113 lines
3.7 KiB
Bash
113 lines
3.7 KiB
Bash
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#!/bin/bash
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# Backup a remote Nextcloud database using ssh.
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# Usage: backup-database [OPTIONS] <destination>
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usage() {
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>&2 printf "Usage: %s <remote> <destination>\n" "${0}"
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>&2 printf "It is assumed that the machine has passwordless access to the remote host.\n\n"
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>&2 printf "Options:\n"
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>&2 printf "\t-e \t Specify the environment file to use\n"
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>&2 printf "\t-h \t Show this message\n"
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exit "${1:-1}"
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}
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# Get options
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while getopts ":e:h" option; do
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case "${option}" in
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e)
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env_file="${OPTARG}"
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;;
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h)
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usage
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;;
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*)
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>&2 printf "Error: Invalid option: '%s'.\n" "${option}"
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usage
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;;
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esac
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done
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shift $(( OPTIND - 1 ))
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# Check arguments.
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if [ $# -ne 2 ]; then
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>&2 printf "Error: You need to specify a destination and a remote host.\n"
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usage
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elif ! [ -d "${2}" ]; then
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>&2 printf "Error: Specified destination does not exist or is not readable : '%s'.\n" "${1}"
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usage
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else
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remote="${1}"
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local_destination="${2}"
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fi
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# Abort entire script if any command fails
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set -e
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if ! ssh "${remote}" "test -f '${env_file:=.env}'"; then
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>&2 printf "Error: Environment file does not exist: '%s'.\n" "${env_file}"
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>&2 printf "Debug: PWD: '%s'.\n" "$(ssh "${remote}" 'pwd')"
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>&2 printf " Consider using the option '-e' to specify the correct environment file.\n"
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usage 2
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elif ! ssh "${remote}" "test -r '${env_file:=.env}'"; then
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>&2 printf "Error: Environment file is not readable: '%s'.\n" "${env_file}"
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>&2 printf " Make sure the user you are using connect as has access to the file.\n"
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usage 2
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fi
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backupfile="nextcloud_$(date +'%Y%m%d').tar.gz"
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# Check if the script would override existing files.
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if [ -e "${local_destination}/${backupfile}" ]; then
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>&2 printf "Warning: The backup file '%s' already exists. Not overwriting.\n" "${local_destination}/${backupfile}"
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while [[ -e "${local_destination}/${backupfile}" ]]; do
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backupfile="${backupfile%.tar.gz}_bis${counter:=1}.tar.gz"
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((counter++))
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done
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>&2 printf "Warning: Using '%s' as a safe alternative backup file.\n" "${local_destination}/${backupfile}"
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fi
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# Database backup
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# Create a temporary destination on remote host.
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remote_destination="$( ssh "${remote}" 'mktemp -d' )"
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printf "Debug: Using '%s' as a remote temporary directory.\n" "${remote_destination}"
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# Filename for database backup
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database_backupfile='sqlbkp.bak'
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remote_database_backupfile="${remote_destination}/${database_backupfile}"
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# Turn on maintenance mode
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ssh "${remote}" 'sudo -u www-data /usr/bin/php /var/www/nextcloud/occ maintenance:mode --on'
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echo 'Info: Backing up database'
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ssh "${remote}" "source '${env_file}' && pg_dump 'nextcloud' -cwv -U 'nextcloud' -h 'localhost' > '${remote_database_backupfile}'"
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# Restore using:
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# psql -U nextcloud -h localhost -d nextcloud -f "path/to/file"
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# Files backup
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echo 'Info: Copying static files.'
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ssh "${remote}" "cp -a '/var/www/nextcloud/themes' '${remote_destination}'"
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# Turn off maintenance mode
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ssh "${remote}" 'sudo -u www-data /usr/bin/php /var/www/nextcloud/occ maintenance:mode --off'
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# Copy everything over to local machine.
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echo 'Info: Copying to local machine.'
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ssh "${remote}" "tar -czf '/tmp/${backupfile}' ${remote_destination}"
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scp "${remote}:/tmp/${backupfile}" "${local_destination}"
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# Remove temporary destination on remote host.
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printf "Debug: Cleaning up '%s' on %s.\n" "${remote_destination}" "${remote}"
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ssh "${remote}" "rm -rf ${remote_destination}"
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# Backup cleanup
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# Only keep 30 days of backups
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printf "Info: Cleaning up old database backups in '%s'\n" "${local_destination}"
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find "${local_destination}" -name 'nextcloud_*.tar.gz' -type f -mtime +30 -print -delete
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echo 'Done'
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