在生产环境下，logstash 经常会遇到处理多种格式的日志，不同的日志格式，解析方法不同。下面来说说logstash处理多行日志的例子，对MySQL慢查询日志进行分析，这个经常遇到过，网络上疑问也很多。
MySQL慢查询日志格式如下：
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# User@Host: ttlsa[ttlsa] @ [10.4.10.12] Id: 69641319
# Query_time: 0.000148 Lock_time: 0.000023 Rows_sent: 0 Rows_examined: 202
SET timestamp=1456717595;
select `Id`, `Url` from `File` where `Id` in ('201319', '201300');
# Time: 160229 11:46:37
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filebeat配置
我这里是使用filebeat 1.1.1版本的，之前版本没有multiline配置项，具体方法看后面那种。
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filebeat:
prospectors:
-
paths:
- /www.ttlsa.com/logs/mysql/slow.log
document_type: mysqlslowlog
input_type: log
multiline:
negate: true
match: after
registry_file: /var/lib/filebeat/registry
output:
logstash:
hosts: ["10.6.66.14:5046"]
shipper:
logging:
files:
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logstash配置
1. input段配置
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# vi /etc/logstash/conf.d/01-beats-input.conf
input {
beats {
port => 5046
host => "10.6.66.14"
}
}
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2. filter 段配置
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# vi /etc/logstash/conf.d/16-mysqlslowlog.log
filter {
if [type] == "mysqlslowlog" {
grok {
match => { "message" => "(?m)^#s+User@Host:s+%{USER:user}[[^]]+]s+@s+(?:(?<clienthost>S*) )?[(?:%{IPV4:clientip})?]s+Id:s+%{NUMBER:row_id:int}
#s+Query_time:s+%{NUMBER:query_time:float}s+Lock_time:s+%{NUMBER:lock_time:float}s+Rows_sent:s+%{NUMBER:rows_sent:int}s+Rows_examined:s+%{NUMBER:rows_examined:int}
s*(?:use %{DATA:database};s*
)?SETs+timestamp=%{NUMBER:timestamp};
s*(?<sql>(?<action>w+).*;)s*(?:
#s+Time)?.*$" }
}
date {
match => [ "timestamp", "UNIX", "YYYY-MM-dd HH:mm:ss"]
remove_field => [ "timestamp" ]
}
}
}
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关键之重是grok正则的配置。
3. output段配置
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# vi /etc/logstash/conf.d/30-beats-output.conf
output {
if "_grokparsefailure" in [tags] {
file { path => "/var/log/logstash/grokparsefailure-%{[type]}-%{+YYYY.MM.dd}.log" }
}
if [@metadata][type] in [ "mysqlslowlog" ] {
elasticsearch {
hosts => ["10.6.66.14:9200"]
sniffing => true
manage_template => false
template_overwrite => true
index => "%{[@metadata][beat]}-%{[type]}-%{+YYYY.MM.dd}"
document_type => "%{[@metadata][type]}"
}
}
}
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标准输出结果截图
elasticsearch结果截图
如果是使用filebeat1.1.1之前的版本，配置如下：
1. filebeat配置
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filebeat:
prospectors:
-
paths:
- /www.ttlsa.com/logs/mysql/slow.log
document_type: mysqlslowlog
input_type: log
registry_file: /var/lib/filebeat/registry
output:
logstash:
hosts: ["10.6.66.14:5046"]
shipper:
logging:
files:
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2. logstash input段配置
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input {
beats {
port => 5046
host => "10.6.66.14"
codec => multiline {
pattern => "^# User@Host:"
negate => true
what => previous
}
}
}
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其它配置不变。
如有疑问跟帖，或者加群沟通。