mirror of
https://github.com/YunoHost/yunohost.git
synced 2024-09-03 20:06:10 +02:00
507 lines
21 KiB
Bash
507 lines
21 KiB
Bash
#!/bin/bash
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CAN_BIND=${CAN_BIND:-1}
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# Add a file or a directory to the list of paths to backup
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#
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# usage: ynh_backup --src_path=src_path [--dest_path=dest_path] [--is_big] [--not_mandatory]
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# | arg: -s, --src_path= - file or directory to bind or symlink or copy. it shouldn't be in the backup dir.
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# | arg: -d, --dest_path= - destination file or directory inside the backup dir
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# | arg: -b, --is_big - Indicate data are big (mail, video, image ...)
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# | arg: -m, --not_mandatory - Indicate that if the file is missing, the backup can ignore it.
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#
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# This helper can be used both in a system backup hook, and in an app backup script
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#
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# `ynh_backup` writes `src_path` and the relative `dest_path` into a CSV file, and it
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# creates the parent destination directory
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#
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# If `dest_path` is ended by a slash it complete this path with the basename of `src_path`.
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#
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# Example in the context of a wordpress app :
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# ```
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# ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf"
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# # => This line will be added into CSV file
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# # "/etc/nginx/conf.d/$domain.d/$app.conf","apps/wordpress/etc/nginx/conf.d/$domain.d/$app.conf"
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#
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# ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "conf/nginx.conf"
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# # => "/etc/nginx/conf.d/$domain.d/$app.conf","apps/wordpress/conf/nginx.conf"
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#
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# ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "conf/"
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# # => "/etc/nginx/conf.d/$domain.d/$app.conf","apps/wordpress/conf/$app.conf"
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#
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# ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "conf"
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# # => "/etc/nginx/conf.d/$domain.d/$app.conf","apps/wordpress/conf"
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#
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# #Deprecated usages (maintained for retro-compatibility)
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# ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "${backup_dir}/conf/nginx.conf"
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# # => "/etc/nginx/conf.d/$domain.d/$app.conf","apps/wordpress/conf/nginx.conf"
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#
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# ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf" "/conf/"
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# # => "/etc/nginx/conf.d/$domain.d/$app.conf","apps/wordpress/conf/$app.conf"
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#
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# ```
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#
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# How to use `--is_big`:
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#
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# `--is_big` is used to specify that this part of the backup can be quite huge.
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# So, you don't want that your package does backup that part during ynh_backup_before_upgrade.
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# In the same way, an user may doesn't want to backup this big part of the app for
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# each of his backup. And so handle that part differently.
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#
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# As this part of your backup may not be done, your restore script has to handle it.
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# In your restore script, use `--not_mandatory` with `ynh_restore_file`
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# As well in your remove script, you should not remove those data ! Or an user may end up with
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# a failed upgrade restoring an app without data anymore !
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#
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# To have the benefit of `--is_big` while doing a backup, you can whether set the environement
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# variable `BACKUP_CORE_ONLY` to 1 (`BACKUP_CORE_ONLY=1`) before the backup command. It will affect
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# only that backup command.
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# Or set the config `do_not_backup_data` to 1 into the `settings.yml` of the app. This will affect
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# all backups for this app until the setting is removed.
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#
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# Requires YunoHost version 2.4.0 or higher.
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# Requires YunoHost version 3.5.0 or higher for the argument `--not_mandatory`
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ynh_backup() {
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# TODO find a way to avoid injection by file strange naming !
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# Declare an array to define the options of this helper.
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local legacy_args=sdbm
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local -A args_array=([s]=src_path= [d]=dest_path= [b]=is_big [m]=not_mandatory)
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local src_path
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local dest_path
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local is_big
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local not_mandatory
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# Manage arguments with getopts
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ynh_handle_getopts_args "$@"
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dest_path="${dest_path:-}"
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is_big="${is_big:-0}"
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not_mandatory="${not_mandatory:-0}"
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BACKUP_CORE_ONLY=${BACKUP_CORE_ONLY:-0}
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test -n "${app:-}" && do_not_backup_data=$(ynh_app_setting_get --app=$app --key=do_not_backup_data)
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# If backing up core only (used by ynh_backup_before_upgrade),
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# don't backup big data items
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if [ $is_big -eq 1 ] && ([ ${do_not_backup_data:-0} -eq 1 ] || [ $BACKUP_CORE_ONLY -eq 1 ]); then
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if [ $BACKUP_CORE_ONLY -eq 1 ]; then
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ynh_print_info --message="$src_path will not be saved, because 'BACKUP_CORE_ONLY' is set."
