If you’ve never heard of Splunk, you might be slightly confused about how to use it. While the concepts are easy to understand, you’ll need to learn a bit about its querying language and standard operations. Once you have the language basics, the Splunk application will make solving problems much more accessible. Its fast results will save you a lot of troubleshooting time and help you find the cause of any issues. It also allows you to create graphs, warnings, and other information to help you understand a situation.
Indexer
Splunk is a data analysis platform that is built for search and analysis. It works by indexing log data and applying user-defined transformation actions. It also supports clustering, which helps save space and prevent data loss. The indexer is an integral part of Splunk and enables users to search and analyze the data on a cluster. In addition, users can configure alerts, save searches, and build reports using the Splunk indexer.
For maximum performance, collecting events as close as possible to indexers is essential. You can use the Splunk Universal Forwarder to gather events from your network and send them to your indexers. This will improve the speed of your search head. Additionally, you should use separate IP addresses for your indexers. This will make your deployment more flexible and provide fine-grained troubleshooting. Another important tip is to use a consistent naming scheme.
When you’re using the Splunk indexer, data is parsed into buckets. Each bucket represents a directory. The buckets are categorized into different categories. For example, one bucket is “hot” when actively building and continuously adding data. Another bucket is “closed” when it reaches a certain age and no longer adds information. Eventually, each bucket becomes a point of the record.
Universal Forward
Using Splunk Enterprise, you can use universal forwarders to gather data. This tutorial walks you through the process. You’ll need to have a universal forwarder installed on your server before you can access the data. After you install the universal forwarder, you’ll need to configure it to work correctly.
First, you must create an account with Splunk. Once you have done so, you’ll receive an email with your login information. Once you’ve done this, you can go to the Splunk Cloud Platform home page and select Universal Forwarder. This will take you to the Universal Forwarder setup page.
If you’re running Linux, you’ll need to install the Universal Forwarder separately from Splunk Enterprise. While the configuration files are identical, the package formats differ from Linux distribution to distribution. For instance, RedHat-based Linux distributions (RHEL, CentOS) use RPM installations.
Load balancer
When setting up a Splunk load balancer, selecting the appropriate port for the Splunk web server is essential. Usually, this is port 9997. In addition, you will want to make sure that you’ve enabled originating subnet requests globally. You can do this in the LoadMaster Web User Interface.
After choosing the appropriate port, you can select each receiver’s hostname and port number. In addition, you can set the TLS settings to be inherited from the group settings if needed. You can also select the stored secret or create a new one. The Destinations section will only appear if you have set indexer discovery to “No default”. It will allow you to define a known list of Splunk receivers.
After configuring the two receivers, you can configure them to receive equal amounts of data. The default time interval for balancing statistics is 300 seconds. You should set this period well in advance to avoid indexer discovery failures. You should also make sure to check the failover site settings. The failover site should be configured so that if one place fails, the other will receive the data.
Search head
The search head (SH) is integral to Splunk architecture. It provides a graphical user interface and allows users to query the data stored by the Splunk Indexer. It can be installed on a separate or the same server as other Splunk components. Unlike other parts of Splunk, the search head doesn’t require a separate installation file. Instead, it is installed by enabling the Splunk web service.
The architecture of the Splunk system includes three components: a forwarder that collects data from remote machines, the indexer that stores the data, and the Search Head, which performs various functions on the data stored by the Indexers. In addition, the search head is responsible for producing knowledge objects that enable operational intelligence.
When configuring the search head, it is essential to consider the type of event it will collect. For example, if the search is capturing network traffic, it may be a good idea to set up a Universal Forwarder to forward data to a new indexer. This can improve the speed of the search head. It is also essential to use separate IP addresses for search heads and indexers. This allows for more flexible deployment, better access control, and fine-grained troubleshooting.
