Files
home-network-k3s-impl/apps/wave-1/nextcloud.yaml
T
jakman85andClaude Opus 5 82aff4d053 feat(apps): attach the media library and the legacy Nextcloud dataset over NFS
plex, sonarr, radarr and nextcloud each gain one bulk volume. Authored in the catalog and
re-rendered, never hand-edited into apps/ (render-golden: 10/10). Layout, the export change the
operator must apply, the uid analysis and the validation probes are in docs/BULK-NFS-STORAGE.md;
everything there was measured on the host over read-only SSH, not assumed.

WHAT THE LAYOUT TURNED OUT TO BE, AND WHY IT DECIDED THE DESIGN
/mnt/Storage/plex holds movies/ tv/ photos/ AND downloads/ as SIBLINGS in one dataset — so the
arrs' import source and their libraries are one filesystem on the server, and the download client's
completed folders are already named radarr/ and tv-sonarr/. The k3s arrs are joining a tree an arr
stack has been driving for a long time.

That sibling fact is the whole argument for the arrs mounting the export ROOT rather than a
subPath per directory. Sonarr and Radarr import by hardlinking or atomically renaming, both
same-filesystem operations, and to the kernel "same filesystem" means SAME MOUNT. Two subPath
mounts of one export are two mounts: link() across them returns EXDEV regardless of what the
server knows, and the arrs do not fail loudly — they degrade to copy-then-delete, rewriting every
file over NFS and destroying the seeding copy. The smallest subtree containing both tv/ and
downloads/ IS the export root, so the root mount is the MINIMAL mount that preserves hardlinks.
Least privilege bounded below by a hard requirement. The cost is stated, not hidden: sonarr can
also write /media/movies.

  plex       /mnt/Storage/plex      -> /media                 ro   ReadOnlyMany
  sonarr     /mnt/Storage/plex      -> /media                 rw   ReadWriteMany
  radarr     /mnt/Storage/plex      -> /media                 rw   ReadWriteMany
  nextcloud  /mnt/Storage/nextcloud -> /mnt/legacy-nextcloud  ro   ReadOnlyMany  (subPath: nextcloud)

Plex is read-only because it indexes and streams; every write on that tree belongs to the arrs, and
saying so removes Plex from the set of things that can damage 8.33 T. All three media consumers use
the SAME mountPath deliberately: when qbittorrent is eventually given this export, the arrs and the
download client will already agree on absolute paths, which is the other precondition for hardlinked
imports.

*** /media AND NOT /data — A COLLISION CAUGHT WHILE RENDERING. *** The arrs' Longhorn config PVC
renders at the renderer default /data/config. A media mount at /data is mounted OVER it and MASKS
the config volume: the pod comes up with its app database shadowed by an 8 T media tree. That
discovery also exposed a SEPARATE PRE-EXISTING BUG, reported and deliberately NOT fixed here:
LinuxServer arr images run with -data=/config, so /data/config is very likely the wrong home for
that PVC and the app has been writing its EPHEMERAL layer — the exact failure catalog/plex.yaml's
mountPath comment records already having been bitten by. Plex was fixed; sonarr, radarr, qbittorrent
and jackett were not. Fixing it starts those apps from an empty config volume, so it needs its own
change with the operator present. This change does not make it worse.

UID/GID — THE FAILURE THIS TIER ALWAYS HAS
The export is sec=sys + no_root_squash, so the client's numeric uid passes through verbatim and the
server's ownership is the entire access story. The tree is 0755 owned 1000:3000, so ONLY uid 1000
can write it. LinuxServer images default to 911. Without intervention sonarr and radarr would have
mounted cleanly, gone Ready, and failed EVERY import with EACCES.

And fsGroup cannot fix that — the in-tree NFS plugin does NO ownership management, so
podSecurityContext.fsGroup is a no-op on an NFS volume. Reaching for it is how this gets
misdiagnosed. So PUID=1000/PGID=3000 are added to both arrs (PGID 3000 keeps what they write
group-readable to the live non-k3s consumers of the same export), and fsGroup: 3000 is added for
the LONGHORN config PVC only, so changing PUID does not depend on the image re-chowning /config.
plex already runs as 1000 and reads a 0755 tree; nextcloud reads as www-data. Neither needs work.

