如何使用syslog-ng搭建日志服務器

這篇文章給大家分享的是有關如何使用syslog-ng搭建日志服務器的內容。小編覺得挺實用的，因此分享給大家做個參考，一起跟隨小編過來看看吧。

環境介紹
日志服務器IP：192.168.90.20；客戶端IP：192.168.90.10
系統：RHEL5.4
實現目標：將客戶端的日志自動保存在服務器端的相應目錄，并根據日期，IP地址和日志類型進行分開保存
備注：由于在虛擬機環境下操作，服務器于客戶端時間未同步，所以會存在記錄日志時間不一致的現象；
[root@server2 ~]# cd /usr/local/src/tarbag/
[root@server2 tarbag]# wget http://www.balabit.com/downloads/files/eventlog/0.2/eventlog_0.2.9.tar.gz
[root@server2 tarbag]# tar -zxvf eventlog_0.2.9.tar.gz -C ../software/
[root@server2 tarbag]# cd ../software/eventlog-0.2.9/
[root@server2 eventlog-0.2.9]# ./configure --prefix=/usr/local/eventlog && make && make install
[root@server2 eventlog-0.2.9]# ls /usr/local/eventlog/
include lib
[root@server2 syslog-ng-3.0.5]# cd -
/usr/local/src/tarbag
[root@server2 tarbag]# wget http://www.balabit.com/downloads/files/libol/0.3/libol-0.3.9.tar.gz
[root@server2 tarbag]# tar -zxvf libol-0.3.9.tar.gz -C ../software/
[root@server2 tarbag]# cd ../software/libol-0.3.9/
[root@server2 libol-0.3.9]# ./configure --prefix=/usr/local/libol && make && make install
[root@server2 libol-0.3.9]# ls /usr/local/libol/
bin include lib
[root@server2 tarbag]# wget http://www.balabit.com/downloads/files/syslog-ng/sources/3.0.5/source/syslog-ng_3.0.5.tar.gz
[root@server2 tarbag]# tar -zxvf syslog-ng_3.0.5.tar.gz -C ../software/
[root@server2 tarbag]# cd ../software/syslog-ng-3.0.5/
[root@server2 syslog-ng-3.0.5]# export PKG_CONFIG_PATH=/usr/local/eventlog/lib/pkgconfig
[root@server2 syslog-ng-3.0.5]# ./configure --prefix=/usr/local/syslog-ng --with-libol=/usr/local/libol && make && make install
configure: error: Cannot find eventlog version >= 0.2: is pkg-config in path? (若出現這個錯誤，基本上是由于前面的PKG_CONFIG_PATH變量沒指定好)
[root@server2 syslog-ng-3.0.5]# ls /usr/local/syslog-ng/
bin libexec sbin share
[root@server2 syslog-ng-3.0.5]# mkdir /usr/local/syslog-ng/etc
[root@server2 syslog-ng-3.0.5]# mkdir /usr/local/syslog-ng/var
[root@server2 syslog-ng-3.0.5]# cp contrib/syslog-ng.conf.RedHat /usr/local/syslog-ng/etc/
[root@server2 syslog-ng-3.0.5]# cp contrib/init.d.RedHat /etc/init.d/syslog-ng
[root@server2 syslog-ng-3.0.5]# cd /usr/local/syslog-ng/etc/
[root@server2 etc]# mv syslog-ng.conf.RedHat syslog-ng.conf
[root@server2 etc]# cat syslog-ng.conf
@version:3.0
options {
long_hostnames(off);
log_msg_size(8192);
flush_lines(1);
log_fifo_size(20480);
time_reopen(10);
use_dns(yes);
dns_cache(yes);
use_fqdn(yes);
keep_hostname(yes);
chain_hostnames(no);
perm(0644);
stats_freq(43200);
};
source s_internal { internal(); };
destination d_syslognglog { file("/var/log/syslog-ng.log"); };
log { source(s_internal); destination(d_syslognglog); };
source s_local {
unix-dgram("/dev/log");
file("/proc/kmsg" program_override("kernel:"));
};
filter f_messages { level(info..emerg); }; //定義7種日志類型
filter f_secure { facility(authpriv); };
filter f_mail { facility(mail); };
filter f_cron { facility(cron); };
filter f_emerg { level(emerg); };
filter f_spooler { level(crit..emerg) and facility(uucp, news); };
filter f_local7 { facility(local7); };
destination d_messages { file("/var/log/messages"); }; //定義7種類型日志在客戶端的位置
destination d_secure { file("/var/log/secure"); };
destination d_maillog { file("/var/log/maillog"); };
destination d_cron { file("/var/log/cron"); };
destination d_console { usertty("root"); };
destination d_spooler { file("/var/log/spooler"); };
