home-network-k3s-impl/catalog/plex.yaml

# ServiceDefinition: plex
# Source of truth: spec docs/13-service-catalog.md, row 1 (the catalog's largest service).
# public | egress internet | config on Longhorn (metadata DB, DR-noncritical/reacquirable) |
# auth: native (Plex accounts, NOT Keycloak — docs/13 + docs/15 documented exception).
# Validates against schemas/servicedefinition.schema.json.
#
# BULK MEDIA — NOW ATTACHED (docs/04 bulk tier; the long-standing OQ-2 prerequisite, resolved for
# the STATIC case). The library is 8.33 T of ZFS on the Proxmox host at /mnt/Storage/plex, and it
# already exists: nothing is provisioned, an existing dataset is mounted. See
# docs/BULK-NFS-STORAGE.md for the layout, the export change and the uid analysis. (The bulk-tier
# requirement ID is deliberately still not typed here — see that document's "gate" note.)
name: plex
kind: container
source:
  image: plexinc/pms-docker:latest
# plexinc/pms-docker env. Rendered VERBATIM onto the app container by render.py (schema env list).
env:
  # PLEX_UID/PLEX_GID: the image boots as root (s6 PID1), chowns /config to this uid/gid, then drops
  # the "Plex Media Server" process to it. 1000 matches the Longhorn ownership convention the other
  # stateful apps use (seerr/semaphore run as UID/GID 1000), keeping the /config PVC writable by the
  # dropped plex user. (Plex has no podSecurityContext/fsGroup — the image manages ownership itself.)
  - name: PLEX_UID
    value: "1000"
  - name: PLEX_GID
    value: "1000"
