66 lines
2.3 KiB
Bash
Executable File
66 lines
2.3 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 BACKUP_SWAP_FILE="/backup.swap" # used when doing app backups
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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
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if [[ -b "/dev/vda1" ]]; then
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disk_device="/dev/vda1"
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fi
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if [[ -b "/dev/xvda1" ]]; then
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disk_device="/dev/xvda1"
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fi
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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}"
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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 '{ print $3 }')
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readonly disk_size=$((disk_size_gb * 1024))
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readonly backup_swap_size=1024
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# readonly system_size=5120 # 5 gigs for system libs, installer, box code and tmp
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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: ${disk_size}"
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# Allocate two sets of swap files - one for general app usage and another for backup
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# The backup swap is setup for swap on the fly by the backup scripts
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if [[ ! -f "${APPS_SWAP_FILE}" ]]; 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 "${APPS_SWAP_FILE} none swap sw 0 0" >> /etc/fstab
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else
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echo "Apps Swap file already exists"
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fi
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if [[ ! -f "${BACKUP_SWAP_FILE}" ]]; then
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echo "Creating Backup swap file of size ${backup_swap_size}M"
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fallocate -l "${backup_swap_size}m" "${BACKUP_SWAP_FILE}"
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chmod 600 "${BACKUP_SWAP_FILE}"
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mkswap "${BACKUP_SWAP_FILE}"
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else
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echo "Backups Swap file already exists"
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fi
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echo "Resizing data volume"
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home_data_size=$((disk_size - system_size - swap_size - backup_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}"
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fallocate -l "${home_data_size}m" "${USER_DATA_FILE}" # does not overwrite existing data
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mount "${USER_DATA_FILE}"
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btrfs filesystem resize max "${USER_DATA_DIR}"
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