Added backup script

1 files changed, 79 insertions, 0 deletions

diff --git a/backup.sh b/backup.sh
new file mode 100644
index 0000000..4970f14
--- /dev/null
+++ b/backup.sh
@@ -0,0 +1,79 @@
+#!/bin/bash
+# Script für inkrementelles Backup mit 30-tägigem Vollbackup unter Nutzung von secrets.json
+
+### JSON einlesen ###
+BASE_DIR="/root/scripts"
+CONFIG_JSON="${BASE_DIR}/config.json"
+
+BACKUPDIR=$(jq -r '.backup.backup_dir' "$CONFIG_JSON")
+ROTATEDIR=$(jq -r '.backup.rotate_dir' "$CONFIG_JSON")
+TIMESTAMP=$(jq -r '.backup.timestamp_file' "$CONFIG_JSON")
+SOURCE_FILE=$(jq -r '.backup.source_file' "$CONFIG_JSON")
+EXCLUDE_FILE=$(jq -r '.backup.exclude_file' "$CONFIG_JSON")
+
+DATUM="$(date +%Y-%m-%d)"
+ZEIT="$(date +%H-%M-%S-%N)"
+
+SOURCE=()
+EXCLUDE=()
+
+### Quellen einlesen ###
+while IFS= read -r line || [ -n "$line" ]; do
+    [[ -z "$line" ]] && continue
+    if [ -e "$line" ]; then
+        SOURCE+=("$line")
+    else
+        echo "Warnung: '$line' existiert nicht und wird übersprungen."
+    fi
+done < "$SOURCE_FILE"
+
+### Ausnahmen einlesen ###
+while IFS= read -r line || [ -n "$line" ]; do
+    [[ -z "$line" ]] && continue
+    if [ -e "$line" ]; then
+        EXCLUDE+=("--exclude=$line")
+    else
+        echo "Warnung: '$line' existiert nicht und wird übersprungen."
+    fi
+done < "$EXCLUDE_FILE"
+
+cd /
+
+mkdir -p "${BACKUPDIR}"
+if [ ! -d "${BACKUPDIR}" ]; then
+    echo "Fehler: Backupverzeichnis konnte nicht erstellt werden!"
+    exit 1
+fi
+
+set -- ${BACKUPDIR}/backup-??.tar.zst
+lastname=${!#}
+backupnr=${lastname##*backup-}
+backupnr=${backupnr%%.*}
+backupnr=${backupnr//\?/0}
+backupnr=$((10#${backupnr}))
+
+if [ "$((backupnr++))" -ge 30 ]; then
+    mkdir -p "${ROTATEDIR}/${DATUM}-${ZEIT}"
+    if [ ! -d "${ROTATEDIR}/${DATUM}-${ZEIT}" ]; then
+        echo "Fehler: Rotateverzeichnis konnte nicht erstellt werden!"
+        exit 1
+    else
+        mv ${BACKUPDIR}/* "${ROTATEDIR}/${DATUM}-${ZEIT}"
+        docker exec mastodon-db-1 pg_dumpall -U postgres | zstd -9 > "${ROTATEDIR}/${DATUM}-${ZEIT}/backup_mastodon-db-1.sql.zst"
+        pg_dumpall -U postgres | zstd -9 > "${ROTATEDIR}/${DATUM}-${ZEIT}/backup_db.sql.zst"
+    fi
+
+    if [ $? -ne 0 ]; then
+        echo "Fehler beim Verschieben der Backups!"
+        exit 1
+    else
+        backupnr=1
+    fi
+fi
+
+backupnr=$(printf "%02d" "$backupnr")
+filename="backup-${backupnr}.tar.zst"
+
+tar "${EXCLUDE[@]}" -v -c -p -I "zstd -9 -T1" -f "${BACKUPDIR}/${filename}" -g "${BACKUPDIR}/${TIMESTAMP}" "${SOURCE[@]}"
+
+find /var/log -type f \( -name "*.log" -o -name "*.log.*" \) ! -name "*.gz" -exec truncate -s 0 {} \; -o -name "*.gz" -exec rm -f {} \;
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