From 718dfcdcc8d0753e53703e28cd39dd86b48864ed Mon Sep 17 00:00:00 2001
From: Viktor Ribchev <viktor.ribchev@ontotext.com>
Date: Wed, 8 Nov 2023 16:03:45 +0200
Subject: [PATCH] added volume mounting

---
 modules/vm/templates/entrypoint.sh.tpl | 35 +++++++++++++++++++++++---
 1 file changed, 31 insertions(+), 4 deletions(-)

diff --git a/modules/vm/templates/entrypoint.sh.tpl b/modules/vm/templates/entrypoint.sh.tpl
index 93752fb..022475d 100644
--- a/modules/vm/templates/entrypoint.sh.tpl
+++ b/modules/vm/templates/entrypoint.sh.tpl
@@ -11,8 +11,7 @@ until ping -c 1 google.com &> /dev/null; do
   sleep 5
 done
 
-# TODO: Find/create/mount volumes
-# https://learn.microsoft.com/en-us/azure/virtual-machine-scale-sets/tutorial-use-disks-cli
+# Find/create/attach volumes
 
 instanceHostname=\'$(hostname)\'
 subscriptionID=$(az account show --query "id" --output tsv)
@@ -21,10 +20,10 @@ vmssName=$(az vmss list --query "[0].name" --output tsv)
 instanceID=$(az vmss list-instances --resource-group $resourceGroup --name $vmssName --query "[?contains(osProfile.computerName, ${instanceHostname})].instanceId" --output tsv)
 zoneID=$(az vmss list-instances --resource-group $resourceGroup --name $vmssName --query "[?contains(osProfile.computerName, ${instanceHostname})].zones" --output tsv)
 regionID=$(az vmss list-instances --resource-group $resourceGroup --name $vmssName --query "[?contains(osProfile.computerName, ${instanceHostname})].location" --output tsv)
-
 # TODO replace with external variables
 tier="P40"
-lun=2
+lun=2 # device will be mounted as sdb
+graphdb_device="/dev/sdb"
 diskSizeGB=128
 
 # Define the disk name based on the hostname
@@ -61,6 +60,34 @@ else
     echo "Device /dev/sdb is not available. Something went wrong."
 fi
 
+# create a file system if there isn't any
+if [ "$graphdb_device: data" = "$(file -s $graphdb_device)" ]; then
+  mkfs -t ext4 $graphdb_device
+fi
+
+disk_mount_point="/var/opt/graphdb"
+
+# Check if the disk is already mounted
+if ! mount | grep -q "$graphdb_device"; then
+  echo "The disk at $graphdb_device is not mounted."
+
+  # Create the mount point if it doesn't exist
+  if [ ! -d "$disk_mount_point" ]; then
+    mkdir -p "$disk_mount_point"
+  fi
+
+  # Add an entry to the fstab file to automatically mount the disk
+  if ! grep -q "$graphdb_device" /etc/fstab; then
+    echo "$graphdb_device $disk_mount_point ext4 defaults 0 2" >> /etc/fstab
+  fi
+
+  # Mount the disk
+  mount "$disk_mount_point"
+  echo "The disk at $graphdb_device is now mounted at $disk_mount_point."
+else
+  echo "The disk at $graphdb_device is already mounted."
+fi
+
 #
 # DNS hack
 #