The interview process for a Grafana job can vary depending on the company. Though the approach may vary, all interviews have the same goal—employers are looking for the best candidate for the role. To make sure you stand out, you'll need to clearly define the skills and worth you can contribute as a Grafana Professional.
In collaboration with Grafana pros and industry experts, we have put together a list of general Grafana interview questions and answers to help you with your preparation in applying for Grafana jobs. This blog contains 30 top Grafana questions which will definitely help you in a Grafana interview. It’s a must-read blog for anyone looking forward to making a career in Grafana.
Grafana is an open-source data analytics tool for gathering metrics that make sense of enormous volumes of data and monitoring our applications via cool configurable dashboards. Grafana connects to Graphite, Prometheus, Influx DB, ElasticSearch, MySQL, PostgreSQL, and other databases.
Grafana's open-source nature allows us to create custom plugins for a range of data sources.
Time-series analytics is a technique for analysing, tracking and reviewing data over a long period of time.
Grafana dashboards are made to bring data together in an organised and effective way. It employs queries, smart visualisations, and alerts to assist users in better comprehending their data's metrics. Grafana dashboards not only give meaning to data obtained from a variety of sources but can also be shared with other team members, allowing you to collaborate on data analysis.
Here's an example of a Grafana dashboard that's being used to keep track of things:
Graphite, Prometheus, Influx DB, ElasticSearch, MySQL, PostgreSQL, and other plugged-in data sources are used to populate the dashboards. These are just a few of the many data sources Grafana comes pre-loaded with.
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Key features of Grafana:
i) Panels: From heatmaps to histograms. Geo maps to graphs. Grafana's visualisations are fast and flexible, allowing you to visualise your data however you want.
ii) Plugins: Plugins for Grafana enable you to connect your tools and teams. Data source plugins link to existing data sources via APIs and render data in real-time, removing the need for data migration or ingestion.
iii) Alerts: Grafana alerting allows you to centralise and unify all of your alerts by allowing you to create, manage, and silence them all from a single interface.
iv) Transformations: You may rename, summarise, aggregate, and calculate data across several searches and data sources using transformations.
v) Annotations: Rich events from many data sources can be annotated into graphs. You may see all of an event's metadata and tags by hovering your mouse over it.
vi) Panel Editor: With a consistent UI for configuring data settings across all of your visualizations, the panel editor makes it simple to build, alter, and explore all of your panels.
Grafana can only access data from third-party systems like Prometheus, MySQL, Azure Monitor, and Amazon CloudWatch, among others. Grafana is so dependent on other systems for data because it lacks the ability to collect data on its own, whether via agents or other data pipelines.
Grafana isn't a reporting tool; it's a dashboard tool. Grafana is open-source and free, however, it lacks reporting capabilities. Grafana Enterprise Stack edition, which costs at least $3,500 per month, is the only way to get basic reporting functionality.
Grafana is the most widely used open-source tool for querying, visualising and alerting metrics and logs from everywhere. Time-series databases like Graphite, Prometheus, Elasticsearch, OpenTSDB, and InfluxDB are used to query.
Grafana was first launched in 2014 and can now connect to a variety of data sources such as MySQL, SQL Server, Graphite, Prometheus, and others. This tool is most commonly used to build a time-series data visualization, which illustrates the health or utilization of a resource over time.
Grafana Cloud is a scalable, highly available, and performant observability platform for your applications and infrastructure. It allows you to see all of your observability data in one place, whether it's stored in Grafana Cloud Metrics or on your own bare-metal and cloud systems. With built-in support for Prometheus, Elasticsearch, and Amazon CloudWatch, all you have to do is configure data sources in Grafana Cloud to start developing dashboards and querying metrics data.
Grafana Enterprise is a paid version of Grafana that offers capabilities not available in the free source version. Grafana Enterprise gives you access to enterprise plugins, which allow you to use your existing data sources in Grafana. This means you can get the most out of your complicated, costly monitoring solutions and databases by viewing all of the data in a more efficient and effective manner.
Prometheus is an open-source data monitoring tool. Prometheus and Grafana are the industry standard tool combination for deploying a data visualization solution. Grafana is used to visualize the data, and Prometheus is used to fuel the backend.