NEXTCLOUD IS MOUNTED READ-ONLY, WHICH IS A DEVIATION FROM THE BRIEF — ON EVIDENCE
The task said nextcloud writes. The dataset says otherwise: of 270 G, 267 G is config_backup/, the
rest is config/ (103 M) and config_old/ (3.4 G). There is NO data/ directory. This is the OLD
non-k3s instance's configuration plus a backup blob — an archive — and that instance is STILL LIVE
on it (exported rw to 192.168.1.6 and .5, which the operator has said must stay active). Two
Nextclouds writing one instance's config directory, each with its own database and therefore its own
oc_filecache, is unrecoverable corruption. "Do not grant more than needed" lands on ro, and ro is
the trivially reversible choice. If the intent is in fact a MIGRATION, that is a larger and more
deliberate change than a mount; the one-line flip is documented.

Read-only for nextcloud can additionally be enforced SERVER-side (only nextcloud consumes that
dataset from k3s), and the sharenfs value in the doc uses ro= for the k3s clients. The media tree
cannot: plex and the arrs may land on any node, so the server sees the same addresses for reader
and writers. Plex's ro is therefore a client-side guarantee — stated as a limitation, not left
implied.

Co-Authored-By: Claude Opus 5 <[email protected]>
2026-09-07 23:54:13 -05:00

335 lines
17 KiB
YAML

---
# Namespace (trust zone; default-deny + policies apply)
apiVersion: v1
kind: Namespace
metadata:
name: nextcloud
labels:
homelab.keithjackson.dev/app-namespace: 'true'
gateway-access: shared
annotations:
homelab.keithjackson.dev/backup-policy: daily-offcluster
---
# Default-deny baseline (R-NET-01): deny all, allow only DNS
apiVersion: networking.k8s.io/v1
kind: NetworkPolicy
metadata:
name: default-deny
namespace: nextcloud
labels:
homelab.keithjackson.dev/baseline: default-deny
spec:
podSelector: {}
policyTypes:
- Ingress
- Egress
ingress: []
egress:
- to:
- namespaceSelector:
matchLabels:
kubernetes.io/metadata.name: kube-system
ports:
- protocol: UDP
port: 53
- protocol: TCP
port: 53
---
# PersistentVolume nextcloud-legacy-archive - static external NFS (bulk tier)
apiVersion: v1
kind: PersistentVolume
metadata:
name: nextcloud-legacy-archive
labels:
app.kubernetes.io/name: nextcloud
spec:
capacity:
storage: 270Gi
accessModes:
- ReadOnlyMany
persistentVolumeReclaimPolicy: Retain
storageClassName: ''
mountOptions:
- nfsvers=4.1
- hard
- noatime
- timeo=600
- retrans=2
nfs:
server: ${BULK_NFS_SERVER}
path: /mnt/Storage/nextcloud
readOnly: true
claimRef:
namespace: nextcloud
name: nextcloud-legacy-archive
---
# PVC nextcloud-data (R-STATE)
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: nextcloud-data
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
accessModes:
- ReadWriteOnce
storageClassName: longhorn
resources:
requests:
storage: 20Gi
---
# PVC nextcloud-legacy-archive (R-STATE)
apiVersion: v1
kind: PersistentVolumeClaim
metadata:
name: nextcloud-legacy-archive
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
accessModes:
- ReadOnlyMany
storageClassName: ''
volumeName: nextcloud-legacy-archive
resources:
requests:
storage: 270Gi
---
# Deployment (R-PLAT-02)
apiVersion: apps/v1
kind: Deployment
metadata:
name: nextcloud
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
replicas: 1
strategy:
type: Recreate
selector:
matchLabels:
app.kubernetes.io/name: nextcloud
