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Splunk SDKs are designed to allow you to develop applications from the GROUND up and not require Splunk WEB or any components from the Splunk App Framework. These are SEPARATELY licensed to you from the Splunk Software and do not alter the Splunk Software.Splunk App Framework resides within Splunk’s web server and permits you to CUSTOMIZE the Splunk Web UI that comes with the product and develop Splunk apps using the Splunk web server. It is an important part of the features and functionalities of Splunk Software , which does not license users to MODIFY anything in the Splunk Software.

Splunk SDKs are designed to allow you to develop applications from the ground up and not require Splunk Web or any components from the Splunk App Framework. These are separately licensed to you from the Splunk Software and do not alter the Splunk Software.Splunk App Framework resides within Splunk’s web server and permits you to customize the Splunk Web UI that comes with the product and develop Splunk apps using the Splunk web server. It is an important part of the features and functionalities of Splunk Software , which does not license users to modify anything in the Splunk Software.

At indexer splunk keeps track of INDEXED EVENTS in a directory called fish buckets (default location /opt/splunk/var/lib/splunk).
It CONTAINS seek POINTERS and CRCs for the files you are indexing, so splunkd can tell if it has read them already.

At indexer splunk keeps track of indexed events in a directory called fish buckets (default location /opt/splunk/var/lib/splunk).
It contains seek pointers and CRCs for the files you are indexing, so splunkd can tell if it has read them already.

Mapreduce algorithm is secret behind splunk fast data searching speed.It’s an algorithm TYPICALLY used for batch based large SCALE parallelization.It’s INSPIRED by FUNCTIONAL programming’s map() and reduce () functions.

Mapreduce algorithm is secret behind splunk fast data searching speed.It’s an algorithm typically used for batch based large scale parallelization.It’s inspired by functional programming’s map() and reduce () functions.

License violation warning means splunk has indexed more data than our purchased license quota.We have to identify which index/sourcetype has received more data recently than usual daily data volume.We can CHECK on splunk license master pool WISE available quota and identify the pool for which violation is occurring.Once we know the pool for which we are receiving more data then we have to identify top sourcetype for which we are receiving more data than usual data.Once sourcetype is identified then we have to find out SOURCE machine which is sending huge NUMBER of logs and root CAUSE for the same and troubleshoot accordingly.

License violation warning means splunk has indexed more data than our purchased license quota.We have to identify which index/sourcetype has received more data recently than usual daily data volume.We can check on splunk license master pool wise available quota and identify the pool for which violation is occurring.Once we know the pool for which we are receiving more data then we have to identify top sourcetype for which we are receiving more data than usual data.Once sourcetype is identified then we have to find out source machine which is sending huge number of logs and root cause for the same and troubleshoot accordingly.

Below are STEPS to add folder access logs to splunk:

• Enable Object Access Audit through group policy on windows machine on which folder is LOCATED
• Enable auditing on specific folder for which you want to monitor logs
• Install splunk universal FORWARDER on windows machine
• CONFIGURE universal forwarder to send security logs to splunk indexer

Below are steps to add folder access logs to splunk:

Both are features provided splunk for high AVAILABILITY of splunk search head in case any ONE search head goes down.Search head CLUSTER is NEWLY introduced and search head pooling will be removed in next UPCOMING versions.Search head cluster is managed by captain and captain controls its slaves.Search head cluster is more reliable and efficient than search head pooling.

Both are features provided splunk for high availability of splunk search head in case any one search head goes down.Search head cluster is newly introduced and search head pooling will be removed in next upcoming versions.Search head cluster is managed by captain and captain controls its slaves.Search head cluster is more reliable and efficient than search head pooling.

$SPLUNK_HOME/var/run/splunk/dispatch contains a directory for each search that is running or has COMPLETED. For example, a directory NAMED 1434308943.358 will contain a CSV file of its search RESULTS, a search.log with details about the search execution, and other stuff. Using the defaults (which you can override in limits.conf), these directories will be deleted 10 minutes after the search completes – unless the user saves the search results, in which case the results will be deleted after 7 DAYS.

$SPLUNK_HOME/var/run/splunk/dispatch contains a directory for each search that is running or has completed. For example, a directory named 1434308943.358 will contain a CSV file of its search results, a search.log with details about the search execution, and other stuff. Using the defaults (which you can override in limits.conf), these directories will be deleted 10 minutes after the search completes – unless the user saves the search results, in which case the results will be deleted after 7 days.