  # TZ: no other service in the repo sets a timezone (repo-wide grep: none), so use the safe default.
  - name: TZ
    value: Etc/UTC
  # ALLOWED_NETWORKS marks these CIDRs as trusted LAN, so in-cluster clients (Seerr -> plex:32400) are
  # treated as local and NOT pushed onto Plex's remote-auth/relay path. 10.0.0.0/8 covers the Cilium
  # pod CIDR (10.0.0.0/16, CLUSTER_POD_CIDR — Seerr's pod is 10.0.x.x) and the k3s service net
  # (10.43.0.0/16); 192.168.0.0/16 covers the home LAN.
  - name: ALLOWED_NETWORKS
    value: 10.0.0.0/8,192.168.0.0/16
  # PLEX_CLAIM — the ONE-SHOT plex.tv server claim, sourced from the SOPS Secret `plex-claim`
  # (apps/wave-0/plex-claim-secret.sops.yaml, same wave => applied in the same reconcile as this
  # workload). Plex cannot create libraries over the mounted bulk share while the server is
  # UNCLAIMED, so this is wired; it was previously left out on the reasoning below, and only one
  # half of that reasoning survived contact with the upstream source.
  #
  # A SHORT TTL IS THE OPERATIONAL CONSTRAINT, not a reason to abstain. A https://plex.tv/claim token
  # expires in MINUTES — read the countdown the claim page renders; do not budget against a number
  # written in this tree. (This comment previously asserted "~4 minutes" as established fact. It was
  # UNCITED, upstream plexinc/pms-docker documents no expiry at all, and that number was load-bearing
  # for the whole procedure design — including a since-disproven claim that the delivery pipeline was
  # too slow to fit inside it. Measured 2026-09-29: the full loop is ~2m45s and fits.)
  #
  # The live token is injected by the operator inside that window, with an explicit `flux reconcile`
  # to collapse the wait. Scripted end to end as infra/plex/claim-ship.sh; runbooks/plex-claim.md is
  # the procedure. SERVER CLAIMED 2026-09-29 — this env is now a permanent no-op (see below), and the
  # committed value is the spent token from that claim rather than the original placeholder.
  #
  # ONE-SHOT, AND SAFE TO SIT HERE EXPIRED. Verified from plexinc/pms-docker's own first-run script
  # (branch `master`, root/etc/cont-init.d/40-plex-first-run, confirmed byte-identical to the file in
  # the running `:latest` image), NOT assumed:
  #   - the exchange (line 106) is guarded on TWO conditions: PLEX_CLAIM non-empty AND the
  #     PlexOnlineToken pref in /config empty. Once claimed, the block is SKIPPED — this env is a
  #     no-op on every subsequent start, whatever it holds. (Upstream README: "If server is already
  #     logged in, this parameter is ignored.") The claim itself persists on the /config PVC as before.
  #   - an invalid/expired token on a still-unclaimed /config gets a 403 with an empty body; curl's
  #     status is unchecked, the token `sed` yields "", the success branch at line 120 does not fire,
  #     there is no `else` and no `exit 1`, and the script (no `set -e`) exits 0. It comes up UNCLAIMED and
  #     SERVING — it does NOT crashloop. The image also leaves S6_BEHAVIOUR_IF_STAGE2_FAILS at its
  #     default 0, which continues startup even when a cont-init script fails.
  # So the earlier "a placeholder claim Secret would crashloop the pod" note was WRONG about the
  # placeholder; it was right only about an ABSENT Secret. secretKeyRef here has no `optional` field,
  # so the Secret must always exist in the Flux graph — which is why it is committed, encrypted, and
  # listed in apps/wave-0/kustomization.yaml rather than hand-created at claim time. No schema change
  # is needed: `optional` would only matter if a missing Secret had to be tolerated, and it doesn't.
  - name: PLEX_CLAIM
    valueFrom:
      secretKeyRef:
