Adding logic to take case the /export/home mount before delting /export/home

Adding the mount point logic back to delphix-platform.sh script
Changing as per Seb-s comment to alter the softlink logic.
Changing the code to previous version to validate the comments.
Changing the delphix-legacy-link.service to perform the same steps next reboot like deferred upgrade.
Creating a different service for taking care of soft /export/home -> /home
DLPX-89763 DLPX-86523 delphix-platform changes
Moved the code to create symlink to different script
Removing the autofs handling as per the concerns raised by Seb and our validation
Removing the softlink loginc from main.yml

PR URL: https://www.github.com/delphix/delphix-platform/pull/477

Author: justsanjeev

debian/preinst

@@ -0,0 +1,42 @@
+#!/bin/bash -eux
+#
+# Copyright 2025 Delphix
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+case $1 in
+upgrade)
+	# Home directories were previously mounted under /export/home,
+	# and this was changed to /home. This is the upgrade logic that
+	# updates the /etc/fstab file to reflect that change.
+	# Home directories will be mounted in both /export/home and /home
+	# until the system is rebooted to ensure that running processes
+	# referencing the old /export/home paths continue to function
+	# while also enabling new logins under /home to work.
+	fs_tab=/etc/fstab
+
+	if grep -q "\/export\/home" "$fs_tab"; then
+		sed -i 's|/export/home|/home|g' "$fs_tab"
+		mount /home
+	fi
+
+	passwd_file=/etc/passwd
+	if grep -q "\/export\/home" "$passwd_file"; then
+		sed -i 's/\/export\/home/\/home/g' /etc/passwd
+	fi
+
+	;;
+esac
+
+exit 0

files/common/lib/systemd/system/delphix-platform.service

@@ -24,6 +24,7 @@ Before=rsync.service docker.service
 Type=oneshot
 ExecStart=/var/lib/delphix-platform/ansible/apply
 ExecStart=/var/lib/delphix-platform/dynamic-debug
+ExecStart=/var/lib/setup-export-home/export_home
 RemainAfterExit=yes
 
 #

files/common/var/lib/delphix-platform/ansible/10-delphix-platform/roles/delphix-platform/tasks/main.yml

@@ -1,5 +1,5 @@
 #
-# Copyright 2018, 2023 Delphix
+# Copyright 2018, 2025 Delphix
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@
 # it below; otherwise that task will fail.
 #
 - file:
-    path: /export/home
+    path: /home
     state: directory
     mode: 0755
 
@@ -35,7 +35,7 @@
     shell: /bin/bash
     create_home: yes
     comment: Delphix User
-    home: /export/home/delphix
+    home: /home/delphix
 
 #
 # In order for this locale to be used (e.g. by virtualization) we need
@@ -635,7 +635,7 @@
 
 - name: Source bash completion
   blockinfile:
-    dest: "/export/home/delphix/.bashrc"
+    dest: "/home/delphix/.bashrc"
     block: |
       . /etc/bash_completion.d/systemctl
       . /etc/bash_completion.d/zfs

files/common/var/lib/delphix-platform/export-home

@@ -0,0 +1,24 @@
+#!/bin/bash
+#
+# Copyright (c) 2025 by Delphix. All rights reserved.
+#
+
+#
+# This script ensures that the /export/home is a symlink
+# to /home.
+#
+
+if ! mountpoint -q /export/home; then
+  if [ ! -L /export/home ]; then
+    echo 'Ensuring /export/home is a symlink to /home...'
+    if [ -e /export/home ]; then
+      echo 'Removing existing /export/home directory...'
+      rm -rf /export/home
+    fi
+    if [ ! -d /export ]; then
+      mkdir /export
+    fi
+    echo 'Creating symlink: /export/home -> /home'
+    ln -s /home /export/home
+  fi
+fi