70 lines
2.6 KiB
Bash
Executable File
70 lines
2.6 KiB
Bash
Executable File
#!/bin/bash
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set -eu -o pipefail
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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_HOME_FILE="/root/user_home.img"
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readonly DOCKER_DATA_FILE="/root/docker_data.img"
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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 docker_data_size=$((6 * 1024 + app_count * 500)) # 6gb base + 500m for each app
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readonly disk_size_gb=$(fdisk -l /dev/vda1 | grep 'Disk /dev/vda1' | 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 and tmp
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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 "${BACKUP_SWAP_FILE}"
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else
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echo "Backups Swap file already exists"
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fi
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if [ ! -f "${DOCKER_DATA_FILE}" ]; then
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if aufs_mounts=$(grep 'aufs' /proc/mounts | awk '{ print $2 }' | sort -r); then
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umount -l "${aufs_mounts}"
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fi
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rm -rf /var/lib/docker
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mkdir /var/lib/docker
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echo "Settings up btrfs docker of size ${docker_data_size}M"
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fallocate -l "${docker_data_size}m" "${DOCKER_DATA_FILE}"
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mkfs.btrfs -L DockerData "${DOCKER_DATA_FILE}"
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echo "${DOCKER_DATA_FILE} /var/lib/docker btrfs loop,nosuid 0 0" >> /etc/fstab
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echo 'DOCKER_OPTS="-s btrfs"' >> /etc/default/docker
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mount "${DOCKER_DATA_FILE}"
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else
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echo "Docker is already btrfs"
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fi
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if [[ ! -f "${USER_HOME_FILE}" ]]; then
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home_data_size=$((disk_size - system_size - docker_data_size - swap_size - backup_swap_size))
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echo "Setting up btrfs user home of size ${home_data_size}M"
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fallocate -l "${home_data_size}m" "${USER_HOME_FILE}"
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mkfs.btrfs -L UserHome "${USER_HOME_FILE}"
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echo "${USER_HOME_FILE} ${USER_HOME} btrfs loop,nosuid 0 0" >> /etc/fstab
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mount "${USER_HOME_FILE}"
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btrfs subvolume create "${USER_HOME}/data"
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else
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echo "Home is already btrfs"
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fi
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