        name: plex-claim
        key: PLEX_CLAIM
  # ADVERTISE_IP ("Custom server access URLs") — the ONE hostname this server publishes to plex.tv,
  # serving BOTH local and remote clients by split-horizon DNS (operator design, 2026-10-04):
  #   LAN    -> PiHole answers plex-vip.${BASE_DOMAIN} with ${PLEX_L4_VIP} (the tcp/32400 LoadBalancer
  #             in apps/wave-0/plex-remote.yaml). See catalog/pihole.yaml's split-horizon line, which
  #             needs a per-host override because the zone wildcard otherwise points at the GATEWAY
  #             VIP — measured 2026-10-04: plex-vip.${BASE_DOMAIN} resolved to the Gateway, where
  #             nothing listens on 32400.
  #   PUBLIC -> Cloudflare answers with the WAN address, NATed to the same VIP (off-repo).
  #
  # WHY A HOSTNAME AND NOT THE `plex.direct` FORM THIS BRIEFLY USED. The first fix for the
  # 2026-10-04 outage advertised `https://<dashed-ip>.<serverhash>.plex.direct:32400`, which works
  # (and is Plex's own mechanism), but it hard-codes BOTH the VIP and the server's certificate hash
  # into a cluster-var — two values nothing could keep in sync, with no alert if either drifted. A
  # hostname in our own zone removes that whole class of problem: ${BASE_DOMAIN} is already a knob,
  # the VIP lives only in PiHole's answer, and `PLEX_ADVERTISE_URL` is deleted outright.
  #
  # THIS IS `https`, WHICH ONLY WORKS BECAUSE WE HAND PLEX OUR OWN CERTIFICATE. Plex serves 32400
  # with its `*.<serverhash>.plex.direct` cert, which does NOT cover this name — advertising
  # `https://plex-vip...` against the stock cert reproduces the exact failure that caused the
  # outage (measured: a storm of `CERT: incomplete TLS handshake ... certificate unknown` from real
  # clients, and `curl` without `-k` failing to connect). The `lifecycle.postStart` hook below
  # installs the Let's Encrypt cert for this name and points Plex at it, so the advertised URL and
  # the served certificate agree. Do not change this to a bare IP, and do not drop the hook and
  # leave the `https` here.
  #
  # (A SAN match is not what makes Plex *work* — `httpsRequired=0` and `secureConnections` default
  # to Preferred, so clients can fall back to cleartext. It is what keeps the remote leg ENCRYPTED
  # instead of silently downgrading traffic that crosses the internet.)
  #
  # The image's /etc/cont-init.d/40-plex-first-run runs `setPref "customConnections"
  # "${ADVERTISE_IP}"` (line 127, verified in the running image), OUTSIDE the
  # PLEX_CLAIM/PlexOnlineToken guard, and its `/.firstRunComplete` marker is on the container
  # OVERLAY fs rather than the /config PVC — so this is re-applied on EVERY pod start and git, not
  # a web form, owns the value. Hand-typed custom URLs are what broke this service; they are now
  # overwritten on every start.
  - name: ADVERTISE_IP
    value: https://plex-vip.${BASE_DOMAIN}:32400
  # THE TLS MATERIAL FOR THE NAME ABOVE, as PEM text in env rather than a mounted volume.
  # `plex-vip-tls` is issued by cert-manager from ClusterIssuer `letsencrypt-prod` for exactly
  # `plex-vip.${BASE_DOMAIN}` (apps/wave-0/plex-cert.yaml, same wave => same reconcile as this
  # workload). The postStart hook converts it to the PKCS#12 bundle Plex requires.
  #
  # WHY ENV AND NOT A VOLUME, which would be the conventional choice. MEASURED 2026-10-04:
  # `schemas/servicedefinition.schema.json` `storage` accepts only
  # [class, export, mountPath, name, readOnly, size, subPath] with `additionalProperties: false`,
  # `catalog/render.py` emits NO secret volumes, and no rendered app mounts a Secret as a volume.
  # Mounting one therefore needs a schema + renderer change; `env.valueFrom.secretKeyRef` is
  # already in the schema and already used by PLEX_CLAIM above. PEM is text, so it survives an env
  # var intact (a raw PKCS#12 would not — it is binary and carries NUL bytes).
  #
  # COST, STATED PLAINLY: the private key is readable from this container's environment
  # (/proc/1/environ, `kubectl exec env`) by anything that can already exec into the pod. That is
  # the same audience that can read the converted bundle under /config, so the marginal exposure is
  # small — but a secret VOLUME would still be the better shape, and adding secret-volume support
  # to the schema is the clean follow-up that removes this note.
  #
  # `optional: true` IS LOAD-BEARING, NOT DEFENSIVE CLUTTER (schema 1.11.0, added for this). The
  # Certificate is issued INTO THIS NAMESPACE, and the namespace is created by the rendered
  # apps/wave-0/plex.yaml itself — so the cert CANNOT be issued in an earlier tier, and the
  # Certificate and this Deployment land in the SAME reconcile. On a cold bootstrap the Secret is
  # therefore briefly absent while cert-manager completes a DNS01 challenge. With a HARD ref, Plex
  # would sit in CreateContainerConfigError until a certificate issued — and because `apps-wave-0`
  # is `wait: true` with `apps-wave-1` dependsOn it, a failed or slow issuance would STALL THE WHOLE
  # APP TIER (the same hazard the `hardware` block below documents for the GPU resource). Optional
  # instead means: no cert -> Plex still starts and serves, the postStart hook logs that the
  # certificate was not installed, and the next start after issuance converges. Plex falls back to
  # its own `*.plex.direct` certificate in the meantime, so the degraded state is "advertised URL
  # not yet servable over TLS", not "media server down".
  - name: PLEX_TLS_CRT
    valueFrom:
      secretKeyRef:
        name: plex-vip-tls
        key: tls.crt
        optional: true
  - name: PLEX_TLS_KEY
    valueFrom:
      secretKeyRef:
        name: plex-vip-tls
        key: tls.key
        optional: true
lifecycle:
