Ubuntu 14.04 - logrotate 不旋转 /var/log/*（rsyslog 配置）

Question

我有一堆我管理的 Ubuntu 14.04 服务器，其中 logrotate 没有在/var/log/*. 我将假设它存在问题，/etc/logrotate.d/rsyslog因为我看到/etc/logrotate.d/正确旋转日志中的其他条目。

这些服务器是使用 CHEF 部署的。但是，我在食谱等中没有看到任何引用 logrotate 的功能更改的内容。添加了一些脚本/etc/logrotate.d，这些脚本每天都按预期运行。一个脚本是否有可能/etc/logrotate.d影响另一个脚本（我不这么认为）？在 Ubuntu 12.04 机器上配置了使用相同 CHEF 配方的类似服务器没有日志在/var/log/*.

运行/usr/sbin/logrotate -d /etc/logrotate.conf，我得到以下信息（省略与 rsyslog 无关的任何内容）：

rotating pattern: /var/log/syslog
 after 1 days (7 rotations)
empty log files are not rotated, old logs are removed
switching euid to 0 and egid to 104
considering log /var/log/syslog
  log does not need rotating
switching euid to 0 and egid to 0

rotating pattern: /var/log/mail.info
/var/log/mail.warn
/var/log/mail.err
/var/log/mail.log
/var/log/daemon.log
/var/log/kern.log
/var/log/auth.log
/var/log/user.log
/var/log/lpr.log
/var/log/cron.log
/var/log/debug
/var/log/messages
 weekly (4 rotations)
empty log files are not rotated, old logs are removed
switching euid to 0 and egid to 104
considering log /var/log/mail.info
  log does not need rotating
considering log /var/log/mail.warn
  log /var/log/mail.warn does not exist -- skipping
considering log /var/log/mail.err
  log /var/log/mail.err does not exist -- skipping
considering log /var/log/mail.log
  log does not need rotating
considering log /var/log/daemon.log
  log does not need rotating
considering log /var/log/kern.log
  log does not need rotating
considering log /var/log/auth.log
  log does not need rotating
considering log /var/log/user.log
  log does not need rotating
considering log /var/log/lpr.log
  log /var/log/lpr.log does not exist -- skipping
considering log /var/log/cron.log
  log /var/log/cron.log does not exist -- skipping
considering log /var/log/debug
  log does not need rotating
considering log /var/log/messages
  log does not need rotating
not running postrotate script, since no logs were rotated
switching euid to 0 and egid to 0

当我查看 /var/log 时，我可以看到没有任何内容被旋转：

$ ls -l /var/log
total 34116
-rw-r--r-- 1 root      root    19512 Jan  9 07:15 alternatives.log
drwxr-xr-x 2 root      root     4096 Jan  7 20:28 apt
-rw-r----- 1 syslog    adm   3725622 Jan 12 19:50 auth.log
-rw-r--r-- 1 root      root     2481 Jan 10 03:46 boot.log
-rw-rw---- 1 root      utmp        0 Apr 11  2013 btmp
-rw-r--r-- 1 syslog    adm      6170 Jan  7 20:11 cloud-init.log
drwxr-xr-x 2 root      root     4096 Nov 18  2011 cron-apt
-rw-r----- 1 root      adm     19724 Jan 12 19:21 daemon.log
-rw-r----- 1 root      adm      5944 Jan 10 03:46 debug
drwxr-xr-x 2 root      root     4096 Oct 10  2012 dist-upgrade
-rw-r--r-- 1 root      adm     15312 Jan 10 03:46 dmesg
-rw-r--r-- 1 root      adm     15312 Jan  8 04:18 dmesg.0
-rw-r--r-- 1 root      adm      5451 Jan  7 20:11 dmesg.1.gz
-rw-r--r-- 1 root      root       28 Jan  7 20:11 dmesg.2.gz
-rw-r--r-- 1 root      root   162648 Jan 12 07:10 dpkg.log
drwxr-xr-x 2 root      root     4096 Apr 11  2013 fsck
-rw-r----- 1 syslog    adm     81900 Jan 10 03:46 kern.log
drwxr-xr-x 2 landscape root     4096 Jan  7 20:11 landscape
-rw-rw-r-- 1 root      utmp   292584 Jan 12 19:20 lastlog
drwxr-xr-x 2 root      root     4096 Jan  7 20:43 logstash
-rw-r----- 1 syslog    adm         0 Jan  7 20:11 mail.err
-rw-r----- 1 root      adm   9433681 Jan 12 19:50 mail.info
-rw-r----- 1 syslog    adm   9433797 Jan 12 19:50 mail.log
-rw-r----- 1 root      adm         0 Jan  7 20:43 mail.warn
-rw-r----- 1 root      adm     92617 Jan 12 07:10 messages
-rw-r----- 1 root      adm       519 Jan  7 20:43 monit.log
drwxr-s--- 2 mysql     adm      4096 Jan  7 20:45 mysql
-rw-r----- 1 mysql     adm         0 Jan  7 20:45 mysql.err
-rw-r----- 1 mysql     adm         0 Jan  7 20:45 mysql.log
drwxr-xr-x 2 root      root     4096 Jan  7 20:11 news
drwxr-xr-x 2 www-data  root     4096 Jan  7 20:41 nginx
-rw-r----- 1 syslog    adm  11460381 Jan 12 19:50 syslog
drwxr-xr-x 3 root      root     4096 Jan 12 19:45 sysstat
-rw-r--r-- 1 root      root    84672 Jan 10 03:46 udev
-rw-r----- 1 syslog    adm         0 Jan  7 20:11 ufw.log
drwxr-xr-x 2 root      root     4096 Jan  8 04:20 upstart
-rw-r----- 1 root      adm     41714 Jan 12 07:10 user.log
-rw-rw-r-- 1 root      utmp   206208 Jan 12 19:20 wtmp

