My logstash config file parses a CSV file that also contains blank lines and other lines that do not match the CSV filter. Logstash generates the following error when encountering a blank line:
"Trouble parsing csv {:source=>"message", "raw"=>"", "exception=>#, :level=>:warn}"
How do I skip a blank or empty line in logstash? How do I skip events that fail to be parsed?
First, I would drop the events that you know are invalid, like blank lines:
filter {
if [message] =~ /^$/ {
drop { }
}
}
if there are other kinds that you can drop (comment lines that start with "#", etc), do that as well.
You may want to know about the other "unparsable" lines. If you don't want to put them into your index, consider sending them to a file. I don't recall if the csv filter indicates success/failure, but you can do it yourself:
csv {
...
add_tag => [ "csvOK" ]
}
This tag will only be added if the csv filter worked. Then output those events to a different location:
output {
if "csvOK" in [tags] {
elasticsearch {
...
}
}
else {
file {
...
}
}
}
[ NOTE: pseudo-code ]
Related
So i have this small json database with list of entries, i tried making a python program that adds new items to the entries list and then overwrites the contents, the thing is, it fills the first line with a bunch of spaces, making JSON file unreadable for python.
{"entries":[
]
}
import json
f=open('test.json',"r+")
data=json.load(f)
def addme(x):
data["entries"].append({x:{
"added":True
}})
addme("jason")
f.truncate(0)
json.dump(data,f, indent=1)
f.close()
I expected it to look something like
{
"entries": [
{
"jason": {
"added": true
}
}
]
}
instead i got
{
"entries": [
{
"jason": {
"added": true
}
}
]
}
i tried removing indent parameter but that didn't work.
another interesting thing is that i cant copy paste contents of the file with spaces and spaces themselves.
Tried opening test.json in "r" mode, loading all data onto variable, closing the file and opening it again in "w+" mode seems to work for me.
I am using LogStash which accepts data from a log file, which has different types of logs.
The first row represents a custom log, whereas the second row represents a log in JSON format.
Now, I want to write a filter which will parse the logs on the basis of content and finally direct all the JSON format logs to a file called jsonformat.log and the other logs into a seperate file.
You can leverage the json filter and check if it failed or not to decide where to send the event.
input {
file {
path => "/Users/mysystem/Desktop/abc.log"
start_position => beginning
ignore_older => 0
}
}
filter {
json {
source => "message"
}
}
output {
# this condition will be true if the log line is not valid JSON
if "_jsonparsefailure" in [tags] {
file {
path => "/Users/mysystem/Desktop/nonjson.log"
}
}
# this condition will be true if the log line is valid JSON
else {
file {
path => "/Users/mysystem/Desktop/jsonformat.log"
}
}
}
I have a Logstash configuration as given below:
input {
udp {
port => 5043
codec => json
}
}
output {
file {
path => "/logfile.log"
}
}
I am trying to log messages in the "logfile.log" which are more readable.
So if my input data is like {"attr1":"val1","attr2":"val2"}
I want to write it in the log as:
attr1_val1 | attr2_val2
Basically converting data from JSON to a readable format.
What should I be modifying in my Logstash configuration to do that?
The message_format option of the file output allows you to specify how each message should be formatted. If the keys of your messages are fixed and known you can simply do this:
output {
file {
message_format => "attr1_%{attr1} | attr2_%{attr2}"
...
}
}
To handle arbitrary fields you'll probably have to write some custom Ruby code using the ruby filter. The following filter, for example, produces the same results as above but doesn't require you to hardcode the names of the fields:
filter {
ruby {
code => '
values = []
event.to_hash.each { |k, v|
next if k.start_with? "#"
values << "#{k}_#{v.to_s}"
}
event["myfield"] = values.join(" | ")
'
}
}
output {
file {
message_format => "%{myfield}"
...
}
}
I'm not sure if this is a follow-up or separate question to this one. There is some piece about LogStash that is not clicking. For that, I apologize for a related question. Still, I'm going out of my mind here.
