feat: add script to unmount disk

Author: andres.suarez

ansible/files/adminapi.sudoers.conf

@@ -6,6 +6,7 @@ Cmnd_Alias PGBOUNCER = /bin/systemctl start pgbouncer.service, /bin/systemctl st
 
 %adminapi ALL= NOPASSWD: /root/grow_fs.sh
 %adminapi ALL= NOPASSWD: /root/mount-volume.sh
+%adminapi ALL= NOPASSWD: /root/unmount-volume.sh
 %adminapi ALL= NOPASSWD: /root/manage_readonly_mode.sh
 %adminapi ALL= NOPASSWD: /etc/adminapi/pg_upgrade_scripts/prepare.sh
 %adminapi ALL= NOPASSWD: /etc/adminapi/pg_upgrade_scripts/initiate.sh

ansible/files/mount-volume.sh

@@ -11,6 +11,11 @@ if [[ -z "$DEVICE" || -z "$MOUNT_POINT" ]]; then
   exit 1
 fi
 
+#  Mount a block device to a specified mount point
+#  If the device is not formatted, format it as ext4
+#  Set ownership to postgres:postgres and permissions to 750
+#  Add the mount entry to /etc/fstab for persistence across reboots
+
 OWNER="postgres:postgres"
 PERMISSIONS="750"
 FSTYPE="ext4"

ansible/files/unmount-volume.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+MOUNT_POINT=${1:-}
+DELETE_FLAG=${2:-}
+
+if [[ -z "$MOUNT_POINT" ]]; then
+  echo "Usage: $0 <mount_point> [--delete-dir]"
+  echo "Unmount only: sudo ./unmount-volume.sh /data/150008"
+  echo "Unmount delete dir: sudo ./unmount-volume.sh /data/150008 --delete-dir"
+  exit 1
+fi
+
+# Unmount a block device from a specified mount point
+# Remove the corresponding entry from /etc/fstab for persistence across reboots 
+
+FSTAB_FILE="/etc/fstab"
+BACKUP_FILE="/etc/fstab.bak"
+
+if mountpoint -q "$MOUNT_POINT"; then
+  echo "Unmounting $MOUNT_POINT"
+  umount "$MOUNT_POINT"
+else
+  echo "$MOUNT_POINT is not currently mounted — skipping umount"
+fi
+
+UUID=$(findmnt -no UUID "$MOUNT_POINT" 2>/dev/null || true)
+
+if [[ -n "$UUID" ]]; then
+  echo "Removing UUID=$UUID from $FSTAB_FILE"
+  cp "$FSTAB_FILE" "$BACKUP_FILE"
+  sed -i "/UUID=${UUID//\//\\/}/d" "$FSTAB_FILE"
+else
+  echo "Could not find UUID for $MOUNT_POINT — skipping fstab cleanup"
+fi
+
+if [[ "$DELETE_FLAG" == "--delete-dir" ]]; then
+  echo "Deleting mount point directory: $MOUNT_POINT"
+  rm -rf "$MOUNT_POINT"
+fi
+
+echo "Unmount and cleanup complete for $MOUNT_POINT"

ansible/tasks/internal/admin-api.yml

@@ -15,6 +15,7 @@
     - { file: "manage_readonly_mode.sh" }
     - { file: "pg_egress_collect.pl" }
     - { file: "mount-volume.sh" }
+    - { file: "unmount-volume.sh" }
 
 - name: give adminapi user permissions
   copy: