0c6c835a39
This simplifies the logic to get the available space the root mountpoint has available and makes it more robust.
58 lines
2.9 KiB
Bash
Executable File
58 lines
2.9 KiB
Bash
Executable File
#!/bin/bash
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set -eu -o pipefail
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readonly USER_HOME="/home/yellowtent"
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readonly APPS_SWAP_FILE="/apps.swap"
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readonly USER_DATA_FILE="/root/user_data.img"
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readonly USER_DATA_DIR="/home/yellowtent/data"
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# all sizes are in mb
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readonly physical_memory=$(LC_ALL=C free -m | awk '/Mem:/ { print $2 }')
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readonly swap_size=$((${physical_memory} > 4096 ? 4096 : ${physical_memory})) # min(RAM, 4GB) if you change this, fix enoughResourcesAvailable() in client.js
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readonly app_count=$((${physical_memory} / 200)) # estimated app count
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readonly disk_size_bytes=$(LC_ALL=C df --output=size / | tail -n1)
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readonly disk_size=$((${disk_size_bytes}/1024))
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readonly system_size=10240 # 10 gigs for system libs, apps images, installer, box code, data and tmp
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readonly ext4_reserved=$((disk_size * 5 / 100)) # this can be changes using tune2fs -m percent /dev/vda1
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echo "Physical memory: ${physical_memory}"
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echo "Estimated app count: ${app_count}"
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echo "Disk size: ${disk_size}M"
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# Allocate swap for general app usage
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readonly current_swap=$(swapon --show="name,size" --noheadings --bytes | awk 'BEGIN{s=0}{s+=$2}END{printf "%.0f", s/1024/1024}')
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readonly needed_swap_size=$((swap_size - current_swap))
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if [[ ${needed_swap_size} -gt 0 ]]; then
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echo "Need more swap of ${needed_swap_size}M"
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# compute size of apps.swap ignoring what is already set
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without_apps_swap=$(swapon --show="name,size" --noheadings --bytes | awk 'BEGIN{s=0}{if ($1!="/apps.swap") s+=$2}END{printf "%.0f", s/1024/1024}')
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apps_swap_size=$((swap_size - without_apps_swap))
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echo "Creating Apps swap file of size ${apps_swap_size}M"
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if [[ -f "${APPS_SWAP_FILE}" ]]; then
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echo "Swapping off before resizing swap"
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swapoff "${APPS_SWAP_FILE}" || true
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fi
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fallocate -l "${apps_swap_size}m" "${APPS_SWAP_FILE}"
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chmod 600 "${APPS_SWAP_FILE}"
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mkswap "${APPS_SWAP_FILE}"
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swapon "${APPS_SWAP_FILE}"
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if ! grep -q "${APPS_SWAP_FILE}" /etc/fstab; then
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echo "Adding swap to fstab"
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echo "${APPS_SWAP_FILE} none swap sw 0 0" >> /etc/fstab
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fi
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else
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echo "Swap requirements already met"
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fi
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# 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.
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echo "Resizing data volume"
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home_data_size=$((disk_size - system_size - swap_size - ext4_reserved))
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echo "Resizing up btrfs user data to size ${home_data_size}M"
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umount "${USER_DATA_DIR}" || true
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# Do not preallocate (non-sparse). Doing so overallocates for data too much in advance and causes problems when using many apps with smaller data
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# fallocate -l "${home_data_size}m" "${USER_DATA_FILE}" # does not overwrite existing data
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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
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mount -t btrfs -o loop,nosuid "${USER_DATA_FILE}" ${USER_DATA_DIR}
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btrfs filesystem resize max "${USER_DATA_DIR}"
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