Linux下使用Rsyslog搭建集中日志服务器(3)

1，Facility是syslog的模块: rsyslog通过facility概念来定义日志消息的来源，以方便对日志进行分类。Facility:有0-23种设备可选，在python的syslog库中有一部分缺失
0 kernel messages
1 user-level messages
2 mail system
3 system daemons
4 security/authorization messages
5 messages generated internally by syslogd
6 line printer subsystem
7 network news subsystem
8 UUCP subsystem
9 clock daemon
10 security/authorization messages
11 FTP daemon
12 NTP subsystem
13 log audit
14 log alert
15 clock daemon
16-23 　　　　local0 - local7

常用的有：

2，Severity:日志等级
0 Emergency
1 Alert
2 Critical
3 Error
4 Warning
5 Notice
6 Informational
7 Debug

重要的配置文件：

1，rsyslog server服务端的配置：

[root@zabbix 2018-05-23]# grep -v "^$" /etc/rsyslog.conf | grep -v "^#"
$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imjournal # provides access to the systemd journal
$ModLoad imudp
$UDPServerRun 514
$template RemoteHost,"/data/%$YEAR%-%$MONTH%-%$DAY%/%FROMHOST-IP%.log"
*.*  ?RemoteHost
& ~
$ModLoad imtcp
$InputTCPServerRun 514
$WorkDirectory /var/lib/rsyslog
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
$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
local0.*                                                /etc/keepalived/keepalived.log

2，rsyslog 客户端的配置

[root@server98 log]# grep -v "^$" /etc/rsyslog.conf | grep -v "^#"
$ModLoad imuxsock # provides support for local system logging (e.g. via logger command)
$ModLoad imjournal # provides access to the systemd journal
$WorkDirectory /var/lib/rsyslog
$ActionFileDefaultTemplate RSYSLOG_TraditionalFileFormat
$template myFormat,"%timestamp% %fromhost-ip% %msg%\n"
$IncludeConfig /etc/rsyslog.d/*.conf
$OmitLocalLogging on
$IMJournalStateFile imjournal.state
*.info;mail.none;authpriv.none;cron.none          @192.168.99.99:514
*.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
local0.*                                            /etc/keepalived/keepalived.log