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Merge pull request #78 from Hurricos/lvm
[WIP] feat: lvm: Add lvm-based backup functionality
This commit is contained in:
commit
7ec0667ac6
2 changed files with 98 additions and 9 deletions
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@ -1,8 +1,15 @@
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[Unit]
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Description=Backup {{ item.name }} using restic
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{% if item.lvm is defined %}
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Conflicts=fstrim.service
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After=fstrim.timer
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{% endif %}
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[Service]
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Type=oneshot
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{% if item.lvm is defined %}
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PrivateMounts=on
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{% endif %}
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ExecStart={{ restic_script_dir }}/backup-{{ item.name }}.sh
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TimeoutStartSec=0
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Environment="CRON=true"
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@ -67,6 +67,77 @@ export B2_ACCOUNT_KEY={{ restic_repos[item.repo].b2_account_key }}
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BACKUP_SOURCE={{ item.src }}
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{% endif %}
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{% if item.lvm is defined %}
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# Set up functions for LVM.
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function mount_opt_map {
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mount_type="$1"
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case "$mount_type" in
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xfs)
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echo "noatime,nouuid"
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;;
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ext4)
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echo "noatime"
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;;
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*)
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echo "noatime"
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esac
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}
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function prepare_vol {
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local path="$1"
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[ -d "$path" ] || path="$(dirname "$path")"
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if [ "$path" == '/' ] ; then
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mkdir -p /rootfs;
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newpath='/rootfs';
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else
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newpath="$path";
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fi
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{
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local source="$(findmnt -J -T ${path} | jq -r '.filesystems[0].source')"
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local target="$(findmnt -J -T ${path} | jq -r '.filesystems[0].target')"
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subdir=${path##$target}
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echo "Creating snapshot ..."
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lvcreate -y -L "${size:-10G}" -s -n "${source}_snap" "${source}"
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local tmpdir="$(mktemp -d)"
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local fs="$(lsblk -J --fs "$source" | jq -r '.blockdevices[0]|.fstype')"
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echo "Identified fstype: $fs; using opts $(mount_opt_map "$fs") ..."
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mount -t "$fs" \
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-o "$(mount_opt_map "$fs")" \
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--make-private \
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"${source}_snap" "${tmpdir}"
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mount --bind --make-private "${tmpdir}/${subdir}" "${newpath}"
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}
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}
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function cleanup_vol {
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local path="$1"
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[ -d "$path" ] || path="$(dirname "$path")"
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if [ "$path" == '/' ] ; then
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newpath='/rootfs';
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else
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newpath="$path";
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fi
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{
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local source="$(findmnt -v -J -T "${newpath}" | jq -r '.filesystems[]|.source' | grep '_snap$')"
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if ! grep -q '_snap$' <<< $source; then
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echo "Snapshot for ${path} could not be found (found: ${source}). Exiting!" && return 1;
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fi
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echo "Cleaning up mount ..."
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umount "${newpath}"
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echo "Cleaning up snapshot ..."
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umount "${source}"
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lvremove -y "${source}";
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}
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}
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{% endif %}
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set -uxo pipefail
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{#
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@ -155,25 +226,36 @@ fi
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{% if item.exclude is defined %}{{ exclude(item.exclude) }}{% endif %} \
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$@ \
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{% else %}
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{{ restic_install_path }}/restic backup $BACKUP_SOURCE $MODE_TAG \
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{
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{% if item.lvm is defined %}prepare_vol $BACKUP_SOURCE &&{% endif %}
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{{ restic_install_path }}/restic backup {% if item.lvm is defined and item.src == '/' %}/rootfs{% endif %}$BACKUP_SOURCE $MODE_TAG \
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{{ tags(item.tags) }} \
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{% if item.exclude is defined %}{{ exclude(item.exclude) }}{% endif %} \
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$@ \
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$@
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} \
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{% endif %} {{ backup_output_log }}
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if [[ $? -eq 0 ]]
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then
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echo "$(date -u '+%Y-%m-%d %H:%M:%S') OK" {{ backup_result_log }}
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else
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echo "$(date -u '+%Y-%m-%d %H:%M:%S') ERROR" {{ backup_result_log }}
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case $? in
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0)
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echo "$(date -u '+%Y-%m-%d %H:%M:%S') OK" {{ backup_result_log }}
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;;
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3)
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echo "$(date -u '+%Y-%m-%d %H:%M:%S') WARNING" {{ backup_result_log }}
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;;
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*)
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echo "$(date -u '+%Y-%m-%d %H:%M:%S') ERROR" {{ backup_result_log }}
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{% if item.mail_on_error is defined and item.mail_on_error == true %}
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mail -s "restic backup failed on {{ ansible_hostname }}" {{ item.mail_address }} <<< "Something went wrong while running restic backup script running at {{ ansible_hostname }} at $(date -u '+%Y-%m-%d %H:%M:%S').
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{%- if item.src is defined -%}
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{{ ' ' }}We tried to backup '{{ item.src }}'.
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{%- endif -%}
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{{ ' ' }}Please repair the restic-{{ item.name | replace(' ', '') }} job."
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{% endif %}
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fi
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{% endif %}
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esac
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{% if item.lvm is defined %}
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cleanup_vol $BACKUP_SOURCE
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{% endif %}
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{#
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