I followed logstash documentation about multiline and tried to experiment it with a basic stdin & stdout configuration, but it does not seem to work. The tag "multiline" is added on the next messages, but they end as separate entries with a "_grokparsefailure" tag.
What am I missing?
Edit: as a reference I was using a stacktrace multiline filter.
Ok that one was a bit tricky, so I thought it might be appreciated if I gave here the solution. I found it in this post: multiline triggers only if the next lines come quickly (within 1~2 second). So when experimenting, if you take your time copying and pasting each line you will think it doesn't work while it actually does.
Please follow the example mentioned in the blog. I successfully implemented multiline with this approach.
For more clarification, please provide your config along with sample input message.
This is my configuration. I use the example from Logstash multiline
input {
stdin {
}
}
filter {
multiline {
# Grok pattern names are valid! :)
pattern => "^%{TIMESTAMP_ISO8601} "
negate => true
what => previous
}
}
output {
stdout {debug => true}
}
With this logs, The multiline function is work on me.
2014-02-24 10:00:01 abcde
1qaz
2014-01-01 11:11:11
2wsx
I enter the logs one by one and wait for 1 minute between each line. So, I didn't have meet your problem. Please verify your configuration.
Related
I would like to move name property to the top of the block like this.
There are many resouce block in a file.
Before
resource "datadog_monitor" "A" {
enable_logs_sample = "true"
name = "name"
tags = ["env:dev"]
}
resource "datadog_monitor" "B" {
enable_logs_sample = "true"
name = "name"
tags = ["env:dev"]
}
After
resource "datadog_monitor" "A" {
name = "name"
enable_logs_sample = "true"
tags = ["env:dev"]
}
resource "datadog_monitor" "B" {
name = "name"
enable_logs_sample = "true"
tags = ["env:dev"]
}
OK, I think :help :global and the range/address mechanism is one of Vim's best and most underrated feature so it might deserve a detailed run down.
The core editing pattern is the same as in the commands I suggested in my previous answer to a similar question of yours:
on each line matching a specific regular expression pattern,
do something.
Note that it is a "pattern", not a one-off trick. You are not supposed to "learn" this answer by heart, or commit it to "muscle memory", or bookmark it for the next time you have the exact same problem. Instead, you are supposed to grok the logic behind it in a way that allows you to:
recognize a situation where it might come handy,
apply it without too much thinking.
So, in order to implement the editing pattern described above, we use the :global command, which works like this:
:[range]global/<pattern>/[range]<command>
where:
in range (optional, default is %),
mark each line matching <pattern>,
then execute <command> on range (optional, default is .).
Like lots of things in Vim, :global is conceptually cool but not necessarily useful on its own. The more familiar you are with ranges/addresses and the more Ex commands you know, the more useful it is.
In this specific case, ranges don't matter much but addresses and Ex commands do… and their sum makes problems like these solvable in, IMO, a pretty intuitive way.
Now, let's go back to our problem:
move every "name" line to the top of the block
and express it in terms that match our editing pattern:
mark every line matching name,
then move it below the closest line above matching resource.
Which is a simple:
:g/name/m?resource?
Of course, the exact regular expression patterns to use are context-dependent.
The trick is to internalize the patterns so that you already know how to use any new building block you might come upon.
There is really nothing even remotely god-like, here.
This does what I want, but going via to_ruby seems unnecessary:
doc = Psych.parse("foo: 123")
doc.to_ruby.to_yaml
# => "---\nfoo: 123\n"
When I try to do this, I get an error:
DEV 16:49:08 >> Psych.parse("foo: 123").to_yaml
RuntimeError: expected STREAM-START
from /opt/…/lib/ruby/2.5.0/psych/visitors/emitter.rb:42:in `start_mapping'
I get the impression that the input needs to be a stream of some sort, but I don't quite get what incantation I need. Any ideas?
(The problem I'm trying to solve here, by the way (in case you know of a better way) is to fix some YAML that can't be deserialised into Ruby, because it references classes that don't exist. The YAML is quite complex, so I don't want to just search-and-replace in the YAML string. My thinking was that I could use Psych.parse to get a syntax tree, modify that tree, then dump it back into a YAML string.)
Figured out the incantation after finding the higher-level docs at https://ruby-doc.org//stdlib-2.3.0_preview1/libdoc/psych/rdoc/Psych/Nodes.html, though please let me know if there's a better way:
doc = Psych.parse("foo: 123")
stream = Psych::Nodes::Stream.new
stream.children << doc
stream.to_yaml
# => "foo: 123\n"
This topic is related but skips the part interesting for me.
I'm using filebeat to read CA Service Desk Manager logs written in a custom format which I cannot change. A single log line looks something like this:
11/07 13:05:26.65 <hostname> dbmonitor_nxd 9192 SIGNIFICANT bpobject.c 2587 Stats: imp(0) lcl(0) rmt(1,1) rmtref(0,0) dbchg(0)
As you can see the date in the beginning has no year information.
