Initial commit: knowledge base

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2026-08-05 17:12:58 +08:00
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# 服务器加固(2026-08-05
## 1. Swap 交换空间
**原因:** 2G 内存没有 Swap,内存爆了直接 OOM 杀进程。
```bash
fallocate -l 2G /swapfile
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo '/swapfile none swap sw 0 0' >> /etc/fstab
```
**验证:** `swapon --show``/swapfile file 2G`
## 2. 停止 SearXNG
**原因:** 不用搜索功能,容器每分钟重启一次浪费 CPU。
```bash
cd /lobehub
docker compose stop searxng
docker compose rm -f searxng
```
> 注意:不要运行 `docker compose up -d`(会重建 SearXNG),单服务用 `docker compose up -d lobe`
## 3. 开机自启
创建 `/etc/systemd/system/lobehub.service`
```ini
[Unit]
Description=LobeHub Docker Stack
Requires=docker.service
After=docker.service
[Service]
Type=oneshot
RemainAfterExit=yes
WorkingDirectory=/lobehub
ExecStart=/usr/bin/docker compose up -d lobe postgresql redis rustfs
ExecStop=/usr/bin/docker compose stop
[Install]
WantedBy=multi-user.target
```
```bash
systemctl daemon-reload
systemctl enable lobehub docker nginx
```
## 4. 每日自动备份
脚本位置:`/lobehub/backup.sh`
```bash
#!/bin/bash
DB_PASS=$(grep POSTGRES_PASSWORD /lobehub/.env | cut -d= -f2)
DATE=$(date +%Y%m%d_%H%M%S)
FILE=/lobehub/backups/lobehub_$DATE.sql.gz
docker compose -f /lobehub/docker-compose.yml exec -T postgresql pg_dump -U postgres lobechat | gzip > $FILE
find /lobehub/backups -name '*.sql.gz' -mtime +7 -delete
echo "Backup: $FILE ($(du -h $FILE | cut -f1))"
```
Cron 任务(每天凌晨 3 点):
```
0 3 * * * /lobehub/backup.sh >> /lobehub/backups/backup.log 2>&1
```
备份目录:`/lobehub/backups/`,保留最近 7 天。
## 最终状态
| 项目 | 值 |
|------|-----|
| 内存 | 1.0G/1.8G + 2.0G Swap |
| 磁盘 | 9.2G/40G (25%) |
| 容器数 | 4lobehub, postgres, redis, rustfs |
| SearXNG | 已停止删除 |
| 自启 | Docker + Nginx + LobeHub 全部 enabled |
| 备份 | 每日凌晨 3 点,保留 7 天 |