Make preallocation configurable

Make preallocation configurable

Dockerfile

@@ -48,6 +48,7 @@ EXPOSE 5000
 EXPOSE 5001
 
 ENV URL ""
+ENV ALLOCATE Y
 ENV CPU_CORES 1
 ENV DISK_SIZE 16G
 ENV RAM_SIZE 512M

run/disk.sh

@@ -29,20 +29,27 @@ if [ -f "${DATA}" ]; then
 
     echo "INFO: Resizing data disk from $OLD_SIZE to $DATA_SIZE bytes.."
 
+    if [ "$ALLOCATE" != "Y" ]; then
+
+      truncate -s "${DATA_SIZE}" "${DATA}"; 
+
+    else
+
       REQ=$((DATA_SIZE-OLD_SIZE))
 
       # Check free diskspace    
       SPACE=$(df --output=avail -B 1 "${STORAGE}" | tail -n 1)
 
       if (( REQ > SPACE )); then
-      echo "ERROR: Not enough free space to resize virtual disk." && exit 84
+        echo "ERROR: Not enough free space to resize virtual disk to ${DISK_SIZE}." && exit 84
       fi
 
       if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
-      echo "ERROR: Could not allocate file for virtual disk." && exit 85
+        echo "ERROR: Could not allocate a file for the virtual disk." && exit 85
       fi
 
     fi
+  fi
 
   if [ "$DATA_SIZE" -lt "$OLD_SIZE" ]; then
 
@@ -52,22 +59,31 @@ if [ -f "${DATA}" ]; then
     mv -f "${DATA}" "${DATA}.bak"
 
   fi
-  
 fi
 
 if [ ! -f "${DATA}" ]; then
 
+  # Create an empty file
+
+  if [ "$ALLOCATE" != "Y" ]; then
+
+    truncate -s "${DATA_SIZE}" "${DATA}"
+
+  else
+
     # Check free diskspace
     SPACE=$(df --output=avail -B 1 "${STORAGE}" | tail -n 1)
 
     if (( DATA_SIZE > SPACE )); then
-    echo "ERROR: Not enough free space to create virtual disk." && exit 86
+      echo "ERROR: Not enough free space to create a virtual disk of ${DISK_SIZE}."
+      echo "ERROR: Specify a smaller size or disable preallocation with ALLOCATION=N." && exit 86
     fi
 
-  # Create an empty file
     if ! fallocate -l "${DATA_SIZE}" "${DATA}"; then
       rm -f "${DATA}"
-    echo "ERROR: Could not allocate file for virtual disk." && exit 87
+      echo "ERROR: Could not allocate a file for the virtual disk." && exit 87
+    fi
+
   fi
 
   # Check if file exists
@@ -80,12 +96,11 @@ if [ ! -f "${DATA}" ]; then
 
 fi
 
-AGENT_VERSION=1
 AGENT="${STORAGE}/${BASE}.agent"
-[ -f "$AGENT" ] && AGENT_VERSION=$(cat "${AGENT}")
+[ -f "$AGENT" ] && AGENT_VERSION=$(cat "${AGENT}") || AGENT_VERSION=1
 
 if ((AGENT_VERSION < 5)); then
-  echo "INFO: The installed VirtualDSM Agent is an outdated version, please upgrade it."
+  echo "INFO: The installed VirtualDSM Agent v${AGENT_VERSION} is an outdated version, please upgrade it."
 fi
 
 KVM_DISK_OPTS="\

run/install.sh

@@ -112,12 +112,12 @@ SYSTEM_SIZE="4954537983"
 SPACE=$(df --output=avail -B 1 "$TMP" | tail -n 1)
 
 if (( SYSTEM_SIZE > SPACE )); then
-  echo "ERROR: Not enough free space to create virtual system disk." && exit 87
+  echo "ERROR: Not enough free space to create a 4 GB system disk." && exit 87
 fi
 
 if ! fallocate -l "${SYSTEM_SIZE}" "${SYSTEM}"; then
   rm -f "${SYSTEM}"
-  echo "ERROR: Could not allocate file for virtual system disk." && exit 88
+  echo "ERROR: Could not allocate a file for the system disk." && exit 88
 fi
 
 PART="$TMP/partition.fdisk"

run/network.sh

@@ -1,6 +1,8 @@
 #!/usr/bin/env bash
 set -eu
 
+# Docker environment variabeles
+
 : ${VM_NET_TAP:=''}
 : ${VM_NET_IP:='20.20.20.21'}
 : ${VM_NET_HOST:='VirtualDSM'}

run/power.sh

@@ -42,9 +42,8 @@ _graceful_shutdown(){
 
     # If we cannot shutdown the usual way, fallback to the NMI method
 
-    AGENT_VERSION=1
     AGENT="${STORAGE}/${BASE}.agent"
-    [ -f "$AGENT" ] && AGENT_VERSION=$(cat "${AGENT}")
+    [ -f "$AGENT" ] && AGENT_VERSION=$(cat "${AGENT}") || AGENT_VERSION=1
 
     if ((AGENT_VERSION < 2)); then
 

run/run.sh

@@ -1,6 +1,14 @@
 #!/usr/bin/env bash
 set -eu
 
+# Docker environment variabeles
+
+: ${URL:=''}.                     # URL of PAT file
+: ${ALLOCATE:='Y'}       # Preallocate diskspace
+: ${CPU_CORES:='1'}     # vCPU count
+: ${DISK_SIZE:='16G'}    # Initial disk size
+: ${RAM_SIZE:='512M'} # Amount of RAM
+
 echo "Starting Virtual DSM for Docker v${VERSION}..."
 
 STORAGE="/storage"