I then use logstash to parse the date from the log line. I've got the extra pattern TIMESTAMP defined like this:
TIMESTAMP %{MONTHNUM}[/]%{MONTHDAY}%{SPACE}%{TIME}
And then in logstash.conf I have the following filter:
grok {
patterns_dir => ["./patterns"]
match => { "message" => [
"%{TIMESTAMP:time_stamp}%{SPACE}%{WORD:server_name}%{SPACE}%{DAEMONNAME:object_name}%{SPACE}%{INT:object_id:int}%{SPACE}%{WORD:event_type}%{SPACE}%{USERNAME:object_file}%{SPACE}%{INT:object_line_number:int}%{SPACE}%{GREEDYDATA:log_message}"
]
}
}
date{
match => ["time_stamp", "MM/d HH:mm:ss.SS", "MM/dd HH:mm:ss.SS", "ISO8601"]
}
Currently I have to rely on the automatic timestamp as the time_stamp is indexed as text and I've been fine so far, but occasionally the time the log line was written on the server is not the same as the time it was pushed into ES. Around new year I fear I will run into trouble with this and how the year is deducted from the current time. My questions are:
Is it possible to parse a date field from the data given?
Is there a way to write some advanced logic for the date conversion?
As we're not past the new year yet, is there a way to manually check/ensure the automatic conversion is done correctly?
I have a set of log file which each file log is for specific machine.
What i am trying to achieve is to use the multiline{} filter to join the multi-line messages in each of the file because i would like to have a single #timestamp for each file.
example data in the log file
title
description
test1
test pass
test end
filter {
multiline {
pattern => "from_start_line to end of line"
what => "previous"
negate => true
}
}
I just want to make all the data in the log file as single event without using the pattern.
pretty much like telling logstash to make a multi-line event until EOF.
You can't do like that. Because logstash will always keep monitoring the file. Therefore the EOF is meaningless for it.
The other way you can do is add some pattern to the end of the logs. For example, add log_end to the end of each log output.
title
description
test1
test pass
test end-log_end
Then you can use this pattern to multiline all the logs.
multiline {
pattern => "log_end$"
negate => true
what => "next"
}
Hope this can help you.
I'm currently building a code generator, which aims to generate boiler plate for me once I write the templates and/or translations, in whatever language I have to work with.
I have a problem with a regex in Ruby. The regex aims to select whatever is between {{{ and }}}, so I can generate functions according to my needs.
My regex is currently :
/\{\{\{(([a-zA-Z]|\s)+)\}\}\}/m
My test data set is:
{{{Demande aaa}}} => {{{tagadatsouintsouin tutu}}}
The results are:
[["Demande aaa", "a"], ["tagadatsouintsouin tutu", "u"]]
Each time the regex picks the last character twice. That's not exactly what I want, I need something more like this:
/\{\{\{((\w|\W)+)\}\}\}/m
But this has a flaw too, the results are:
[["Demande aaa}}} => {{{tagadatsouintsouin tutu", "u"]]
Whereas, I wish to get:
[["Demande aaa"],["tagadatsouintsouin tutu"]]
How do I correct these regexes? I could use two sets of delimiters, but it won't teach me anything.
Edit :
All your regex run against my data sample, so you all got a point.
Regex may be overkill, and probably are overkill for my purpose. So i have two questions.
First, do the regex keep the same exact indentation ? This should be able to handle whole functions.
Second, is there something fitter for that task ?
Detailled explanation of the purpose of this tool. I'm bored to write boiler plate code in php - symfony. So i wish to generate this according to templates.
My intent is to build some views, some controllers, and even parts of model this way.
Pratical example : In my model, i wish to generate some functions according to the type of an object's attribute. For examples, i have functions displaying correctly money. So i need to build the corect function, according to my attribute, and then put in , inside m output file.
So there is some translations which themselves need translations.
So a fictive example :
{{{euro}}} => {{{ function getMyAttributeEuro()
{
return formating($this->get[[MyAttribute]]);
} }}}
In order to stock my translations, should i use regex, like
I wish to build something a bit clever, so it can build most of the basic code with no bug. So i can work on interesting code.
You have one set of capturing parentheses too many.
/\{\{\{([a-zA-Z\s]+)\}\}\}/
Also, you don't need the /m modifier because there is no dot (.) in your regex whose behaviour would be affected by it.
I'm partial to:
data = '{{{Demande aaa}}} => {{{tagadatsouintsouin tutu}}}'
data.scan(/\{{3}(.+?)}{3}/).flatten.map{ |r| r.squeeze(' ') }
=> ["Demande aaa", "tagadatsouintsouin tutu"]
or:
data.scan(/\{{3}(.+?)}{3}/).flatten.map{ |r| [ r.squeeze(' ') ] }
=> [["Demande aaa"], ["tagadatsouintsouin tutu"]]
or:
data.scan(/\{{3}(.+?)}{3}/).map{ |r| [ r[0].squeeze(' ') ] }
=> [["Demande aaa"], ["tagadatsouintsouin tutu"]]
if you need the sub-arrays.
I'm not big on trying to everything possible inside the regex. I prefer to keep it short and sweet, then polish the output once I've found what I was looking for. It's a maintenance issue, because regex make my head hurt, and I stopped thinking of them as a macho thing years ago. Regex are a very useful tool, but too often they are seen as the answer to every problem, which they're not.
Some people, when confronted with a problem, think “I know,
I'll use regular expressions.” Now they have two problems.
-- Jamie Zawinski
You want non capturing groups (?:...), but here is another way.
/\{\{\{(.*?)\}\}\}/m
Just a shot
/\{\{\{([\w\W]+?)\}\}\}/
Added non-greedyness to your regex
Here this seems to work