小弟问下 systemd 日志的问题 - V2EX
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mingtdlb
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小弟问下 systemd 日志的问题

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  •   mingtdlb 2024-08-25 13:56:17 +08:00 2652 次点击
    这是一个创建于 413 天前的主题,其中的信息可能已经有所发展或是发生改变。

    systemd 日志总是被轮转,有什么办法可以解决吗?

    [root@localhost ~]# grep -v ^# /etc/systemd/journald.conf [Journal] [root@localhost ~]# [root@localhost ~]# journalctl --disk-usage Archived and active journals take up 184.0M on disk. [root@localhost ~]# [root@localhost ~]# systemctl status systemd-journald.service ● systemd-journald.service - Journal Service Loaded: loaded (/usr/lib/systemd/system/systemd-journald.service; static; vendor preset: disabled) Active: active (running) since Fri 2024-08-23 22:28:55 CST; 1 day 15h ago Docs: man:systemd-journald.service(8) man:journald.conf(5) Main PID: 610 (systemd-journal) Status: "Processing requests..." CGroup: /system.slice/systemd-journald.service └─610 /usr/lib/systemd/systemd-journald Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable. [root@localhost ~]# 

    出现这个

    Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable. 

    网上搜了一下,redhat 说不用管它,但日志被轮转了会导致 journalctl 看不了系统日志。

    8 条回复    2024-08-26 17:21:14 +08:00
    billlee
        2
    billlee  
       2024-08-25 15:11:54 +08:00
    RHEL 还在用 rsyslogd 吗?我记得以前在 RHEL 上 systemd-journald 纯粹就起到吧日志转发个 rsyslogd 的作用,所以默认的配置是 journald 日志不写磁盘,只在 tmpfs 上缓冲一小段
    mingtdlb
        3
    mingtdlb  
    OP
       2024-08-25 16:45:31 +08:00
    @billlee 两个东西
    ranaanna
        4
    ranaanna  
       2024-08-25 19:01:15 +08:00   3
    1. 首先,日志被轮转并不影响查看。journalctl 会自动读取和组合日志目录中的所有文件,包括轮转产生的 archived 日志

    2. 日志一般默认存储在内存中(/run/log/journal ),系统重启日志丢失因此会提示日志输出不完整或 unavailable 。修改/etc/systemd/journald.conf 文件 Storage=persistent ,或其他让日志保存在/var/log/journal

    3. 只是一个 warning 而已,确实不用管它
    shum02
        5
    shum02  
       2024-08-25 20:17:59 +08:00
    楼上说得对
    skyrim61
        6
    skyrim61  
       2024-08-26 09:02:22 +08:00
    @ho121 这个是什么网站, 感觉很专业.
    yanqiyu
        7
    yanqiyu  
       2024-08-26 10:04:20 +08:00
    @skyrim61 这是 systemd 自己的 manpage
    mingtdlb
        8
    mingtdlb  
    OP
       2024-08-26 17:21:14 +08:00
    @ranaanna 当出现 `Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.` 的时候,服务是打标准输出的日志,都会没有记录。正常轮转是不会影响查看的。

    正常这个位置是有日志的
    ![img]( )
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