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else
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ynh_print_info --message="$src_path will not be saved, because 'do_not_backup_data' is set."
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fi
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return 0
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fi
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# ==============================================================================
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# Format correctly source and destination paths
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# ==============================================================================
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# Be sure the source path is not empty
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if [ ! -e "$src_path" ]; then
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ynh_print_warn --message="Source path '${src_path}' does not exist"
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if [ "$not_mandatory" == "0" ]; then
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# This is a temporary fix for fail2ban config files missing after the migration to stretch.
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if echo "${src_path}" | grep --quiet "/etc/fail2ban"; then
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touch "${src_path}"
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ynh_print_info --message="The missing file will be replaced by a dummy one for the backup !!!"
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else
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return 1
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fi
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else
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return 0
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fi
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fi
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# Transform the source path as an absolute path
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# If it's a dir remove the ending /
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src_path=$(realpath "$src_path")
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# If there is no destination path, initialize it with the source path
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# relative to "/".
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# eg: src_path=/etc/yunohost -> dest_path=etc/yunohost
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if [[ -z "$dest_path" ]]; then
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dest_path="${src_path#/}"
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else
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if [[ "${dest_path:0:1}" == "/" ]]; then
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# If the destination path is an absolute path, transform it as a path
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# relative to the current working directory ($YNH_CWD)
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#
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# If it's an app backup script that run this helper, YNH_CWD is equal to
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# $YNH_BACKUP_DIR/apps/APP_INSTANCE_NAME/backup/
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#
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# If it's a system part backup script, YNH_CWD is equal to $YNH_BACKUP_DIR
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dest_path="${dest_path#$YNH_CWD/}"
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# Case where $2 is an absolute dir but doesn't begin with $YNH_CWD
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if [[ "${dest_path:0:1}" == "/" ]]; then
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dest_path="${dest_path#/}"
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fi
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fi
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# Complete dest_path if ended by a /
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if [[ "${dest_path: -1}" == "/" ]]; then
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dest_path="${dest_path}/$(basename $src_path)"
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fi
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fi
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# Check if dest_path already exists in tmp archive
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if [[ -e "${dest_path}" ]]; then
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ynh_print_err --message="Destination path '${dest_path}' already exist"
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return 1
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fi
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# Add the relative current working directory to the destination path
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local rel_dir="${YNH_CWD#$YNH_BACKUP_DIR}"
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rel_dir="${rel_dir%/}/"
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dest_path="${rel_dir}${dest_path}"
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dest_path="${dest_path#/}"
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# ==============================================================================
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# ==============================================================================
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# Write file to backup into backup_list
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# ==============================================================================
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local src=$(echo "${src_path}" | sed --regexp-extended 's/"/\"\"/g')
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local dest=$(echo "${dest_path}" | sed --regexp-extended 's/"/\"\"/g')
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echo "\"${src}\",\"${dest}\"" >>"${YNH_BACKUP_CSV}"
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# ==============================================================================
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# Create the parent dir of the destination path
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# It's for retro compatibility, some script consider ynh_backup creates this dir
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mkdir --parents $(dirname "$YNH_BACKUP_DIR/${dest_path}")
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}
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# Restore all files that were previously backuped in a core backup script or app backup script
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#
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# usage: ynh_restore
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#
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# Requires YunoHost version 2.6.4 or higher.
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ynh_restore() {
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# Deduce the relative path of $YNH_CWD
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local REL_DIR="${YNH_CWD#$YNH_BACKUP_DIR/}"
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REL_DIR="${REL_DIR%/}/"
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# For each destination path begining by $REL_DIR
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cat ${YNH_BACKUP_CSV} | tr --delete $'\r' | grep --only-matching --no-filename --perl-regexp "^\".*\",\"$REL_DIR.*\"$" \
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| while read line; do
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local ORIGIN_PATH=$(echo "$line" | grep --only-matching --no-filename --perl-regexp "^\"\K.*(?=\",\".*\"$)")
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local ARCHIVE_PATH=$(echo "$line" | grep --only-matching --no-filename --perl-regexp "^\".*\",\"$REL_DIR\K.*(?=\"$)")
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ynh_restore_file --origin_path="$ARCHIVE_PATH" --dest_path="$ORIGIN_PATH"
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done
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}
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# Return the path in the archive where has been stocked the origin path
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#
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# [internal]
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#
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# usage: _get_archive_path ORIGIN_PATH
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_get_archive_path() {
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# For security reasons we use csv python library to read the CSV
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python3 -c "
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import sys
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import csv
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with open(sys.argv[1], 'r') as backup_file:
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backup_csv = csv.DictReader(backup_file, fieldnames=['source', 'dest'])
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for row in backup_csv:
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if row['source']==sys.argv[2].strip('\"'):
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print(row['dest'])
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sys.exit(0)
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raise Exception('Original path for %s not found' % sys.argv[2])
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" "${YNH_BACKUP_CSV}" "$1"
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return $?