这是我的 logrotate 版本（Stock Ubuntu 14.04）：

$logrotate
logrotate 3.7.8 - Copyright (C) 1995-2001 Red Hat, Inc.
This may be freely redistributed under the terms of the GNU Public License

Usage: logrotate [-dfv?] [-d|--debug] [-f|--force] [-m|--mail=command] [-s|--state=statefile] [-v|--verbose] [-?|--help]
        [--usage] [OPTION...] <configfile>

Logrotate 在 cron.daily（默认配置）中：

$ ls /etc/cron.daily/logrotate
/etc/cron.daily/logrotate

默认的 crontab 配置从未改变：

$ cat /etc/crontab
# /etc/crontab: system-wide crontab
# Unlike any other crontab you don't have to run the `crontab'
# command to install the new version when you edit this file
# and files in /etc/cron.d. These files also have username fields,
# that none of the other crontabs do.

SHELL=/bin/sh
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin

# m h dom mon dow user  command
17 *    * * *   root    cd / && run-parts --report /etc/cron.hourly
25 6    * * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.daily )
47 6    * * 7   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.weekly )
52 6    1 * *   root    test -x /usr/sbin/anacron || ( cd / && run-parts --report /etc/cron.monthly )

/etc/logrotate.conf 文件：

$ cat /etc/logrotate.conf
# see "man logrotate" for details
# rotate log files weekly
weekly

# use the syslog group by default, since this is the owning group
# of /var/log/syslog.
su root syslog

# keep 4 weeks worth of backlogs
rotate 4

# create new (empty) log files after rotating old ones
create

# uncomment this if you want your log files compressed
#compress

# packages drop log rotation information into this directory
include /etc/logrotate.d

# no packages own wtmp, or btmp -- we'll rotate them here
/var/log/wtmp {
    missingok
    monthly
    create 0664 root utmp
    rotate 1
}

/var/log/btmp {
    missingok
    monthly
    create 0660 root utmp
    rotate 1
}

# system-specific logs may be configured here

/etc/logrotate.d/rsyslog 文件：

$ cat rsyslog
/var/log/syslog
{
    rotate 7
    daily
    missingok
    notifempty
    delaycompress
    compress
    postrotate
        reload rsyslog >/dev/null 2>&1 || true
    endscript
}

/var/log/mail.info
/var/log/mail.warn
/var/log/mail.err
/var/log/mail.log
/var/log/daemon.log
/var/log/kern.log
/var/log/auth.log
/var/log/user.log
/var/log/lpr.log
/var/log/cron.log
/var/log/debug
/var/log/messages
{
    rotate 4
    weekly
    missingok
    notifempty
    compress
    delaycompress
    sharedscripts
    postrotate
        reload rsyslog >/dev/null 2>&1 || true
    endscript
}

Answer 1

在 Ubuntu 14.04 服务器上发生并解决了相同的问题，在 /etc/logrotate.d/rsyslog 中进行了以下更改

从：

/var/log/syslog
{
    rotate 7
    daily
    ...
    postrotate
        reload rsyslog >/dev/null 2>&1 || true
    endscript
}

对此：

{
    rotate 7
    daily
    ...
    postrotate
        service rsyslog rotate >/dev/null 2>&1 || true
    endscript
}

对于每个轮换的 rsyslog 文件。我用“/usr/sbin/logrotate /etc/logrotate.conf”手动触发了logrotate，并用记录器对其进行了测试。