Kibana Interview Questions

Kibana is basically an open source data visualization which is done in order to get the Elasticsearch. In a general Elasticsearch cluster, Kibana provides visual capacities on the higher context. With the first connection with Kibana, you will get the discover page. By default, all of the ELK steps would be displayed on this and this is the interface.

A tool name Logstash is used for collecting and storing logs. Kibana provides a web interface which enhances the search results and views the logs indexed by Logstash. Kibana is written in JavaScript.

It is a page which is open to create, modify and view custom dashboards. A user gets to compile multiple visuals into a single page and can sort or filter them by applying any search with the elements included in visualization.

The images are available in two different flavours that are X- pack flavour and Oss flavour. X-pack is the default one which is pre-installed. On the other hand, Oss flavour has no interference with X-pack and host but only open source Kibana.

In order to create a Kibana dashboard, first of all, click over the menu item of the dashboard. Then click add visualization icon and follow the process-

• Select 'log count’ pie chart & 'Nginx’ histogram.
• Collapse Add Visualization menu.
• You can rearrange the visuals over dashboard.
• Click on save dashboard icon

On the local host 5601 all of the default settings are configured to run Kibana. In order to change the port number or making a connection to Elasticsearch installed on another machine, you have to update the kibana.yml file. With the startup, Kibana server starts reading the properties of the kibana.yml file.

The elastic stack extension is followed by a bundle of security and monitoring components all into an easily installed package. It also monitors, alerts and reports the segments. When the index is broken into shard and then get sequentially divided forming replicas. Replicas are basically the copies of shards. They are scaled by index.

An entire collection of open source products is known as an electric stack. They are derived from elastic design which basically helps to take data from any source following by any format. This also includes the search, analysis, and visualization of data. ELK stack is a terminology which is given when Electric search, Logstash, and Kibana are used all together.

It is a search engine which provides distributed and multi-tenant search engine with HTTP web interface. Elasticsearch is based on Lucene and schema-free JSON documents. It is developed in Java.

Analyzer entirely transforms the data when it is indexing, internally. Analyzers are composed of multiple tokenizer and token filters. All of them are assembled to get the accurate reference and mapping directions for the data.

Following are the operations which could be performed over documents using Elasticsearch-

• Indexing
• Fetching
• Updating
• Deleting

It is basically an entire collection of multiple servers altogether which beholds the data. It also provides indexing and search liabilities through the service and this cluster is identified by the name ‘Elasticsearch’.

All of the components of ELK stack perform their functioning at their core level. They are empowered by the open source elastic which itself performs as a search platform vendor. The very basic functions include modifications of histograms, lines, Pie Charts, graphs and many more.

For most of the files when log data is shipping then it is done through Filebeat. The segment Filebeat monitors are log directories, log files and many more. File beat executes or forwards them to Elasticsearch or Logstash. File beat is installed on your service as an agent and it is generally all log data shipper for files available.

Kibana hosts the perpetual Elasticsearch data and even navigates through it so that you can efficiently do your searching and modifications with the database. The most prominent interfaces of Kibana are basically divided into the major sections as-

• Discover
• Visualize
• Dashboard
• Settings

Majority of the queries are divided into two types categorizing various segments into it.

1. FULL-TEXT QUERIES - It includes match query, range query, prefix query, common term query and so on.
2. TERM LEVEL QUERIES- It includes term set query, wildcard query, fuzzy query, IDs query and so on.

It is a page which allows a user to change multiple things like index patterns and values. It also includes indices an object selection changes.

A complete platform to modify the customs and change them according to the desires is provided by Kibana visualize interface. This includes from bars to Pie Charts and data tables.

In terms of technical language node is always referred to as a single server or system which is a part of a cluster. It also stores data and anticipates the search capabilities of Server.

In the databases, a document is basically correlated with having the same structural data for common segments. Each of the fields can represent themselves multiple times in a document with the different data types.