4668e3a771
This shell script and the associated systemd service are hooks to setup the system like swap and volumes It is part of the base image
54 lines
2.4 KiB
Bash
Executable File
54 lines
2.4 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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# detect device of rootfs (http://forums.fedoraforum.org/showthread.php?t=270316)
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disk_device="$(for d in $(find /dev -type b); do [ "$(mountpoint -d /)" = "$(mountpoint -x $d)" ] && echo $d && break; done)"
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existing_swap=$(cat /proc/meminfo | grep SwapTotal | awk '{ printf "%.0f", $2/1024 }')
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# allow root access over ssh
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sed -e 's/.* \(ssh-rsa.*\)/\1/' -i /root/.ssh/authorized_keys
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# all sizes are in mb
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readonly physical_memory=$(free -m | awk '/Mem:/ { print $2 }')
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readonly swap_size=$((${physical_memory} - ${existing_swap})) # if you change this, fix enoughResourcesAvailable() in client.js
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readonly app_count=$((${physical_memory} / 200)) # estimated app count
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readonly disk_size_gb=$(fdisk -l ${disk_device} | grep "Disk ${disk_device}" | awk '{ printf "%.0f", $3 }')
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readonly disk_size=$((disk_size_gb * 1024))
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readonly system_size=10240 # 10 gigs for system libs, apps images, installer, box code 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 "Disk device: ${disk_device}"
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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: ${disk_size}"
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# Allocate swap for general app usage
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if [[ ! -f "${APPS_SWAP_FILE}" && ${swap_size} -gt 0 ]]; then
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echo "Creating Apps swap file of size ${swap_size}M"
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fallocate -l "${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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echo "${APPS_SWAP_FILE} none swap sw 0 0" >> /etc/fstab
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else
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echo "Apps Swap file already exists"
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fi
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echo "Resizing data volume"
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home_data_size=$((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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