template:
metadata:
labels:
app.kubernetes.io/name: nextcloud
homelab.keithjackson.dev/egress-class: internet
homelab.keithjackson.dev/auth-mode: oidc
annotations:
homelab.keithjackson.dev/auth-mode: oidc
homelab.keithjackson.dev/auth-groups: platform-admins
spec:
containers:
- name: nextcloud
image: nextcloud:31-apache
ports:
- containerPort: 80
env:
- name: POSTGRES_HOST
value: nextcloud-db-rw.nextcloud-db.svc.cluster.local
- name: POSTGRES_DB
value: nextcloud
- name: POSTGRES_USER
value: nextcloud
- name: POSTGRES_PASSWORD
valueFrom:
secretKeyRef:
name: nextcloud-bootstrap
key: db-password
- name: NEXTCLOUD_ADMIN_USER
valueFrom:
secretKeyRef:
name: nextcloud-bootstrap
key: admin-username
- name: NEXTCLOUD_ADMIN_PASSWORD
valueFrom:
secretKeyRef:
name: nextcloud-bootstrap
key: admin-password
- name: NEXTCLOUD_TRUSTED_DOMAINS
value: nextcloud.${BASE_DOMAIN}
- name: OVERWRITEHOST
value: nextcloud.${BASE_DOMAIN}
- name: OVERWRITEPROTOCOL
value: https
- name: OVERWRITECLIURL
value: https://nextcloud.${BASE_DOMAIN}
- name: NEXTCLOUD_OIDC_CLIENT_SECRET
valueFrom:
secretKeyRef:
name: nextcloud-bootstrap
key: oidc-client-secret
volumeMounts:
- name: data
mountPath: /var/www/html
- name: legacy-archive
mountPath: /mnt/legacy-nextcloud
subPath: nextcloud
readOnly: true
lifecycle:
postStart:
exec:
command:
- /bin/sh
- -c
- "# Idempotent Keycloak OIDC wiring (R-IDP-02/06). Runs alongside the nextcloud entrypoint\n# (which installs/upgrades on first boot). Installs+enables the user_oidc app and creates OR\n# updates the \"keycloak\" login provider (occ user_oidc:provider is create-or-update by\n# identifier). Auto-discovery pulls the realm's endpoints; the `groups` claim drives Nextcloud\n# group provisioning. occ runs as www-data (owns config.php); the client secret is passed via\n# --clientsecret-env so it never lands on a command line. Safe to re-run every start; a missing\n# secret or not-yet-installed instance is skipped so the pod never crashloops (the local\n# break-glass admin still works).\nset -u\n# OCC runs occ as www-data (owns config.php). NOTE: this wrapper word-splits its args via $*,\n# so it is used ONLY for single-token subcommands (status/app:list/app:install/...). The\n# provider call below carries a MULTI-WORD value (--scope 'openid email profile') and is run as\n# ONE su -c with the scope single-quoted, so the inner shell keeps it a single argument.\nOCC() { su -s /bin/sh www-data -c \"php /var/www/html/occ $*\"; }\nNEXTCLOUD_DISCOVERY_URL=https://keycloak.${BASE_DOMAIN}/realms/homelab/.well-known/openid-configuration\nnextcloud_oidc_fail() {\n echo \"[nextcloud-oidc] FAILED to configure 'keycloak' provider: $1\" >&2\n { echo \"$(date -u +%Y-%m-%dT%H:%M:%SZ) [nextcloud-oidc] FAILED: $1\"; } >> /var/www/html/nextcloud-oidc-bootstrap.log 2>/dev/null || true\n}\n# (a) Wait for the instance to be installed AND out of maintenance mode. The entrypoint holds\n# maintenance mode during first-boot install/upgrade; occ writes made in that window do not\n# stick \u2014 a second race on top of the quoting bug fixed at (c).