infra/stacks/privatebin/main.tf
Viktor Barzin fecfa211fd fix: pvc-autoresizer threshold should be 10%, not 80%
topolvm/pvc-autoresizer's threshold annotation is the FREE-SPACE
percentage below which expansion fires (per upstream README). Setting
it to "80%" means "expand when free-space drops below 80%", i.e. as
soon as the PVC crosses 20% utilization — which caused
prometheus-data-proxmox to be repeatedly expanded from 200Gi to 433Gi
in 70 minutes (six 10% bumps, all when the volume was only ~14% used).
Once the SC opt-in fix landed (1e4eac53) and the inode metrics fix
landed (02a12f1a), the autoresizer started actively misfiring across
75+ PVCs cluster-wide.

Flip the value to "10%" everywhere — that's "expand when free-space
drops below 10%", i.e. at 90% utilization, which is the conventional
semantic and matches the alert thresholds in
prometheus_chart_values.tpl (PVAutoExpanding fires at 80%, PVFillingUp
at 95%).

The CLAUDE.md PVC template was the source of the misconfig, so update
it too. Live PVC annotations were patched in parallel via kubectl
annotate; TF apply on each affected stack will be a no-op against
those live values.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
2026-05-10 19:56:16 +00:00

161 lines
4.4 KiB
HCL

variable "tls_secret_name" {
type = string
sensitive = true
}
variable "nfs_server" { type = string }
resource "kubernetes_namespace" "privatebin" {
metadata {
name = "privatebin"
labels = {
"istio-injection" : "disabled"
tier = local.tiers.edge
}
}
lifecycle {
# KYVERNO_LIFECYCLE_V1: goldilocks-vpa-auto-mode ClusterPolicy stamps this label on every namespace
ignore_changes = [metadata[0].labels["goldilocks.fairwinds.com/vpa-update-mode"]]
}
}
module "tls_secret" {
source = "../../modules/kubernetes/setup_tls_secret"
namespace = kubernetes_namespace.privatebin.metadata[0].name
tls_secret_name = var.tls_secret_name
}
resource "kubernetes_persistent_volume_claim" "data_proxmox" {
wait_until_bound = false
metadata {
name = "privatebin-data-proxmox"
namespace = kubernetes_namespace.privatebin.metadata[0].name
annotations = {
"resize.topolvm.io/threshold" = "10%"
"resize.topolvm.io/increase" = "100%"
"resize.topolvm.io/storage_limit" = "5Gi"
}
}
spec {
access_modes = ["ReadWriteOnce"]
storage_class_name = "proxmox-lvm"
resources {
requests = {
storage = "1Gi"
}
}
}
}
resource "kubernetes_deployment" "privatebin" {
metadata {
name = "privatebin"
namespace = kubernetes_namespace.privatebin.metadata[0].name
labels = {
app = "privatebin"
tier = local.tiers.edge
}
}
spec {
replicas = 1
strategy {
type = "Recreate"
}
selector {
match_labels = {
app = "privatebin"
}
}
template {
metadata {
labels = {
app = "privatebin"
}
}
spec {
container {
image = "privatebin/nginx-fpm-alpine"
name = "privatebin"
image_pull_policy = "IfNotPresent"
port {
container_port = 8080
}
volume_mount {
name = "data"
mount_path = "/srv/data"
sub_path = "data"
}
resources {
requests = {
cpu = "10m"
memory = "128Mi"
}
limits = {
memory = "128Mi"
}
}
}
volume {
name = "data"
persistent_volume_claim {
claim_name = kubernetes_persistent_volume_claim.data_proxmox.metadata[0].name
}
}
}
}
}
lifecycle {
# KYVERNO_LIFECYCLE_V1: Kyverno admission webhook mutates dns_config with ndots=2
ignore_changes = [spec[0].template[0].spec[0].dns_config]
}
}
resource "kubernetes_service" "privatebin" {
metadata {
name = "privatebin"
namespace = kubernetes_namespace.privatebin.metadata[0].name
labels = {
"app" = "privatebin"
}
}
spec {
selector = {
app = "privatebin"
}
port {
port = "80"
target_port = "8080"
}
}
}
# Anubis intentionally NOT used here — PrivateBin creates pastes via XHR
# `POST /`, which Anubis's catch-all CHALLENGE rule intercepts and serves
# an HTML challenge page where the JS expects JSON. PrivateBin pastes are
# client-side encrypted, so AI scrapers gain nothing from indexing them;
# the default `anti_ai_scraping` middleware is sufficient protection.
module "ingress" {
source = "../../modules/kubernetes/ingress_factory"
# Public pastebin — anyone can create/read pastes. Pastes are client-side
# encrypted; AI scrapers gain nothing from indexing them. anti_ai_scraping
# defaults on for auth=none, which is the existing protection.
auth = "none"
namespace = kubernetes_namespace.privatebin.metadata[0].name
name = "privatebin"
host = "pb"
dns_type = "proxied"
extra_middlewares = ["traefik-x402@kubernetescrd"]
tls_secret_name = var.tls_secret_name
custom_content_security_policy = "script-src 'self' 'unsafe-inline' 'unsafe-eval' 'wasm-unsafe-eval'"
extra_annotations = {
"gethomepage.dev/enabled" = "true"
"gethomepage.dev/name" = "PrivateBin"
"gethomepage.dev/description" = "Encrypted pastebin"
"gethomepage.dev/icon" = "privatebin.png"
"gethomepage.dev/group" = "Development & CI"
"gethomepage.dev/pod-selector" = ""
}
}