commit 481d797c7277c74f2464edfad18312ebbcd47175
Author: Blallo <blallo@autistici.org>
Date:   Sun Nov 18 10:31:35 2018 +0100

    Init and added backup stuff for mastodon

diff --git a/README.md b/README.md
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+# A small set of server-side utilities
+
+Divided by server.
diff --git a/mastodon/README.md b/mastodon/README.md
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+# Utilities to keep mastodon instance clean (and hopefully running)
+
+## Postgres backup
+
+(All the mastodon installation is in `/home/mastodon/live` running as `mastodon`).
+
+Create a `/home/mastodon/.bin` directory and place there the backup script (`dobackup.sh`)
+Create also:
+
+ - `/home/mastodon/.bu`
+ - `/home/mastodon/.bu/monthly`
+
+Then place in (assuming we are on a debian-like distro) `/lib/systemd/system` the following:
+
+ - `pg_backup_daily.service`
+ - `pg_backup_daily.timer`
+ - `pg_backup_monthly.service`
+ - `pg_backup_monthly.timer`
+
+
+And start them (as root):
+
+```
+$ systemctl enable pg_backup_*.timer
+```
diff --git a/mastodon/dobackup.sh b/mastodon/dobackup.sh
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+#!/bin/bash
+
+BUDIR="/home/mastodon/.bu/"
+
+pg_dump mastodon_production > "${BUDIR}/$(date +%Y%m%d)-mastodon_production.sql"
diff --git a/mastodon/pg_backup_daily.service b/mastodon/pg_backup_daily.service
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+[Unit]
+Description=Backup postgres database mastodon_production
+
+[Service]
+Type=oneshot
+User=mastodon
+Group=mastodon
+ExecStart=/home/mastodon/.bin/dobackup.sh
diff --git a/mastodon/pg_backup_daily.timer b/mastodon/pg_backup_daily.timer
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+[Unit]
+Description=Backup postgres database mastodon_production
+
+[Timer]
+OnCalendar=daily
+Persistent=true
+
+[Install]
+WantedBy=timers.target
diff --git a/mastodon/pg_backup_monthly.service b/mastodon/pg_backup_monthly.service
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+++ b/mastodon/pg_backup_monthly.service
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+[Unit]
+Description=Backup postgres database mastodon_production (monthly)
+
+[Service]
+Type=oneshot
+User=mastodon
+Group=mastodon
+ExecStart=/bin/bash -c "mv $(ls -rt /home/mastodon/.bu/*.sql|tail -1) /home/mastodon/.bu/monthly/"
diff --git a/mastodon/pg_backup_monthly.timer b/mastodon/pg_backup_monthly.timer
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+[Unit]
+Description=Backup postgres database mastodon_production (monthly)
+
+[Timer]
+OnCalendar=monthly
+Persistent=true
+
+[Install]
+WantedBy=timers.target