关于rsyslog和loganalyzer使用

系统日志太多太分散的话就需要整合,并且分析,所以就有了这样一套东西,这样就大大的减轻了系统管理员的压力,不过现在这篇只是小试牛刀,很多应用功能还是没有用到,例如自定义日志收集过滤, 日志分析图表,等等,不过原理大致都基本如下,是可以举一反三的。

关于rsyslog和loganalyzer的配置简略架构流程图

一、rsyslog

【客户端】rsyslog配置

1.安装rsyslog

yum -y install rsyslog

2.配置rsyslog

/etc/rsyslog.conf

配置很多,但是只需要注意几个

# 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  --注意这个
$UDPServerRun 514   --注意这个

# 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
*.*                                                      @主rsyslog服务器ip或者host   --注意这个

# 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
# ### end of the forwarding rule ###

1.$ModLoad imudp和$UDPServerRun 514 开启rsyslog的日志远程传输,使用udp模式,当然也可以使用tcp模式,而且tcp也比udp更可靠,防止日志在传输过程丢失,只是需要建立稳定连接,消耗资源,各有所长,各有所需。

2.#.info;mail.none;authpriv.none;cron.none /var/log/messages 注释掉这个语句,改为.* @主rsyslog服务器ip或者host,这是为了配置rsyslog日志传输的目标,另外rsyslog的格式是分为2个方面的,一个是facitlity一个是priority,这个需要一点篇幅来说明,详细可以参阅科普时间或者官网,目前现在这个配置的意思是将所有级别的日志都传输到某个服务器。

3.客户端的rsyslog只需要配置这样就足够了。需要注意的是,如果开启了防火墙的话,那么记得514端口是rsyslog的传输端口,也要放开访问。

3.重启rsyslog服务

service rsyslog restart

【服务端】rsyslog配置

1.安装rsyslog

yum -y install rsyslog

2.配置rsyslog存储数据库(数据库的安装在下面那里一起写了)

yum -y install rsyslog-mysql 

导入创库sql

cd /usr/share/doc/rsyslog-mysql-5.8.10/
[root@localhost rsyslog-mysql-5.8.10]# ls
createDB.sql
[root@localhost rsyslog-mysql-5.8.10]# mysql -u root -p < createDB.sql 

这个sql会自动帮你创建rsyslog存储在mysql中的数据的表,等下可以直接被loganalyzer读取数据,然后使用。

连接数据库检查

mysql -u root -p
Enter password: 
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 7
Server version: 5.1.73 Source distribution

Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.

Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| Syslog             |
| mysql              |
| test               |
+--------------------+
4 rows in set (0.00 sec)


mysql> use Syslog
Reading table information for completion of table and column names
You can turn off this feature to get a quicker startup with -A

Database changed
mysql> show tables;
+------------------------+
| Tables_in_Syslog       |
+------------------------+
| SystemEvents           |
| SystemEventsProperties |
+------------------------+
2 rows in set (0.00 sec)

配置rsyslog连接mysql账号和密码和授权

mysql> grant all on Syslog.* to 'rsysloga'@'localhost' identified by 'rsyslogp';  #设置用户访问数据库服务器中Syslog数据库的用户名和密码,因为rsyslog服务端和mysql数据库是在同一台机器上,所以只允许本机访问就可以了
Query OK, 0 rows affected (0.00 sec)

flush privileges;  #刷新权限,及时生效

3.配置服务端的rsyslog.conf(数据库的安装在下面那里一起写了)

cat /etc/rsyslog.conf 
# 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
$ModLoad ommysql    --注意这个

# Provides UDP syslog reception
$ModLoad imudp      --注意这个
$UDPServerRun 514   --注意这个

# 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      
*.*                                                     :ommysql:127.0.0.1,Syslog,rsysaloga,rsyslogp        --注意这个 

# 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
# ### end of the forwarding rule ###

1.增加了$ModLoad ommysql这个模块,这个就是rsyslog连接mysql使用的模块

2.. :ommysql:127.0.0.1,Syslog,rsysaloga,rsyslogp 这里意思是说使用某个可以连接mysql的账号和密码,连接mysql,将数据传输到mysql数据库里面去。

3.udp传输配置依然要开启,那是因为rsyslog客户端会将日志以udp的方式传输到rsyslog服务端,所以双方都要开启同样的传输方式才可以完成传输。

4.需要注意的是,如果开启了防火墙的话,那么记得514端口是rsyslog的传输端口,也要放开访问。

4.重启rsyslog服务

service rsyslog restart

至此,rsyslog部分已经完成配置,若要检查是否配置成功,可以检查数据库里是否有数据即可。

mysql> select * from SystemEvents;

二、loganalyzer

可以理解为loganalyzer其实就是一个web平台来展现日志数据的而已。

1.下载并安装http+php+mysql套件

yum -y install httpd php php-mysql php-gd mysql mysql-server

httpd用来提供web服务
php使apache支持php,因为loganalyzer是用php编写
php-mysql用于loganalyzer连接数据库
php-gd用于绘图
mysql 是loganalyzer存储数据的地方

