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coreos-home-server
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Implement minor improvements for volume backups 

Container volume backups will now be skipped if no changes have been
made in source files against the latest backup. In addition the default
timer has been changed for performing backups once a day, at 02:00,
likely a time where there's less traffic on the server.
This commit is contained in:
Alex Palaistras 2022-02-05 16:01:22 +00:00
parent c8eed1c3db
commit 4636730d32
3 changed files with 10 additions and 8 deletions
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10
host/base/systemd/container-volume-backup@.service
View File

@ -7,11 +7,13 @@ SyslogIdentifier=%N
ExecStartPre=/bin/install --mode 0700 --directory %S/backups/coreos-home-server/%i
ExecStart=/bin/podman run --replace --rm --name %p-%i --entrypoint /bin/bash \
--volume %i:/data:z,ro \
--volume %S/backups/coreos-home-server/%i:/backups:z \
--volume %S/backups/coreos-home-server/%i:/backup:z \
docker.io/debian:bullseye-slim -c \
'name="%i-$(date +%%w%%H)" && \
tar -cvpzf "/backups/$name.tar.gz" -C /data . && \
ln --force "/backups/$name.tar.gz" /backups/%i-latest.tar.gz'
'test -f /backup/%i-latest.tar.gz && \
test "$(find /data -type f -newer /backup/%i-latest.tar.gz -print -quit | wc -l)" -eq 0 && exit 0; \
name="%i-$(date +%%w%%H)" && \
tar --verbose --create --gzip --file "/backup/$name.tar.gz" --directory /data . && \
ln --force "/backup/$name.tar.gz" /backup/%i-latest.tar.gz'
[Install]
WantedBy=multi-user.target

4
host/base/systemd/container-volume-backup@.timer
View File

@ -2,8 +2,8 @@
Description=Scheduled Backup for Container Volume %i
[Timer]
OnCalendar=00/12:30
RandomizedDelaySec=15m
OnCalendar=02:00
RandomizedDelaySec=10m
[Install]
WantedBy=timers.target

4
host/base/systemd/container-volume-restore@.service
View File

@ -7,10 +7,10 @@ Type=oneshot
SyslogIdentifier=%N
ExecStart=/bin/podman run --replace --rm --name %p-%i --entrypoint /bin/bash \
--volume %i:/data:z \
--volume %S/backups/coreos-home-server/%i:/backups:z,ro \
--volume %S/backups/coreos-home-server/%i:/backup:z,ro \
docker.io/debian:bullseye-slim -c \
'test -n "$(ls -A /data)" && echo "Volume %i is not empty, skipping." && exit 0; \
tar -xvpf "/backups/%i-latest.tar.gz" -C /data'
tar --verbose --extract --file "/backup/%i-latest.tar.gz" --directory /data'
[Install]
WantedBy=multi-user.target