Marek Miklewicz
100 lines
3.0 KiB
Bash
100 lines
3.0 KiB
Bash
#!/bin/bash
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set -euo pipefail
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SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
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# shellcheck source=./mysql_common.sh
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source "$SCRIPT_DIR/mysql_common.sh"
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BASE_DIR="${BASE_DIR:-/home/admin/mysql_backup}"
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DATE_FORMAT="${DATE_FORMAT:-%d-%m-%Y}"
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ADD_TIME="${ADD_TIME:-0}"
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RETENTION="${RETENTION:-7}"
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ENABLE_COMPRESSION="${ENABLE_COMPRESSION:-1}"
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LOG_FILE="${LOG_FILE:-/var/log/mysql_backup.log}"
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timestamp() {
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date '+%Y-%m-%d %H:%M:%S'
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}
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log() {
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printf '[%s] %s\n' "$(timestamp)" "$*" | tee -a "$LOG_FILE"
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}
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dump_globals_file() {
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local output_file="$1"
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local tmp_file
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tmp_file="$(mktemp)"
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{
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echo "-- Global users and grants for MySQL"
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echo "-- Generated at $(timestamp)"
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} > "$tmp_file"
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while IFS=$'\t' read -r db_user db_host; do
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[ -n "$db_user" ] || continue
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[ -n "$db_host" ] || continue
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printf "DROP USER IF EXISTS '%s'@'%s';\n" "$db_user" "$db_host" >> "$tmp_file"
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mysql_exec mysql -Nse "SHOW CREATE USER '${db_user}'@'${db_host}'" >> "$tmp_file" || true
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echo ";" >> "$tmp_file"
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while IFS= read -r grant_line; do
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[ -n "$grant_line" ] || continue
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printf "%s;\n" "$grant_line" >> "$tmp_file"
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done < <(mysql_exec mysql -Nse "SHOW GRANTS FOR '${db_user}'@'${db_host}'" || true)
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echo >> "$tmp_file"
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done < <(
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mysql_exec mysql -Nse "
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SELECT user, host
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FROM mysql.user
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WHERE user <> ''
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AND user NOT IN ('mysql.sys', 'mysql.session', 'mysql.infoschema', 'mariadb.sys')
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ORDER BY user, host
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" || true
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)
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if [ "$ENABLE_COMPRESSION" = "1" ]; then
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gzip -9 < "$tmp_file" > "$output_file"
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else
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mv "$tmp_file" "$output_file"
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return 0
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fi
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rm -f "$tmp_file"
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}
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mysql_load_alt_credentials
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mkdir -p "$BASE_DIR"
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if [ "$ADD_TIME" = "1" ]; then
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DATE_STR="$(date +"${DATE_FORMAT}_%H-%M")"
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else
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DATE_STR="$(date +"${DATE_FORMAT}")"
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fi
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BACKUP_DIR="${BASE_DIR}/${DATE_STR}"
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mkdir -p "$BACKUP_DIR"
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log "Start backupu MySQL do ${BACKUP_DIR}"
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GLOBALS_FILE="${BACKUP_DIR}/_globals.sql"
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if [ "$ENABLE_COMPRESSION" = "1" ]; then
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GLOBALS_FILE="${GLOBALS_FILE}.gz"
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fi
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dump_globals_file "$GLOBALS_FILE"
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log "Zapisano ${GLOBALS_FILE##*/}"
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while IFS= read -r db_name; do
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[ -n "$db_name" ] || continue
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target_file="${BACKUP_DIR}/${db_name}.sql"
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if [ "$ENABLE_COMPRESSION" = "1" ]; then
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mysqldump_exec --single-transaction --skip-lock-tables --routines --triggers --events --databases "$db_name" | gzip -9 > "${target_file}.gz"
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log "Backup ${db_name} -> ${target_file##*/}.gz"
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else
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mysqldump_exec --single-transaction --skip-lock-tables --routines --triggers --events --databases "$db_name" > "$target_file"
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log "Backup ${db_name} -> ${target_file##*/}"
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fi
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done < <(mysql_non_system_databases)
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if [ "$RETENTION" -gt 0 ]; then
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find "$BASE_DIR" -mindepth 1 -maxdepth 1 -type d -mtime +"$RETENTION" -exec rm -rf {} +
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fi
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log "Backup MySQL zakończony."
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