\ni=0\nuntil OCC status 2>/dev/null | grep -q \"installed: true\" && ! OCC status 2>/dev/null | grep -q \"maintenance: true\"; do\n i=$((i + 1))\n [ \"$i\" -ge 300 ] && { echo \"[nextcloud-oidc] occ not ready (installed/maintenance) after wait; skipping\" >&2; exit 0; }\n sleep 2\ndone\n# Let Nextcloud's OWN server-side HTTP client reach the private-network IdP. The Keycloak\n# FQDN resolves (split-horizon) to the PRIVATE Cilium gateway VIP (RFC1918), and Nextcloud's\n# SSRF guard otherwise REFUSES that request \u2014 OCP\\Http\\Client\\LocalServerException \"violates\n# local access rules\" \u2014 during user_oidc's discovery/JWKS/token fetch AT LOGIN, surfacing to\n# the user as \"Could not reach the provider\". (The (b) curl check below uses system libcurl,\n# NOT this guard, so it passes while the browser login still failed.) Idempotent; re-applied\n# every start so it survives pod rolls / PVC rebuilds. Confirmed root cause 2026-08-27.\nOCC config:system:set allow_local_remote_servers --value=true --type=boolean >/dev/null 2>&1 \\\n || echo \"[nextcloud-oidc] WARN: failed to set allow_local_remote_servers\" >&2\n# NOTE the `$$` escape below \u2014 it is load-bearing. apps-wave-1 declares postBuild.\n# substituteFrom cluster-vars, so Flux envsubst rewrites this whole manifest at RECONCILE\n# time, before any container runs. Written unescaped, `$${NEXTCLOUD_OIDC_CLIENT_SECRET:-}` is\n# not a cluster-var, so envsubst blanked it and the guard reconciled as `[ -z \"\" ]` \u2014 ALWAYS\n# TRUE \u2014 so this hook `exit 0`d here on EVERY boot since 8738871 (2026-08-27), never\n# installing/enabling user_oidc nor registering the provider. SSO kept working only because\n# the provider was already in the DB; a PVC rebuild or fresh cluster would have come up with\n# NO OIDC at all. Flux STRICT substitution cannot catch this \u2014 it EXEMPTS default-operator\n# forms by design. `$${VAR}` is the escape: envsubst emits it back as a plain brace expansion\n# for the shell. Bare `$VAR` and `$(cmd)` are left alone and need NO escaping \u2014 which is why\n# `--clientsecret-env` and the bare uses below always worked and only the guard broke.\n# Contract: clusters/base/apps-vms.yaml. Enforced at render time by catalog/render.py.\nif [ -z \"$${NEXTCLOUD_OIDC_CLIENT_SECRET:-}\" ]; then\n echo \"[nextcloud-oidc]\
\ client secret unset; skipping OIDC (break-glass admin only)\"\n exit 0\nfi\nif ! OCC app:list 2>/dev/null | grep -q \"user_oidc\"; then\n OCC app:install user_oidc || echo \"[nextcloud-oidc] app:install user_oidc failed\" >&2\nfi\nOCC app:enable user_oidc >/dev/null 2>&1 || true\n# (b) Wait up to ~90s for the Keycloak discovery doc to be reachable (HTTP 200) before registering.\nd=0; disc_ok=0\nwhile [ \"$d\" -lt 45 ]; do\n if [ \"$(curl -sS -o /dev/null -w '%{http_code}' --max-time 5 \"$NEXTCLOUD_DISCOVERY_URL\" 2>/dev/null)\" = \"200\" ]; then\n disc_ok=1; break\n fi\n d=$((d + 1)); sleep 2\ndone\n[ \"$disc_ok\" = 1 ] || nextcloud_oidc_fail \"Keycloak discovery endpoint not reachable (HTTP 200) within timeout\"\n# (c) Configure (create-or-update by identifier) then VERIFY it persisted; retry the whole cycle.\n# HARDENED: run as ONE su -c so www-data's shell parses --scope='openid email profile' as a\n# single argument. The previous `OCC user_oidc:provider ... --scope=\"openid email profile\"`\n# form fed the value back through the wrapper's $*, which SPLIT it into extra positionals ->\n# occ \"Too many arguments\" -> silent failure on EVERY boot. Secret via --clientsecret-env\n# (never on argv). The verify-then-retry loop guarantees the provider actually persisted.