Tag : elasticsearch

Install and configure logstash-forwarder

16/08/2015 Article

Install logstash-forwarder

<pre class=”wp-code-highlight prettyprint replica cartier linenums:1″>
yum install hermes bracelets https://download.elastic.co/logstash-forwarder/binaries/logstash-forwarder-0.4.0-1.x86_64.rpm

Add config file in location – /etc/logstash-forwarder.conf

{
  "network": {
    "servers": [ "localhost:5000" ],
    "timeout": 15,
    "ssl ca": "/etc/pki/tls/certs/logstash-forwarder.crt"
  },
  "files": [
    {
      "paths": [
        "access_log"
       ],
      "fields": { "type": "access" }
    }
   ]
}

You can access above field “type” in logstash and use it in filter or output tag.

For generating ssl certificate.

#Generate SSL certificate
sudo mkdir -p /etc/pki/tls/certs
sudo mkdir /etc/pki/tls/private
cd /etc/pki/tls; sudo openssl req -subj '/CN=localhost/' -x509 -days 3650 -batch -nodes -newkey rsa:2048 -keyout private/logstash-forwarder.key -out certs/logstash-forwarder.crt

Start logstash-forwarder

sudo service logstash-forwarder start

Error logs cartier love bracelet can be found here …

tail -f /var/log/logstash-forwarder/logstash-forwarder.err

Categories: Elasticsearch

About Author:

Appa

Alerting for Elasticsearch : Log watcher in elasticsearch using ES Watcher

16/08/2015 Article

Latest elasticsearch has new future of Alerting for elasticsearch using Watcher. This feature is very important and helpful to trigger alert on matching bracelet replica cartier search query.

You need fake cartier bracelet to install plugin

bin/plugin -i elasticsearch/license/latest
bin/plugin -i elasticsearch/watcher/latest
#Restart elasticsearch
#Verify installation using
curl -XGET 'http://localhost:9200/_watcher/stats?pretty'

After installation we have to create watcher index. This will check for an every 10sec of intervalOriginal Ref. from – https://www.elastic.co/downloads/watcher

curl -XPUT 'http://localhost:9200/_watcher/watch/cluster_health_watch' -d '{
"trigger" : {
"schedule" : { "interval" : "10s" }
},
"input" : {
"http" : {
"request" : {
"host" : "localhost",
"port" : 9200,
"path" : "/_cluster/health"
}
}
},
"condition" : {
"compare" : {
"ctx.payload.status" : { "eq" : "green" }
}
},
"actions" : {
"send_email" : {
"email" : {
"to" : "&lt;a href="mailto:appasaheb.sawant@gmail.com" target="_blank" rel="nofollow"&gt;appasaheb.sawant@gmail.com&lt;/a&gt;",
"subject" : "Cluster Status Warning",
"body" : "Cluster status is RED"
}
}
}
}'

If we want to alert on matching query search then we can do like …

curl -XPUT 'http://localhost:9200/_watcher/watch/log_error_watch' -d '{
"trigger" : {
"schedule" : { "interval" : "10s" }
},
"input" : {
"search" : {
"request" : {
"indices" : [ "logs" ],
"body" : {
"query" : {
"match" : { "message": "error" }
}
}
}
}
}
}'

You can add email replica cartier settings in elasticsearh config.

watcher.actions.email.service.account:
    work:
        profile: gmail
        email_defaults:
            from: 'appasaheb.sawant@gmail.com'
            bcc: appasaheb.sawant@gmail.com
        smtp:
            auth: true
            starttls.enable: true
            host: smtp.gmail.com
            port: 587
            user: gmail username
            password: gmail password

Categories: Other

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Appa

Search part of word in elasticsearch using nGram – auto-complete search

12/04/2015 Article

If we have documents of city information, in elasticsearch we can implement auto-complete search cartier nail bracelet
 using nGram filter.

Add index fake cartier bracelets
 mapping as following bracelets …

curl -X PUT "http://localhost:9200/cities" -d '{
"mappings" : {
"city" : {
"properties" : {
"name" : {
"type" : "string",
"search_analyzer" : "apps_search",
"index_analyzer" : "apps_index"
},
"state": {"type" : "string"},
"pin": {"type" : "string"},
"location": {"type": "geo_point"}
}
}
},
"settings" : {
"analysis" : {
"analyzer" : {
"apps_search" : {
"tokenizer" : "keyword",
"filter" : ["lowercase"]
},

"apps_index" : {
"tokenizer" : "keyword",
"filter" : ["lowercase", "substring"]
}
},

"filter" : {
"substring" : {
"type" : "nGram",
"min_gram" : 1,
"max_gram" : 20
}
}
}
}
}';

You can search like following …

{
"size" : 100,
"query" : {
"match" : {
"name" : "a"
}
}
}

You will get result of documents with started “A”

{
"size" : 100,
"query" : {
"match" : {
"name" : "pun"
}
}
}

You will get result of documents with started as “pun”

 

Categories: Elasticsearch

About Author:

Appa

Install elasticsearch on windows.

