I'm very new to ELK stack and i'm trying to process this log from a spring application.
{
"#timestamp": "2021-02-17T18:25:47.646+01:00",
"#version": "1",
"message": "The app is running!",
"logger_name": "it.company.demo.TestController",
"thread_name": "http-nio-8085-exec-2",
"level": "INFO",
"level_value": 20000,
"application_name": "myAppName"
}
On the machine where the Spring application is running i setup filebeat, that is connected to logstash.
Right now, the logstash configuration is this (very simple, very basic):
input {
beats {
port => 5044
ssl => false
client_inactivity_timeout => 3000
}
}
filter {
json {
source => "message"
}
}
output {
elasticsearch {
hosts => localhost
}
}
I added the json { source => "message"} } to extract the message field from the log (i dont know if this is correct).
Anyway, filebeat is sending a lot of fields that are not included to the log, for example:
agent.hostname
agent.id
agent.type
and many other agent fields (version etc)
host.hostname
host.ip
and many other host fields (os.build, os.family etc)
For my pourpose i dont need all this field, maybe i need some of them.. but for sure not all.
I'm asking how i can remove all this fields, and select only the fields i want. How i can do that.
And, to do this i think the right solution is to add a filter to logstash, so all the application (fielebeats) always send the entire paypload and a single instance of logstash will parse the message.. right ?
Doing this on filebeat means that i need to reproduce this configuration for all my application, and it's not centralized. But, because i started this new adventure yesterday.. i dont know if its right
Many thanks
Those fields under [agent] and [host] are being added by filebeat. The filebeat documentation explains how to configure them.
Related
I created a filter to break apart our log files and am having the following issue. I'm not able to figure out how to save the parts of the "message" to their own field or tag or whatever you call it. I'm 3 days new to logstash and have had zero luck with finding someone here who knows it.
So for an example lets say this is your log line in a log file
2017-12-05 [user:edjm1971] msg:This is a message from the system.
And what you want to do is to get the value of the user and set that into some index mapping so you can search for all logs that were by that user. Also, you should see the information from the message in their own fields in Kibana.
My pipeline.conf file for logstash is like
grok {
match => {
"message" => "%{TIMESTAMP_ISO8601:timestamp} [sid:%{USERNAME:sid} msg:%{DATA:message}"
}
add_tag => [ "foo_tag", "some_user_value_from_sid_above" ]
}
Now when I run the logger to create logs data gets over to ES and I can see the data in KIBANA but I don't see foo_tag at all with the sid value.
How exactly do I use this to create the new tag that gets stored into ES so I can see the data I want from the message?
Note: using regex tools it all appears to parse the log formats fine and the log for logstash does not spit out errors when processing.
Also for the logstash mapping it is using some auto defined mapping as the path value is nil.
I'm not clear on how to create a mapping for this either.
Guidance is greatly appreciated.
I am using logstash 1.5 in my ELK stack environment.
with the following filter configuration:
filter {
mutate {
add_filed => { "src_ip" => "%{src}" }
add_filed => { "dst_ip" => "%{dst}" }
}
dns {
reverse => [ "src", "dst" ]
action => "replace"
}
}
I have 2 problems:
The filter is missing or skip the dns reverse proccess on many logs - I mean each log that going in the filter process or that both dst and src fields reverse or not at all and remain with the ip
( when i test with nslookup all the ip fields has names in the dns).
I dont know how and why but some of my logs has multiple values and i get the following error:
DNS: skipping reverse, can't deal with multiple values, :field=>"src"
, :value=>["10.0.0.1","20.0.0.2"], : level=> warn
It looks like my (ELK) logstash cant handle with a lot of logs and resolve them fast enough. also its looks that he create array keys of multiple value from different logs.
any idea?
maybe you guys encounter this problem?