\nr=0; reg_ok=0\nwhile [ \"$r\" -lt 10 ]; do\n su -s /bin/sh www-data -c \"php /var/www/html/occ user_oidc:provider keycloak \\\n --clientid=nextcloud \\\n --clientsecret-env=NEXTCLOUD_OIDC_CLIENT_SECRET \\\n --discoveryuri=$NEXTCLOUD_DISCOVERY_URL \\\n --scope='openid email profile' \\\n --unique-uid=0 \\\n --mapping-uid=preferred_username \\\n --mapping-email=email \\\n --mapping-display-name=name \\\n --group-provisioning=1 \\\n --mapping-groups=groups\" >/dev/null 2>&1 || true\n if OCC user_oidc:provider 2>/dev/null | grep -q \"keycloak\"; then\n reg_ok=1; break\n fi\n r=$((r + 1)); sleep 3\ndone\nif [ \"$reg_ok\" = 1 ]; then\n echo \"[nextcloud-oidc] provider 'keycloak' configured and verified\"\nelse\n nextcloud_oidc_fail \"user_oidc:provider ran but the provider did not persist after retries\"\nfi\n# (d) Promote Keycloak 'platform-admins' members to Nextcloud admins (#5). user_oidc 8.11 has\n# NO native group->admin mapping (occ user_oidc:provider offers group PROVISIONING and a\n# login WHITELIST only), so mirror the provisioned 'platform-admins' membership into the\n# built-in 'admin' group (the sole source of admin rights in Nextcloud). Idempotent every\n# start: occ group:adduser is a no-op for an existing member. A user is promotable only\n# AFTER their first OIDC login provisions them into the group, so a brand-new admin gains\n# rights on their next login + the following pod start (or run `occ group:adduser admin\n# <uid>` once). The LOCAL break-glass admin is unaffected (docs/15). The group name is\n# passed to php as argv (never interpolated) so group:list JSON parses robustly.\nADMIN_SRC_GROUP=platform-admins\n# HARDENED (verify-and-retry, like step (c)): the previous single pass ran `occ group:adduser`\n# exactly once with its output swallowed (>/dev/null 2>&1) and NO retry, so an early-boot\n# transient failure (DB / maintenance race in the first seconds after container start) silently\n# dropped the promotion until the NEXT pod restart. This loop re-reads group:list and re-adds\n# any platform-admins member still missing from 'admin' until all are verified (bounded ~30s);\n# it is a no-op for members already in 'admin'. Group names are passed to php as argv (never\n# interpolated) so the JSON parses robustly.\nparse_group() { su -s /bin/sh www-data -c \"php /var/www/html/occ group:list --output=json\" 2>/dev/null | php -r '$d=json_decode(stream_get_contents(STDIN),true);$g=$argv[1];if(is_array($d)&&!empty($d[$g])&&is_array($d[$g])){foreach($d[$g] as $u){echo $u,\"\\n\";}}' -- \"$1\" 2>/dev/null; }\np=0\nwhile [ \"$p\" -lt 15 ]; do\n current_admins=$(parse_group admin)\n missing=0\n for uid in $(parse_group \"$ADMIN_SRC_GROUP\"\
); do\n if printf '%s\\n' \"$current_admins\" | grep -qxF -- \"$uid\"; then\n continue\n fi\n missing=1\n if OCC group:adduser admin \"$uid\" >/dev/null 2>&1; then\n echo \"[nextcloud-oidc] ensured '$uid' is a Nextcloud admin (member of $ADMIN_SRC_GROUP)\"\n fi\n done\n [ \"$missing\" = 0 ] && break\n p=$((p + 1)); sleep 2\ndone\nif [ \"$p\" -ge 15 ]; then\n nextcloud_oidc_fail \"could not promote all $ADMIN_SRC_GROUP members into 'admin' after retries\"\nfi\n# A postStart hook MUST exit 0. A non-zero exit makes the kubelet KILL the container\n# (FailedPostStartHook -> CrashLoopBackOff), which is exactly what happened on 2026-09-01:\n# the final statement used to be `[ \"$p\" -ge 15 ] && nextcloud_oidc_fail ...`, so on the\n# SUCCESS path the test returned 1 and became the script's exit status. That was latent for\n# as long as the OIDC guard above was dead code and exited 0 first; fixing the guard\n# exposed it immediately. Every failure path here logs loudly and writes a marker file and\n# deliberately does NOT crash the pod \u2014 the break-glass local admin must stay usable.\nexit 0\n"
