fix for nfs-photo not exporting root dir

clusters/base/apps/nfs-photo/helmrelease.yaml

@@ -25,14 +25,6 @@ spec:
               - sh
               - -c
               - chmod -R a+rwX /disks/base /disks/sub1
-          mtab-setup:
-            image:
-              repository: hectorm/nfs-ganesha
-              tag: v10
-            command:
-              - sh
-              - -c
-              - cat /proc/self/mounts > /mtab-vol/mtab
           # native sidecar (restartPolicy: Always): mounts the two disks and
           # exposes their union at /disks/merged via FUSE. It must be up and
           # actually mounted *before* the "app" container is created, since
@@ -46,7 +38,6 @@ spec:
           mergerfs:
             dependsOn:
               - fix-permissions
-              - mtab-setup
             restartPolicy: Always
             image:
               repository: ghcr.io/hotio/mergerfs
@@ -77,6 +68,24 @@ spec:
                 memory: 64Mi
               limits:
                 memory: 512Mi
+          # runs after mergerfs is confirmed mounted (see dependsOn) and has
+          # /export mounted too, so the /proc/self/mounts snapshot it takes
+          # actually includes the fuse.mergerfs line for /export. ganesha's
+          # FSAL_VFS resolves export paths against this frozen /etc/mtab, not
+          # the live /proc/mounts - if /export is missing from it (e.g. this
+          # ran before mergerfs, or without /export mounted at all), ganesha
+          # fails at startup with "resolve_posix_filesystem(/export) ...
+          # No such file or directory" even though /export is mounted fine.
+          mtab-setup:
+            dependsOn:
+              - mergerfs
+            image:
+              repository: hectorm/nfs-ganesha
+              tag: v10
+            command:
+              - sh
+              - -c
+              - cat /proc/self/mounts > /mtab-vol/mtab
         containers:
           app:
             image:
@@ -141,7 +150,7 @@ spec:
         type: persistentVolumeClaim
         accessMode: ReadWriteOnce
         size: 100Gi
-        storageClass: longhorn
+        storageClass: longhorn-single-replica
         retain: true
         advancedMounts:
           app:
@@ -153,7 +162,7 @@ spec:
         type: persistentVolumeClaim
         accessMode: ReadWriteOnce
         size: 100Gi
-        storageClass: longhorn
+        storageClass: longhorn-single-replica
         retain: true
         advancedMounts:
           app:
@@ -171,6 +180,9 @@ spec:
             app:
               - path: /export
                 mountPropagation: HostToContainer
+            mtab-setup:
+              - path: /export
+                mountPropagation: HostToContainer
       dev-fuse:
         type: hostPath
         hostPath: /dev/fuse