  # LEVEL-TRIGGERED PLEX SETTINGS, re-asserted on EVERY container start — the same pattern and the
  # same reasoning as catalog/pihole.yaml's and catalog/qbittorrent.yaml's postStart: desired state
  # lives in git and is re-asserted unconditionally rather than typed into a web form once. Typing
  # settings into the web form is precisely what took this service down on 2026-10-04.
  #
  # IT EXISTS BECAUSE THE IMAGE HAS NO ENV FOR THESE SETTINGS. Measured 2026-10-04 across the whole
  # init surface (/etc/cont-init.d, /etc/services.d, /plex-common.sh, /usr/local/bin): the image
  # calls setPref for exactly SIX prefs — MachineIdentifier, ProcessedMachineIdentifier,
  # PlexOnlineToken, customConnections, allowedNetworks, TranscoderTempDirectory — and supports NO
  # generic PLEX_PREFERENCE* hook of any kind. The two things we need (a LAN definition and a custom
  # certificate) are reachable ONLY through Plex's own API, so this hook is the only GitOps path.
  #
  # IT MUST NEVER FAIL. A postStart hook that exits non-zero makes kubelet KILL the container, so
  # every step is bounded and the script ends with an unconditional `exit 0`. A missing token, an
  # unissued certificate or an unreachable API degrades to "not applied this start" and is retried
  # on the next one; it never crashloops Plex.
  postStart:
    exec:
      command:
        - /bin/bash
        - -c
        - |
          # NOTE — LOAD-BEARING: SHELL VARIABLES HERE ARE WRITTEN BARE, NEVER BRACE-WRAPPED.
          # This whole script is rewritten by Flux postBuild envsubst BEFORE it ever runs, so a
          # brace-wrapped name is read as a cluster-vars knob: an undeclared one is a HARD
          # Kustomization failure under StrictPostBuildSubstitutions, and a declared one would be
          # replaced with its value. Shell vars are therefore `$PX`, `$TOKEN`, `$P12` — bare. Only
          # BASE_DOMAIN below is brace-wrapped, because it IS a knob and IS meant to be
          # substituted. Command substitution `$(cmd)` is left alone and needs no escaping. A shell
          # variable written with braces would be blanked or would fail the whole Kustomization —
          # this repo has already lost a gitea OIDC bootstrap to exactly that mistake, and
          # catalog/render.py now refuses to emit it (which is how this very comment got caught).
          # DELIBERATELY NO `set -u`. The TLS env vars are declared `optional: true`, so when the
          # certificate has not issued yet they are genuinely UNSET, not empty — and under `set -u`
          # the first `[ -n "$PLEX_TLS_CRT" ]` would abort the script, which for a postStart hook
          # means kubelet KILLS THE CONTAINER. That is the precise failure the `optional` flag exists
          # to prevent, so turning it back on here would defeat the whole design. (The alternative,
          # a brace-wrapped `:-` default, would need envsubst escaping — the trap the note above
          # describes.) Every value below is explicitly guarded instead.
          PX="/config/Library/Application Support/Plex Media Server/Preferences.xml"
          CERTDIR=/config/certs
          P12=$CERTDIR/plex-vip.p12
          # The PKCS#12 passphrase protects nothing and is deliberately not a secret: Plex needs it
          # in cleartext in customCertificateKey, and it and the bundle sit on the same PVC. It is a
          # container-format requirement, not an access control.
          P12PASS=plexvip
          LANNETS='10.0.0.0/8,192.168.0.0/16'
          CERTDOMAIN=plex-vip.${BASE_DOMAIN}
          API=http://127.0.0.1:32400

          # (1) Build the PKCS#12 bundle from the PEM the Secret supplies. Rebuilt on every start so
          # a cert-manager RENEWAL is picked up with no extra moving part.
          if [ -n "$PLEX_TLS_CRT" ] && [ -n "$PLEX_TLS_KEY" ]; then
            mkdir -p $CERTDIR && chmod 700 $CERTDIR
            printf '%s' "$PLEX_TLS_CRT" > $CERTDIR/tls.crt
            printf '%s' "$PLEX_TLS_KEY" > $CERTDIR/tls.key
            chmod 600 $CERTDIR/tls.key
            if openssl pkcs12 -export -out $P12.tmp -inkey $CERTDIR/tls.key \
                 -in $CERTDIR/tls.crt -passout pass:$P12PASS 2>/dev/null; then
              mv -f $P12.tmp $P12
              chown 1000:1000 $P12 2>/dev/null || true
              chmod 600 $P12
              echo "[plex-settings] PKCS#12 bundle written"
            else
              rm -f $P12.tmp
              echo "[plex-settings] WARN: pkcs12 export failed; keeping any previous bundle" >&2
            fi
            rm -f $CERTDIR/tls.key
          else
            echo "[plex-settings] WARN: TLS env empty; certificate not installed this start" >&2
          fi