Prometheus, on the other hand, has data visualization options. Grafana, on the other hand, continues to be the most often used data visualization tool. Prometheus data is retrieved using queries that are initiated from the dashboard. It is the most suitable open-source data model for storing time-series data.
|Metrics of performance.||The data is grouped and loaded in steps.||WAL replay is improved, and memory utilization is optimized.|
|Editing and Visualization of Data||Grafana includes a multitude of choices for showing time-series data as an open-source data visualisation tool. It also provides users with other tools, such as plugins, to help them visualise their data.||Prometheus, on the other hand, must rely on console templates for visualisation. It can graph data, but it has to rely on Grafana for full frameworks like queries and dashboards.|
|Memory||Grafana is nothing more than a data visualisation tool. When it comes to data storage, it is hopeless.||Here, Prometheus has the upper hand. It excels in storing and organising time-series data via important value labelling.|
|Alarms and Tracking||Grafana allows the user to set the time for alert rule evaluation.
Users are told here if the triggered alert needs to be adjusted.
|Prometheus' alarm system is split into two pieces. The alerting rules send messages to alert managers. The alerts are then controlled by alert managers, who may deliver notifications by email or through other channels.|
|Supported Data Sources||AWS CloudWatch, Graphite, Azure Monitor, ElasticSearch||Prometheus collects data metrics from monitored targets by scraping HTTP endpoints.|
The Graphite ecosystem offers a scalable platform for collecting and storing time-series data, as well as a robust collection of functions for querying and analyzing the data over time. Grafana can effortlessly collect Graphite metrics, giving you a powerful tool for collecting, visualizing, and increasing the value of your Graphite data.
A few benefits of integrating Grafana with Graphite have listed below:
|Logs vs. Metrics (Logging vs. Monitoring).||Grafana's design is optimised for analysing and visualising system metrics including CPU, memory, disc, and I/O utilisation. The platform does not allow for full-text data querying.||On the other side, Kibana is an Elasticsearch-based log message analysis tool.|
|Data sources and integrations||Grafana is a graphical user interface for analysing metrics. As a result, it has built-in connections to Graphite, Prometheus, InfluxDB, MySQL, PostgreSQL, and Elasticsearch, as well as plugins for additional data sources.||Kibana, on the other hand, was designed just for Elasticsearch and does not support any other data sources.|
|Authentication and access control||Grafana has built-in user management and authentication options for restricting and controlling access to your dashboards, as well as the ability to leverage an external SQL or LDAP server.||Your Kibana dashboards are open and accessible to the public by default, unless you use the X-Pack or open-source alternatives like SearchGuard.|
|Alerts||Since version 4.x, Grafana has had a built-in alerting engine that allows users to attach conditional rules to dashboard panels and receive triggered alerts to their preferred notification endpoint.||
Kibana doesn't come with an alerting feature by default. To give alerting to Kibana, users can either use a hosted ELK Stack like Logz.io, implement ElastAlert or use X-Pack.
With Amazon Managed Grafana, you can view your metrics, logs, and traces without having to provision servers, configure and update software, or deal with the time-consuming task of protecting and scaling Grafana in production.
You can create, explore, and share observability dashboards with your team to spend less time managing your Grafana infrastructure and more time improving the health, performance, and availability of your apps.
You can connect Amazon Managed Grafana to a variety of observability data sources, including AWS data sources like Amazon Managed Service for Prometheus, Amazon CloudWatch, and Amazon Elasticsearch Service, third-party ISVs like Datadog, and Splunk, and self-managed data sources like InfluxDB. Amazon Managed Grafana integrates seamlessly with AWS services, allowing you to securely add, query, visualize, and analyze your AWS data.
The process how AWS Grafana how is demonstrated in the below image:
Grafana Loki is a log aggregation tool that collects and organizes logs from all of your apps and infrastructure. It offers a unique approach by indexing only the metadata of the log lines rather than the complete text.
The procedure of how Grafana Loki works is explained below:
In Grafana, an exemplar is a specific trace that represents a recurrent pattern of data in a given time interval. It aids in the discovery of higher cardinality metadata inside time series data.
