Re: [Nolug] SYSLOG Recommendation?

Joey Kelly wrote:
> I haven't done it, but syslog on *nix is able to receive log info
> from other
> machines. Once there, you ought to be able to parse for each host.

syslog-ng will do what you want, charles. There is a learning curve of
course to do the kind of detailed sorting I suspect you need. But I
have done it with syslog-ng combining in remote log. It's a big step up
from standard unix syslog utilities. It builds and runs on Solaris as
well.

Debian has a nice default config doing fairly advanced sorting as does
gentoo.

zenarcade # more /etc/syslog-ng/syslog-ng.conf
# Configuration file for syslog-ng under Debian
#
# attempts at reproducing default syslog behavior

# the standard syslog levels are (in descending order of priority):
# emerg alert crit err warning notice info debug
# the aliases "error", "panic", and "warn" are deprecated
# the "none" priority found in the original syslogd configuration is
# only used in internal messages created by syslogd

######
# options

options {
        # disable the chained hostname format in logs
        # (default is enabled)
        chain_hostnames(0);

        # the time to wait before a died connection is re-established
        # (default is 60)
        time_reopen(10);

        # the time to wait before an idle destination file is closed
        # (default is 60)
        time_reap(360);

        # the number of lines buffered before written to file
        # you might want to increase this if your disk isn't catching with
        # all the log messages you get or if you want less disk activity
        # (say on a laptop)
        # (default is 0)
        #sync(0);

        # the number of lines fitting in the output queue
        log_fifo_size(2048);

        # enable or disable directory creation for destination files
        create_dirs(yes);

        # default owner, group, and permissions for log files
        # (defaults are 0, 0, 0600)
        #owner(root);
        group(adm);
        perm(0640);

        # default owner, group, and permissions for created directories
        # (defaults are 0, 0, 0700)
        #dir_owner(root);
        #dir_group(root);
        dir_perm(0755);

        # enable or disable DNS usage
        # syslog-ng blocks on DNS queries, so enabling DNS may lead to
        # a Denial of Service attack
        # (default is yes)
        use_dns(no);

        # maximum length of message in bytes
        # this is only limited by the program listening on the /dev/log Unix
        # socket, glibc can handle arbitrary length log messages, but -- for
        # example -- syslogd accepts only 1024 bytes
        # (default is 2048)
        #log_msg_size(2048);
};

######
# sources

# all known message sources
source s_all {
        # message generated by Syslog-NG
        internal();
        # standard Linux log source (this is the default place for the
syslog()
        # function to send logs to)
        unix-stream("/dev/log");
        # messages from the kernel
        file("/proc/kmsg" log_prefix("kernel: "));
        # use the above line if you want to receive remote UDP logging
messages
        # (this is equivalent to the "-r" syslogd flag)
        # udp();
};

######
# destinations

# some standard log files
destination df_auth { file("/var/log/auth.log"); };
destination df_syslog { file("/var/log/syslog"); };
destination df_cron { file("/var/log/cron.log"); };
destination df_daemon { file("/var/log/daemon.log"); };
destination df_kern { file("/var/log/kern.log"); };
destination df_lpr { file("/var/log/lpr.log"); };
destination df_mail { file("/var/log/mail.log"); };
destination df_user { file("/var/log/user.log"); };
destination df_uucp { file("/var/log/uucp.log"); };

# these files are meant for the mail system log files
# and provide re-usable destinations for {mail,cron,...}.info,
# {mail,cron,...}.notice, etc.
destination df_facility_dot_info { file("/var/log/$FACILITY.info"); };
destination df_facility_dot_notice { file("/var/log/$FACILITY.notice"); };
destination df_facility_dot_warn { file("/var/log/$FACILITY.warn"); };
destination df_facility_dot_err { file("/var/log/$FACILITY.err"); };
destination df_facility_dot_crit { file("/var/log/$FACILITY.crit"); };

# these files are meant for the news system, and are kept separated
# because they should be owned by "news" instead of "root"
destination df_news_dot_notice { file("/var/log/news/news.notice"
owner("news")); };
destination df_news_dot_err { file("/var/log/news/news.err"
owner("news")); };
destination df_news_dot_crit { file("/var/log/news/news.crit"
owner("news")); };

# some more classical and useful files found in standard syslog
configurations
destination df_debug { file("/var/log/debug"); };
destination df_messages { file("/var/log/messages"); };

# pipes
# a console to view log messages under X
destination dp_xconsole { pipe("/dev/xconsole"); };

# consoles
# this will send messages to everyone logged in
destination du_all { usertty("*"); };

######
# filters

# all messages from the auth and authpriv facilities
filter f_auth { facility(auth, authpriv); };

# all messages except from the auth and authpriv facilities
filter f_syslog { not facility(auth, authpriv); };

# respectively: messages from the cron, daemon, kern, lpr, mail, news, user,
# and uucp facilities
filter f_cron { facility(cron); };
filter f_daemon { facility(daemon); };
filter f_kern { facility(kern); };
filter f_lpr { facility(lpr); };
filter f_mail { facility(mail); };
filter f_news { facility(news); };
filter f_user { facility(user); };
filter f_uucp { facility(uucp); };

