很高兴见到你。
突然/var/log/messages、cron、secure等都没有输出了...我没有重启rsyslog，也没有修改/etc/rsyslog.conf，所以不知道为什么。重启后还是没有输出。也有服务器正常输出的。
如果你看一下/proc/*/fd，正确输出的是
l-wx------ 1 root root 64 Apr 16 2021 8 -> /var/log/secure
l-wx------ 1 root root 64 Apr 16 2021 7 -> /var/log/maillog
l-wx------ 1 root root 64 Apr 16 2021 6 -> /var/log/cron
lrwx------ 1 root root 64 Apr 16 2021 5 -> socket:[8296]
lrwx------ 1 root root 64 Apr 16 2021 4 -> socket:[8295]
lr-x------ 1 root root 64 Apr 16 2021 3 -> /proc/kmsg
l-wx------ 1 root root 64 Apr 16 2021 2 -> /var/log/messages
lrwx------ 1 root root 64 Apr 16 2021 1 -> [eventpoll]
lrwx------ 1 root root 64 Apr 16 2021 0 -> socket:[8297]
未输出的是
lr-x------ 1 root root 64 May 2 05:24 3 -> /proc/kmsg
lrwx------ 1 root root 64 May 2 05:24 1 -> socket:[122587394]
lrwx------ 1 root root 64 May 2 05:24 0 -> socket:[122587391]
两个服务器的 rsyslog.conf 相同。
# rsyslog v5 configuration file
# For more information see /usr/share/doc/rsyslog-*/rsyslog_conf.html
# If you experience problems, see http://www.rsyslog.com/doc/troubleshoot.html
#### MODULES ####
$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imklog # provides kernel logging support (previously done by rklogd)
#$ModLoad immark # provides --MARK-- message capability
# Provides UDP syslog reception
#$ModLoad imudp
#$UDPServerRun 514
# Provides TCP syslog reception
#$ModLoad imtcp
#$InputTCPServerRun 514
#### GLOBAL DIRECTIVES ####
# Use default timestamp format
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
# File syncing capability is disabled by default. This feature is usually not required,
# not useful and an extreme performance hit
#$ActionFileEnableSync on
# Include all config files in /etc/rsyslog.d/
$IncludeConfig /etc/rsyslog.d/*.conf
#### RULES ####
# Log all kernel messages to the console.
# Logging much else clutters up the screen.
#kern.* /dev/console
# Log anything (except mail) of level info or higher.
# Don't log private authentication messages!
*.info;mail.none;authpriv.none;cron.none /var/log/messages
# The authpriv file has restricted access.
authpriv.* /var/log/secure
# Log all the mail messages in one place.
mail.* -/var/log/maillog
# Log cron stuff
cron.* /var/log/cron
# Everybody gets emergency messages
*.emerg *
# Save news errors of level crit and higher in a special file.
uucp,news.crit /var/log/spooler
# Save boot messages also to boot.log
local7.* /var/log/boot.log
# ### begin forwarding rule ###
# The statement between the begin ... end define a SINGLE forwarding
# rule. They belong together, do NOT split them. If you create multiple
# forwarding rules, duplicate the whole block!
# Remote Logging (we use TCP for reliable delivery)
#
# An on-disk queue is created for this action. If the remote host is
# down, messages are spooled to disk and sent when it is up again.
#$WorkDirectory /var/lib/rsyslog # where to place spool files
#$ActionQueueFileName fwdRule1 # unique name prefix for spool files
#$ActionQueueMaxDiskSpace 1g # 1gb space limit (use as much as possible)
#$ActionQueueSaveOnShutdown on # save messages to disk on shutdown
#$ActionQueueType LinkedList # run asynchronously
#$ActionResumeRetryCount -1 # infinite retries if host is down
# remote host is: name/ip:port, e.g. 192.168.0.1:514, port optional
#*.* @@remote-host:514
我们不清楚为什么输出突然停止。
操作系统：CentOS6 rsyslog：5.8.10