From e017320e8c78d023edc3887538792102ac0f7d94 Mon Sep 17 00:00:00 2001
From: valentin <valentin@aztrom.fr>
Date: Sat, 11 May 2024 17:47:53 +0200
Subject: [PATCH] adding postgresql backup script

---
 midgard/backup/install              | 10 +++++++++
 midgard/backup/mkpsqlbackup         | 35 +++++++++++++++++++++++++++++
 midgard/backup/mkpsqlbackup.conf    |  3 +++
 midgard/backup/mkpsqlbackup.service |  5 +++++
 midgard/backup/mkpsqlbackup.timer   | 10 +++++++++
 5 files changed, 63 insertions(+)
 create mode 100755 midgard/backup/install
 create mode 100644 midgard/backup/mkpsqlbackup
 create mode 100644 midgard/backup/mkpsqlbackup.conf
 create mode 100644 midgard/backup/mkpsqlbackup.service
 create mode 100644 midgard/backup/mkpsqlbackup.timer

diff --git a/midgard/backup/install b/midgard/backup/install
new file mode 100755
index 0000000..a5b59c4
--- /dev/null
+++ b/midgard/backup/install
@@ -0,0 +1,10 @@
+#!/bin/sh
+
+set -e
+
+BASEDIR=$(dirname "$0")
+
+install -o root -g root -m 755 "$BASEDIR/mkpsqlbackup" /usr/local/bin/mkpsqlbackup
+install -o root -g root -m 644 "$BASEDIR/mkpsqlbackup.conf" /etc/mkpsqlbackup.conf
+install -o root -g root -m 644 "$BASEDIR/mkpsqlbackup.service" /etc/systemd/system/mkpsqlbackup.service
+install -o root -g root -m 644 "$BASEDIR/mkpsqlbackup.timer" /etc/systemd/system/mkpsqlbackup.timer
diff --git a/midgard/backup/mkpsqlbackup b/midgard/backup/mkpsqlbackup
new file mode 100644
index 0000000..9d17125
--- /dev/null
+++ b/midgard/backup/mkpsqlbackup
@@ -0,0 +1,35 @@
+#!/bin/sh
+
+set -e
+
+# Default configuration
+DATABASES=''
+BACKUP_DIR=/data/backup/postgresql
+RETENTION_DAYS=7
+
+if ! source /etc/mkpsqlbackup.conf ; then
+	echo '[MKPSQLBACKUP] : Unable to load configuration file' >&2
+	exit 1
+fi
+
+if [ "$(id -un)" != 'postgres' ] ; then
+	echo '[MKPSQLBACKUP] : This script must be run as postgres user' >&2
+	exit 2
+fi
+
+FINAL_BACKUP_DIR="$BACKUP_DIR/-$(date '+%Y-%m-%d')"
+echo "[MKPSQLBACKUP] : Creating backup directory $FINAL_BACKUP_DIR"
+if ! mkdir -p "$FINAL_BACKUP_DIR" ; then
+	echo "[MKPSQLBACKUP] : Unable to create backup directory $FINAL_BACKUP_DIR"
+	exit 3
+fi
+
+for db in DATABASES ; do
+	echo "[MKPSQLBACKUP] : Backup of $db"
+	if ! pg_dump -Fc "$db" -f "$FINAL_BACKUP_DIR/$db" ; then
+		echo "[MKPSQLBACKUP] : Unable to backup database $db" >&2
+	fi
+done
+
+echo '[MKPSQLBACKUP] : Purging old backups'
+find "$BACKUP_DIR" -maxdepth 1 mindepth 1 -mtime +"$RETENTION_DAYS" -exec rm -rf '{}' ';'
diff --git a/midgard/backup/mkpsqlbackup.conf b/midgard/backup/mkpsqlbackup.conf
new file mode 100644
index 0000000..686e2e6
--- /dev/null
+++ b/midgard/backup/mkpsqlbackup.conf
@@ -0,0 +1,3 @@
+DATABASES=''
+BACKUP_DIR=/data/backup/postgresql
+RETENTION_DAYS=7
diff --git a/midgard/backup/mkpsqlbackup.service b/midgard/backup/mkpsqlbackup.service
new file mode 100644
index 0000000..56282b2
--- /dev/null
+++ b/midgard/backup/mkpsqlbackup.service
@@ -0,0 +1,5 @@
+[Unit]
+Description=Performing PostgreSQL database backups
+
+[Service]
+ExecStart=/usr/local/bin/mkpsqlbackup
diff --git a/midgard/backup/mkpsqlbackup.timer b/midgard/backup/mkpsqlbackup.timer
new file mode 100644
index 0000000..f581c22
--- /dev/null
+++ b/midgard/backup/mkpsqlbackup.timer
@@ -0,0 +1,10 @@
+[Unit]
+Description=Performing PostgreSQL database backups every days at 3:00am
+
+[Timer]
+# Run every days at 3:00am
+OnCalendar=*-*-* 3:00:00
+Persistent=true
+
+[Install]
+WantedBy=timers.target