destination d_bootlog { file("/var/log/dmesg"); };
log { source(s_local); filter(f_emerg); destination(d_console); };
log { source(s_local); filter(f_secure); destination(d_secure); flags(final); };
log { source(s_local); filter(f_mail); destination(d_maillog); flags(final); };
log { source(s_local); filter(f_cron); destination(d_cron); flags(final); };
log { source(s_local); filter(f_spooler); destination(d_spooler); };
log { source(s_local); filter(f_local7); destination(d_bootlog); };
log { source(s_local); filter(f_messages); destination(d_messages); };
# Remote logging //定義監聽的端口
source s_remote {
tcp(ip(0.0.0.0) port(514));
udp(ip(0.0.0.0) port(514));
};
//定義客戶端日志在服務器上保存的格式，位置和權限等
destination r_console {file("/var/log/syslog-ng/$YEAR$MONTH$DAY/$HOST/console" owner("root") group("root") perm(0640) dir_perm(0750) create_dirs(yes));};
destination r_secure {file("/var/log/syslog-ng/$YEAR$MONTH$DAY/$HOST/secure" owner("root") group("root") perm(0640) dir_perm(0750) create_dirs(yes));};
destination r_cron {file("/var/log/syslog-ng/$YEAR$MONTH$DAY/$HOST/cron" owner("root") group("root") perm(0640) dir_perm(0750) create_dirs(yes));};
destination r_spooler {file("/var/log/syslog-ng/$YEAR$MONTH$DAY/$HOST/spooler" owner("root") group("root") perm(0640) dir_perm(0750) create_dirs(yes));};
destination r_bootlog {file("/var/log/syslog-ng/$YEAR$MONTH$DAY/$HOST/bootlog" owner("root") group("root") perm(0640) dir_perm(0750) create_dirs(yes));};
destination r_messages {file("/var/log/syslog-ng/$YEAR$MONTH$DAY/$HOST/messages" owner("root") group("root") perm(0640) dir_perm(0750) create_dirs(yes));};
log { source(s_remote); filter(f_emerg); destination(r_console); };
log { source(s_remote); filter(f_secure); destination(r_secure); flags(final); };
log { source(s_remote); filter(f_cron); destination(r_cron); flags(final); };
log { source(s_remote); filter(f_spooler); destination(r_spooler); };
log { source(s_remote); filter(f_local7); destination(r_bootlog); };
log { source(s_remote); filter(f_messages); destination(r_messages); };
[root@server2 etc]# chmod +x /etc/init.d/syslog-ng
[root@server2 etc]# chkconfig --add syslog-ng
service syslog-ng does not support chkconfig(若出現該錯誤，請修改該腳本前四行如下)
[root@server2 etc]# head -4 /etc/init.d/syslog-ng
#!/bin/bash
#chkconifg: --add syslog-ng
#chkconfig: 2345 12 88
#Description: syslog-ng
該腳本還需要修改下面的三個位置
[root@server2 etc]# grep ‘PATH‘ /etc/init.d/syslog-ng
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/syslog-ng/bin:/usr/local/syslog-ng/sbin
[root@server2 etc]# grep 'INIT' /etc/init.d/syslog-ng |head -2
INIT_PROG="/usr/local/syslog-ng/sbin/syslog-ng" # Full path to daemon
INIT_OPTS="-f /usr/local/syslog-ng/etc/syslog-ng.conf" # options passed to daemon
[root@server2 etc]# service syslog-ng start
Starting syslog-ng: /usr/local/syslog-ng/sbin/syslog-ng: error while loading shared libraries: libevtlog.so.0: cannot open shared object file: No such file or directory
Starting Kernel Logger: 出現此錯誤是因為共享庫鏈接沒做好
[root@server2 etc]# ln -s /usr/local/eventlog/lib/* /lib/
出現下面的問題是因為主配置文件中缺少：@version:3.0這行
Starting syslog-ng: Configuration file has no version number, assuming syslog-ng 2.1 format. Please add @version: maj.min to the beginning of the file;
[root@server2 ~]# service syslog-ng start
Starting Kernel Logger: [ OK ]
[root@server2 etc]# cat /var/log/syslog-ng.log