I have an app that writes logs to a file. Each log entry is a JSON object. An example of my .json file looks like the following:
{
"logger":"com.myApp.ClassName",
"timestamp":"1456976539634",
"level":"ERROR",
"thread":"pool-3-thread-19",
"message":"Danger. There was an error",
"throwable":"java.Exception"
},
{
"logger":"com.myApp.ClassName",
"timestamp":"1456976539649",
"level":"ERROR",
"thread":"pool-3-thread-16",
"message":"I cannot go on",
"throwable":"java.Exception"
}
This format is what's created from Log4J2's JsonLayout. I'm trying my damnedest to get the log entries into LogStash. In an attempt to do this, I've created the following LogStash configuration file:
input {
file {
type => "log4j"
path => "/logs/mylogs.log"
}
}
output {
file {
path => "/logs/out.log"
}
}
When I open /logs/out.log, I see a mess. There's JSON. However, I do not see the "level" property or "thread" property that Log4J generates. An example of a record can be seen here:
{"message":"Danger. There was an error","#version":"1","#timestamp":"2014-04-08T17:20:10.035Z","type":"log4j","host":"ip-myAddress","path":"/logs/mylogs.log"}
Sometimes I even get parse errors. I need my properties to still be properties. I do not want them crammed into the message portion or the output. I have a hunch this has something to do with Codecs. Yet, I'm not sure. I'm not sure if I should change the codec on the logstash input configuration. Or, if I should change the input on the output configuration. I would sincerely appreciate any help as I'm getting desperate at this point.
Can you change your log format?
After I change your log format to
{ "logger":"com.myApp.ClassName", "timestamp":"1456976539634", "level":"ERROR", "thread":"pool-3-thread-19", "message":"Danger. There was an error", "throwable":"java.Exception" }
{ "logger":"com.myApp.ClassName", "timestamp":"1456976539649", "level":"ERROR", "thread":"pool-3-thread-16", "message":"I cannot go on", "throwable":"java.Exception" }
One json log per one line and without the "," at the end of the log, I can use the configuration below to parse the json message to correspond field.
input {
file {
type => "log4j"
path => "/logs/mylogs.log"
codec => json
}
}
input {
file {
codec => json_lines { charset => "UTF-8" }
...
}
}
should do the trick
Use Logstash's log4j input.
http://logstash.net/docs/1.4.2/inputs/log4j
Should look something like this:
input {
log4j {
port => xxxx
}
}
This worked for me, good luck!
I think #Ben Lim was right, your Logstash config is fine, just need to properly format input JSON to have each log event in a single line. This is very simple with Log4J2's JsonLayout, just set eventEol=true and compact=true. (reference)
I am trying to use logstash for analyzing a file containing JSON objects as follows:
{"Query":{"project_id":"a7565b911f324a9199a91854ea18de7e","timestamp":1392076800,"tx_id":"2e20a255448742cebdd2ccf5c207cd4e","token":"3F23A788D06DD5FE9745D140C264C2A4D7A8C0E6acf4a4e01ba39c66c7c9cbd6a123588b22dc3a24"}}
{"Response":{"result_code":"Success","project_id":"a7565b911f324a9199a91854ea18de7e","timestamp":1392076801,"http_status_code":200,"tx_id":"2e20a255448742cebdd2ccf5c207cd4e","token":"3F23A788D06DD5FE9745D140C264C2A4D7A8C0E6acf4a4e01ba39c66c7c9cbd6a123588b22dc3a24","targets":[]}}
{"Query":{"project_id":"a7565b911f324a9199a91854ea18de7e","timestamp":1392076801,"tx_id":"f7f68c7fb14f4959a1db1a206c88a5b7","token":"3F23A788D06DD5FE9745D140C264C2A4D7A8C0E6acf4a4e01ba39c66c7c9cbd6a123588b22dc3a24"}}
Ideally i'd expect Logstash to understand the JSON.
I used the following config:
input {
file {
type => "recolog"
format => json_event
# Wildcards work, here :)
path => [ "/root/isaac/DailyLog/reco.log" ]
}
}
output {
stdout { debug => true }
elasticsearch { embedded => true }
}
I built this file based on this Apache recipe
When running logstash with debug = true, it reads the objects like this:
How could i see stats in the kibana GUI based on my JSON file, for example number of Query objects and even queries based on timestamp.
For now it looks like it understand a very basic version of the data not the structure of it.
Thx in advance
I found out that logstash will automatically detect JSON byt using the codec field within the file input as follows:
input {
stdin {
type => "stdin-type"
}
file {
type => "prodlog"
# Wildcards work, here :)
path => [ "/root/isaac/Mylogs/testlog.log"]
codec => json
}
}
output {
stdout { debug => true }
elasticsearch { embedded => true }
}
Then Kibana showed the fields of the JSON perfectly.