          # (2) Wait, bounded (~90s), for the local API. /identity needs no auth.
          i=0
          while [ "$i" -lt 45 ]; do
            if [ "$(curl -s -o /dev/null -w '%{http_code}' --max-time 5 $API/identity 2>/dev/null)" = "200" ]; then
              break
            fi
            i=$(expr $i + 1); sleep 2
          done

          # (3) The prefs API needs the server token. It already lives in Preferences.xml on this
          # PVC; it is never echoed here, and Plex redacts tokens in its own request log. An
          # UNCLAIMED server has none — a normal state on a fresh /config — so skip, do not fail.
          TOKEN=$(grep -o 'PlexOnlineToken="[^"]*"' "$PX" 2>/dev/null | head -1 | cut -d'"' -f2)
          if [ -z "$TOKEN" ]; then
            echo "[plex-settings] not claimed yet — skipping prefs, will retry next start" >&2
            exit 0
          fi

          # Percent-encode what our values actually contain. Plex takes prefs as QUERY parameters on
          # a PUT, so a raw '/' or ',' would be read as structure rather than data.
          enc() {
            printf '%s' "$1" | sed -e 's|%|%25|g' -e 's|/|%2F|g' -e 's|,|%2C|g' \
                                   -e 's|:|%3A|g' -e 's| |%20|g'
          }
          setpref() {
            code=$(curl -s -o /dev/null -w '%{http_code}' --max-time 10 -X PUT \
              -H "X-Plex-Token: $TOKEN" "$API/:/prefs?$1=$(enc "$2")" 2>/dev/null)
            if [ "$code" = "200" ]; then
              echo "[plex-settings] set $1"
            else
              echo "[plex-settings] WARN: $1 -> HTTP $code" >&2
            fi
          }

          # (4) THE LAN DEFINITION — the reason this hook was written. Without it Plex has NO notion
          # of a local network and tags EVERY client remote. Measured 2026-10-04: 468 requests
          # logged "Allowed Network (WAN)" and ZERO "(LAN)", including Seerr from inside the
          # cluster, which is why the server showed as Remote to LAN clients. Note allowedNetworks
          # (the ALLOWED_NETWORKS env) only waives AUTH — it does NOT make a client local. Two
          # different settings; only one of them has an env hook.
          setpref LanNetworksBandwidth "$LANNETS"

          # (5) THE CERTIFICATE, which is what makes the `https` in ADVERTISE_IP servable. Set only
          # if the bundle exists — pointing Plex at a missing file would break its TLS listener.
          if [ -s "$P12" ]; then
            setpref customCertificatePath "$P12"
            setpref customCertificateKey "$P12PASS"
            setpref customCertificateDomain "$CERTDOMAIN"