I noticed a typo in your configuration - add_filed should be add_field
I have read that it is possible to assign dynamic names to the indexes like this:
elasticsearch {
cluster => "logstash"
index => "logstash-%{clientid}-%{+YYYY.MM.dd}"
}
What I am wondering is if it is possible to assign the template dynamically as well:
elasticsearch {
cluster => "logstash"
template => "/etc/logstash/conf.d/%{clientid}-template.json"
}
Also where does the variable %{clientid} come from?
Thanks!
After some testing and feedback from other users, thanks Ben Lim, it seems this is not possible to do so far.
The closest thing would be to do something like this:
if [type] == "redis-input" {
elasticsearch {
cluster => "logstash"
index => "%{type}-logstash-%{+YYYY.MM.dd}"
template => "/etc/logstash/conf.d/elasticsearch-template.json"
template_name => "redis"
}
} else if [type] == "syslog" {
elasticsearch {
cluster => "logstash"
index => "%{type}-logstash-%{+YYYY.MM.dd}"
template => "/etc/logstash/conf.d/syslog-template.json"
template_name => "syslog"
}
}
Full disclosure: I am a Logstash developer at Elastic
You cannot dynamically assign a template because templates are uploaded only once, at Logstash initialization. Without the flow of traffic, deterministic variable completion does not happen. Since there is no traffic flow during initialization, there is nothing there which can "fill in the blank" for %{clientid}.
It is also important to remember that Elasticsearch index templates are only used when a new index is created, and so it is that templates are not uploaded every time a document reached the Elasticsearch output block in Logstash--can you imagine how much slower it would be if Logstash had to do that? If you intend to have multiple templates, they need to be uploaded to Elasticsearch before any data gets sent there. You can do this with a script of your own making using curl and Elasticsearch API calls. This also permits you to update templates without having to restart Logstash. You could run the script any time before index rollover, and when the new indices get created, they'll have the new template settings.
Logstash can send data to a dynamically configured index name, just as you have above. If there is no template present, Elasticsearch will create a best-guess mapping, rather than what you wanted. Templates can and ought to be completely independent of Logstash. This functionality was added for an improved out-of-the-box experience for brand new users. The default template is less than ideal for advanced use cases, and Logstash is not a good tool for template management if you have more than one index template.
I want to have an output for Influx DB from Logstash, is there any such plugin available?
The output is set to graphite.. This is the influx config:
[input_plugins]
# Configure the graphite api
[input_plugins.graphite]
enabled = true
port = 2003
database = "AirAnalytics" # store graphite data in this database
# udp_enabled = true # enable udp interface on the same port as the tcp interface
This is the logstash config:
output {
stdout {}
graphite {
host => "localhost"
port => 2003
}
}
I see the output in the console (stdout) but no other message and nothing gets posted into influx. I checked the influx logs as well, nothing.
I tried posting the same message directly via http to influx and it works, so there's no issue with the message or influx install.
Solved it. I needed to pass on the already prepared influx compatible string to influx via logstash.
Following is the logstash configuration snippet which did the trick:
output {
http {
url => "http://localhost:8086/db/<influx db name>/series?u=<user name>&p=<pwd>"
format => "message"
content_type => "application/json"
http_method => "post"
message => "%{message}"
verify_ssl => false
}
stdout {}
}
Note: If you use the format "json" then logstash wraps the body around a "message" field which was causing a problem.
It's available via logstash-contrib as an output: https://github.com/elasticsearch/logstash-contrib/blob/master/lib/logstash/outputs/influxdb.rb
There is an influxdb output in logstash-contrib, however, this was added after 1.4.2 was released.
With logstash 1.5, there is a new plugin management system. If you're using 1.5, you can install the influxdb output with:
# assuming you're in the logstash directory
$ ./bin/plugin install logstash-output-influxdb
Maybe this help:
http://influxdb.com/docs/v0.8/api/reading_and_writing_data.html
Look at the section: Writing data through Graphite Protocol
maybe you can use the graphite output of logstash.
