#!/usr/bin/env bash # --------------------------------------------------------- # Enable persistent systemd-journald logs with disk limits # Tested on: AlmaLinux 9 / CentOS Stream 9 # Author: 四点 # --------------------------------------------------------- set -euo pipefailecho "[1/4] Create persistent directory..." install -d -m 2755 -o root -g systemd-journal /var/log/journal systemd-tmpfiles --create --prefix /var/log/journal || trueecho "[2/4] Write journald limit configuration..." mkdir -p /etc/systemd/journald.conf.d cat >/etc/systemd/journald.conf.d/99-limits.conf <<'EOF' [Journal] # 存储方式：持久化到 /var/log/journal Storage=persistent# 日志总占用上限（所有 .journal 文件总和） SystemMaxUse=6G# 单个日志文件上限 SystemMaxFileSize=200M# 日志最长保留时间 MaxRetentionSec=90day# 节流：30 秒内最多收 2000 条，防止日志风暴刷爆磁盘 RateLimitIntervalSec=30s RateLimitBurst=2000 EOFecho "[3/4] Restart systemd-journald..." systemctl restart systemd-journaldecho "[4/4] Check results..." journalctl --disk-usage systemctl status systemd-journald --no-pager -l | head -n 10 ls -ld /var/log/journal
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保存为 enable-journald-persistent.sh：