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}
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# Restore a file or a directory
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#
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# usage: ynh_restore_file --origin_path=origin_path [--dest_path=dest_path] [--not_mandatory]
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# | arg: -o, --origin_path= - Path where was located the file or the directory before to be backuped or relative path to $YNH_CWD where it is located in the backup archive
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# | arg: -d, --dest_path= - Path where restore the file or the dir. If unspecified, the destination will be `ORIGIN_PATH` or if the `ORIGIN_PATH` doesn't exist in the archive, the destination will be searched into `backup.csv`
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# | arg: -m, --not_mandatory - Indicate that if the file is missing, the restore process can ignore it.
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#
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# Use the registered path in backup_list by ynh_backup to restore the file at the right place.
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#
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# examples:
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# ynh_restore_file -o "/etc/nginx/conf.d/$domain.d/$app.conf"
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# # You can also use relative paths:
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# ynh_restore_file -o "conf/nginx.conf"
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#
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# If `DEST_PATH` already exists and is lighter than 500 Mo, a backup will be made in
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# `/var/cache/yunohost/appconfbackup/`. Otherwise, the existing file is removed.
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#
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# if `apps/$app/etc/nginx/conf.d/$domain.d/$app.conf` exists, restore it into
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# `/etc/nginx/conf.d/$domain.d/$app.conf`
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# if no, search for a match in the csv (eg: conf/nginx.conf) and restore it into
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# `/etc/nginx/conf.d/$domain.d/$app.conf`
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#
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# Requires YunoHost version 2.6.4 or higher.
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# Requires YunoHost version 3.5.0 or higher for the argument --not_mandatory
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ynh_restore_file() {
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# Declare an array to define the options of this helper.
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local legacy_args=odm
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local -A args_array=([o]=origin_path= [d]=dest_path= [m]=not_mandatory)
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local origin_path
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local dest_path
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local not_mandatory
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# Manage arguments with getopts
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ynh_handle_getopts_args "$@"
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origin_path="/${origin_path#/}"
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# Default value for dest_path = /$origin_path
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dest_path="${dest_path:-$origin_path}"
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not_mandatory="${not_mandatory:-0}"
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local archive_path="$YNH_CWD${origin_path}"
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# If archive_path doesn't exist, search for a corresponding path in CSV
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if [ ! -d "$archive_path" ] && [ ! -f "$archive_path" ] && [ ! -L "$archive_path" ]; then
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if [ "$not_mandatory" == "0" ]; then
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archive_path="$YNH_BACKUP_DIR/$(_get_archive_path \"$origin_path\")"
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else
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return 0
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fi
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fi
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# Move the old directory if it already exists
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if [[ -e "${dest_path}" ]]; then
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# Check if the file/dir size is less than 500 Mo
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if [[ $(du --summarize --bytes ${dest_path} | cut --delimiter="/" --fields=1) -le "500000000" ]]; then
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local backup_file="/var/cache/yunohost/appconfbackup/${dest_path}.backup.$(date '+%Y%m%d.%H%M%S')"
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mkdir --parents "$(dirname "$backup_file")"
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mv "${dest_path}" "$backup_file" # Move the current file or directory
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else
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ynh_secure_remove --file=${dest_path}
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fi
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fi
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# Restore origin_path into dest_path
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mkdir --parents $(dirname "$dest_path")
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# Do a copy if it's just a mounting point
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if mountpoint --quiet $YNH_BACKUP_DIR; then
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if [[ -d "${archive_path}" ]]; then
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archive_path="${archive_path}/."
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mkdir --parents "$dest_path"
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fi
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cp --archive "$archive_path" "${dest_path}"
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# Do a move if YNH_BACKUP_DIR is already a copy
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else
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mv "$archive_path" "${dest_path}"
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fi
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# Boring hack for nginx conf file mapped to php7.3
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# Note that there's no need to patch the fpm config because most php apps
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# will call "ynh_add_fpm_config" during restore, effectively recreating the file from scratch
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if [[ "${dest_path}" == "/etc/nginx/conf.d/"* ]] && grep 'php7.3.*sock' "${dest_path}"
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then
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sed -i 's/php7.3/php7.4/g' "${dest_path}"
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fi
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}
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# Calculate and store a file checksum into the app settings
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#
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# usage: ynh_store_file_checksum --file=file
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# | arg: -f, --file= - The file on which the checksum will performed, then stored.