设置MySQL的root用户设置密码,因为MySQL被安装时,它的root用户时没有设置密码的,所以可以直接连或者设置一个,但是不影响我们这次配置任务。mysql需要启动,这个需要注意。

2.配置apache+php,并启动apache和mysql

因为yum安装的关系,所有一切都已经配置好了

如:grep -E 'Document|Listen' /etc/httpd/conf/httpd.conf |grep -v '^#'  
Listen 80
DocumentRoot "/var/www/html"

如:grep -v '^#' /etc/httpd/conf.d/php.conf 

  LoadModule php5_module modules/libphp5.so


  LoadModule php5_module modules/libphp5-zts.so


AddHandler php5-script .php
AddType text/html .php

DirectoryIndex index.php    

启动httpd

service httpd start

启动mysql

service mysqld start

3.下载loganalyzer

下载地址:http://download.adiscon.com/loganalyzer/loganalyzer-3.6.6.tar.gz

将其放置到配置好的apache的web目录里面/var/www/html

tar -zxpf loganalyzer-3.6.6.tar.gz -C /var/www/html 

cd /var/www/html/
[root@localhost html]# ls
loganalyzer-3.6.6

授权目录

chown -R apache.apache /var/www/html/loganalyzer-3.6.6/

4.配置loganalyzer

创建loganalyzer数据库和访问账号密码和授权

mysql> create database loganalyzer;
Query OK, 1 row affected (0.04 sec)
mysql> grant all on loganalyzer.* to loga@'localhost' identified by 'logp';
Query OK, 0 rows affected (0.00 sec)
mysql> flush privileges;
Query OK, 0 rows affected (0.00 sec)

生成config.php

cd /var/www/html/loganalyzer-3.6.6/contrib

chmod +x *

./configure.sh 

在当前目录会生成config.php文件,然后将其放置到src目录去

cp config.php /var/www/html/loganalyzer-3.6.6/src/

在浏览器访问这台主机的80端口

http://服务端的ip/loganalyzer-3.6.6/src/install.php

备注:

1.step 2 会检查config.php的写入权限,如果没有请授权一下, chmod +w config.php
2.step 3 选择enable user database,使用自定义数据库,然后填写数据库访问信息,这里的数据库是指loganalyzer的用户数据库,而不是rsyslog日志存储的数据库,这里是需要注意的。并且选取require user to be login。
3.step 5 会将loganalyzer的相关用户表写入到数据库,可以检查loganalyzer的数据库就可以看到了。
4.step 6 配置loganalyzer的管理员账号,登录loganalyzer界面使用的。
5.step 7 是配置rsyslog的日志存储数据库的访问方法,在source type选择 mysql native,然后填写mysql的访问信息,记住,这里是rsyslog的日志存储数据库,不是loganalyzer的用户数据库。
6.完成后会自动跳转提示登录,登陆后就可以看到数据了。

三、科普时间

1.关于rsyslog的日志规则facitlity和priority

###rsyslog.conf中日志规则的定义的格式
facitlity.priority          Target
#facility: 日志设备(可以理解为日志类型):
==============================================================
auth         #pam产生的日志,认证日志
authpriv     #ssh,ftp等登录信息的验证信息,认证授权认证
cron         #时间任务相关
kern         #内核
lpr          #打印
mail         #邮件
mark(syslog) #rsyslog服务内部的信息,时间标识
news         #新闻组
user         #用户程序产生的相关信息
uucp         #unix to unix copy, unix主机之间相关的通讯
local 1~7    #自定义的日志设备
===============================================================
#priority: 级别日志级别:
=====================================================================
debug           #有调式信息的,日志信息最多
info            #一般信息的日志,最常用
notice          #最具有重要性的普通条件的信息
warning, warn   #警告级别
err, error      #错误级别,阻止某个功能或者模块不能正常工作的信息
crit            #严重级别,阻止整个系统或者整个软件不能正常工作的信息
alert           #需要立刻修改的信息
emerg, panic    #内核崩溃等严重信息
###从上到下,级别从低到高,记录的信息越来越少,如果设置的日志内性为err,则日志不会记录比err级别低的日志,只会记录比err更高级别的日志,也包括err本身的日志。
=====================================================================
Target:
  #文件, 如/var/log/messages
  #用户, root,*(表示所有用户)
  #日志服务器,@172.16.22.1
  #管道        | COMMAND

2.如果日志数量太大,内容太多,可以进行过滤记录日志

简单的方法可以在rsyslog客户端上的配置

:msg, !contains, "informational"  
*.*                 @主rsyslog服务器ip或者host

在传输配置的上一行增加一个过滤配置,格式是严格的,一定要在上一行增加过滤配置,这里的意思是日志内容出现informational的就不记录。详细的过滤方式在官网上有说,需要的话就要慢慢按照他的方式来使用。


参考文档:

1.http://litaotao.blog.51cto.com/6224470/1283871

2.http://ftp.ics.uci.edu/pub/centos0/ics-custom-build/BUILD/rsyslog-3.19...

3.http://www.cnblogs.com/tobeseeker/archive/2013/03/10/2953250.html


原文链接:
http://www.godblessyuan.com/2015/05/02/rsyslog_loganalyzer_setting/

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