276 lines
10 KiB
YAML
276 lines
10 KiB
YAML
# k8s/talos-iam/authentik-values.yaml
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# Authentik — SSO Identity Provider for the homelab.
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# Provides OAuth2/OIDC login for Grafana, MinIO, Forgejo, and Argo CD.
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# Chart: authentik/authentik from https://charts.goauthentik.io
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#
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# Architecture: server (UI+API) + worker (background tasks) + PostgreSQL + Redis.
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# PostgreSQL is the system of record — must persist. Redis is ephemeral cache/queue.
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#
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# Secrets injected via helmfile --set (from .env / vsource):
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# AUTHENTIK_SECRET_KEY — signs sessions and tokens; set once, never rotate casually
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# AUTHENTIK_BOOTSTRAP_PASSWORD — initial akadmin password (used once at first login)
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# AUTHENTIK_BOOTSTRAP_TOKEN — API token for the setup_talos_iam.sh bootstrap script
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# AUTHENTIK_PG_PASSWORD — PostgreSQL user password
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authentik:
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# host: the external URL Authentik uses to build redirect URIs in OAuth2 flows.
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# Must match what the browser sees — if it returns an internal svc URL,
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# the browser's redirect after login will fail (can't reach svc DNS externally).
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# HTTP (not HTTPS) because the Authentik ingress has no TLS cert configured.
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host: "https://authentik.riotpiao.com"
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error_reporting:
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enabled: false # do not phone home to Sentry
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# PostgreSQL connection — points at CloudNativePG cluster in ddb namespace.
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# Uses 'app' bootstrap user (CNPG simple pattern, same as Forgejo).
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# Credentials injected from authentik-db-app secret via env vars below.
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postgresql:
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host: authentik-db-rw.iam.svc.cluster.local
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port: 5432
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name: authentik
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user: app # All apps use shared 'app' user (CNPG design pattern)
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password: "" # overridden by AUTHENTIK_POSTGRESQL__PASSWORD env var
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# Redis connection — bundled subchart, standalone mode (no sentinel/cluster).
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redis:
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host: authentik-redis-master
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# ── HTTP client timeouts ──────────────────────────────────────────────────────
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# Increased to tolerate 5+ second pod-to-pod network latency.
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# Affects webhooks, outpost management, SCIM, LDAP sync.
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# Default: ~30s — too aggressive when latency spikes hit 5-10s.
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log_level: debug # enable debug logging to monitor connection issues
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# ── CA trust (shared by server and worker) ────────────────────────────────────
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# Authentik (Python/Debian) uses requests + httpx for outgoing HTTPS — webhooks,
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# outpost management, SCIM. Both libraries need REQUESTS_CA_BUNDLE / SSL_CERT_FILE
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# to point to a bundle that includes homelab-ca, otherwise connections to other
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# homelab services fail with "certificate signed by unknown authority".
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#
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# Strategy: a debian:12-slim init container (run as root) concatenates the
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# Debian system Mozilla bundle with homelab-ca.crt into an emptyDir. The main
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# container then references /merged/ca-bundle.crt via two env vars that cover
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# every Python HTTP library.
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_caVolumes: &caVolumes
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- name: homelab-ca
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configMap:
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name: homelab-ca
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- name: merged-ca
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emptyDir: {}
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_caVolumeMounts: &caVolumeMounts
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- name: homelab-ca
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mountPath: /homelab-ca
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readOnly: true
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- name: merged-ca
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mountPath: /merged
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readOnly: true
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_caInitContainers: &caInitContainers
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- name: merge-ca-certs
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image: debian:bookworm
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imagePullPolicy: IfNotPresent
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securityContext:
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runAsUser: 0
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command:
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- sh
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- -c
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- (cat /etc/ssl/certs/ca-certificates.crt 2>/dev/null; cat /homelab-ca/homelab-ca.crt) > /merged/ca-bundle.crt
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volumeMounts:
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- name: homelab-ca
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mountPath: /homelab-ca
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readOnly: true
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- name: merged-ca
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mountPath: /merged
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# NOTE: no authentik-migrate init container — the authentik `server` entrypoint
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# runs migrations itself on startup. A separate `manage migrate` init pinned to
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# an older image tripped a version-history precheck on an empty DB
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# (relation "authentik_version_history" does not exist) and blocked boot.
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_caEnv: &caEnv
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- name: REQUESTS_CA_BUNDLE
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value: /merged/ca-bundle.crt
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- name: SSL_CERT_FILE
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value: /merged/ca-bundle.crt
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# ── Authentik server (UI + API) ───────────────────────────────────────────────
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# Handles all browser traffic: login flows, admin UI, OAuth2 authorize/token endpoints.
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# NodePort 32172 is a fallback for direct node access during troubleshooting;
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# normal access is via nginx ingress (authentik.riotpiao.com → svc:80).
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# Recreate: single replica + RWO-adjacent state — avoids split-brain on redeploy.
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server:
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replicas: 1
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# Merge SOPS-CMP-emitted secret values after the chart's own `authentik` secret.
