jellyfin: back up the config PVC with a k8up Schedule

Protect the jellyfin-config PVC (library metadata, plugins, config XML)
with daily restic backups to the new Ceph RGW config-backup bucket.

- Add a k8up.io Schedule: daily backup (02:00), weekly prune (Sun 03:00,
  keep 14 daily/8 weekly/12 monthly) and weekly check (Sun 04:00)
- Source S3 creds from the cephrgw BucketAccess Secret and the restic
  repo password from Vault via a VaultStaticSecret (kv path
  kubernetes/namespace/jellyfin/default/k8up-restic)
- Add the namespace VaultAuth (default role/SA) VSO needs to sync it
- Mount the reflected vault-ca-cert into the restic pods so restic trusts
  the internal unkin.net CA on s3.ceph.unkin.net
- Wire the new files into the jellyfin kustomization

apps/base/jellyfin/kustomization.yaml

@@ -8,6 +8,9 @@ resources:
   - cnpg_pooler.yaml
   - cnpg_backup.yaml
   - cephrgw-config-backup.yaml
+  - vaultauth.yaml
+  - vaultstaticsecret.yaml
+  - schedule.yaml
   - pvc-config.yaml
   - pvc-transcode.yaml
   - pvc-media-tv.yaml

apps/base/jellyfin/schedule.yaml

@@ -0,0 +1,58 @@
+---
+# k8up Schedule: restic backups of the jellyfin-config PVC (library metadata,
+# plugins, config XML) to the dedicated Ceph RGW config-backup bucket. S3 creds
+# come from the cephrgw BucketAccess Secret (jellyfin-config-backup-s3); the
+# restic repo password comes from Vault via the jellyfin-k8up-restic Secret.
+#
+# s3.ceph.unkin.net presents the internal unkin.net CA, which the k8up/restic
+# image does not trust by default, so the reflected vault-ca-cert Secret is
+# mounted into every job pod and pointed at via backend.tlsOptions.caCert.
+apiVersion: k8up.io/v1
+kind: Schedule
+metadata:
+  name: jellyfin-config
+  namespace: jellyfin
+spec:
+  backend:
+    repoPasswordSecretRef:
+      name: jellyfin-k8up-restic
+      key: password
+    s3:
+      endpoint: https://s3.ceph.unkin.net
+      bucket: jellyfin-config-backup
+      accessKeyIDSecretRef:
+        name: jellyfin-config-backup-s3
+        key: AWS_ACCESS_KEY_ID
+      secretAccessKeySecretRef:
+        name: jellyfin-config-backup-s3
+        key: AWS_SECRET_ACCESS_KEY
+    tlsOptions:
+      caCert: /etc/k8up/ca/ca.crt
+    volumeMounts:
+      - name: vault-ca
+        mountPath: /etc/k8up/ca
+        readOnly: true
+  backup:
+    schedule: "0 2 * * *"
+    failedJobsHistoryLimit: 3
+    successfulJobsHistoryLimit: 3
+    volumes:
+      - name: vault-ca
+        secret:
+          secretName: vault-ca-cert
+  prune:
+    schedule: "0 3 * * 0"
+    retention:
+      keepDaily: 14
+      keepWeekly: 8
+      keepMonthly: 12
+    volumes:
+      - name: vault-ca
+        secret:
+          secretName: vault-ca-cert
+  check:
+    schedule: "0 4 * * 0"
+    volumes:
+      - name: vault-ca
+        secret:
+          secretName: vault-ca-cert

apps/base/jellyfin/vaultauth.yaml

@@ -0,0 +1,20 @@
+---
+apiVersion: secrets.hashicorp.com/v1beta1
+kind: VaultAuth
+metadata:
+  name: default
+  namespace: jellyfin
+  annotations:
+    argocd.argoproj.io/sync-wave: "0"
+spec:
+  allowedNamespaces:
+    - jellyfin
+  kubernetes:
+    audiences:
+      - vault
+    role: default
+    serviceAccount: default
+    tokenExpirationSeconds: 600
+  method: kubernetes
+  mount: k8s/au/syd1
+  vaultConnectionRef: vso-system/default

apps/base/jellyfin/vaultstaticsecret.yaml

@@ -0,0 +1,24 @@
+---
+# restic repository password for the k8up jellyfin-config backups. Seeded at
+# kv/kubernetes/namespace/jellyfin/default/k8up-restic (key: password); the
+# default k8s role's templated policy already grants read here, so no
+# terraform-vault change is needed. VSO syncs it into the jellyfin-k8up-restic
+# Secret that the Schedule references via backend.repoPasswordSecretRef.
+apiVersion: secrets.hashicorp.com/v1beta1
+kind: VaultStaticSecret
+metadata:
+  name: jellyfin-k8up-restic
+  namespace: jellyfin
+  annotations:
+    argocd.argoproj.io/sync-wave: "0"
+spec:
+  destination:
+    create: true
+    name: jellyfin-k8up-restic
+    overwrite: true
+  hmacSecretData: true
+  mount: kv
+  path: kubernetes/namespace/jellyfin/default/k8up-restic
+  refreshAfter: 5m
+  type: kv-v2
+  vaultAuthRef: default