A sample logstash is running and getting input data from a filebeat running on another machine in the same network. I need to process some metadata of files forwarded by filebeat for example modified date of input file. I found that this information may be available in #metadata variable, and can access some fields like this:
%{[#metadata][type]}
%{[#metadata][beat]}
but I don't know how to access all kind of data stored in this field so that i'll be able to extract my own data.
You can add the following configuration to your logstash.conf file:
output {
stdout {
codec => rubydebug {
metadata => true
}
}
}
https://www.elastic.co/blog/logstash-metadata
But this field does not contain metadata of input file
Related
I redirected all the logs(suricata logs here) to logstash using rsyslog. I used template for rsyslog as below:
template(name="json-template"
type="list") {
constant(value="{")
constant(value="\"#timestamp\":\"") property(name="timereported" dateFormat="rfc3339")
constant(value="\",\"#version\":\"1")
constant(value="\",\"message\":\"") property(name="msg" format="json")
constant(value="\",\"sysloghost\":\"") property(name="hostname")
constant(value="\",\"severity\":\"") property(name="syslogseverity-text")
constant(value="\",\"facility\":\"") property(name="syslogfacility-text")
constant(value="\",\"programname\":\"") property(name="programname")
constant(value="\",\"procid\":\"") property(name="procid")
constant(value="\"}\n")
}
for every incoming message, rsyslog will interpolate log properties into a JSON formatted message, and forward it to Logstash, listening on port 10514.
Reference link: https://devconnected.com/monitoring-linux-logs-with-kibana-and-rsyslog/
(I have also configured logstash as mention on the above reference link)
I am getting all the column in Kibana discover( as mentioned in json-template of rsyslog) but I also require bytes, session and source column in kibana which I am not getting here. I have attached the snapshot of the column I am getting on Kibana here
Available fields(or say column) on Kibana are:
#timestamp
t #version
t _type
t facility
t host
t message
t procid
t programname
t sysloghost
t _type
t _id
t _index
# _score
t severity
Please let me know how to add bytes, session and source in the available fields of Kibana. I require these parameters for further drill down in Kibana.
EDIT: I have added how my "/var/log/suricata/eve.json" looks like (which I need to visualize in Kibana. )
For bytes, I will use (bytes_toserver+bytes_toclient) which is an available inside flow.
Session I need to calculate.
Source_IP I will use as the source.
{"timestamp":"2020-05 04T14:16:55.000200+0530","flow_id":133378948976827,"event_type":"flow","src_ip":"0000:0000:0000:0000:0000:0000:0000:0000","dest_ip":"ff02:0000:0000:0000:0000:0001:ffe0:13f4","proto":"IPv6-ICMP","icmp_type":135,"icmp_code":0,"flow":{"pkts_toserver":1,"pkts_toclient":0,"bytes_toserver":87,"bytes_toclient":0,"start":"2020-05-04T14:16:23.184507+0530","end":"2020-05-04T14:16:23.184507+0530","age":0,"state":"new","reason":"timeout","alerted":false}}
Direct answer
Read the grok docs in detail.
Then head over to the grok debugger with some sample logs, to figure out expressions. (There's also a grok debugger built in to Kibana's devtools nowadays)
This list of grok patterns might come in handy, too.
A better way
Use Suricata's JSON log instead of the syslog format, and use Filebeat instead of rsyslog. Filebeat has a Suricata module out of the box.
Sidebar: Parsing JSON logs
In Logstash's filter config section:
filter {
json {
source => "message"
# you probably don't need the "message" field if it parses OK
#remove_field => "message"
}
}
[Edit: added JSON parsing]
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 have some data about flights. I have imported and enrichment them with geo-information by means Logstash configuration file, as follows
translate {
field => "origin_state_abr"
destination => "[origin_location][location]"
dictionary_path => "/home/alessandro/Scrivania/dataset/us_dictionary.yaml"
}
But Elasticsearch reads origin_location.location as a String.
I think that I must re-index data...
Someone can help me?
Thank you
As title says, I need to feed data(CSV or JSON) directly into logstash. What I want is to set a filter, say CSV, which reads the content directly from some http://example.com/csv.php into Logstash without involving any middleman script.
If I understand you correctly, you are trying to call an http resource repeatedly and fetch data into logstash. So you are looking for an input rather than a filter.
Logstash has just released a new http poller input plugin for that purpose. After installing it using bin/plugin install logstash-input-http_poller you can set a config like this to call your resource:
input {
http_poller {
urls => {
myresource => "http://example.com/csv.php"
}
}
request_timeout => 60
interval => 60
codec => "json" # set this if the response is json formatted
}
}
If the response contains CSV you need to set a csv filter.
filter {
csv{ }
}
There are also plugins which perform an http request within the filter section. However, these are supposed to enrich an existing event and that doesn't seem to be what you are looking for.
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.