[英]Config file, logstash ruby filter event.get(“message”).match() Error
在 logstash 配置文件中,我試圖獲取要解析的 XML 數據。
這是我的配置文件:
input {
file {
path => "/home/elastic-stack/logstash-7.3.2/event-data/telmetry.log"
start_position => "beginning"
type => "sandbox-out"
codec => multiline {
pattern => "^</datastore-contents-xml>"
negate => "true"
what => "next"
}
}
http {
host => "127.0.0.1"
port => 8080
type => "sandbox-out"
}
}
filter {
grok {
match => { "message" => "\[%{USER:host_name} %{IP:ip_address} %{USER:session-id} %{NUMBER:session-id-num}\]"}
}
grok {
match => { "message" => "\Subscription Id \: %{BASE16NUM:subcription-id:int}"}
}
grok {
match => { "message" => "\Event time \: %{TIMESTAMP_ISO8601:event-time}"}
}
grok {
match => {"message" => "\<%{USERNAME:Statistic}\>"}
}
mutate {
remove_field => ["headers", "host_name", "session-id","message"]
}
date {
match => ["timestamp","dd/MMM/yyyy:HH:mm:ss Z"]
}
ruby { code => 'event.set("justXml", event.get("message").match(/.+(<datastore-contents-xml.*)/m)[1])' }
xml {
#remove_namespaces => "true"
#not even the namspace option is working to access the http link
source => "justXml"
target => "xml-content"
#force_array => "false"
xpath => [
"//*[name()='datastore-contents-xml']/*[name()='memory-statistics']/*[name()='memory-statistic'][1]/*[name()='name']/text()" , "name" ,
"//*[name()='datastore-contents-xml']/*[name()='memory-statistics']/*[name()='memory-statistic'][1]/*[name()='total-memory']/text()" , "total-memory",
"//*[name()='datastore-contents-xml']/*[name()='memory-statistics']/*[name()='memory-statistic'][1]/*[name()='used-memory']/text()" , "used-memory",
"//*[name()='datastore-contents-xml']/*[name()='memory-statistics']/*[name()='memory-statistic'][1]/*[name()='free-memory']/text()" , "free-memory" ,
"//*[name()='datastore-contents-xml']/*[name()='memory-statistics']/*[name()='memory-statistic'][1]/*[name()='lowest-memory']/text()" , "lowest-memory" ,
"//*[name()='datastore-contents-xml']/*[name()='memory-statistics']/*[name()='memory-statistic'][1]/*[name()='highest-memory']/text()" , "highest-memory"
]
#logstash is not dectecting any of these xpaths in the config
}
mutate {
convert => {
"total-memory" => "integer"
"used-memory" => "integer"
"free-memory" => "integer"
"lowest-memory" => "integer"
"highest-memory" => "integer"
}
}
}
output {
stdout {
codec => rubydebug
}
file {
path => "%{type}_%{+dd_MM_yyyy}.log"
}
}
所需的 output:
{
"ip_address" => "10.10.20.30",
"subcription-id" => 2147483650,
"event-time" => "2019-09-12 13:13:30.290000+00:00",
"host" => "127.0.0.1",
"Statistic" => "memory-statistic",
"type" => "sandbox-out",
"@version" => "1",
"@timestamp" => 2019-09-26T10:03:00.620Z,
"session-id-num" => "35"
"yang-model" => "http://cisco.com/ns/yang/Cisco-IOS-XE-memory-oper"
"name" => "Processor"
"total-memory" => 2238677360
"used-memory" => 340449924
"free-memory" => 1898227436
"lowest-usage" => 1897220640
"highest-usage" => 1264110388
}
錯誤:
[2019-09-27T09:18:55,622][ERROR][logstash.filters.ruby ] Ruby exception occurred: undefined method `match' for nil:NilClass
/home/elastic-stack/logstash-7.3.2/vendor/bundle/jruby/2.5.0/gems/awesome_print-1.7.0/lib/awesome_print/formatters/base_formatter.rb:31: warning: constant ::Fixnum is deprecated
{
"ip_address" => "10.10.20.30",
"subcription-id" => 2147483650,
"session-id-num" => "35",
"tags" => [
[0] "_rubyexception"
],
"Statistic" => "memory-statistic",
"event-time" => "2019-09-12 13:13:30.290000+00:00",
"type" => "sandbox-out",
"@version" => "1",
"host" => "127.0.0.1",
"@timestamp" => 2019-09-27T07:18:54.868Z
通過該錯誤,我已經知道問題出在 ruby 過濾器上,但我不知道如何解決。
此數據由 Cisco Telemetry 生成,我正在嘗試使用 Elastic Stack 獲取它。
錯誤似乎是該事件沒有message
字段,因此您不能在不存在的事物上調用match
。 我看到您在此 ruby 代碼中的message
字段上調用match
:
ruby { code => 'event.set("justXml", event.get("message").match(/.+(<datastore-contents-xml.*)/m)[1])' }
但是,您要在前幾行從事件中刪除message
字段:
mutate {
remove_field => ["headers", "host_name", "session-id","message"]
}
解決方案是僅在您不再需要它時刪除消息字段,我會將 remove_field 變異移動到filter
塊的末尾。
如果我可以添加,還有一個建議。 您有多個 grok 過濾器在同一個消息字段上運行:
grok {
match => { "message" => "\[%{USER:host_name} %{IP:ip_address} %{USER:session-id} %{NUMBER:session-id-num}\]"}
}
grok {
match => { "message" => "\Subscription Id \: %{BASE16NUM:subcription-id:int}"}
}
grok {
match => { "message" => "\Event time \: %{TIMESTAMP_ISO8601:event-time}"}
}
grok {
match => {"message" => "\<%{USERNAME:Statistic}\>"}
}
這可以簡化為(您可以查看Grok 過濾器文檔:
grok {
break_on_match => false,
match => {
"message" => [
"\[%{USER:host_name} %{IP:ip_address} %{USER:session-id} %{NUMBER:session-id-num}\]",
"\Subscription Id \: %{BASE16NUM:subcription-id:int}",
"\Event time \: %{TIMESTAMP_ISO8601:event-time}",
"\<%{USERNAME:Statistic}\>"
]
}
}
這樣,您只需要一個 grok 過濾器實例,因為它將通過列表中的模式 go 並且由於break_on_match=>false
它不會在第一次成功匹配后完成,但會確保提取它可以基於的所有字段在列表中的所有模式上。
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