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envFrom:
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- secretRef:
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name: authentik-secrets
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deploymentStrategy:
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type: Recreate
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service:
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type: NodePort
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nodePort: 32172
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resources:
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requests:
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cpu: 100m
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memory: 512Mi
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limits:
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cpu: 1000m
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memory: 1Gi
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tolerations:
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- key: node-role.kubernetes.io/control-plane
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operator: Exists
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effect: NoSchedule
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volumes: *caVolumes
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volumeMounts: *caVolumeMounts
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initContainers: *caInitContainers
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env:
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# Merge CA trust env vars
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- name: REQUESTS_CA_BUNDLE
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value: /merged/ca-bundle.crt
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- name: SSL_CERT_FILE
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value: /merged/ca-bundle.crt
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# Override database credentials to use 'app' from authentik-db-app
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- name: AUTHENTIK_POSTGRESQL__USER
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valueFrom:
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secretKeyRef:
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name: authentik-db-app
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key: username
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- name: AUTHENTIK_POSTGRESQL__PASSWORD
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valueFrom:
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secretKeyRef:
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name: authentik-db-app
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key: password
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podAnnotations:
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configmap.reloader.stakater.com/reload: "homelab-ca"
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homelab.io/restart-at: "2026-06-21T13-40"
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# The /-/health/{live,ready}/ endpoints do a DB round-trip; under transient
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# CNPG contention they respond in 5-6s while still returning 200. The chart's
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# default 3s liveness timeout then flags a working backend as dead and kubelet
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# kills it in a restart loop — the pod never stays Ready, gets dropped from the
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# authentik-server Service endpoints, and the OAuth-provisioning PostSync hook
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# fails with "Host is unreachable". Widen the timeouts so slow-but-healthy
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# checks aren't treated as failures. (Only these fields are overridden; the
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# chart deep-merges the rest of each probe, incl. the httpGet path.)
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livenessProbe:
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timeoutSeconds: 15
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failureThreshold: 6
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readinessProbe:
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timeoutSeconds: 15
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failureThreshold: 6
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startupProbe:
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timeoutSeconds: 15
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failureThreshold: 120 # 120 × 10s = 20min for fresh DB migrations
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# Every OIDC login (Grafana, Argo CD, MinIO, Forgejo) depends on this server —
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# its request latency/error rate explains SSO-driven slowness on those services.
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metrics:
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enabled: true
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serviceMonitor:
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enabled: true
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scrapeTimeout: 30s
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# ── Authentik worker ──────────────────────────────────────────────────────────
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# Runs background tasks: email delivery, LDAP sync, flow policy evaluation,
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# event log cleanup, and managed outpost updates. Stateless — no PVC needed.
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# Same resource profile as server; Authentik 2023+ merged some worker duties
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# into the server process but the worker pod is still required.
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worker:
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replicas: 1
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envFrom:
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- secretRef:
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name: authentik-secrets
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deploymentStrategy:
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type: Recreate
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resources:
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requests:
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cpu: 100m
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memory: 512Mi
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limits:
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cpu: 1000m
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memory: 1Gi
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tolerations:
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- key: node-role.kubernetes.io/control-plane
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operator: Exists
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effect: NoSchedule
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volumes: *caVolumes
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volumeMounts: *caVolumeMounts
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initContainers: *caInitContainers
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env:
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# Merge CA trust env vars
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- name: REQUESTS_CA_BUNDLE
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value: /merged/ca-bundle.crt
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- name: SSL_CERT_FILE
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value: /merged/ca-bundle.crt
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# Override database credentials to use 'app' from authentik-db-app
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- name: AUTHENTIK_POSTGRESQL__USER
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valueFrom:
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secretKeyRef:
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name: authentik-db-app
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key: username
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- name: AUTHENTIK_POSTGRESQL__PASSWORD
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valueFrom:
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secretKeyRef:
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name: authentik-db-app
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key: password
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podAnnotations:
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configmap.reloader.stakater.com/reload: "homelab-ca"
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homelab.io/restart-at: "2026-06-21T13-40"
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metrics:
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enabled: true
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serviceMonitor:
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enabled: true
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scrapeTimeout: 30s
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# ── PostgreSQL (external: CloudNativePG cluster in ddb namespace) ─────────────
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# Authentik connects to the dedicated authentik-db (1 primary + 2 replicas).
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# Do not use the bundled Bitnami subchart — CNPG is already running.
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postgresql:
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enabled: false
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primary:
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persistence:
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enabled: true
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storageClass: longhorn
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size: 8Gi
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tolerations:
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- key: node-role.kubernetes.io/control-plane
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operator: Exists
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effect: NoSchedule
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affinity:
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nodeAffinity:
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preferredDuringSchedulingIgnoredDuringExecution:
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- weight: 100
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preference:
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matchExpressions:
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- key: node-role.kubernetes.io/worker
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operator: Exists
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# ── Bundled Redis ─────────────────────────────────────────────────────────────
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# Cache and async task queue only — no durable data. If Redis restarts, in-flight
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# background tasks are retried and cached tokens are recomputed. Losing Redis
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# data does not lose user accounts or flow configuration (that's in PostgreSQL).
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# persistence: false saves a PVC and makes restarts faster.
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#
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# Same prefer-worker / fallback-to-cp scheduling as PostgreSQL.
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# architecture: standalone — no Sentinel/cluster overhead for a 3-node homelab.
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redis:
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enabled: true
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master:
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persistence:
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enabled: false
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tolerations:
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- key: node-role.kubernetes.io/control-plane
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operator: Exists
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effect: NoSchedule
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affinity:
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nodeAffinity:
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preferredDuringSchedulingIgnoredDuringExecution:
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- weight: 100
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preference:
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matchExpressions:
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- key: node-role.kubernetes.io/worker
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operator: Exists
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architecture: standalone
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# Ingress disabled — rule lives in k8s/ingress/ingress.yaml (authentik.riotpiao.com).
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# For direct access during bootstrap: kubectl -n iam port-forward svc/authentik-server 7000:80
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