rename the service to cloudron-resize-fs

setup/start/cloudron-resize-fs.sh

@@ -0,0 +1,50 @@
+#!/bin/bash
+
+set -eu -o pipefail
+
+readonly USER_HOME="/home/yellowtent"
+readonly APPS_SWAP_FILE="/apps.swap"
+readonly USER_DATA_FILE="/root/user_data.img"
+readonly USER_DATA_DIR="/home/yellowtent/data"
+
+# detect device of rootfs (http://forums.fedoraforum.org/showthread.php?t=270316)
+disk_device="$(for d in $(find /dev -type b); do [ "$(mountpoint -d /)" = "$(mountpoint -x $d)" ] && echo $d && break; done)"
+
+existing_swap=$(cat /proc/meminfo | grep SwapTotal | awk '{ printf "%.0f", $2/1024 }')
+
+# all sizes are in mb
+readonly physical_memory=$(free -m | awk '/Mem:/ { print $2 }')
+readonly swap_size=$((${physical_memory} - ${existing_swap})) # if you change this, fix enoughResourcesAvailable() in client.js
+readonly app_count=$((${physical_memory} / 200)) # estimated app count
+readonly disk_size_gb=$(fdisk -l ${disk_device} | grep "Disk ${disk_device}" | awk '{ printf "%.0f", $3 }')
+readonly disk_size=$((disk_size_gb * 1024))
+readonly system_size=10240 # 10 gigs for system libs, apps images, installer, box code and tmp
+readonly ext4_reserved=$((disk_size * 5 / 100)) # this can be changes using tune2fs -m percent /dev/vda1
+
+echo "Disk device: ${disk_device}"
+echo "Physical memory: ${physical_memory}"
+echo "Estimated app count: ${app_count}"
+echo "Disk size: ${disk_size}M"
+
+# Allocate swap for general app usage
+if [[ ! -f "${APPS_SWAP_FILE}" && ${swap_size} -gt 0 ]]; then
+    echo "Creating Apps swap file of size ${swap_size}M"
+    fallocate -l "${swap_size}m" "${APPS_SWAP_FILE}"
+    chmod 600 "${APPS_SWAP_FILE}"
+    mkswap "${APPS_SWAP_FILE}"
+    swapon "${APPS_SWAP_FILE}"
+    echo "${APPS_SWAP_FILE}  none  swap  sw  0 0" >> /etc/fstab
+else
+    echo "Apps Swap file already exists"
+fi
+
+# see start.sh for the initial default size of 8gb. On small disks the calculation might be lower than 8gb resulting in a failure to resize here.
+echo "Resizing data volume"
+home_data_size=$((disk_size - system_size - swap_size - ext4_reserved))
+echo "Resizing up btrfs user data to size ${home_data_size}M"
+umount "${USER_DATA_DIR}" || true
+# Do not preallocate (non-sparse). Doing so overallocates for data too much in advance and causes problems when using many apps with smaller data
+# fallocate -l "${home_data_size}m" "${USER_DATA_FILE}" # does not overwrite existing data
+truncate -s "${home_data_size}m" "${USER_DATA_FILE}" # this will shrink it if the file had existed. this is useful when running this script on a live system
+mount -t btrfs -o loop,nosuid "${USER_DATA_FILE}" ${USER_DATA_DIR}
+btrfs filesystem resize max "${USER_DATA_DIR}"