cfs: add fabrics.cfg to observed files

In a previous commit we already added the openfabric / ospf
configuration files, but the configuration format changed since then,
so we replace them with the single configuration file used by the
fabrics now.

Also add a postinst script that removes the leftover folder from that
change.

Signed-off-by: Stefan Hanreich <s.hanreich@proxmox.com>
Link: https://lore.proxmox.com/20250716130837.585796-34-g.goller@proxmox.com

debian/pve-cluster.postinst

@@ -0,0 +1,24 @@
+#!/bin/sh
+
+set -e
+
+remove_fabrics_directory() {
+  LEGACY_FABRICS_DIRECTORY="/etc/pve/sdn/fabrics/"
+
+  if test -d "$LEGACY_FABRICS_DIRECTORY"; then
+    echo "Removing legacy sdn fabrics directory ..."
+    rm -d $LEGACY_FABRICS_DIRECTORY || echo "Failed to remove legacy sdn folder ${LEGACY_FABRICS_DIRECTORY}!"
+  fi
+}
+
+case "$1" in
+  configure)
+    # TODO: remove with PVE 10+
+    if dpkg --compare-versions "$2" 'lt' '9.0.0'; then
+      remove_fabrics_directory
+    fi
+  ;;
+esac
+
+exit 0
+

src/PVE/Cluster.pm

@@ -81,8 +81,7 @@ my $observed = {
     'sdn/pve-ipam-state.json' => 1,
     'sdn/mac-cache.json' => 1,
     'sdn/dns.cfg' => 1,
-    'sdn/fabrics/openfabric.cfg' => 1,
-    'sdn/fabrics/ospf.cfg' => 1,
+    'sdn/fabrics.cfg' => 1,
     'sdn/.running-config' => 1,
     'virtual-guest/cpu-models.conf' => 1,
     'virtual-guest/profiles.cfg' => 1,

src/pmxcfs/status.c

@@ -110,8 +110,7 @@ static memdb_change_t memdb_change_array[] = {
     {.path = "sdn/mac-cache.json"},
     {.path = "sdn/pve-ipam-state.json"},
     {.path = "sdn/dns.cfg"},
-    {.path = "sdn/fabrics/openfabric.cfg"},
-    {.path = "sdn/fabrics/ospf.cfg"},
+    {.path = "sdn/fabrics.cfg"},
     {.path = "sdn/.running-config"},
     {.path = "virtual-guest/cpu-models.conf"},
     {.path = "virtual-guest/profiles.cfg"},