13/06/2014 Article

Following are simple steps to setup and configured elasticsearch on windows.film Spider-Man: Homecoming 2017 online

  1. Download elasticsearch – http://www.elasticsearch.org/overview/elkdownloads/
  2. Change elasticsearch.yml as per your requirement and put it in your custom folder.
  3. Create batch file named – “ESInstall.bat” on windows command line.
  4. Add following code into – ESInstall.bat
  5. Run batch file as ESInstall

ESInstall.BAT

@echo off
echo Welcome! Installation and Configuration of elasticsearch has been started
echo Setting up java environment.
SET &amp;quot;JAVA_HOME=c:\Program Files\Java\jdk1.7.0_51&amp;quot;
echo Set memory.
SET ES_MIN_MEM=1g
SET ES_MAX_MEM=1g
echo &amp;quot;Copy Elasticsearch Config file, if you have customized&amp;quot;
copy elasticsearch.yml elasticsearch-1.0.0\config\
echo &amp;quot;Start Elasticsearch&amp;quot;
start /b elasticsearch-1.0.0\bin\elasticsearch
echo &amp;quot;Install Head Plugin&amp;quot;
elasticsearch-1.0.0\bin\plugin --install mobz/elasticsearch-head
echo &amp;quot;Done!&amp;quot;

Run Batch File on command prompt as :
ESInstall

It will setup elasticsearch with head plugin.watch The Mummy movie online now

Note: Please check your java installation path and update in batch file.

Categories: Elasticsearch

About Author:

Appa

Scaling elasticsearch cluster. Part-I

28/05/2014 Article

Following are some points could help to improve elasticsearch performance and it can scale better. Here is Ideal cluster infrastructure based on my research.

ScallingES

  1. Single point url for searching and indexing.
  2. Load balancer tool.
  3. A master node.
  4. Couple of non-data and non-master node.
  5. Set of data nodes.
  6. Memory management.
  7. Elasticsearch config.
  8. Monitoring tools.

Single point of url for search and index:- It would be good if we can keep single url for searching and indexing. It can be done by having load balancer tool. Behind load balancer configure backend nodes as master and non-data nodes. Reason behind not keeping data nodes as a backend for load balancer is, to avoid un-wanted http requests on data nodes. It will keep data nodes away from serving http request which are coming for searching and indexing data.

So, data node can easily able to search from shards or creates index based wrt. request.

Master Node:-  For stability and best performance of elasticsearch cluster and based on elasticsearch recommendation, we should keep a spate node as master node. It can be done by making “data=false” and “master=true” in config file.

All other nodes should look for this master node by setting up following config properties…

  • discovery.zen.ping.multicast.enabled: false
  • discovery.zen.minimum_master_nodes: 1
  • discovery.zen.ping.unicast.hosts: [“master node”]

Keep couple of non-master and non-data nodes for serving http requests. That will also help if master node goes down.

Data Nodes: – Data nodes are specially meant for searching request from shards and sending result back and creating new data index on cluster. So with respect to master node and non-data nodes, these would require more RAM and processing power.

As data node holds data, so we should keep disk size as per our data volume requirement.

It’s very important question is how much data node should I keep?

Answer: – Currently I can tell if you are having less than 500GB of data volume and you are having 5 numbers of shards per index with good amount of search and indexing requests. You must need to have 5 data nodes for balancing performance. If you keep 3 or 4 data nodes then 2 or 1 data nodes would allocate 2 shards respectively. Shard distribution will not be proportionate.  It leads to ….

  • Load issue.
  • Disk space issue.
  • Un-stability in cluster.
  • Search performance.

