bcf37e5016
The original script used --incremental-history-name and compressed full backups as gzip streams. This failed because mariabackup expects an actual decompressed base directory for incremental backups. This patch: - Decompresses the latest full backup into a temporary directory - Uses that as --incremental-basedir - Aligns the backup flow with official Mariabackup documentation: https://mariadb.com/kb/en/incremental-backup-and-restore-with-mariabackup/ This makes the incremental process reliable and fully supported. Closes-Bug: #2111620 Change-Id: I562ce5e54752015863a20bf113bce74a69e02331
74 lines
1.9 KiB
Bash
74 lines
1.9 KiB
Bash
#!/usr/bin/env bash
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set -eu
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set -o pipefail
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# Execute a full backup
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backup_full() {
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echo "Taking a full backup"
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LAST_FULL_DATE=$(date +%d-%m-%Y-%s)
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BACKUP_FILE="mysqlbackup-${LAST_FULL_DATE}.qp.xbc.xbs.gz"
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BACKUP_PATH="$BACKUP_DIR/full-${LAST_FULL_DATE}"
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mkdir -p "$BACKUP_PATH"
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mariabackup \
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--defaults-file=/etc/mysql/my.cnf \
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--backup \
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--stream=xbstream \
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--history=$LAST_FULL_DATE | gzip > \
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"$BACKUP_PATH/$BACKUP_FILE"
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echo "$BACKUP_PATH/$BACKUP_FILE" > "$BACKUP_DIR/last_full_file"
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}
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# Execute an incremental backup
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backup_incremental() {
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echo "Taking an incremental backup"
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if [ ! -r "$BACKUP_DIR/last_full_file" ]; then
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echo "Error: No full backup file found."
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exit 1
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fi
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FULL_BACKUP_FILE=$(cat "$BACKUP_DIR/last_full_file")
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LAST_FULL_DATE=$(basename "$(dirname "$FULL_BACKUP_FILE")" | sed 's/^full-//')
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NOW=$(date +%H-%M-%S-%d-%m-%Y)
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INCR_DIR="$BACKUP_DIR/incr-${NOW}-since-${LAST_FULL_DATE}"
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mkdir -p "$INCR_DIR"
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TMP_BASEDIR=$(mktemp -d)
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echo "Decompressing full backup to temp dir: $TMP_BASEDIR"
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gunzip -c "$FULL_BACKUP_FILE" | mbstream -x -C "$TMP_BASEDIR"
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mariabackup \
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--defaults-file=/etc/mysql/my.cnf \
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--backup \
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--stream=xbstream \
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--incremental-basedir="$TMP_BASEDIR" \
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--history="incr-${NOW}" | gzip > \
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"$INCR_DIR/incremental-${NOW}-mysqlbackup-${LAST_FULL_DATE}.qp.xbc.xbs.gz"
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rm -rf "$TMP_BASEDIR"
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}
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BACKUP_DIR=/backup/
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cd "$BACKUP_DIR"
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if [ -n "${BACKUP_TYPE:-}" ]; then
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case "$BACKUP_TYPE" in
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"full")
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backup_full
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;;
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"incremental")
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backup_incremental
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;;
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*)
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echo "Only full or incremental options are supported."
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exit 1
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;;
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esac
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else
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echo "You need to specify either full or incremental backup options."
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exit 1
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fi
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