Jan 28 03:59:07 server2.yang.com syslog-ng[20225]: syslog-ng starting up; version='3.0.5'
客戶端配置：
[root@client ~]# tail -1 /etc/syslog.conf
*.* @192.168.90.20
[root@client ~]# logger -i just one test
[root@client ~]# tail -1 /var/log/messages
Jan 27 22:12:02 client root[2861]: just one test
[root@server2 ~]# cat /var/log/syslog-ng/20100128/192.168.90.10/messages
Jan 28 04:24:32 192.168.90.10 root[2861]: just one test
[root@server2 ~]# cat /var/log/syslog-ng/20100128/192.168.90.10/secure
Jan 28 04:01:04 192.168.90.10 sshd[2832]: Accepted publickey for root from 192.168.90.1 port 48834 ssh3
Jan 28 04:01:04 192.168.90.10 sshd[2832]: pam_unix(sshd:session): session opened for user root by (uid=0)
參考網站：http://blog.sina.com.cn/s/blog_4a071ed80100cssu.html

前面配置好了syslog-ng,下面簡要的概述下如何將系統日志存入mysql
1：將mysql的頭文件和庫文件鏈接到/usr/local下
[root@server2 ~]# ln -s /usr/local/mysql/lib/mysql /usr/local/lib/mysql
[root@server2 ~]# ln -s /usr/local/mysql/include/mysql/ /usr/local/include
[root@server2 ~]# cd /usr/local/src/software/sqlsyslogd
2：下載sqlsyslogd源碼包，由于是整個目錄下載，所以會下載index.html打頭的索引文件
[root@server2 software]# wget -d -r -np http://www.frasunek.com/sources/security/sqlsyslogd/
[root@server2 software]# cd www.frasunek.com/sources/security/sqlsyslogd/
[root@server2 sqlsyslogd]# rm -rf index.html*
[root@server2 sqlsyslogd]# cd contrib/
[root@server2 contrib]# rm -rf index.html*
[root@server2 contrib]# cd
[root@server2 ~]# mv /usr/local/src/software/www.frasunek.com/sources/security/sqlsyslogd/ /usr/
local/src/software/
3:make,復制sqlsyslogd二進制程序到/usr/local/sbin目錄下
[root@server2 ~]# cd /usr/local/src/software/sqlsyslogd/
[root@server2 sqlsyslogd]# make
cc -O6 -Wall -pipe -I/usr/local/include -DCONF=\"/usr/local/etc/sqlsyslogd.conf\" -L/usr/local/lib/mysql -lmysqlclient sqlsyslogd.c -o sqlsyslogd
[root@server2 sqlsyslogd]# cp sqlsyslogd /usr/local/sbin/
4：執行下sqlsyslogd程序，出現下面的命令選項則說明安裝成功
[root@server2 sqlsyslogd]# sqlsyslogd
usage: sqlsyslogd [-h hostname] <-u username> [-p] <-t table> [database]
5：修改/etc/ld.so.conf文件，并使其生效，這個文件維護著編譯的動態鏈接庫位置
[root@server2 sqlsyslogd]# cat /etc/ld.so.conf
include ld.so.conf.d/*.conf
/usr/local/lib/mysql
[root@server2 sqlsyslogd]# ldconfig
6：在數據庫中創建相應的庫和表
[root@server2 sqlsyslogd]# mysql
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 158
Server version: 5.1.36-log Source distribution
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
mysql> create database syslog;
Query OK, 1 row affected (0.00 sec)
mysql> use syslog
Database changed
mysql> create table logs (Id int(10) NOT NULL auto_increment,Timestamp varchar(16),Host varchar(50),Prog varchar(50),Mesg text,PRIMARY KEY (id));
Query OK, 0 rows affected (0.01 sec)
mysql> exit
Bye
7：該文件定義了連接數據庫的密碼
[root@server2 sqlsyslogd]# cat /usr/local/etc/sqlsyslogd.conf
123456
8：在syslog-ng主配置文件中添加下列配置
[root@server2 sqlsyslogd]# vi /usr/local/syslog-ng/etc/syslog-ng.conf
destination sqlsyslogd{
program("/usr/local/sbin/sqlsyslogd -u root -t logs syslog -p");
};
log {
source(s_remote);
destination(sqlsyslogd);
};
9:重啟syslog-ng服務
[root@server2 sqlsyslogd]# service syslog-ng restart
Stopping Kernel Logger: [ OK ]
Starting Kernel Logger: [ OK ]
10:客戶端發消息測試
[root@server2 sqlsyslogd]# tail -1 /var/log/syslog-ng/20100226/192.168.90.1/messages
Feb 26 14:25:47 192.168.90.1 root[6058]: just for fun

感謝各位的閱讀！關于“如何使用syslog-ng搭建日志服務器”這篇文章就分享到這里了，希望以上內容可以對大家有一定的幫助，讓大家可以學到更多知識，如果覺得文章不錯，可以把它分享出去讓更多的人看到吧！