# some filters to select messages of priority greater or equal to info,
warn,
# and err
# (equivalents of syslogd's *.info, *.warn, and *.err)
filter f_at_least_info { level(info..emerg); };
filter f_at_least_notice { level(notice..emerg); };
filter f_at_least_warn { level(warn..emerg); };
filter f_at_least_err { level(err..emerg); };
filter f_at_least_crit { level(crit..emerg); };

# all messages of priority debug not coming from the auth, authpriv,
news, and
# mail facilities
filter f_debug { level(debug) and not facility(auth, authpriv, news,
mail); };

# all messages of info, notice, or warn priority not coming form the auth,
# authpriv, cron, daemon, mail, and news facilities
filter f_messages {
        level(info,notice,warn)
            and not facility(auth,authpriv,cron,daemon,mail,news);
};

# messages with priority emerg
filter f_emerg { level(emerg); };

# complex filter for messages usually sent to the xconsole
filter f_xconsole {
    facility(daemon,mail)
        or level(debug,info,notice,warn)
        or (facility(news)
                and level(crit,err,notice));
};

######
# logs
# order matters if you use "flags(final);" to mark the end of processing
in a
# "log" statement

# these rules provide the same behavior as the commented original
syslogd rules

# auth,authpriv.* /var/log/auth.log
log {
        source(s_all);
        filter(f_auth);
        destination(df_auth);
};

# *.*;auth,authpriv.none -/var/log/syslog
log {
        source(s_all);
        filter(f_syslog);
        destination(df_syslog);
};

# this is commented out in the default syslog.conf
# cron.* /var/log/cron.log
#log {
# source(s_all);
# filter(f_cron);
# destination(df_cron);
#};

# daemon.* -/var/log/daemon.log
log {
        source(s_all);
        filter(f_daemon);
        destination(df_daemon);
};

# kern.* -/var/log/kern.log
log {
        source(s_all);
        filter(f_kern);
        destination(df_kern);
};

# lpr.* -/var/log/lpr.log
log {
        source(s_all);
        filter(f_lpr);
        destination(df_lpr);
};

# mail.* -/var/log/mail.log
log {
        source(s_all);
        filter(f_mail);
        destination(df_mail);
};

# user.* -/var/log/user.log
log {
        source(s_all);
        filter(f_user);
        destination(df_user);
};

# uucp.* /var/log/uucp.log
log {
        source(s_all);
        filter(f_uucp);
        destination(df_uucp);
};

# mail.info -/var/log/mail.info
log {
        source(s_all);
        filter(f_mail);
        filter(f_at_least_info);
        destination(df_facility_dot_info);
};

# mail.warn -/var/log/mail.warn
log {
        source(s_all);
        filter(f_mail);
        filter(f_at_least_warn);
        destination(df_facility_dot_warn);
};

# mail.err /var/log/mail.err
log {
        source(s_all);
        filter(f_mail);
        filter(f_at_least_err);
        destination(df_facility_dot_err);
};

# news.crit /var/log/news/news.crit
log {
        source(s_all);
        filter(f_news);
        filter(f_at_least_crit);
        destination(df_news_dot_crit);
};

# news.err /var/log/news/news.err
log {
        source(s_all);
        filter(f_news);
        filter(f_at_least_err);
        destination(df_news_dot_err);
};

# news.notice /var/log/news/news.notice
log {
        source(s_all);
        filter(f_news);
        filter(f_at_least_notice);
        destination(df_news_dot_notice);
};

# *.=debug;\
# auth,authpriv.none;\
# news.none;mail.none -/var/log/debug
log {
        source(s_all);
        filter(f_debug);
        destination(df_debug);
};

# *.=info;*.=notice;*.=warn;\
# auth,authpriv.none;\
# cron,daemon.none;\
# mail,news.none -/var/log/messages
log {
        source(s_all);
        filter(f_messages);
        destination(df_messages);
};

# *.emerg *
log {
        source(s_all);
        filter(f_emerg);
        destination(du_all);
};

# daemon.*;mail.*;\
# news.crit;news.err;news.notice;\
# *.=debug;*.=info;\
# *.=notice;*.=warn |/dev/xconsole
log {
        source(s_all);
        filter(f_xconsole);
        destination(dp_xconsole);
};

-- 
Scott Harney<scotth@scottharney.com>
"Asking the wrong questions is the leading cause of wrong answers"
gpg key fingerprint=7125 0BD3 8EC4 08D7 321D CEE9 F024 7DA6 0BC7 94E5
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