          else
            echo "[plex-settings] WARN: no bundle; leaving certificate prefs untouched" >&2
          fi
          exit 0
# HARDWARE TRANSCODING — the host iGPU's render device (schema 1.8.0 `hardware`; R-PLAT-02).
# INTENT ONLY, AND THE MECHANISM DELIBERATELY DOES NOT LIVE HERE. This says "this workload needs an
# Intel Quick Sync render device"; it does NOT name a device path and it does NOT name a resource.
# How the platform hands the device over is `catalog/render.py`'s business and is documented in
# `schemas/renderer-contract.md` `### hardware` — read that for the mechanism, never this comment.
# The payoff is proven, not theoretical: on 2026-10-01 the mechanism was swapped outright (hostPath
# -> Intel GPU device plugin extended resource) and THIS BLOCK DID NOT MOVE — a `render.py` change
# plus a re-render, zero catalog edits. Do not "simplify" it into a raw `/dev/...` path; that is the
# whole point of the enum.
#
# THE DEVICE IS PRESENT ON EVERY PROD NODE, so nothing had to be installed and Plex can land
# anywhere. Measured on all three nodes 2026-09-30: `/dev/dri/renderD128` present, `root:render`,
# GID 992, mode 0660, driver `i915` bound (NOT `xe`), UHD Graphics 630 on an i7-9700T, media engines
# `vcs0`/`vecs0` live, iGPU enabled in BIOS on each. Measured again 2026-10-01, one layer up: all
# three nodes advertise `gpu.intel.com/i915: 1` in `.status.allocatable`. This field renders no
# nodeSelector; placement is a separate concern with its own justification.
#
# PLEX'S SCHEDULABILITY IS NOW COUPLED TO THE `intel-gpu-plugin` DaemonSet, and that is a real cost,
# not a footnote. The current mechanism is a hard scheduling constraint: if the resource is
# unavailable (plugin broken, removed, or not yet reconciled) this pod is UNSCHEDULABLE, and because
# `apps-wave-0` is `wait: true` with `apps-wave-1` `dependsOn` it, that STALLS THE WHOLE APP TIER.
# The previous hostPath mechanism degraded silently to software transcoding instead — but it never
# actually granted access (device-cgroup EPERM, measured 2026-10-01), so there was nothing to keep.
# THE ESCAPE HATCH IS THIS BLOCK: delete these two lines and re-render, and Plex goes back to
# software transcoding and the tier unblocks. One field, no code change. `runbooks/plex-quicksync.md`
# carries that procedure for whoever needs it at 2am.
#
# NO `podSecurityContext.supplementalGroups`, AND ADDING ONE WOULD BE INERT — do not "fix" this.
# The device is `root:render` 0660 and this process is uid/gid 1000, so the obvious move is to push
# the host `render` GID in as a supplemental group. It cannot work here, and this survived the
# mechanism swap unchanged. MEASURED IN THE RUNNING CONTAINER, 2026-09-30 and again 2026-10-01: the
# image's own `/etc/cont-init.d/45-plex-hw-transcode-and-connected-tuner` stats every char device
# under `/dev/dri`, `groupadd`s a matching group INSIDE the container when none exists, and
# `usermod -a -G`s the `plex` user into it — every start, nothing hardcoded, which also makes a host
# GID renumbering self-healing (no GID is pinned anywhere in this repo) and which works the same way
# on a PLUGIN-INJECTED device as on a bind-mounted one. Measured live, `Plex Media Server` ran with
# `Groups: 44 100 992 1000` — 992 IS the host `render` GID, i.e. the hook had already done the job.
# The service execs via `s6-setuidgid plex`, and `s6-setuidgid` REPLACES the process group list from
# `/etc/group` rather than appending to it, so root's gid `0` — which PID 1 (`s6-svscan`) does hold —
# is GONE, and anything Kubernetes supplies reaches s6-svscan and is discarded before Plex ever
# starts. The group is the image's job and it does it correctly. `render.py --selftest` asserts the
# ABSENCE of a pod securityContext for this field precisely so nobody adds an inert one back later.
#
# THE LAST MILE IS A MANUAL OPERATOR STEP AND CANNOT LIVE IN THIS REPO. Handing over the device does
# not enable hardware transcoding — Plex's own `HardwareAcceleratedCodecs` preference does, and it
# is ABSENT from `Preferences.xml` today (the toggle has never been on). NO environment variable can
# set it: a grep of the running image's entire init surface (`/etc/cont-init.d`, `/etc/services.d`,
# `/etc/fix-attrs.d`, `/plex-common.sh`, `/usr/local/bin`) found ZERO `PLEX_PREFERENCE*` support,
# and the six prefs the image does write (`MachineIdentifier`, `ProcessedMachineIdentifier`,
# `PlexOnlineToken`, `customConnections`, `allowedNetworks`, `TranscoderTempDirectory`) are all
# unrelated. So there is no GitOps path to the toggle; an operator clicks it once in the web UI.
# `runbooks/plex-quicksync.md` is that procedure, plus how to verify it took.
hardware:
