http://xiaorui.cc/2015/01/27/logstash%E4%BD%BF%E7%94%A8grok%E6%AD%A3%E5%88%99%E8%A7%A3%E6%9E%90%E6%97%A5%E5%BF%97%E9%81%87%E5%88%B0%E7%9A%84%E9%97%AE%E9%A2%98/

http://grokdebug.herokuapp.com/

demo:http://www.tuicool.com/articles/M7ryEv

Logstash 最佳实践：http://udn.yyuap.com/doc/logstash-best-practice-cn/filter/grok.html

logstash filter 语法：

Example

下面是日志的样子

55.3.244.1 GET /index.html 15824 0.043

正则的例子

%{IP:client} %{WORD:method} %{URIPATHPARAM:request} %{NUMBER:bytes} %{NUMBER:duration}

配置文件里是怎么写得？ 

input {

  file {

    path => “/var/log/http.log”

  }

}

filter {

  grok {

    match => [ "message", "%{IP:client} %{WORD:method} %{URIPATHPARAM:request} %{NUMBER:bytes} %{NUMBER:duration}" ]

  }

}

解析后，是个什么样子？ 

client: 55.3.244.1

method: GET

request: /index.html

bytes: 15824

duration: 0.043

自定义正则

(?<field_name>the pattern here)

(?<queue_id>[0-9A-F]{10,11})

当然你也可以把众多的正则，放在一个集中文件里面。

# in ./patterns/postfix

POSTFIX_QUEUEID [0-9A-F]{10,11}

filter {

  grok {

    patterns_dir => “./patterns”

    match => [ "message", "%{SYSLOGBASE} %{POSTFIX_QUEUEID:queue_id}: %{GREEDYDATA:syslog_message}" ]

  }

}

############

logstash已经自带了不少的正则，如果想偷懒的话，可以在内置正则里借用下。 

USERNAME [a-zA-Z0-9._-]+

USER %{USERNAME}

INT (?:[+-]?(?:[0-9]+))

BASE10NUM (?<![0-9.+-])(?>[+-]?(?:(?:[0-9]+(?:\.[0-9]+)?)|(?:\.[0-9]+)))

NUMBER (?:%{BASE10NUM})

BASE16NUM (?<![0-9A-Fa-f])(?:[+-]?(?:0x)?(?:[0-9A-Fa-f]+))

BASE16FLOAT \b(?<![0-9A-Fa-f.])(?:[+-]?(?:0x)?(?:(?:[0-9A-Fa-f]+(?:\.[0-9A-Fa-f]*)?)|(?:\.[0-9A-Fa-f]+)))\b

POSINT \b(?:[1-9][0-9]*)\b

NONNEGINT \b(?:[0-9]+)\b

WORD \b\w+\b

NOTSPACE \S+

SPACE \s*

DATA .*?

GREEDYDATA .*

QUOTEDSTRING (?>(?<!\\)(?>”(?>\\.|[^\\"]+)+”|”"|(?>’(?>\\.|[^\\']+)+’)|”|(?>(?>\\.|[^\]+)+)|`))

UUID [A-Fa-f0-9]{8}-(?:[A-Fa-f0-9]{4}-){3}[A-Fa-f0-9]{12}

# Networking

MAC (?:%{CISCOMAC}|%{WINDOWSMAC}|%{COMMONMAC})

CISCOMAC (?:(?:[A-Fa-f0-9]{4}\.){2}[A-Fa-f0-9]{4})

WINDOWSMAC (?:(?:[A-Fa-f0-9]{2}-){5}[A-Fa-f0-9]{2})

COMMONMAC (?:(?:[A-Fa-f0-9]{2}:){5}[A-Fa-f0-9]{2})

IPV6 ((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?

IPV4 (?<![0-9])(?:(?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2})[.](?:25[0-5]|2[0-4][0-9]|[0-1]?[0-9]{1,2}))(?![0-9])

IP (?:%{IPV6}|%{IPV4})

HOSTNAME \b(?:[0-9A-Za-z][0-9A-Za-z-]{0,62})(?:\.(?:[0-9A-Za-z][0-9A-Za-z-]{0,62}))*(\.?|\b)

HOST %{HOSTNAME}

IPORHOST (?:%{HOSTNAME}|%{IP})

HOSTPORT (?:%{IPORHOST=~/\./}:%{POSINT})

# paths

PATH (?:%{UNIXPATH}|%{WINPATH})

UNIXPATH (?>/(?>[\w_%!$@:.,-]+|\\.)*)+

TTY (?:/dev/(pts|tty([pq])?)(\w+)?/?(?:[0-9]+))

WINPATH (?>[A-Za-z]+:|\\)(?:\

^\\?*]*)+

URIPROTO [A-Za-z]+(\+[A-Za-z+]+)?

URIHOST %{IPORHOST}(?::%{POSINT:port})?

# uripath comes loosely from RFC1738, but mostly from what Firefox

# doesn’t turn into %XX

URIPATH (?:/[A-Za-z0-9$.+!*'(){},~:;=@#%_\-]*)+

#URIPARAM \?(?:[A-Za-z0-9]+(?:=(?:[^&]*))?(?:&(?:[A-Za-z0-9]+(?:=(?:[^&]*))?)?)*)?

URIPARAM \?[A-Za-z0-9$.+!*’|(){},~@#%&/=:;_?\-\[

]*

URIPATHPARAM %{URIPATH}(?:%{URIPARAM})?

URI %{URIPROTO}://(?:%{USER}(?::[^@]*)?@)?(?:%{URIHOST})?(?:%{URIPATHPARAM})?