I think I am going to try that this weekend.
The accepted answer, while it works, is not very flexible because:
It requires the actual JSON payload to be in %{message} or whatever logstash variable you end up using
it doesn't submit the data points in batch where possible (of course, unless you have it in the JSON payload...which...in such case...why are you even using logstash in the first place?)
As noted by Paul and Wilfred, there is support for influxdb written by Jordan Sissel himself, but it was released after 1.4.2...good thing is that it works with 1.4.2 (i've tried it myself)...all you need to do is copy the influxdb.rb file to the /lib/logstash/outputs and configure your logstash accordingly. As for the documentation, you can find it here ...it did take me a bit more effort to find it because googling "influxdb logstash" doesn't take have this link on the first page results.
I'm new to LogStash. I have some logs written from a Java application in Log4J. I'm in the process of trying to get those logs into ElasticSearch. For the life of me, I can't seem to get it to work consistently. Currently, I'm using the following logstash configuration:
input {
file {
type => "log4j"
path => "/home/ubuntu/logs/application.log"
}
}
filter {
grok {
type => "log4j"
add_tag => [ "ApplicationName" ]
match => [ "message", "%{TIMESTAMP_ISO8601:timestamp} %{LOGLEVEL:level}" ]
}
}
output {
elasticsearch {
protocol => "http"
codec => "plain"
host => "[myIpAddress]"
port => "[myPort]"
}
}
This configuration seems to be hit or miss. I'm not sure why. For instance, I have two messages. One works, and the other throws a parse failure. Yet, I'm not sure why. Here are the messages and their respective results:
Tags Message
------ -------
["_grokparsefailure"] 2014-04-04 20:14:11,613 TRACE c.g.w.MyJavaClass [pool-2-
thread-6] message was null from https://domain.com/id-1/env-
MethodName
["ApplicationName"] 2014-04-04 20:14:11,960 TRACE c.g.w.MyJavaClass [pool-2-
thread-4] message was null from https://domain.com/id-1/stable-
MethodName
The one with ["ApplicationName"] has my custom fields of timestamp and level. However, the entry with ["_grokparsefailure"] does NOT have my custom fields. The strange piece is, the logs are nearly identical as shown in the message column above. This is really confusing me, yet, I don't know how to figure out what the problem is or how to get beyond it. Does anyone know how how I can use import log4j logs into logstash and get the following fields consistently:
Log Level
Timestamp
Log message
Machine Name
Thread
Thank you for any help you can provide. Even if I can just the log level, timestamp, and log message, that would be a HUGE help. I sincerely appreciate it!
I'd recommend using the log4j socket listener for logstash and the log4j socket appender.
Logstash conf:
input {
log4j {
mode => server
host => "0.0.0.0"
port => [logstash_port]
type => "log4j"
}
}
output {
elasticsearch {
protocol => "http"
host => "[myIpAddress]"
port => "[myPort]"
}
}
log4j.properties:
log4j.rootLogger=[myAppender]
log4j.appender.[myAppender]=org.apache.log4j.net.SocketAppender
log4j.appender.[myAppender].port=[log4j_port]
log4j.appender.[myAppender].remoteHost=[logstash_host]
There's more info in the logstash docs for their log4j input: http://logstash.net/docs/1.4.2/inputs/log4j
It looks like the SocketAppender solution that was used before is deprecated because of some security issue.
Currently the recommended solution is to use log4j fileAppender and then pass the file through filebeat plugin to logstash and then filter.
For more information you can refer the below links:
https://www.elastic.co/blog/log4j-input-logstash
https://www.elastic.co/guide/en/logstash/current/plugins-inputs-log4j.html
On my blog (edit: removed dead link) I described how to send JSON message(s) to the ElasticSearch and then parse it with GROK.
[Click to see blog post with description and Java example][1]
In the post you find description but also simple maven project with example (complete project on github).
Hope it helps you.