51733e5623
Add facility to borg-backup role to run a command and save the output of it to a separate archive file during the backup process. This is mostly useful for database backups. Compressed on-disk logs are terrible for differential backups because revisions have essentially no common data. By saving the uncompressed stream directly from mysqldump, we allow borg the chance to de-duplicate, saving considerable space on the backup servers. This is implemented for our ansible-managed servers currently doing dumps. We also add it to the testinfra. This also separates the archive names for the filesystem and stream backup with unique prefixes so they can be pruned separately. Otherwise we end up keeping only one of the stream or filesystem backups which isn't the intention. However, due to issues with --append-only mode we are not issuing prune commands at this time. Note the updated dump commands are updated slightly, particularly with "--skip-extended-insert" which was suggested by mordred and significantly improves incremental diff-ability by being slightly more verbose but keeping much more of the output stable across dumps. Change-Id: I500062c1c52c74a567621df9aaa716de804ffae7
66 lines
1.9 KiB
Django/Jinja
66 lines
1.9 KiB
Django/Jinja
#!/bin/bash
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# Flags based on
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# https://borgbackup.readthedocs.io/en/stable/quickstart.html
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if [ -z "$1" ]; then
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echo "Must specify backup host"
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exit 1
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fi
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BORG="/opt/borg/bin/borg"
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BORG_CREATE="${BORG} create --verbose --filter AME --list --stats --show-rc --compression lz4 --exclude-caches "
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# Setting this, so the repo does not need to be given on the commandline:
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export BORG_REPO="ssh://{{ borg_username}}@${1}/opt/backups/{{ borg_username }}/backup"
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# some helpers and error handling:
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info() { printf "\n%s %s\n\n" "$( date )" "$*" >&2; }
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trap 'echo $( date ) Backup interrupted >&2; exit 2' INT TERM
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info "Starting backup"
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# This avoids UI prompts when first accessing the remote repository
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export BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK=1
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# Backup the most important directories into an archive named after
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# the machine this script is currently running on:
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${BORG_CREATE} \
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{% for item in borg_backup_excludes + borg_backup_excludes_extra -%}
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--exclude '{{ item }}' \
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{% endfor -%}
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::'{hostname}-filesystem-{now}' \
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{% for item in borg_backup_dirs + borg_backup_dirs_extra -%}
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{{ item }} {{ '\\' if not loop.last }}
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{% endfor -%}
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backup_exit=$?
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for f in $(shopt -s nullglob; echo /etc/borg-streams/*)
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do
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stream_name=$(basename $f)
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info "Backing up stream archive $stream_name"
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bash $f | ${BORG_CREATE} --stdin-name ${stream_name} \
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::"{hostname}-${stream_name}-{now}" -
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if [[ ${PIPESTATUS[0]} -ne 0 ]]; then
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info "Streaming script ${f} failed!"
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stream_exit=${PIPESTATUS[0]}
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elif [[ ${PIPESTATUS[1]} -ne 1 ]]; then
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info "Borg failed!"
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stream_exit=${PIPESTATUS[1]}
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else
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stream_exit=0
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fi
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(( backup_exit = backup_exit || stream_exit ))
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done
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if [ ${backup_exit} -eq 0 ]; then
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info "Backup finished successfully"
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else
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info "Backup finished with errors"
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fi
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exit ${backup_exit}
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