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#
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# $app should be defined when calling this helper
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#
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# Requires YunoHost version 2.6.4 or higher.
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ynh_store_file_checksum() {
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# Declare an array to define the options of this helper.
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local legacy_args=f
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local -A args_array=([f]=file= [u]=update_only)
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local file
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local update_only
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update_only="${update_only:-0}"
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# Manage arguments with getopts
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ynh_handle_getopts_args "$@"
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local checksum_setting_name=checksum_${file//[\/ ]/_} # Replace all '/' and ' ' by '_'
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# If update only, we don't save the new checksum if no old checksum exist
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if [ $update_only -eq 1 ]; then
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local checksum_value=$(ynh_app_setting_get --app=$app --key=$checksum_setting_name)
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if [ -z "${checksum_value}" ]; then
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unset backup_file_checksum
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return 0
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fi
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fi
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ynh_app_setting_set --app=$app --key=$checksum_setting_name --value=$(md5sum "$file" | cut --delimiter=' ' --fields=1)
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if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
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# Using a base64 is in fact more reversible than "replace / and space by _" ... So we can in fact obtain the original file path in an easy reliable way ...
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local file_path_base64=$(echo "$file" | base64 -w0)
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mkdir -p /var/cache/yunohost/appconfbackup/
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cat $file > /var/cache/yunohost/appconfbackup/original_${file_path_base64}
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fi
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# If backup_file_checksum isn't empty, ynh_backup_if_checksum_is_different has made a backup
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if [ -n "${backup_file_checksum-}" ]; then
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# Print the diff between the previous file and the new one.
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# diff return 1 if the files are different, so the || true
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diff --report-identical-files --unified --color=always $backup_file_checksum $file >&2 || true
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fi
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# Unset the variable, so it wouldn't trig a ynh_store_file_checksum without a ynh_backup_if_checksum_is_different before it.
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unset backup_file_checksum
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}
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# Verify the checksum and backup the file if it's different
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#
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# usage: ynh_backup_if_checksum_is_different --file=file
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# | arg: -f, --file= - The file on which the checksum test will be perfomed.
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# | ret: the name of a backup file, or nothing
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#
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# This helper is primarily meant to allow to easily backup personalised/manually
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# modified config files.
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#
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# Requires YunoHost version 2.6.4 or higher.
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ynh_backup_if_checksum_is_different() {
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# Declare an array to define the options of this helper.
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local legacy_args=f
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local -A args_array=([f]=file=)
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local file
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# Manage arguments with getopts
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ynh_handle_getopts_args "$@"
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local checksum_setting_name=checksum_${file//[\/ ]/_} # Replace all '/' and ' ' by '_'
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local checksum_value=$(ynh_app_setting_get --app=$app --key=$checksum_setting_name)
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# backup_file_checksum isn't declare as local, so it can be reuse by ynh_store_file_checksum
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backup_file_checksum=""
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if [ -n "$checksum_value" ]; then # Proceed only if a value was stored into the app settings
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if [ -e $file ] && ! echo "$checksum_value $file" | md5sum --check --status; then # If the checksum is now different
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backup_file_checksum="/var/cache/yunohost/appconfbackup/$file.backup.$(date '+%Y%m%d.%H%M%S')"
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mkdir --parents "$(dirname "$backup_file_checksum")"
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cp --archive "$file" "$backup_file_checksum" # Backup the current file
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ynh_print_warn "File $file has been manually modified since the installation or last upgrade. So it has been duplicated in $backup_file_checksum"
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echo "$backup_file_checksum" # Return the name of the backup file
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if [ ${PACKAGE_CHECK_EXEC:-0} -eq 1 ]; then
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local file_path_base64=$(echo "$file" | base64 -w0)
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if test -e /var/cache/yunohost/appconfbackup/original_${file_path_base64}
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then
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ynh_print_warn "Diff with the original file:"
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diff --report-identical-files --unified --color=always /var/cache/yunohost/appconfbackup/original_${file_path_base64} $file >&2 || true
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fi
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fi
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fi
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fi
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}
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# Delete a file checksum from the app settings
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#
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# usage: ynh_delete_file_checksum --file=file
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# | arg: -f, --file= - The file for which the checksum will be deleted
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#
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# $app should be defined when calling this helper
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#
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# Requires YunoHost version 3.3.1 or higher.
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ynh_delete_file_checksum() {
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# Declare an array to define the options of this helper.
