feat(trip-planner): app stack (Tier-1, CNPG, Slack-signed webhook ingress)
Namespace trip-planner (tier=4-aux, keel enrolled), ExternalSecret pulling secret/trip-planner from vault-kv, DB-creds ExternalSecret from vault-database (static-creds/pg-trip-planner → asyncpg DSN), Deployment with migrate init container + main container (readiness+liveness /healthz, 256Mi req=limit, 100m cpu request), ClusterIP service port 8080, and ingress_factory with auth=none (Slack v0 HMAC signature verification in-app). Terraform fmt clean. NOT applied; requires Vault secret/trip-planner + CNPG trip_planner DB + Slack app config. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Viktor Barzin
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275
stacks/trip-planner/main.tf
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275
stacks/trip-planner/main.tf
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variable "image_tag" {
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type = string
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default = "latest"
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description = "trip-planner image tag. Use 8-char git SHA in CI."
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}
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variable "postgresql_host" { type = string }
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variable "tls_secret_name" {
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type = string
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sensitive = true
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}
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locals {
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namespace = "trip-planner"
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image = "forgejo.viktorbarzin.me/viktor/trip-planner:${var.image_tag}"
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labels = {
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app = "trip-planner"
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}
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}
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resource "kubernetes_namespace" "trip_planner" {
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metadata {
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name = local.namespace
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labels = {
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tier = local.tiers.aux
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"istio-injection" = "disabled"
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# Opt into Keel auto-update (inject-keel-annotations ClusterPolicy).
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"keel.sh/enrolled" = "true"
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}
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}
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lifecycle {
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# KYVERNO_LIFECYCLE_V1: goldilocks-vpa-auto-mode ClusterPolicy stamps this label.
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ignore_changes = [metadata[0].labels["goldilocks.fairwinds.com/vpa-update-mode"]]
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}
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}
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# App secrets — seed these in Vault before applying:
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# secret/trip-planner
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# SLACK_BOT_TOKEN — Slack bot OAuth token (xoxb-…)
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# SLACK_SIGNING_SECRET — Slack app signing secret (v0 HMAC) for request verification
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# TREK_API_URL — TREK instance base URL
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# TREK_API_KEY — TREK API key
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#
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# Schema in CNPG: `trip_planner` (alembic creates tables on first migrate).
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# DB user: created via Vault database engine — see static-creds/pg-trip-planner.
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resource "kubernetes_manifest" "external_secret" {
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manifest = {
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apiVersion = "external-secrets.io/v1beta1"
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kind = "ExternalSecret"
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metadata = {
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name = "trip-planner-secrets"
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namespace = local.namespace
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}
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spec = {
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refreshInterval = "15m"
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secretStoreRef = {
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name = "vault-kv"
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kind = "ClusterSecretStore"
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}
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target = {
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name = "trip-planner-secrets"
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template = {
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metadata = {
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annotations = {
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"reloader.stakater.com/match" = "true"
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}
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}
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}
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}
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dataFrom = [{
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extract = {
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key = "trip-planner"
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}
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}]
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}
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}
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depends_on = [kubernetes_namespace.trip_planner]
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}
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# DB credentials from Vault database engine (7-day rotation).
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# Builds the asyncpg DSN consumed by the FastAPI app as DB_CONNECTION_STRING.
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# Pre-req in dbaas: CNPG cluster has DB `trip_planner`, role `trip_planner`,
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# and Vault role `static-creds/pg-trip-planner`.
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resource "kubernetes_manifest" "db_external_secret" {
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manifest = {
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apiVersion = "external-secrets.io/v1beta1"
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kind = "ExternalSecret"
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metadata = {
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name = "trip-planner-db-creds"
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namespace = local.namespace
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}
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spec = {
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refreshInterval = "15m"
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secretStoreRef = {
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name = "vault-database"
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kind = "ClusterSecretStore"
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}
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target = {
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name = "trip-planner-db-creds"
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template = {
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metadata = {
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annotations = {
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"reloader.stakater.com/match" = "true"
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}
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}
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data = {
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DB_CONNECTION_STRING = "postgresql+asyncpg://trip_planner:{{ .password }}@${var.postgresql_host}:5432/trip_planner"
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DB_PASSWORD = "{{ .password }}"
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}
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}
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}
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data = [{
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secretKey = "password"
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remoteRef = {
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key = "static-creds/pg-trip-planner"
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property = "password"
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}
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}]
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}
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}
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depends_on = [kubernetes_namespace.trip_planner]
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}
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resource "kubernetes_deployment" "trip_planner" {
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metadata {
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name = "trip-planner"
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namespace = kubernetes_namespace.trip_planner.metadata[0].name
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labels = merge(local.labels, {
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tier = local.tiers.aux
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})
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annotations = {
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"reloader.stakater.com/search" = "true"
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}
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}
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spec {
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# Single leader: Slack event deduplication and the webhook receiver want
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# one writer. Recreate avoids two pods racing on the same DB session.
