What is Loki Kubernetes?

Open sourced by Grafana Labs during KubeCon Seattle 2018, Loki is a logging backend optimized for users running Prometheus and Kubernetes with great logs search and visualization in Grafana 6.0. Grafana Loki is a set of components, that can be composed into a fully featured logging stack.

What is Loki Software?

Loki is a horizontally scalable, highly available, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.

What is Loki and Promtail?

Promtail is an agent which ships the contents of local logs to a private Grafana Loki instance or Grafana Cloud. It is usually deployed to every machine that has applications needed to be monitored. It primarily: Discovers targets. Attaches labels to log streams.

What is Loki vs Prometheus?

Loki is like Prometheus, but for logs: we prefer a multidimensional label-based approach to indexing, and want a single-binary, easy to operate system with no dependencies. Loki differs from Prometheus by focusing on logs instead of metrics, and delivering logs via push, instead of pull.

What is Loki distributed?

As an application, Loki is built out of many component microservices, and is designed to run as a horizontally-scalable distributed system. Loki's unique design compiles the code of the entire distributed system into a single binary or Docker image.

[ Kube 100 ] Getting started with Grafana Loki in Kubernetes

How do you deploy Loki on Kubernetes?

What is Loki ruler?

Rules and the Ruler. Grafana Loki includes a component called the Ruler, adapted from our upstream project, Cortex. The Ruler is responsible for continually evaluating a set of configurable queries and performing an action based on the result. This example configuration sources rules from a local disk.

How does Loki store data?

Loki receives logs in separate streams, where each stream is uniquely identified by its tenant ID and its set of labels. As log entries from a stream arrive, they are compressed as “chunks” and saved in the chunks store. See chunk format for how chunks are stored internally.

What is Thanos software?

Overview. Thanos is a set of components that can be composed into a highly available metric system with unlimited storage capacity, which can be added seamlessly on top of existing Prometheus deployments. Thanos is a CNCF Incubating project.

How do you view Loki?

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How run Loki in Linux?

How do you set up Loki and Promtail?

What is Prometheus and Grafana?

Prometheus collects rich metrics and provides a powerful querying language; Grafana transforms metrics into meaningful visualizations. Both are compatible with many, if not most, data source types. In fact, it is very common for DevOps teams to run Grafana on top of Prometheus.

What is the cloud in Loki?

But Loki and Sylvie learned this void was inhabited by an entity named Alioth, which manifests as a massive cloud that consumes all matter. Alioth is essentially the last defense guarding the real founder of the TVA, a powerful being whose only interest seems to be to feed.

Does Loki have a UI?

Grafana's user interface for Loki is part of a new Grafana feature called Explore. Explore got started with a more query-oriented workflow around troubleshooting with Prometheus metrics.

What is Thanos and Grafana?

Thanos is a monitoring system that aggregates data from multiple Prometheus deployments. This data can then be inspected and analyzed using Grafana, just as with regular Prometheus metrics.

What is Prometheus and Thanos?

Thanos brings high availability and long-term storage capabilities to Prometheus. In addition, Thanos allows us to aggregate data from multiple Prometheus targets and query them from a single query endpoint. It can also automatically deal with metric duplication that may arise from multiple Prometheus deployments.

Why do we need Thanos?

Thanos can help any organization using Prometheus that needs to enable high availability and virtually unlimited historical data storage. Using Thanos makes it easier to scale Prometheus horizontally and obtain a global view of data from multiple Prometheus servers.

What database does Loki use?

Cassandra is a popular database and one of Loki's possible chunk stores and is production safe.

What database does Grafana use?

Grafana by default uses sqlite3 as a local database to hold the configuration information (such as users, dashboards, alerts, etc.).

What is Grafana tool?

Grafana is a multi-platform open source analytics and interactive visualization web application. It provides charts, graphs, and alerts for the web when connected to supported data sources.

How do I monitor logs in Grafana?

After login into the Grafana, click on the Explore tab. Select data source as Loki and enter the {app=”nginx”} in Log labels. Note that metadata of Nginx deployment contains the label app=nginx which is the same that filters out logs in Loki. Alerts enter into the Pending state as soon as its condition satisfies.

How do you create a rule in Prometheus?

To include rules in Prometheus, create a file containing the necessary rule statements and have Prometheus load the file via the rule_files field in the Prometheus configuration. Rule files use YAML. The rule files can be reloaded at runtime by sending SIGHUP to the Prometheus process.

Who is Loki and Thor?

Loki was represented as the companion of the great gods Odin and Thor, helping them with his clever plans but sometimes causing embarrassment and difficulty for them and himself. He also appeared as the enemy of the gods, entering their banquet uninvited and demanding their drink.