  gpu: intel-quicksync
exposure: public              # edge port-forward + public DNS; clients + Seerr reach it (docs/09; R-DNS/R-NET)
egress: internet              # normal WAN egress (docs/03; R-NET-05)
storage:
  - name: config
    size: 8Gi
    class: longhorn           # Plex DB/metadata: replicated app state on the 3-replica tier (docs/04; R-STATE-01/02)
    mountPath: /config        # plexinc/pms-docker writes its identity/claim + "Library" DB under /config, NOT the
                              # renderer default /data/config. Without this the PVC sat unused and Plex wrote to the
                              # container's EPHEMERAL layer -> unclaimed + all state lost on restart. The image inits as
                              # root (s6-svscan PID 1), chowns /config to the plex user, then drops -> no fsGroup needed
                              # (verified in-cluster: PID1=root, "Plex Media Server"=plex). Persisting /config here also
                              # makes the claim survive restarts once claimed — which is what makes the PLEX_CLAIM env
                              # above a ONE-SHOT: the token is exchanged for a PlexOnlineToken written here, and the
                              # exchange is then skipped on every later start. (The older note here claimed a
                              # placeholder claim Secret "would crashloop the pod"; upstream's first-run script says
                              # otherwise — see the PLEX_CLAIM comment in `env` above. An ABSENT Secret is the hard
                              # failure, and that is why one is committed.)
  # THE LIBRARY (docs/04 bulk tier). One READ-ONLY mount of the export ROOT, giving /media/movies,
  # /media/tv and /media/photos — the whole tree the layout actually has (`ls /mnt/Storage/plex`:
  # downloads/ movies/ photos/ tv/).
  #
  # WHY THE ROOT AND NOT THREE subPath MOUNTS. Nothing is gained by narrowing: the mount is `ro`,
  # so no subPath could remove a privilege that matters, while three mounts would triple the NFS
  # mounts per pod and mean a manifest change every time a top-level library is added.
  #
  # WHY READ-ONLY, when the export is `rw` and the other consumers write. Plex is a SERVER: it
  # indexes and streams. Every write on that tree belongs to Sonarr and Radarr. Marking it here
  # costs nothing and removes Plex from the set of things that can damage 8.33 T. Enforced by the
  # PV's nfs.readOnly (a real `ro` mount), not only by the volumeMount flag.
  #
  # UID: no change needed. The tree is 0755 owned 1000:3000 throughout, so it is world-readable and
  # world-traversable, and PLEX_UID/PLEX_GID above already make the process uid 1000 in any case.
  # (fsGroup would have been a no-op here regardless — the in-tree NFS plugin does no ownership
  # management. That is the trap the arrs' PUID/PGID exists to avoid; Plex never hits it.)
  - name: media
    class: bulk
    export: /mnt/Storage/plex   # the ZFS dataset Storage/plex, on ${BULK_NFS_SERVER}
    mountPath: /media
    readOnly: true
    size: 9Ti                   # ADVISORY ONLY (nothing enforces a static NFS PV's capacity): the
                                # dataset's 8.33 T used, rounded up, so `kubectl get pv` reports
                                # something true. The real limit is the ZFS pool.
dependencies: []              # default-deny: reaches only DNS; clients/Seerr reach IT (docs/03; R-NET-01/02)
ingressRoutes:
  - host: plex.${BASE_DOMAIN}
    port: 32400               # Plex web UI + API served on 32400 (wildcard TLS at the Gateway; docs/08/09)
auth:
  mode: native                # Plex account auth — documented exception, NOT Keycloak (docs/13/15; R-IDP-02)
update:
  channel: stable             # R-UPD-01 (never pre-release)
  range: ">=1.40.0"           # acceptable versions (advisory; image-automation off during onboarding)
  cadence: "0 4 * * 0"        # weekly stable check/apply
  autoRollbackOnFailedHealth: true   # R-UPD-03
observability:
  metrics: true
  slis:
    - up                      # R-OBS-01: service-down alert
backup:
  # The config volume is on the longhorn (replicated, "irreplaceable") tier, so the L0 Kyverno
  # backup policy (R-STATE-03) forbids `reacquirable` here — it must reference an off-cluster
  # schedule. Plex's metadata DB (library index, thumbnails, watch state) is expensive to rebuild,
  # so it is backed up off-cluster. The bulk library itself, once attached, is the `reacquirable`
  # part (docs/04) and is NOT covered by this schedule.
  policy: daily-offcluster    # off-cluster backup of the longhorn config volume (docs/04; R-STATE-03)