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replicas = 1
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strategy {
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type = "Recreate"
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}
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selector {
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match_labels = local.labels
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}
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template {
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metadata {
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labels = local.labels
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}
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spec {
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image_pull_secrets {
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name = "registry-credentials"
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}
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init_container {
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name = "migrate"
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image = local.image
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command = ["python", "-m", "trip_planner", "migrate"]
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env_from {
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secret_ref { name = "trip-planner-secrets" }
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}
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env_from {
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secret_ref { name = "trip-planner-db-creds" }
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}
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resources {
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requests = { cpu = "50m", memory = "128Mi" }
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limits = { memory = "256Mi" }
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}
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}
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container {
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name = "trip-planner"
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image = local.image
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port {
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container_port = 8080
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}
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env_from {
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secret_ref { name = "trip-planner-secrets" }
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}
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env_from {
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secret_ref { name = "trip-planner-db-creds" }
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}
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readiness_probe {
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http_get {
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path = "/healthz"
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port = 8080
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}
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initial_delay_seconds = 5
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period_seconds = 10
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}
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liveness_probe {
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http_get {
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path = "/healthz"
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port = 8080
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}
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initial_delay_seconds = 30
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period_seconds = 30
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}
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resources {
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requests = { cpu = "100m", memory = "256Mi" }
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limits = { memory = "256Mi" }
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}
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}
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}
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}
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}
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lifecycle {
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ignore_changes = [
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spec[0].template[0].spec[0].dns_config, # KYVERNO_LIFECYCLE_V1
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metadata[0].annotations["keel.sh/policy"],
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metadata[0].annotations["keel.sh/trigger"],
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metadata[0].annotations["keel.sh/pollSchedule"], # KYVERNO_LIFECYCLE_V2
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metadata[0].annotations["keel.sh/match-tag"],
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spec[0].template[0].spec[0].container[0].image, # KEEL_IGNORE_IMAGE — Keel manages tag updates
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spec[0].template[0].spec[0].init_container[0].image,
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metadata[0].annotations["kubernetes.io/change-cause"],
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metadata[0].annotations["deployment.kubernetes.io/revision"],
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spec[0].template[0].metadata[0].annotations["keel.sh/update-time"], # KEEL_LIFECYCLE_V1
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]
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}
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depends_on = [
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kubernetes_manifest.external_secret,
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kubernetes_manifest.db_external_secret,
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]
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}
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resource "kubernetes_service" "trip_planner" {
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metadata {
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name = "trip-planner"
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namespace = kubernetes_namespace.trip_planner.metadata[0].name
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labels = local.labels
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}
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spec {
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type = "ClusterIP"
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selector = local.labels
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port {
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name = "http"
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port = 8080
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target_port = 8080
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}
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}
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}
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# Kyverno ClusterPolicy `sync-tls-secret` auto-clones the wildcard TLS
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# secret into every namespace, so we don't need a setup_tls_secret module.
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# Public ingress for the Slack events webhook. All requests carry a
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# Slack v0 HMAC signature (X-Slack-Signature header) that the app verifies
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# before processing — Authentik forward-auth would intercept the POST and
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# break Slack's delivery retries.
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module "ingress" {
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source = "../../modules/kubernetes/ingress_factory"
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# auth = "none": Slack webhook receiver — gated by Slack v0 signature verification in-app, not Authentik
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auth = "none"
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anti_ai_scraping = false
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dns_type = "proxied"
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namespace = kubernetes_namespace.trip_planner.metadata[0].name
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name = "trip-planner"
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port = 8080
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tls_secret_name = var.tls_secret_name
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}
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1
stacks/trip-planner/secrets
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1
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../../secrets
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23
stacks/trip-planner/terragrunt.hcl
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23
stacks/trip-planner/terragrunt.hcl
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include "root" {
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path = find_in_parent_folders()
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}
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dependency "platform" {
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config_path = "../platform"
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skip_outputs = true
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}
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dependency "vault" {
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config_path = "../vault"
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skip_outputs = true
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}
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dependency "external-secrets" {
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config_path = "../external-secrets"
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skip_outputs = true
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}
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inputs = {
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# Override per-deploy in CI / commit.
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image_tag = "latest"
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}
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