca.cert_pem,
"tls/k8s/ca.key" = tls_private_key.kube-ca.private_key_pem,
"tls/k8s/apiserver.crt" = tls_locally_signed_cert.apiserver.cert_pem,
"tls/k8s/apiserver.key" = tls_private_key.apiserver.private_key_pem,
"tls/k8s/service-account.pub" = tls_private_key.service-account.public_key_pem
"tls/k8s/service-account.key" = tls_private_key.service-account.private_key_pem
}
}
# Kubernetes CA (tls/{ca.crt,ca.key})
resource "tls_private_key" "kube-ca" {
algorithm = "RSA"
rsa_bits = "2048"
}
resource "tls_self_signed_cert" "kube-ca" {
key_algorithm = tls_private_key.kube-ca.algorithm
private_key_pem = tls_private_key.kube-ca.private_key_pem
subject {
common_name = "kubernetes-ca"
organization = "typhoon"
}
is_ca_certificate = true
validity_period_hours = 8760
allowed_uses = [
"key_encipherment",
"digital_signature",
"cert_signing",
]
}
# Kubernetes API Server (tls/{apiserver.key,apiserver.crt})
resource "tls_private_key" "apiserver" {
algorithm = "RSA"
rsa_bits = "2048"
}
resource "tls_cert_request" "apiserver" {
key_algorithm = tls_private_key.apiserver.algorithm
private_key_pem = tls_private_key.apiserver.private_key_pem
subject {
common_name = "kube-apiserver"
organization = "system:masters"
}
dns_names = flatten([
var.api_servers,
"kubernetes",
"kubernetes.default",
"kubernetes.default.svc",
"kubernetes.default.svc.${var.cluster_domain_suffix}",
])
ip_addresses = [
cidrhost(var.service_cidr, 1),
]
}
resource "tls_locally_signed_cert" "apiserver" {
cert_request_pem = tls_cert_request.apiserver.cert_request_pem
ca_key_algorithm = tls_self_signed_cert.kube-ca.key_algorithm
ca_private_key_pem = tls_private_key.kube-ca.private_key_pem
ca_cert_pem = tls_self_signed_cert.kube-ca.cert_pem
validity_period_hours = 8760
allowed_uses = [
"key_encipherment",
"digital_signature",
"server_auth",
"client_auth",
]
}
# Kubernetes Admin (tls/{admin.key,admin.crt})
resource "tls_private_key" "admin" {
algorithm = "RSA"
rsa_bits = "2048"
}
resource "tls_cert_request" "admin" {
key_algorithm = tls_private_key.admin.algorithm
private_key_pem = tls_private_key.admin.private_key_pem
subject {
common_name = "kubernetes-admin"
organization = "system:masters"
}
}
resource "tls_locally_signed_cert" "admin" {
cert_request_pem = tls_cert_request.admin.cert_request_pem
ca_key_algorithm = tls_self_signed_cert.kube-ca.key_algorithm
ca_private_key_pem = tls_private_key.kube-ca.private_key_pem
ca_cert_pem = tls_self_signed_cert.kube-ca.cert_pem
validity_period_hours = 8760
allowed_uses = [
"key_encipherment",
"digital_signature",
"client_auth",
]
}
# Kubernete's Service Account (tls/{service-account.key,service-account.pub})
resource "tls_private_key" "service-account" {
algorithm = "RSA"
rsa_bits = "2048"
}
# Kubelet
resource "tls_private_key" "kubelet" {
algorithm = "RSA"
rsa_bits = "2048"
}
resource "tls_cert_request" "kubelet" {
key_algorithm = tls_private_key.kubelet.algorithm
private_key_pem = tls_private_key.kubelet.private_key_pem
subject {
common_name = "kubelet"
organization = "system:nodes"
}
}