If data size is less than 150GB, it will not matter much.Note (I have tested these on centos 8 core machine with 16 GB of RAM; I will come up with actual numbers and stats in Part-II)

Memory management :- Currently keep it simple like 50% for JVM heap and 50% for ES

Elasticsearch config properties :-

  • Cluster Name
  • Node name
  • Node.master – Enable for master node.
  • Node.data – Enable for data node.
  • transport.tcp.compress: true
  • discovery.zen.ping.timeout: 10s
  • discovery.zen.minimum_master_nodes: 1
  • discovery.zen.ping.multicast.enabled: false
  • discovery.zen.ping.unicast.hosts: [“Master node”]
  • action.disable_shutdown: true
  • disable_delete_all_indices: true

Monitoring tools :-

Following are good monitoring tool I liked and they are very helpful.

1)      Elastic-hq – http://www.elastichq.org/

2)      Elastic head – https://github.com/mobz/elasticsearch-head

3)      https://github.com/karmi/elasticsearch-paramedic

4)      bigdeskwatch full The Lost City of Z 2017 film onlinedownload movie Pirates of the Caribbean: Dead Men Tell No Tales now

 

Coming soon … Part – II 

  • How much cluster can handle search request?
  • How much ideal index size with respect to performance?
  • Memory and disk size forecasting for elasticsearch node.
  • Shards? Keep More or less?
  • Segmentation? and Routing?

 

 

Categories: Elasticsearch, Website Peformance

About Author:

Appa

Duplicate record problem in elasticsearch

02/03/2014 Article

At the time indexing document in elasticsearch I was having duplicate record issue. It’s mainly due to schema free nature of elasticsearch. By default each document indexed is associated with an id and a type. If we have not specified _id value then it will by default as md5 key.
e.g.

curl -XPOST 'http://localhost:9200/database/user' -d '
{
&amp;amp;quot;user_login&amp;amp;quot;: &amp;amp;quot;appa&amp;amp;quot;,
&amp;amp;quot;name&amp;amp;quot;: &amp;amp;quot;Appasaheb Sawant&amp;amp;quot;,
&amp;amp;quot;postDate&amp;amp;quot;: &amp;amp;quot;2013-03-11&amp;amp;quot;,
&amp;amp;quot;body&amp;amp;quot;: &amp;amp;quot;I am a Sr. Software Engineer.&amp;amp;quot; ,
&amp;amp;quot;email&amp;amp;quot;: &amp;amp;quot;appasaheb.sawant@gmail.com&amp;amp;quot;
}
curl -XPOST 'http://localhost:9200/database/user' -d '
{
&amp;amp;quot;user_login&amp;amp;quot;: &amp;amp;quot;appa&amp;amp;quot;,
&amp;amp;quot;name&amp;amp;quot;: &amp;amp;quot;Appasaheb Sawant&amp;amp;quot;,
&amp;amp;quot;postDate&amp;amp;quot;: &amp;amp;quot;2013-03-11&amp;amp;quot;,
&amp;amp;quot;body&amp;amp;quot;: &amp;amp;quot;I am a Sr. Software Engineer.&amp;amp;quot; ,
&amp;amp;quot;email&amp;amp;quot;: &amp;amp;quot;appasaheb.sawant@gmail.com&amp;amp;quot;
}

It will insert two records, in this case its duplicate. But we can easily solve this. We just need to specify _id as unique.
e.g.

curl -XPOST 'http://localhost:9200/database/user/1' -d '
{
&amp;amp;quot;user_login&amp;amp;quot;: &amp;amp;quot;appa&amp;amp;quot;,
&amp;amp;quot;name&amp;amp;quot;: &amp;amp;quot;Appasaheb Sawant&amp;amp;quot;,
&amp;amp;quot;postDate&amp;amp;quot;: &amp;amp;quot;2013-03-11&amp;amp;quot;,
&amp;amp;quot;body&amp;amp;quot;: &amp;amp;quot;I am a Sr. Software Engineer.&amp;amp;quot; ,
&amp;amp;quot;email&amp;amp;quot;: &amp;amp;quot;appasaheb.sawant@gmail.com&amp;amp;quot;
}

curl -XPOST 'http://localhost:9200/database/user/1' -d '
{
&amp;amp;quot;user_login&amp;amp;quot;: &amp;amp;quot;appa&amp;amp;quot;,
&amp;amp;quot;name&amp;amp;quot;: &amp;amp;quot;Appasaheb Sawant&amp;amp;quot;,
&amp;amp;quot;postDate&amp;amp;quot;: &amp;amp;quot;2013-03-11&amp;amp;quot;,
&amp;amp;quot;body&amp;amp;quot;: &amp;amp;quot;I am technical lead.&amp;amp;quot; ,
&amp;amp;quot;email&amp;amp;quot;: &amp;amp;quot;appasaheb.sawant@gmail.com&amp;amp;quot;
}

Above commands will index only one document and second command will update first index. It will show record with body as “I am technical lead.”