By watching data from SPLUNK’s metrics log in real-time.
index=”_internal” SOURCE=”*metrics.log” group=”per_sourcetype_thruput” series=”<your_sourcetype_here>” |
eval MB=kb/1024 | chart sum(MB)
or to watch everything happening split by sourcetype….
index=”_internal” source=”*metrics.log” group=”per_sourcetype_thruput” | eval MB=kb/1024 | chart sum(MB) avg(eps) over series
And if you’re having trouble with a data input and you WANT a way to troubleshoot it, particularly if your whitelist/blacklist rules aren’t working the way you expect.

By watching data from splunk’s metrics log in real-time.
index=”_internal” source=”*metrics.log” group=”per_sourcetype_thruput” series=”<your_sourcetype_here>” |
eval MB=kb/1024 | chart sum(MB)
or to watch everything happening split by sourcetype….
index=”_internal” source=”*metrics.log” group=”per_sourcetype_thruput” | eval MB=kb/1024 | chart sum(MB) avg(eps) over series
And if you’re having trouble with a data input and you want a way to troubleshoot it, particularly if your whitelist/blacklist rules aren’t working the way you expect.

This can be done by defining a REGEX to match the necessary EVENT(s) and send everything else to nullqueue.Here is a basic example that will drop everything except events that contain the string LOGIN In props.conf:
<code>[source::/var/log/foo]
# Transforms must be applied in this order
# to make SURE events are dropped on the
# FLOOR prior to making their way to the
# index processor
TRANSFORMS-set= setnull,setparsing
</code>

 In transforms.conf
[setnull] REGEX = . DEST_KEY = queue FORMAT = nullQueue
[setparsing]
REGEX = login
DEST_KEY = queue
FORMAT = indexQueue

This can be done by defining a regex to match the necessary event(s) and send everything else to nullqueue.Here is a basic example that will drop everything except events that contain the string login In props.conf:
<code>[source::/var/log/foo]
# Transforms must be applied in this order
# to make sure events are dropped on the
# floor prior to making their way to the
# index processor
TRANSFORMS-set= setnull,setparsing
</code>

 In transforms.conf
[setnull] REGEX = . DEST_KEY = queue FORMAT = nullQueue
[setparsing]
REGEX = login
DEST_KEY = queue
FORMAT = indexQueue

It’s a directory or index at default location /opt/splunk/var/lib/splunk .It CONTAINS seek pointers and CRCs for the FILES you are INDEXING, so splunkd can tell if it has read them already.We can access it through GUI by seraching for “index=_thefishbucket”

It’s a directory or index at default location /opt/splunk/var/lib/splunk .It contains seek pointers and CRCs for the files you are indexing, so splunkd can tell if it has read them already.We can access it through GUI by seraching for “index=_thefishbucket”

File PRECEDENCE is as follows:

• System LOCAL directory: HIGHEST priority
• App local DIRECTORIES
• App default directories
• System default directory: lowest priority

File precedence is as follows:

Basically both contains preconfigured configuration and REPORTS ETC but splunk add on do not have visual app. Splunk APPS have preconfigured visual app.

Basically both contains preconfigured configuration and reports etc but splunk add on do not have visual app. Splunk apps have preconfigured visual app.

SPLUNK btool is a command line tool that helps us to TROUBLESHOOT CONFIGURATION file issues or just see what values are being used by your Splunk Enterprise installation in EXISTING environment

Splunk btool is a command line tool that helps us to troubleshoot configuration file issues or just see what values are being used by your Splunk Enterprise installation in existing environment

DELETE FOLLOWING FILE on SPLUNK SERVER :

$splunk_home/var/log/splunk/searches.log

Delete following file on splunk server :

$splunk_home/var/log/splunk/searches.log

SET VALUE OFFENSIVE=Less in splunk_launch.conf

Set value OFFENSIVE=Less in splunk_launch.conf

To reset your password log in to server on which SPLUNK is installed and rename passwd file at below location and then restart splunk.After restart you can login USING DEFAULT USERNAME: ADMIN password: changeme
$splunk-homeetcpasswd

To reset your password log in to server on which splunk is installed and rename passwd file at below location and then restart splunk.After restart you can login using default username: admin password: changeme
$splunk-homeetcpasswd

SOURCETYPE is SPLUNK WAY of IDENTIFYING DATA

Sourcetype is splunk way of identifying data

$SPLUNK_HOME/bin/splunk DISABLE boot-start

$SPLUNK_HOME/bin/splunk disable boot-start

$SPLUNK_HOME/bin/splunk ENABLE boot-start.