Consider the case when your company's website is seeing an increase in visitors. While more than 80% of users can access the website in less than two seconds, some users are experiencing a longer than typical response time, resulting in a negative user experience.
You must compare a trace for a rapid response to a trace for a slow response in order to determine the elements that are contributing to the latency. Given the enormous volume of data in a typical production setting, this will be a very time-consuming and arduous task.
You can use exemplars to assist isolate faults in your data distribution by isolating query traces with excessive latency within a time interval.
The default and most popular approach to visualize time series data is time series visualization. A line, a dot path, or a group of bars can all be used to represent it. Because of its flexibility, it can display virtually any time-series data.
Common time series options available in Grafana are
Labels are a type of key-value pair. To describe a log stream, we call them metadata. Labels are particularly crucial in Loki since they define a stream. More precisely, the stream is defined by the combination of each label key and value.
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Metrics are units of measurement that describe the size of something, such as the amount of memory in a computer system or the length of a desktop in centimetres. In Grafana, metrics are most useful when they are gathered often over time. This allows us to compare things like how system resource availability is altered when a programme is run.
In a time-series database (TSDB) like Prometheus, these types of metrics are recorded and associated with a time stamp. Although each TSDB has its unique data schema, they all share these two characteristics, and Grafana Cloud can visualise their varied metrics formats.
Visualization is a graph that shows how resource utilization has changed over time. Using visualizations to compare these time-stamped measurements over time makes it quick and straightforward to spot changes in a computer system, particularly as events occur.
Grafana Tempo is an open-source and user-friendly high-volume distributed tracing backend. Tempo is a low-cost operating system that only requires object storage and is strongly integrated with Grafana, Prometheus, and Loki. Tempo supports open-source tracing protocols such as Jaeger, Zipkin, and OpenTelemetry.
[auth.anonymous] # enable anonymous access enabled = true [auth.basic] enabled = false
Plugins make Grafana better by adding features that aren't currently present. You can use plugins to import data from a number of sources, bundle data sources and panels, and add new visualisation types to dashboards.
Panels, data sources, and apps are the three types of plugins supported by Grafana.
Grafana k6 is an open-source load testing tool for engineering teams that makes performance testing simple and efficient. k6 is free, open-source, and extensible.
k6 can be used to assess the reliability and performance of your systems, allowing you to detect performance regressions and problems sooner. k6 will help you create applications that are scalable, robust, and fast.
Some of the most common k6 use-cases are as follows:
Grafana panels are the user interface for creating a data source query as well as processing and structuring data for visualisations. A panel editor includes a query builder as well as a variety of options for data transformation and data addition to your panels.
Alerts allow you to be notified as soon as a system problem arises. Robust and responsive notifications let you discover and resolve problems quickly, reducing service disruption.
Grafana 8.0 included new and improved alerting, which combines alerting data into a single, searchable dashboard. You'll be able to do things like:
Grafana alerts are enabled by default for new OSS installations. For older movies, it's still an opt-in option.
Grafana alerting is made up of four main elements:
You may verify that Grafana is up and running by using the status command, as shown below:
$ sudo systemctl status grafana-server
Make the following changes to default.ini/grafana.ini to enable anonymous login (Grafana\conf).
[auth] # Set to true to disable (hide) the login form, useful if you use OAuth #disable_login_form = false disable_login_form = true
[auth.anonymous] # enable anonymous access enabled = true
# specify organization name that should be used for unauthenticated users org_name = YOUR_ORG_NAME_HERE
# specify role for unauthenticated users org_role = Editor
By now, you've undoubtedly realised how useful and efficient Grafana is. So, if you've honed your skills and gained knowledge in this subject, it's time to proceed to appear for the interview. Thoroughly study these Grafana interview questions and prepare to ace the interview like a pro.
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Madhuri is a Senior Content Creator at MindMajix. She has written about a range of different topics on various technologies, which include, Splunk, Tensorflow, Selenium, and CEH. She spends most of her time researching on technology, and startups. Connect with her via LinkedIn and Twitter .
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