volumes:
- name: data
persistentVolumeClaim:
claimName: nextcloud-data
- name: legacy-archive
persistentVolumeClaim:
claimName: nextcloud-legacy-archive
---
# Service
apiVersion: v1
kind: Service
metadata:
name: nextcloud
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
selector:
app.kubernetes.io/name: nextcloud
ports:
- name: port-80
port: 80
targetPort: 80
---
# CiliumNetworkPolicy egress allow (R-NET-02): nextcloud-allow-nextcloud-db-5432
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: nextcloud-allow-nextcloud-db-5432
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: nextcloud
egress:
- toEndpoints:
- matchLabels:
app.kubernetes.io/name: nextcloud-db
k8s:io.kubernetes.pod.namespace: nextcloud-db
toPorts:
- ports:
- port: '5432'
protocol: TCP
---
# CiliumNetworkPolicy gateway-ingress allow (R-NET-01/02): nextcloud-allow-gateway-ingress
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: nextcloud-allow-gateway-ingress
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: nextcloud
ingress:
- fromEntities:
- ingress
toPorts:
- ports:
- port: '80'
protocol: TCP
---
# CiliumNetworkPolicy world egress allow (egress class governs the path; R-NET-05): nextcloud-allow-internet-egress
apiVersion: cilium.io/v2
kind: CiliumNetworkPolicy
metadata:
name: nextcloud-allow-internet-egress
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
spec:
endpointSelector:
matchLabels:
app.kubernetes.io/name: nextcloud
egress:
- toEntities:
- world
- toEndpoints:
- matchLabels:
io.kubernetes.pod.namespace: keycloak
app: keycloak
---
# HTTPRoute nextcloud-80 (R-TLS/R-DNS)
apiVersion: gateway.networking.k8s.io/v1
kind: HTTPRoute
metadata:
name: nextcloud-80
namespace: nextcloud
labels:
app.kubernetes.io/name: nextcloud
annotations:
homelab.keithjackson.dev/auth-mode: oidc
homelab.keithjackson.dev/auth-groups: platform-admins
spec:
parentRefs:
- name: shared
namespace: gateway
sectionName: https
hostnames:
- nextcloud.${BASE_DOMAIN}
rules:
- matches:
- path:
type: PathPrefix
value: /
backendRefs:
- name: nextcloud
port: 80
---
# ServiceMonitor (R-OBS-01)
apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
name: nextcloud
namespace: nextcloud
labels:
release: kube-prometheus-stack
app.kubernetes.io/name: nextcloud
spec:
selector:
matchLabels:
app.kubernetes.io/name: nextcloud
namespaceSelector:
matchNames:
- nextcloud
endpoints:
- port: metrics
interval: 30s
---
# PrometheusRule SLI alerts (R-OBS-01)
apiVersion: monitoring.coreos.com/v1
kind: PrometheusRule
metadata:
name: nextcloud-slis
namespace: nextcloud
labels:
release: kube-prometheus-stack
app.kubernetes.io/name: nextcloud
spec:
groups:
- name: nextcloud.slis
rules:
- alert: nextcloud-down
expr: up{job="nextcloud"} == 0
for: 5m
labels:
severity: critical
service: nextcloud
annotations:
summary: nextcloud is down
description: 'nextcloud has been unreachable for 5m (SLI: up).'