在Logstash中使用grok解析多行JSON
我有一个格式的JSON:
{ "SOURCE":"Source A",
"Model":"ModelABC",
"Qty":"3"
}
我正在尝试使用logstash解析此JSON。基本上,我希望Logstash输出是可以使用kibana进行分析的key:value对的列表。我认为可以开箱即用。从大量的阅读中,我了解到我必须使用grok插件(我仍然不确定json插件的用途)。但是我无法获得所有领域的事件。我收到多个事件(甚至对于JSON的每个属性都一个)。像这样:
{ "message" => " \"SOURCE\": \"Source A\",",
"@version" => "1",
"@timestamp" => "2014-08-31T01:26:23.432Z",
"type" => "my-json",
"tags" => [
[0] "tag-json"
],
"host" => "myserver.example.com",
"path" => "/opt/mount/ELK/json/mytestjson.json"
}
{
"message" => " \"Model\": \"ModelABC\",",
"@version" => "1",
"@timestamp" => "2014-08-31T01:26:23.438Z",
"type" => "my-json",
"tags" => [
[0] "tag-json"
],
"host" => "myserver.example.com",
"path" => "/opt/mount/ELK/json/mytestjson.json"
}
{
"message" => " \"Qty\": \"3\",",
"@version" => "1",
"@timestamp" => "2014-08-31T01:26:23.438Z",
"type" => "my-json",
"tags" => [
[0] "tag-json"
],
"host" => "myserver.example.com",
"path" => "/opt/mount/ELK/json/mytestjson.json"
}
我应该使用多行编解码器还是json_lines编解码器?如果是这样,我该怎么做?我是否需要编写自己的grok模式,或者是否有JSON通用的东西,可以为我在上述一个事件中获得的key:value对提供一个事件?我找不到任何可以说明这一点的文档。任何帮助,将不胜感激。我的配置文件如下所示:
input{
file
{
type => "my-json"
path => ["/opt/mount/ELK/json/mytestjson.json"]
codec => json
tags => "tag-json"
}
}
filter
{
if [type] == "my-json"
{
date { locale => "en" match => [ "RECEIVE-TIMESTAMP", "yyyy-mm-dd HH:mm:ss" ] }
}
}
output
{
elasticsearch
{
host => localhost
}
stdout { codec => rubydebug }
}
回答:
我想我找到了解决我问题的可行方法。我不确定这是否是一种干净的解决方案,但它有助于解析上述类型的多行JSON。
input {
file
{
codec => multiline
{
pattern => '^\{'
negate => true
what => previous
}
path => ["/opt/mount/ELK/json/*.json"]
start_position => "beginning"
sincedb_path => "/dev/null"
exclude => "*.gz"
}
}
filter
{
mutate
{
replace => [ "message", "%{message}}" ]
gsub => [ 'message','\n','']
}
if [message] =~ /^{.*}$/
{
json { source => message }
}
}
output
{
stdout { codec => rubydebug }
}
我的多行编码解码器无法处理最后一个花括号,因此不会以JSON形式出现json { source => message }
。因此,mutate过滤器:
replace => [ "message", "%{message}}" ]
那增加了缺少的括号。和
gsub => [ 'message','\n','']
删除\n
引入的字符。最后,我有一个单行JSON,可以读取json { source => message }
如果有一种更干净/更简便的方法将原始的多行JSON转换为单行JSON,请执行POST,因为我觉得上述内容不太干净。
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