在生产环境中，存在一台日志服务器，专门用来记录其他服务器的日志信息是个很好的主意，不过用红帽自带的syslog，配置虽然简单，但是日志却没有办法分离，默认都堆在/var/log/message文件里面，用来超不爽，下面来介绍下用syslog-ng来构建日志服务器，这个还支持将日志导入数据库和通过网页来发布日志，听起来功能相当的强大，接下来要好好的研究下咯……
环境介绍
日志服务器IP：192.168.90.20；客户端IP：192.168.90.10
系统：RHEL5.4
实现目标：将客户端的日志自动保存在服务器端的相应目录，并根据日期，IP地址和日志类型进行分开保存
备注：由于在虚拟机环境下操作，服务器于客户端时间未同步，所以会存在记录日志时间不一致的现象；
[root@server2 ~]# cd /usr/local/src/tarbag/
[root@server2 tarbag]# wget
[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
[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
[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? (若出现这个错误，基本上是由于前面的PKG_CONFIG_PATH变量没指定好)
[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); }; //定义7种日志类型
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"); }; //定义7种类型日志在客户端的位置
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 //定义监听的端口
source s_remote {
tcp(ip(0.0.0.0) port(514));
udp(ip(0.0.0.0) port(514));
};
//定义客户端日志在服务器上保存的格式，位置和权限等
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(若出现该错误，请修改该脚本前四行如下)
[root@server2 etc]# head -4 /etc/init.d/syslog-ng
#!/bin/bash
#chkconifg: --add syslog-ng
#chkconfig: 2345 12 88
#Description: syslog-ng