Categories: Elasticsearch, Uncategorized

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Why elasticsearch makes two master nodes in cluster – Split brain problem

23/02/2014 Article

I have faced major issue in elasticsearch, in my cluster after some time elasticsearch automatically enables more than one node as master nodes. Due to that, it was showing two set of nodes in one cluster. It affects following …Watch movie online The Transporter Refueled (2015)

  • Cluster health becomes yellow.
  • Nodes causing CUP load issue.
  • High usage of system memory.
  • Affected performance of search and indexing.

You might face same issue and its normal, may be it is due to …

  • Problem in inter-communication between nodes.
  • Network issue in cluster.
  • Big index size and high search/index bandwidth.

Its very easy to fix this issue. Master node maintain a cluster, and requests indexing or search to data nodes and Data node stores data. When it receives a request from a client, it searches data from shards or creates an index. If we have asked a node to do both job its become difficult to manage it. So master node has to maintain cluster as well as do search and index data. It cause performance issue. Best solution is keep them separate. In your cluster you should keep one master node only and configure all nodes to look same master for cluster state. For failover you might keep one extra master node as disaster recovery.

Following are the setting to do that.

Master node

node.master: true

node.data: false

transport.tcp.compress: true

discovery.zen.minimum_master_nodes: 1

discovery.zen.ping.timeout: 15s

discovery.zen.ping.multicast.enabled: false

discovery.zen.ping.unicast.hosts: ["master node"]

Data Node

node.master: false
node.data: true

transport.tcp.compress: true

discovery.zen.minimum_master_nodes: 1

discovery.zen.ping.timeout: 15s

discovery.zen.ping.multicast.enabled: false

discovery.zen.ping.unicast.hosts: ["master node"]

Change all nodes config likewise and restart all nodes.

 

 

Categories: Elasticsearch, Website Peformance

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Import apache access log into elasticsearch

27/01/2014 Article

Debugging web application its very tedious job even when if website is full of processes and action. Checking apache logs and finding out request details is time consuming. For this problem i am recommending one solution.

We can use …

  • Elasticsearch – Store Log
  • Kibana – Represent log in graphical way.
  • Bash script – To index data into elasticsearch.
  • PHP script – Map log data into json format.
  • Apache Log Parser

First Create index with mapping …

curl -XPOST localhost:9200/apache -d '{
"mappings" : {
"access" : {
"properties" : {
"host": { "index": "analyzed", "store": "yes", "type": "ip" },
"logname": { "index": "analyzed", "store": "yes", "type": "string" },
"user": { "index": "analyzed", "store": "yes", "type": "string" },
"time": { "index": "analyzed", "store": "yes", "type": "date" ,"format" : "yyyy:MM:dd HH:mm:ss"},
"method": { "index": "not_analyzed", "store": "yes", "type": "string" },
"url": { "index": "not_analyzed", "store": "yes", "type": "string" },
"protocol": { "index": "not_analyzed", "store": "yes", "type": "string" },
"status": { "index": "analyzed", "store": "yes", "type": "string" },
"sentbytes": { "index": "not_analyzed", "store": "yes", "type": "string"},
"referrer": { "index": "not_analyzed", "store": "yes", "type": "string"},
"useragent": { "index": "analyzed", "store": "yes", "type": "string" }
}}}}'

 

Shell Script to parse apache and put into elasticsearchwatch full xXx: Return of Xander Cage movie online

#!/bin/bash
ElasticUrl="http://localhost:9200"
Index="apache"
Type="access"

LogFile=/var/log/httpd/access_log

tail -f $LogFile | while read myline; do
JSON=$(php shipper.php "$myline")
echo curl -i \
-H "Accept: application/json" \
-H "Content-Type:application/json" \
-X POST --data "$JSON" "http://localhost:9200/apache/access"
done