# Months: January, Feb, 3, 03, 12, December

MONTH \b(?:Jan(?:uary)?|Feb(?:ruary)?|Mar(?:ch)?|Apr(?:il)?|May|Jun(?:e)?|Jul(?:y)?|Aug(?:ust)?|Sep(?:tember)?|Oct(?:ober)?|Nov(?:ember)?|Dec(?:ember)?)\b

MONTHNUM (?:0?[1-9]|1[0-2])

MONTHDAY (?:(?:0[1-9])|(?:[12][0-9])|(?:3[01])|[1-9])

# Days: Monday, Tue, Thu, etc…

DAY (?:Mon(?:day)?|Tue(?:sday)?|Wed(?:nesday)?|Thu(?:rsday)?|Fri(?:day)?|Sat(?:urday)?|Sun(?:day)?)

# Years?

YEAR (?>\d\d){1,2}

HOUR (?:2[0123]|[01]?[0-9])

MINUTE (?:[0-5][0-9])

# ’60′ is a leap second in most time standards and thus is valid.

SECOND (?:(?:[0-5][0-9]|60)(?:[:.,][0-9]+)?)

TIME (?!<[0-9])%{HOUR}:%{MINUTE}(?::%{SECOND})(?![0-9])

# datestamp is YYYY/MM/DD-HH:MM:SS.UUUU (or something like it)

DATE_US %{MONTHNUM}[/-]%{MONTHDAY}[/-]%{YEAR}

DATE_EU %{MONTHDAY}[./-]%{MONTHNUM}[./-]%{YEAR}

ISO8601_TIMEZONE (?:Z|[+-]%{HOUR}(?::?%{MINUTE}))

ISO8601_SECOND (?:%{SECOND}|60)

TIMESTAMP_ISO8601 %{YEAR}-%{MONTHNUM}-%{MONTHDAY}[T ]%{HOUR}:?%{MINUTE}(?::?%{SECOND})?%{ISO8601_TIMEZONE}?

DATE %{DATE_US}|%{DATE_EU}

DATESTAMP %{DATE}[- ]%{TIME}

TZ (?:[PMCE][SD]T|UTC)

DATESTAMP_RFC822 %{DAY} %{MONTH} %{MONTHDAY} %{YEAR} %{TIME} %{TZ}

DATESTAMP_OTHER %{DAY} %{MONTH} %{MONTHDAY} %{TIME} %{TZ} %{YEAR}

# Syslog Dates: Month Day HH:MM:SS

SYSLOGTIMESTAMP %{MONTH} +%{MONTHDAY} %{TIME}

PROG (?:[\w._/%-]+)

SYSLOGPROG %{PROG:program}(?:

)?

SYSLOGHOST %{IPORHOST}

SYSLOGFACILITY <%{NONNEGINT:facility}.%{NONNEGINT:priority}>

HTTPDATE %{MONTHDAY}/%{MONTH}/%{YEAR}:%{TIME} %{INT}

# Shortcuts

QS %{QUOTEDSTRING}

# Log formats

SYSLOGBASE %{SYSLOGTIMESTAMP:timestamp} (?:%{SYSLOGFACILITY} )?%{SYSLOGHOST:logsource} %{SYSLOGPROG}:

COMMONAPACHELOG %{IPORHOST:clientip} %{USER:ident} %{USER:auth}

“(?:%{WORD:verb} %{NOTSPACE:request}(?: HTTP/%{NUMBER:httpversion})?|%{DATA:rawrequest})” %{NUMBER:response} (?:%{NUMBER:bytes}|-)

COMBINEDAPACHELOG %{COMMONAPACHELOG} %{QS:referrer} %{QS:agent}

# Log Levels

LOGLEVEL ([A-a]lert|ALERT|[T|t]race|TRACE|[D|d]ebug|DEBUG|[N|n]otice|NOTICE|[I|i]nfo|INFO|[W|w]arn?(?:ing)?|WARN?(?:ING)?|[E|e]rr?(?:or)?|ERR?(?:OR)?|[C|c]rit?(?:ical)?|CRIT?(?:ICAL)?|[F|f]atal|FATAL|[S|s]evere|SEVERE|EMERG(?:ENCY)?|[Ee]merg(?:ency)?)

Logstash 最佳实践

http://udn.yyuap.com/doc/logstash-best-practice-cn/index.html

https://www.gitbook.com/book/chenryn/kibana-guide-cn

配置示例

input{

    file {

        path => ["/var/log/*.log", "/var/log/message"]

        type => "system"

        start_position => "beginning"

    }

}

解释

有一些比较有用的配置项，可以用来指定 FileWatch 库的行为：

discover_interval

logstash 每隔多久去检查一次被监听的 path 下是否有新文件。默认值是 15 秒。

exclude

不想被监听的文件可以排除出去，这里跟 path 一样支持 glob 展开。

sincedb_path

如果你不想用默认的 $HOME/.sincedb(Windows 平台上在C:\Windows\System32\config\systemprofile\.sincedb)，可以通过这个配置定义 sincedb 文件到其他位置。

sincedb_write_interval

logstash 每隔多久写一次 sincedb 文件，默认是 15 秒。

stat_interval

logstash 每隔多久检查一次被监听文件状态（是否有更新），默认是 1 秒。

start_position

logstash 从什么位置开始读取文件数据，默认是结束位置，也就是说 logstash 进程会以类似 tail -F 的形式运行。如果你是要导入原有数据，把这个设定改成 "beginning"，logstash 进程就从头开始读取，有点类似cat，但是读到最后一行不会终止，而是继续变成 tail -F。