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使用 /proc/kmsg 时 syslog-ng 启动失败

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使用 /proc/kmsg 时 syslog-ng 启动失败

我最近一直在更新syslog-ng从3.7.3到3.13.2。升级后，守护程序无法启动并出现以下错误消息：

[2017-12-23T20:42:40.635915] Error checking the uniqueness of the persist names, please override it with persist-name option. Shutting down.; persist_name='affile_sd_curpos(/proc/kmsg)', location='/etc/syslog-ng/syslog-ng.conf:24:5'

作为参考，配置的第 24 行。请参阅下面的整个文件。

   file("/proc/kmsg");

我已经调查此错误一段时间了，但该persist-name选项并不能解决问题。预期用途似乎与此问题无关。

我使用的配置文件是hardened gentoo 的默认配置文件。

@version: 3.13
# Copyright 1999-2017 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

# https://bugs.gentoo.org/426814
@include "scl.conf"

#
# Syslog-ng configuration file, compatible with default hardened installations.
#

options {
    threaded(yes);
    chain_hostnames(no);
    stats_freq(43200);
};

source src {
    system();
    internal();
};

source kernsrc {
    file("/proc/kmsg");
};

#source net { udp(); };
#log { source(net); destination(net_logs); };
#destination net_logs { file("/var/log/HOSTS/$HOST/$YEAR$MONTH$DAY.log"); };

destination authlog { file("/var/log/auth.log"); };
destination _syslog { file("/var/log/syslog"); };
destination cron { file("/var/log/cron.log"); };
destination daemon { file("/var/log/daemon.log"); };
destination kern { file("/var/log/kern.log"); };
destination lpr { file("/var/log/lpr.log"); };
destination user { file("/var/log/user.log"); };
destination uucp { file("/var/log/uucp.log"); };
#destination ppp { file("/var/log/ppp.log"); };
destination mail { file("/var/log/mail.log"); };

destination avc { file("/var/log/avc.log"); };
destination audit { file("/var/log/audit.log"); };
destination pax { file("/var/log/pax.log"); };
destination grsec { file("/var/log/grsec.log"); };

destination mailinfo { file("/var/log/mail.info"); };
destination mailwarn { file("/var/log/mail.warn"); };
destination mailerr { file("/var/log/mail.err"); };

destination newscrit { file("/var/log/news/news.crit"); };
destination newserr { file("/var/log/news/news.err"); };
destination newsnotice { file("/var/log/news/news.notice"); };

destination debug { file("/var/log/debug"); };
destination messages { file("/var/log/messages"); };
destination console { usertty("root"); };
destination console_all { file("/dev/tty12"); };
#destination loghost { udp("loghost" port(999)); };

destination xconsole { pipe("/dev/xconsole"); };

filter f_auth { facility(auth); };
filter f_authpriv { facility(auth, authpriv); };
filter f_syslog { not facility(authpriv, mail); };
filter f_cron { facility(cron); };
filter f_daemon { facility(daemon); };
filter f_kern { facility(kern); };
filter f_lpr { facility(lpr); };
filter f_mail { facility(mail); };
filter f_user { facility(user); };
filter f_uucp { facility(uucp); };
#filter f_ppp { facility(ppp); };
filter f_news { facility(news); };
filter f_debug { not facility(auth, authpriv, news, mail); };
filter f_messages { level(info..warn)
    and not facility(auth, authpriv, mail, news); };
filter f_emergency { level(emerg); };

filter f_info { level(info); };

filter f_notice { level(notice); };
filter f_warn { level(warn); };
filter f_crit { level(crit); };
filter f_err { level(err); };

filter f_avc { message(".*avc: .*"); };
filter f_audit { message("^(\\[.*\..*\] |)audit.*") and not message(".*avc: .*"); };
filter f_pax { message("^(\\[.*\..*\] |)PAX:.*"); };
filter f_grsec { message("^(\\[.*\..*\] |)grsec:.*"); };

log { source(src); filter(f_authpriv); destination(authlog); };
log { source(src); filter(f_syslog); destination(_syslog); };
log { source(src); filter(f_cron); destination(cron); };
log { source(src); filter(f_daemon); destination(daemon); };
log { source(kernsrc); filter(f_kern); destination(kern); destination(console_all); };
log { source(src); filter(f_lpr); destination(lpr); };
log { source(src); filter(f_mail); destination(mail); };
log { source(src); filter(f_user); destination(user); };
log { source(src); filter(f_uucp); destination(uucp); };
log { source(kernsrc); filter(f_pax); destination(pax); };
log { source(kernsrc); filter(f_grsec); destination(grsec); };
log { source(kernsrc); filter(f_audit); destination(audit); };
log { source(kernsrc); filter(f_avc); destination(avc); };
log { source(src); filter(f_mail); filter(f_info); destination(mailinfo); };
log { source(src); filter(f_mail); filter(f_warn); destination(mailwarn); };
log { source(src); filter(f_mail); filter(f_err); destination(mailerr); };
log { source(src); filter(f_news); filter(f_crit); destination(newscrit); };
log { source(src); filter(f_news); filter(f_err); destination(newserr); };
log { source(src); filter(f_news); filter(f_notice); destination(newsnotice); };
log { source(src); filter(f_debug); destination(debug); };
log { source(src); filter(f_messages); destination(messages); };
log { source(src); filter(f_emergency); destination(console); };
#log { source(src); filter(f_ppp); destination(ppp); };
log { source(src); destination(console_all); };

答案1

该问题不是由 apparmor 配置文件造成的，syslog-ng而是由 apparmor 配置文件造成的。该配置文件阻止读取/dev/kmsg，即使在使用时也需要读取/proc/kmsg（已列入白名单）。

要查看完整的解释和错误报告，请检查我在有关此错误的更具体问题下写的答案这里。

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