我正在创建一个logstash grok过滤器来从备份服务器中提取事件,我希望能够测试一个模式的字段,如果它与模式匹配,则进一步处理该字段并提取其他信息
为此,我在if
语句中嵌入了grok
语句。这导致测试在Error: Expected one of #, =>
之后立即if
失败。
这是过滤器声明:
filter {
grok {
patterns_dir => "./patterns"
# NetWorker logfiles have some unusual fields that include undocumented engineering codes and what not
# time is in 12h format (ugh) so custom patterns need to be used.
match => [ "message", "%{NUMBER:engcode1} %{DATESTAMP_12H:timestamp} %{NUMBER:engcode2} %{NUMBER:engcode3} %{NUMBER:engcode4} %{NUMBER:ppid} %{NUMBER:pid} %{NUMBER:engcode5} %{WORD:processhost} %{WORD:processname} %{GREEDYDATA:daemon_message}" ]
# attempt to find completed savesets and pull that info from the daemon_message field
if [daemon_message] =~ /done\ saving\ to\ pool/ {
grok {
match => [ "daemon_message", "%{WORD:savehost}\:%{WORD:saveset} done saving to pool \'%{WORD:pool}\' \(%{WORD:volume}\) %{WORD:saveset_size}" ]
}
}
}
date {
# This is requred to set the time from the logline to the timestamp and not have it create it's own.
# Note the use of the trailing 'a' to denote AM or PM.
match => ["timestamp", "MM/dd/yyyy HH:mm:ss a"]
}
}
此块失败并显示以下内容:
$ /opt/logstash/bin/logstash -f ./networker_daemonlog.conf --configtest
Error: Expected one of #, => at line 12, column 12 (byte 929) after # Basic dumb simple networker daemon log grok filter for the NetWorker daemon.log
# no smarts to this and not really pulling any useful info from the files (yet)
filter {
grok {
... lines deleted ...
# attempt to find completed savesets and pull that info from the daemon_message field
if
我是logstash的新手,我意识到在grok
语句中使用条件可能是不可能的,但我更喜欢以这种方式对其他match
行进行条件处理,因为这将raemon_message字段保留原样用于其他用途,同时提取我想要的数据。
ETA:我还应该指出,完全删除if
语句允许configtest通过,过滤器可以解析日志。
提前致谢...
答案 0 :(得分:14)
条件超出过滤器的范围,例如:
if [field] == "value" {
grok {
...
}
]
是正确的。在你的情况下,做第一个grok,然后测试运行第二个,即:
grok {
match => [ "message", "%{NUMBER:engcode1} %{DATESTAMP_12H:timestamp} %{NUMBER:engcode2} %{NUMBER:engcode3} %{NUMBER:engcode4} %{NUMBER:ppid} %{NUMBER:pid} %{NUMBER:engcode5} %{WORD:processhost} %{WORD:processname} %{GREEDYDATA:daemon_message}" ]
}
if [daemon_message] =~ /done\ saving\ to\ pool/ {
grok {
match => [ "daemon_message", "%{WORD:savehost}\:%{WORD:saveset} done saving to pool \'%{WORD:pool}\' \(%{WORD:volume}\) %{WORD:saveset_size}" ]
}
}
这实际上是为匹配的记录运行两个正则表达式。由于grok只会在正则表达式匹配时创建字段,因此您可以这样做:
grok {
match => [ "message", "%{NUMBER:engcode1} %{DATESTAMP_12H:timestamp} %{NUMBER:engcode2} %{NUMBER:engcode3} %{NUMBER:engcode4} %{NUMBER:ppid} %{NUMBER:pid} %{NUMBER:engcode5} %{WORD:processhost} %{WORD:processname} %{GREEDYDATA:daemon_message}" ]
}
grok {
match => [ "daemon_message", "%{WORD:savehost}\:%{WORD:saveset} done saving to pool \'%{WORD:pool}\' \(%{WORD:volume}\) %{WORD:saveset_size}" ]
}
您必须衡量实际日志文件的性能,因为这样会产生更少的regexp,但第二个更复杂。
如果你真的想要坚持下去,你可以使用break_on_match功能在一个grok {}中完成所有这些。