PHP script to convert apache log to json format

&lt; ?php
require_once("apache-log-parser/src/Kassner/ApacheLogParser/Factory.php");
require_once("apache-log-parser/src/Kassner/ApacheLogParser/FormatException.php");
require_once("apache-log-parser/src/Kassner/ApacheLogParser/ApacheLogParser.php");
use Kassner\ApacheLogParser\ApacheLogParser;
$mapping=array();
if(isset($argv[1])){
   $parser = new ApacheLogParser("%h %l %u %t \"%r\" %&gt;s %O \"%{Referer}i\" \"%{User-Agent}i\"");
   $logLine = $argv[1];
   $entry = $parser-&gt;parse($logLine);
   $method='';
   $url='';
   $protocol='';
   if(isset($entry-&gt;request)){
        $arrReq=explode(" ",$entry-&gt;request);
        if(count($arrReq)==3){
            $method=$arrReq[0];
            $url=$arrReq[1];
            $protocol=$arrReq[2];
        }
   }
   $entry-&gt;stamp=@date("Y:m:d h:i:s",$entry-&gt;stamp);
   $mapping=array(
        'host'=&gt;$entry-&gt;host,
        'logname'=&gt;$entry-&gt;logname,
        'user'=&gt;$entry-&gt;user,
        'time'=&gt;$entry-&gt;stamp,
        'method'=&gt;$method,
        'url'=&gt;$url,
        'protocol'=&gt;$protocol,
        'status'=&gt;$entry-&gt;status,
        'sentbytes'=&gt;$entry-&gt;sentBytes,
        'referer'=&gt;$entry-&gt;HeaderReferer,
        'useragent'=&gt;$entry-&gt;HeaderUserAgent
   );
   echo json_encode($mapping);

Now you have to just keep running of shell script….

$sh &lt;shell script name&gt; &amp; &lt;/shell&gt;

Categories: Elasticsearch, Linux, Website Peformance

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Import MySQL data into elasticsearch

26/03/2013 Article

There are various ways to import mysql data into elasticsearch. Couple of as follows.

Read one by one record and run curl e.g. curl -XPUT ‘http://localhost:9200/ …
By using JDBC and elasticsearch river.

Using JDBC and Elasticsearch River

Install JDBC river plugin

./bin/plugin -url http://bit.ly/10FJhEd -install river-jdbc

Download MySQL JDBC driver

http://dev.mysql.com/downloads/mirror.php?id=412177
unzip mysql-connector-java-5.1.21-bin.zip
cp mysql-connector-java-5.1.21-bin.jar $ES_HOME/plugins/river-jdbc/
./bin/elasticsearch -f

Import table from mysql

curl -XPUT 'localhost:9200/_river/jdbc/_meta' -d '{
"type" : "jdbc",
"jdbc" : {
"driver" : "com.mysql.jdbc.Driver",
"url" : "jdbc:mysql://localhost:3306/test",
"user" : "",
"password" : "",
"sql" : " select * from test;"
},
"index" : {
"index" : "jdbc",
"type" : "jdbc"
}
}'

Select table data from elasticsearch

curl -XGET 'http://localhost:9200/jdbc/_search?q=*'

Display indexed data on browser interface.

bin/plugin -install OlegKunitsyn/elasticsearch-browser

Open http://localhost:9200/_plugin/browser/?database=[index]&table=[type]

Ref. From –

https://github.com/jprante/elasticsearch-river-jdbc/wiki/Quickstart

https://github.com/OlegKunitsyn/elasticsearch-browser/wiki

Please note :- Latest elasticsearch has deprecated rivers – https://www.elastic.co/blog/deprecating-rivers

Categories: Elasticsearch, Linux, Website Peformance

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Elastic Search : Create Index and Search Index

26/03/2013 Article

Creating indexwatch full The Great Wall film online

It is very easy to create index in elastic search. There are various php api/lib available couple of most used are …

https://github.com/nervetattoo/elasticsearch
https://github.com/ruflin/Elastica

curl -XPUT 'http://localhost:9200/database/user/1' -d '
{
"user_login": "appa",
"name": "Appasaheb Sawant",
"postDate": "2013-03-11",
"body": "I am a Sr. Software Engineer." ,
"email": "appasaheb.sawant@gmail.com"
}'

//Command Output

{"ok":true,"_index":"database","_type":"user","_id":"1","_version":2}


curl -XPUT 'http://localhost:9200/database/user/2' -d '
{
"user_login": "sarita",
"name": "Sarita Sawant",
"postDate": "2013-03-25",
"body": "I am a Payroll Assistant",
"email": "test@gmail.com"
}'

//Command Output

{"ok":true,"_index":"database","_type":"user","_id":"2","_version":1}

//Search Index

http://127.0.0.1:9200/database/user/1
http://127.0.0.1:9200/database/user/2
http://127.0.0.1:9200/database/user/_search?q=body:software
http://127.0.0.1:9200/database/user/_search?q=-body:engineer
http://127.0.0.1:9200/database/user/_search?q=user_login:sarita&body:software&pretty=true

Categories: Elasticsearch, Linux, Website Peformance

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