hello-dd-code
62 lines
2.2 KiB
Bash
Executable File
62 lines
2.2 KiB
Bash
Executable File
#!/usr/bin/env bash
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set -euo pipefail
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# 支持两种模式：
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# 1) 本机 mysql/mysqldump：
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# MYSQL_HOST MYSQL_PORT MYSQL_USER MYSQL_PASSWORD MYSQL_DATABASE
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# 2) 容器内执行（推荐在无本地 mysql 客户端时使用）：
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# MYSQL_CONTAINER=<container_name>
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MYSQL_HOST="${MYSQL_HOST:-127.0.0.1}"
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MYSQL_PORT="${MYSQL_PORT:-3306}"
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MYSQL_USER="${MYSQL_USER:-root}"
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MYSQL_PASSWORD="${MYSQL_PASSWORD:-}"
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MYSQL_DATABASE="${MYSQL_DATABASE:-wx_service}"
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MYSQL_CONTAINER="${MYSQL_CONTAINER:-}"
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BACKUP_DIR="${BACKUP_DIR:-/var/backups/wx_service}"
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KEEP_DAYS="${KEEP_DAYS:-7}"
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OPS_ALERT_WEBHOOK="${OPS_ALERT_WEBHOOK:-}"
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ALERT_TITLE="${ALERT_TITLE:-[wx_service] 数据备份失败}"
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send_alert() {
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local message="$1"
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if [[ -z "${OPS_ALERT_WEBHOOK}" ]]; then
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echo "ALERT: ${message}" >&2
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return
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fi
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curl -fsS -X POST "${OPS_ALERT_WEBHOOK}" \
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-H "Content-Type: application/json" \
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-d "{\"title\":\"${ALERT_TITLE}\",\"message\":\"${message}\"}" >/dev/null || true
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}
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dump_cmd() {
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if [[ -n "${MYSQL_CONTAINER}" ]]; then
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if [[ -n "${MYSQL_PASSWORD}" ]]; then
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docker exec "${MYSQL_CONTAINER}" mysqldump -h127.0.0.1 -P"${MYSQL_PORT}" -u"${MYSQL_USER}" "-p${MYSQL_PASSWORD}" --single-transaction --quick --set-gtid-purged=OFF "${MYSQL_DATABASE}"
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else
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docker exec "${MYSQL_CONTAINER}" mysqldump -h127.0.0.1 -P"${MYSQL_PORT}" -u"${MYSQL_USER}" --single-transaction --quick --set-gtid-purged=OFF "${MYSQL_DATABASE}"
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fi
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return
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fi
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if [[ -n "${MYSQL_PASSWORD}" ]]; then
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mysqldump -h"${MYSQL_HOST}" -P"${MYSQL_PORT}" -u"${MYSQL_USER}" "-p${MYSQL_PASSWORD}" --single-transaction --quick --set-gtid-purged=OFF "${MYSQL_DATABASE}"
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else
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mysqldump -h"${MYSQL_HOST}" -P"${MYSQL_PORT}" -u"${MYSQL_USER}" --single-transaction --quick --set-gtid-purged=OFF "${MYSQL_DATABASE}"
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fi
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}
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mkdir -p "${BACKUP_DIR}"
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timestamp="$(date +%Y%m%d_%H%M%S)"
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outfile="${BACKUP_DIR}/${MYSQL_DATABASE}_${timestamp}.sql.gz"
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if ! dump_cmd | gzip -9 > "${outfile}"; then
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send_alert "MySQL 备份失败，数据库=${MYSQL_DATABASE}"
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exit 1
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fi
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find "${BACKUP_DIR}" -type f -name "${MYSQL_DATABASE}_*.sql.gz" -mtime +"${KEEP_DAYS}" -delete || true
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echo "backup created: ${outfile}"
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