How do you query Grafana Loki?

How do you query Grafana Loki?

To access Loki settings, click the Configuration (gear) icon, then click Data Sources, and then click the Loki data source. The data source name. This is how you refer to the data source in panels, queries, and Explore. Default data source that is pre-selected for new panels.

How do you query logs in Loki?

a log stream selector {container=”query-frontend”,namespace=”loki-dev”} which targets the query-frontend container in the loki-dev namespace….Line Filter Expression

1. |= : Log line contains string.
2. !=
3. |~ : Log line contains a match to the regular expression.

How labels in Loki can make log queries faster and easier?

By using a single label, you can query many streams. By combining several different labels, you can create very flexible log queries. Labels are the index to Loki’s log data. They are used to find the compressed log content, which is stored separately as chunks.

How do I create a filter in Grafana?

How it Works

1. Create a Filter in Skedler reports based on the template variables assigned for the particular Grafana dashboard as shown below, Create filters in the following format, variableName: value.
2. Schedule a report based on Grafana dashboard and use the created filter query in Select Filter section.
3. Save the report.

Is Grafana Loki free?

Loki can be run on-prem or as a free demo on Grafana Cloud.

How does Grafana Loki work?

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.

How do you send logs to Grafana Loki?

Quickly let’s start the installation steps:

1. Step 1 – Install Grafana Monitoring Tool. In this section we will cover installation of Grafana on Ubuntu.
2. Step 2 – Install Grafana Loki Log aggregation System.
3. Step 3 – Install Promtail Agent.
4. Step 4 – Configure Loki Data Source.
5. Step 5 – Visualize Logs on Grafana with Loki.

What is Grafana Loki?

How do I use Grafana variables?

To create a new variable, go to your Grafana dashboard settings, navigate to the Variable option in the side-menu, and then click the Add variable button. In this case, we use the Query type, where our variable will be defined as the result of an SQL query. Under the General section, we name our variable route .

How do I merge two tables in Grafana?

How to merge (join) two tables in a specific way in Grafana using InfluxDB Flux query?

1. Table1 Columns: [Tag1+Tag2, _value] where _value is the units this year.
2. Table2 Columns: [Tag1+Tag2, _value] where _value is the units this month.
3. Table3 Columns: [Tag1+Tag2, _value] where _value is the units this day.

What does Grafana Loki do?

Grafana Loki is a set of components that can be composed into a fully featured logging stack. Unlike other logging systems, Loki is built around the idea of only indexing metadata about your logs: labels (just like Prometheus labels).

How does Loki and Promtail work?

Loki components Loki is a TSDB (Time-series database), it stores logs as split and gzipped chunks of data. The logs are ingested via the API and an agent, called Promtail (Tailing logs in Prometheus format), will scrape Kubernetes logs and add label metadata before sending it to Loki.

What can you do with labels in Loki?

By using a single label, you can query many streams. By combining several different labels, you can create very flexible log queries. Labels are the index to Loki’s log data. They are used to find the compressed log content, which is stored separately as chunks.

What kind of queries do you use in Loki?

Loki comes with its own PromQL-inspired language for queries called LogQL . LogQL can be considered a distributed grep that aggregates log sources. LogQL uses labels and operators for filtering. There are two types of LogQL queries:

Why do I need a log stream selector in Loki?

Due to Loki’s design, all LogQL queries are required to contain a log stream selector. The log stream selector will reduce the number of log streams to a manageable volume.

How does Loki search for an IP address?

Behind the scenes, Loki will break up that query into smaller pieces (shards), and open up each chunk for the streams matched by the labels and start looking for this IP address. The size of those shards and the amount of parallelization is configurable and based on the resources you provision.

https://www.youtube.com/watch?v=7h1-YMFjldI