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feat: add kubernetes service registration #94

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Apr 29, 2021
Merged

feat: add kubernetes service registration #94

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64 changes: 63 additions & 1 deletion terraform/k8s.tf
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,43 @@ resource "kubernetes_secret" "vault-tls" {
}
}

resource "kubernetes_service_account" "vault-server" {
metadata {
name = "vault-server"
}
}

resource "kubernetes_role" "vault-server" {
metadata {
name = "vault-server"
}

rule {
api_groups = [""]
resources = ["pods"]
resource_names = [for i in range(var.num_vault_pods) : "vault-${i}"]
verbs = ["get", "patch", "update"]
}
}

resource "kubernetes_role_binding" "vault-server" {
metadata {
name = "vault-server"
}

role_ref {
api_group = "rbac.authorization.k8s.io"
kind = "Role"
name = kubernetes_role.vault-server.metadata.0.name
}

subject {
kind = "ServiceAccount"
name = kubernetes_service_account.vault-server.metadata.0.name
namespace = kubernetes_service_account.vault-server.metadata.0.namespace
}
}

resource "kubernetes_service" "vault-lb" {
metadata {
name = "vault"
Expand All @@ -40,7 +77,8 @@ resource "kubernetes_service" "vault-lb" {
external_traffic_policy = "Local"

selector = {
app = "vault"
app = "vault"
vault-active = "true"
}

port {
Expand Down Expand Up @@ -78,6 +116,8 @@ resource "kubernetes_stateful_set" "vault" {
}

spec {
service_account_name = kubernetes_service_account.vault-server.metadata.0.name

termination_grace_period_seconds = 10

affinity {
Expand Down Expand Up @@ -189,12 +229,34 @@ resource "kubernetes_stateful_set" "vault" {
}
}

env {
name = "VAULT_K8S_POD_NAME"
value_from {
field_ref {
api_version = "v1"
field_path = "metadata.name"
}
}
}

env {
name = "VAULT_K8S_NAMESPACE"
value_from {
field_ref {
api_version = "v1"
field_path = "metadata.namespace"
}
}
}

env {
name = "VAULT_LOCAL_CONFIG"
value = <<EOF
api_addr = "https://${google_compute_address.vault.address}"
cluster_addr = "https://$(POD_IP_ADDR):8201"

service_registration "kubernetes" {}

log_level = "warn"

ui = true
Expand Down