Daily&Weekly Backup via systemd

Overview

マシンを変えたのでcronで行っていたdaily/weeklyのbackupをsystemdで行うようにしたのでメモのため記事にしておこうと考えた。

Environment

• Ubuntu18.04 (というかsysmtedであれば動くはず)

Procedure

Dump Scriptの準備

/usr/local/binに以下を配置。(systemd serviceファイルにコマンド直書きでもいいが、あとでやりたいことが増えた場合にscriptのほうが良さそうなので、backendはscriptにしておく)

/usr/local/bin/backup-daily.sh

#!/bin/bash

echo "Dumping backup in daily, /dev/nvme0n1p2 will be in /mnt/data1/dump-nvme0n1p2.daily"

dump -0uf /mnt/data1/dump-nvme0n1p2.daily /dev/nvme0n1p2

/usr/local/bin/backup-weekly.sh

#!/bin/bash

echo "Dumping backup in weekly, /dev/nvme0n1p2 will be in /mnt/data1/dump-nvme0n1p2.weekly"

dump -0uf /mnt/data1/dump-nvme0n1p2.weekly /dev/nvme0n1p2

※(もちろんだが、)dumpの保存先のマウントポイントは必要に応じて準備しておくこと。

systemd serviceとtimer

serviceとtimerファイルを以下のように準備

>ls -lt  /etc/systemd/system/backup-*
-rw-r--r-- 1 root root 133 Mar 13 12:20 /etc/systemd/system/backup-weekly.service
-rw-r--r-- 1 root root 122 Mar 13 12:20 /etc/systemd/system/backup-weekly.timer
-rw-r--r-- 1 root root 148 Mar 13 12:20 /etc/systemd/system/backup-daily.timer
-rw-r--r-- 1 root root 131 Mar 13 11:51 /etc/systemd/system/backup-daily.service

それぞれの中身は以下。

/etc/systemd/system/backup-weekly.service

[Unit]
Description=Weekly backup activities
ConditionACPower=true

[Service]
ExecStart=/usr/local/bin/backup-weekly.sh
Type=oneshot

/etc/systemd/system/backup-weekly.timer

[Unit]
Description=Weekly backup activities

[Timer]
OnCalendar=weekly
Persistent=true

[Install]
WantedBy=timers.target

※weekly=Mon --* 00:00:00

/etc/systemd/system/backup-daily.service

[Unit]
Description=Daily backup activities
ConditionACPower=true

[Service]
ExecStart=/usr/local/bin/backup-daily.sh
Type=oneshot

/etc/systemd/system/backup-daily.timer

[Unit]
Description=Daily backup activities

[Timer]
OnCalendar=*-*-* 02:00
RandomizedDelaySec=1h
Persistent=true

[Install]
WantedBy=timers.target

systemd-timerをenable

sudo systemctl enable backup-daily.timer
sudo systemctl enable backup-weekly.timer

補足

ログを見たいときは、

systemctl status backup-daily.timer
systemctl status backup-daily.service

systemctl status backup-weekly.timer
systemctl status backup-weekly.service