From e22f58897756d8321181470ab2edc0ddf0fcefdb Mon Sep 17 00:00:00 2001
From: Sanjeev Rohila <sanjeev.rohila@delphix.com>
Date: Mon, 2 Jun 2025 15:05:21 +0530
Subject: [PATCH] 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
---
 debian/preinst                                | 42 +++++++++++++++++++
 .../systemd/system/delphix-platform.service   |  1 +
 .../roles/delphix-platform/tasks/main.yml     |  8 ++--
 .../var/lib/delphix-platform/export-home      | 24 +++++++++++
 4 files changed, 71 insertions(+), 4 deletions(-)
 create mode 100644 debian/preinst
 create mode 100644 files/common/var/lib/delphix-platform/export-home

diff --git a/debian/preinst b/debian/preinst
new file mode 100644
index 000000000..a22ccb233
--- /dev/null
+++ b/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
diff --git a/files/common/lib/systemd/system/delphix-platform.service b/files/common/lib/systemd/system/delphix-platform.service
index 89a809d67..70514fdbe 100644
--- a/files/common/lib/systemd/system/delphix-platform.service
+++ b/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/delphix-platform/export-home
 RemainAfterExit=yes
 
 #
diff --git a/files/common/var/lib/delphix-platform/ansible/10-delphix-platform/roles/delphix-platform/tasks/main.yml b/files/common/var/lib/delphix-platform/ansible/10-delphix-platform/roles/delphix-platform/tasks/main.yml
index 67abf0d98..18cff1522 100644
--- a/files/common/var/lib/delphix-platform/ansible/10-delphix-platform/roles/delphix-platform/tasks/main.yml
+++ b/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
diff --git a/files/common/var/lib/delphix-platform/export-home b/files/common/var/lib/delphix-platform/export-home
new file mode 100644
index 000000000..404f5ecb0
--- /dev/null
+++ b/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