$SPLUNK_HOME/bin/splunk enable boot-start.

PS AUX | GREP SPLUNK.

ps aux | grep splunk.

SPLUNK START splunkd.

Splunk start splunkd.

SPLUNK START splunkweb

Splunk start splunkweb

They are INCLUDED with SPLUNK, no NEED to PURCHASE SEPARATELY.

They are included with splunk, no need to purchase separately.

MIDNIGHT to midnight on the CLOCK of the LICENSE MASTER.

Midnight to midnight on the clock of the license master.

How much DATA you can INDEX PER calendar DAY.?

How much data you can index per calendar day.?

• LOGSTASH
• Loggly
• Loglogic
• SUMO LOGIC ETC..

Stats COMMAND generate SUMMARY STATISTICS of all existing fields in your search results and save them as values in new fields. Eventstats is similar to the stats command, except that aggregation results are added inline to each event and only if the aggregation is PERTINENT to that event. eventstats computes the requested statistics like stats, but aggregates them to the original raw DATA.

Stats command generate summary statistics of all existing fields in your search results and save them as values in new fields. Eventstats is similar to the stats command, except that aggregation results are added inline to each event and only if the aggregation is pertinent to that event. eventstats computes the requested statistics like stats, but aggregates them to the original raw data.

Splunk places indexed data in directories, called as “buckets”. It is physically a directory containing events of a certain period.
A bucket MOVES through several stages as it ages:

• Hot: Contains newly indexed data. Open for writing. One or more hot buckets for each index.
• WARM: Data rolled from hot. There are MANY warm buckets.
• Colld: Data rolled from warm. There are many cold buckets.
• Frozen: Data rolled from cold. The indexer deletes frozen data by default, but you can also archive it. Archived data can later be thawed (Data in frozenbuckets is not searchable)

By default, your buckets are located in $SPLUNK_HOME/var/lib/splunk/defaultdb/db. You should see the hot-db there, and any warm buckets you have.By default, Splunk sets the bucket SIZE to 10GB for 64bit systems and 750MB on 32bit systems.

Splunk places indexed data in directories, called as “buckets”. It is physically a directory containing events of a certain period.
A bucket moves through several stages as it ages:

By default, your buckets are located in $SPLUNK_HOME/var/lib/splunk/defaultdb/db. You should see the hot-db there, and any warm buckets you have.By default, Splunk sets the bucket size to 10GB for 64bit systems and 750MB on 32bit systems.

• CHECK splunkd.log for any errors
• Check SERVER performance issues i.e. cpu/memory usage,DISK i/o etc
• Install SOS (Splunk on splunk) app and check for warning and errors in dashboard

check number of saved searches currently RUNNING and their system RESOURCES consumption install Firebug, which is a firefox extension. After it’s installed and enabled, log into splunk (using firefox), open firebug’s panels, switch to the ‘Net’ panel (you will have to enable it).The Net panel will show you the HTTP requestsand responses along with the time spent in each. This will give you a lot of information quickly over which requests are hanging splunk for a few seconds, and which are blameless. etc..

check number of saved searches currently running and their system resources consumption install Firebug, which is a firefox extension. After it’s installed and enabled, log into splunk (using firefox), open firebug’s panels, switch to the ‘Net’ panel (you will have to enable it).The Net panel will show you the HTTP requestsand responses along with the time spent in each. This will give you a lot of information quickly over which requests are hanging splunk for a few seconds, and which are blameless. etc..

The transaction command is most useful in two specific cases:

Unique id (from one or more fields) alone is not sufficient to discriminate between two transactions. This is the case when the identifier is REUSED, for example web sessions identified by cookie/client IP. In this case, time span or pauses are also USED to segment the DATA into transactions. In other cases when an identifier is reused, say in DHCP logs, a particular message may identify the BEGINNING or end of a transaction. When it is desirable to see the raw TEXT of the events combined rather than analysis on the constituent fields of the events.

In other cases, it’s usually better to use stats as the performance is higher, especially in a distributed search environment. Often there is a unique id and stats can be used.