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local legacy_args=f
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local -A args_array=([f]=file=)
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local file
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# Manage arguments with getopts
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ynh_handle_getopts_args "$@"
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local checksum_setting_name=checksum_${file//[\/ ]/_} # Replace all '/' and ' ' by '_'
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ynh_app_setting_delete --app=$app --key=$checksum_setting_name
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}
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|
|
# Checks a backup archive exists
|
|
#
|
|
# [internal]
|
|
#
|
|
ynh_backup_archive_exists() {
|
|
yunohost backup list --output-as json --quiet \
|
|
| jq -e --arg archive "$1" '.archives | index($archive)' >/dev/null
|
|
}
|
|
|
|
# Make a backup in case of failed upgrade
|
|
#
|
|
# [packagingv1]
|
|
#
|
|
# usage: ynh_backup_before_upgrade
|
|
#
|
|
# Usage in a package script:
|
|
# ```
|
|
# ynh_backup_before_upgrade
|
|
# ynh_clean_setup () {
|
|
# ynh_restore_upgradebackup
|
|
# }
|
|
# ynh_abort_if_errors
|
|
# ```
|
|
#
|
|
# Requires YunoHost version 2.7.2 or higher.
|
|
ynh_backup_before_upgrade() {
|
|
if [ ! -e "/etc/yunohost/apps/$app/scripts/backup" ]; then
|
|
ynh_print_warn --message="This app doesn't have any backup script."
|
|
return
|
|
fi
|
|
backup_number=1
|
|
local old_backup_number=2
|
|
local app_bck=${app//_/-} # Replace all '_' by '-'
|
|
NO_BACKUP_UPGRADE=${NO_BACKUP_UPGRADE:-0}
|
|
|
|
if [ "$NO_BACKUP_UPGRADE" -eq 0 ]; then
|
|
# Check if a backup already exists with the prefix 1
|
|
if ynh_backup_archive_exists "$app_bck-pre-upgrade1"; then
|
|
# Prefix becomes 2 to preserve the previous backup
|
|
backup_number=2
|
|
old_backup_number=1
|
|
fi
|
|
|
|
# Create backup
|
|
BACKUP_CORE_ONLY=1 yunohost backup create --apps $app --name $app_bck-pre-upgrade$backup_number --debug
|
|
if [ "$?" -eq 0 ]; then
|
|
# If the backup succeeded, remove the previous backup
|
|
if ynh_backup_archive_exists "$app_bck-pre-upgrade$old_backup_number"; then
|
|
# Remove the previous backup only if it exists
|
|
yunohost backup delete $app_bck-pre-upgrade$old_backup_number >/dev/null
|
|
fi
|
|
else
|
|
ynh_die --message="Backup failed, the upgrade process was aborted."
|
|
fi
|
|
else
|
|
ynh_print_warn --message="\$NO_BACKUP_UPGRADE is set, backup will be avoided. Be careful, this upgrade is going to be operated without a security backup"
|
|
fi
|
|
}
|
|
|
|
# Restore a previous backup if the upgrade process failed
|
|
#
|
|
# [packagingv1]
|
|
#
|
|
# usage: ynh_restore_upgradebackup
|
|
#
|
|
# Usage in a package script:
|
|
# ```
|
|
# ynh_backup_before_upgrade
|
|
# ynh_clean_setup () {
|
|
# ynh_restore_upgradebackup
|
|
# }
|
|
# ynh_abort_if_errors
|
|
# ```
|
|
#
|
|
# Requires YunoHost version 2.7.2 or higher.
|
|
ynh_restore_upgradebackup() {
|
|
ynh_print_err --message="Upgrade failed."
|
|
local app_bck=${app//_/-} # Replace all '_' by '-'
|
|
|
|
NO_BACKUP_UPGRADE=${NO_BACKUP_UPGRADE:-0}
|
|
|
|
if [ "$NO_BACKUP_UPGRADE" -eq 0 ]; then
|
|
# Check if an existing backup can be found before removing and restoring the application.
|
|
if ynh_backup_archive_exists "$app_bck-pre-upgrade$backup_number"; then
|
|
# Remove the application then restore it
|
|
yunohost app remove $app
|
|
# Restore the backup
|
|
yunohost backup restore $app_bck-pre-upgrade$backup_number --apps $app --force --debug
|
|
if [[ -d /etc/yunohost/apps/$app ]]
|
|
then
|
|
ynh_die --message="The app was restored to the way it was before the failed upgrade."
|
|
else
|
|
ynh_die --message="Uhoh ... Yunohost failed to restore the app to the way it was before the failed upgrade :|"
|
|
fi
|
|
fi
|
|
else
|
|
ynh_print_warn --message="\$NO_BACKUP_UPGRADE is set, that means there's no backup to restore. You have to fix this upgrade by yourself !"
|
|
fi
|
|
}
|