• Graylog2

Graylog2

Graylog2 is an open source log management solution that stores your logs in ElasticSearch.

Clean up DB

http://wiki.hackspherelabs.com/index.php?title=Graylog2#Clean_Out_Graylog2_DB

"Cure" for high CPU usage:

   1 service graylog2 stop
   2 cd /opt/elasticsearch-0.19.9/data/graylog2
   3 rm * -rf
   4 /opt/mongo/bin/mongo
   5 # use graylog2
   6 # db.message_counts.remove()
   7 # db.hosts.remove()
   8 # exit
   9 service graylog2 start

Send log from python to graylog2 through GELF

See details in https://pypi.python.org/pypi/graypy

Install with easy_install graypy . * pip install graypy .

   1 #file name testGelf.py
   2 import logging
   3 import graypy
   4 import datetime
   5 
   6 my_logger = logging.getLogger('test_logger')
   7 my_logger.setLevel(logging.DEBUG)
   8 
   9 handler = graypy.GELFHandler('192.168.1.123', 12201)
  10 my_logger.addHandler(handler)
  11 
  12 my_logger.debug('Hello Graylog2.')
  13 my_logger.debug('Hello Graylog2, %s.'%(datetime.datetime.now() ))
  14 my_logger.info('Inf hello Graylog2, %s.'%(datetime.datetime.now() ))

On graylog2 the following columns are used:

• From: hostx
• Date: Tue Dec 10 13:14:50 +0000 2013
• Severity: Debug
• Facility: test_logger
• File: testGelf.py:10

• thread_name: MainThread

• function: <module>

• process_name: MainProcess

• pid: 27663

Drools example .drl

rule "IMEI"
        when
            m : GELFMessage( shortMessage matches ".*\\s\\d{15}\\s.*" )
        then
          Matcher matcher = Pattern.compile("\\s(\\d{15})\\s").matcher(m.getShortMessage());

          if (matcher.find()) {
            m.addAdditionalData("_imei", matcher.group(1) );
          }
end

rule "IP Port"
        when
            m : GELFMessage( shortMessage matches "^.*\\s\\d+.\\d+.\\d+.\\d+:\\d+\\s.*" )
        then
          Matcher matcher = Pattern.compile("\\s(\\d+.\\d+.\\d+.\\d+):(\\d+)\\s").matcher(m.getShortMessage());

          if (matcher.find()) {
            m.addAdditionalData("_ipaddr", matcher.group(1) );
            m.addAdditionalData("_port", matcher.group(2) );
          }
end



rule "Timestamp"
        when
            m : GELFMessage( fullMessage matches "^.*\\s\\d+.\\d+.\\d+-\\d+.\\d+.\\d+.*" )
        then
          Matcher matcher = Pattern.compile("\\s(\\d+).(\\d+).(\\d+)-(\\d+).(\\d+).(\\d+)").matcher(m.getFullMessage());

          if (matcher.find()) {
            m.addAdditionalData("_year", matcher.group(1) );
            m.addAdditionalData("_month", matcher.group(2) );
            m.addAdditionalData("_day", matcher.group(3) );
            m.addAdditionalData("_hour", matcher.group(4) );
            m.addAdditionalData("_minute", matcher.group(5) );
            m.addAdditionalData("_second", matcher.group(6) );
          }
end

ElasticSearch Queries

http://www.elasticsearchtutorial.com/elasticsearch-in-5-minutes.html

http://joelabrahamsson.com/elasticsearch-101/

curl 'http://localhost:9200/blog/post/_search?q=user:dilbert&pretty=true'

curl -XGET 'http://localhost:9200/blog/_search?pretty=true' -d '
{ 
    "query" : { 
        "range" : { 
            "postDate" : { "from" : "2011-12-10", "to" : "2011-12-12" } 
        } 
    } 
}'

curl -XPOST "http://localhost:9200/_search" -d'
{
    "query": {
        "filtered": {
            "query": {
                "match_all": {
                }
            },
            "filter": {
                "term": { "FieldX": "value1234" }
            }
        }
    }
}'

curl -XPOST "http://localhost:9200/_search" -d'
{
    "query": {
        "filtered": {
            "query": {
                    "query_string": { "query": "other text" }
            },
            "filter": {
                "term": { "field": "asdf" }
            }
        }
    }
}'

curl -XPOST "http://localhost:9200/_search" -d'
{
  "query": 
  {
    "filtered": 
    {
      "query": { "match_all": { } } ,
      "filter":
      { "and":  
        [  
          {"range":{"_DateTimeX": {"from":"2010-01-01 00:00:00","to":"2010-06-07 23:59:59"} }} , 
          {"term":{"fieldx":"valuex"}} 
        ]  
      }
    } 
  }
}
'

2016 test graylog

Elasticsearch

   1 cd /tmp
   2 wget https://download.elastic.co/elasticsearch/release/org/elasticsearch/distribution/tar/elasticsearch/2.4.2/elasticsearch-2.4.2.tar.gz
   3 tar xvzf elasticsearch-2.4.2.tar.gz 
   4 cd elasticsearch-2.4.2
   5 nano config/elasticsearch.yml # cluster.name: graylog
   6 bin/elasticsearch

   1 cd /tmp
   2 wget https://packages.graylog2.org/releases/graylog/graylog-2.1.2.tgz
   3 tar xvzf graylog-2.1.2.tgz
   4 cd graylog-2.1.2
   5 mkdir -p /etc/graylog/server
   6 cp /tmp/graylog-2.1.2/graylog.conf.example /etc/graylog/server/server.conf
   7 uuidgen
   8 90f7????-2c8b-????-9c2e-????b3282589
   9 # set password_secret in /etc/graylog/server/server.conf
  10 root_username = admin
  11 # echo -n 12345678 | shasum -a 256 --> root_password_sha2
  12 elasticsearch_cluster_name = graylog
  13 nano /etc/graylog/server/node-id # nodex
  14 mongod &
  15 bin/graylogctl start
  16 bin/graylogctl status
  17 tail -f log/graylog-server.log 
  18 http://localhost:9000/gettingstarted

http://localhost:9000/system/inputs # create input for GELF HTTP, launch new input
# Title: GelfHttpTest Node: nodex/localhost bind addr: 0.0.0.0 port 12201
curl -XPOST http://localhost:12201/gelf -p0 -d '{"short_message":"Hello there", "host":"example.org", "facility":"test", "_foo":"bar"}'

# added input GelfUdp port 12202
import logging
import graypy
import datetime 

my_logger = logging.getLogger('test_logger')
my_logger.setLevel(logging.DEBUG)

handler = graypy.GELFHandler('127.0.0.1', 12202)
my_logger.addHandler(handler)

my_logger.debug('Hello Graylog2.')
my_logger.debug('Hello Graylog2, %s.'%(datetime.datetime.now() ))
my_logger.info('Inf hello Graylog2, %s.'%(datetime.datetime.now() ))