Rsyslog 收集 Redis 及第三方日志简单记录

背景

​ 现在服务器数量较多，经常需要做日志收集。耳熟能详的方案是 ELK 和后起之秀 Loki，但是有的时候项目组的资源有限，用这些方案稍显笨重，所以这时候需要操作系统自带的 Rsyslog 了。

简单记录

Rsyslog 通常操作系统自带，分为服务端和客户端，如何区分，主要是看配置。下面演示一下如何通过 Rsyslog 收集 Redis 的日志。

服务端

[root@l-rsj-wjfwq ~]# egrep -v '#|^$' /etc/rsyslog.conf
$ModLoad imudp	##开启udp的514端口
$UDPServerRun 514
$WorkDirectory /var/lib/rsyslog
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
$template Remote,"/data/logbackup/%fromhost-ip%/%fromhost-ip%_%$YEAR%-%$MONTH%-%$DAY%.log" ##定义模板，接受日志文件路径，区分了不同主机的日志
:fromhost-ip, !isequal, "127.0.0.1" ?Remote   # # 过滤server 本机的日志 
& ~
$IncludeConfig /etc/rsyslog.d/*.conf
$OmitLocalLogging on
$IMJournalStateFile imjournal.state
*.info;mail.none;authpriv.none;cron.none                /var/log/messages
authpriv.*                                              /var/log/secure
mail.*                                                  -/var/log/maillog
cron.*                                                  /var/log/cron
*.emerg                                                 :omusrmsg:*
uucp,news.crit                                          /var/log/spooler
local7.*                                                /var/log/boot.log

客户端

Redis 的日志路径是 /data/redis/6379.log。收集这种第三方的日志时需要使用 imfile 模块。

[root@l-rsj-zjjfwq2 ~]# cat /etc/rsyslog.conf
# rsyslog 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 ####

# The imjournal module bellow is now used as a message source instead of imuxsock.
$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imjournal # provides access to the systemd journal
#$ModLoad imklog # reads kernel messages (the same are read from journald)
#$ModLoad immark  # provides --MARK-- message capability

# Provides UDP syslog reception
#$ModLoad imudp
#$UDPServerRun 514

# Provides TCP syslog reception
#$ModLoad imtcp
#$InputTCPServerRun 514
# 重点在这里，启用模块及指定日志路径
$ModLoad imfile
$InputFileName /data/redis/6379.log
$InputFileTag nova-info:
$InputFileStateFile stat-nove-info
$InputRunFileMonitor

#### GLOBAL DIRECTIVES ####

# Where to place auxiliary files
$WorkDirectory /var/lib/rsyslog

# 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

# Turn off message reception via local log socket;
# local messages are retrieved through imjournal now.
$OmitLocalLogging on

# File to store the position in the journal
$IMJournalStateFile imjournal.state


#### 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                                                 :omusrmsg:*

# 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.
$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
# 这里是 Rsyslog 服务端的日志
*.* @172.19.17.2:514
# ### end of the forwarding rule ###

测试

模拟在日志文件里写入一行文字。然后去 Rsyslog 服务端指定的路径去查看是否出现了该文件夹和文件内容。

这里可以看到收集完成

原文地址：http://www.cnblogs.com/fsckzy/p/16831169.html