The transaction command is most useful in two specific cases:

Unique id (from one or more fields) alone is not sufficient to discriminate between two transactions. This is the case when the identifier is reused, for example web sessions identified by cookie/client IP. In this case, time span or pauses are also used to segment the data into transactions. In other cases when an identifier is reused, say in DHCP logs, a particular message may identify the beginning or end of a transaction. When it is desirable to see the raw text of the events combined rather than analysis on the constituent fields of the events.

In other cases, it’s usually better to use stats as the performance is higher, especially in a distributed search environment. Often there is a unique id and stats can be used.

There are multiple WAYS we can extract IP ADDRESS from logs.Below are few examples.

REGULAR Expression for extracting ip address:

rex field=_raw “(?<ip_address>d+.d+.d+.d+)”
OR
rex field=_raw “(?<ip_address>([0-9]{1,3}[.]){3}[0-9]{1,3})”

There are multiple ways we can extract ip address from logs.Below are few examples.

Regular Expression for extracting ip address:

rex field=_raw “(?<ip_address>d+.d+.d+.d+)”
OR
rex field=_raw “(?<ip_address>([0-9]{1,3}[.]){3}[0-9]{1,3})”

SPLUNK DB Connect is a generic SQL DATABASE plugin for Splunk that ALLOWS you to easily integrate database information with Splunk queries and REPORTS.

Splunk DB Connect is a generic SQL database plugin for Splunk that allows you to easily integrate database information with Splunk queries and reports.

• The Summary index is the default summary index (the index that Splunk Enterprise uses if you do not INDICATE ANOTHER one).
• If you plan to run a variety of summary index reports you MAY need to create additional summary INDEXES.

License slave will START a 24-hour TIMER, after which search will be BLOCKED on the license slave (though indexing CONTINUES). users Will not be able to search data in that slave until it can reach license master again.

License slave will start a 24-hour timer, after which search will be blocked on the license slave (though indexing continues). users Will not be able to search data in that slave until it can reach license master again.

SPLUNK free LACKS these features:

• Authentication and SCHEDULED searches/alerting
• Distributed search
• Forwarding in TCP/HTTP (to non-splunk)
• Deployment management

Splunk free lacks these features:

$splunkhome/etc/system/default

$splunkhome/etc/system/default

Splunk APP is container/directory of configurations,SEARCHES,dashboards ETC. in splunk

Splunk app is container/directory of configurations,searches,dashboards etc. in splunk

• Enterprise LICENSE
• Free license
• Forwarder license
• BETA license
• Licenses for SEARCH heads (for distributed search)
• Licenses for cluster members (for INDEX REPLICATION)

• props.conf
• indexes.conf
• inputs.conf
• transforms.conf
• server.conf

There are two TYPES of splunk forwarder as below:

• universal forwarder(UF) -Splunk agent INSTALLED on non-Splunk system to gather data locally, can’t parse or indexdata
• Heavy WEIGHT forwarder(HWF) – full instance of splunk with advance functionality.

Generally WORKS as a remote collector, intermediate forwarder, and possible data filter because they parse data, they are not RECOMMENDED for production systems

There are two types of splunk forwarder as below:

Generally works as a remote collector, intermediate forwarder, and possible data filter because they parse data, they are not recommended for production systems

The indexer is the Splunk ENTERPRISE component that creates and manages INDEXES. The PRIMARY functions of an indexer are:

• Indexing incoming DATA.
• Searching the indexed data.

The indexer is the Splunk Enterprise component that creates and manages indexes. The primary functions of an indexer are:

SPLUNK 6.3.

Splunk 6.3.

Below are components of splunk:

• Search head – provides GUI for searching
• Indexer – INDEXES machine DATA
• Forwarder -Forwards LOGS to Indexer
• DEPLOYMENT SERVER -Manges splunk components in distributed environment

Below are components of splunk:

Splunk is Google for your MACHINE DATA.It’s a software/Engine which can be used for searching, visualizing, Monitoring, reporting etc of your ENTERPRISE data. Splunk takes VALUABLE machine data and turns it into POWERFUL operational intelligence by providing real time insight to your data through charts,alerts,reports etc.

Splunk is Google for your machine data.It’s a software/Engine which can be used for searching, visualizing, Monitoring, reporting etc of your enterprise data. Splunk takes valuable machine data and turns it into powerful operational intelligence by providing real time insight to your data through charts,alerts,reports etc.