Like Prometheus, but for logs.

prometheus hacktoberfest grafana cloudnative logging loki

History

Robert Fratto 65ba42a6e7 Documentation Rewrite (#982 ) * docs: create structure of docs overhaul This commit removes all old docs and lays out the table of contents and framework for how the new documentation will be intended to be read. * docs: add design docs back in * docs: add community documentation * docs: add LogQL docs * docs: port existing operations documentation * docs: add new placeholder file for promtail configuration docs * docs: add TOC for operations/storage * docs: add Loki API documentation * docs: port troubleshooting document * docs: add docker-driver documentation * docs: link to configuration from main docker-driver document * docs: update API for new paths * docs: fix broken links in api.md and remove json marker from examples * docs: incorporate api changes from #1009 * docs: port promtail documentation * docs: add TOC to promtail configuration reference * docs: fix promtail spelling errors * docs: add loki configuration reference * docs: add TOC to configuration * docs: add loki configuration example * docs: add Loki overview with brief explanation about each component * docs: add comparisons document * docs: add info on table manager and update storage/README.md * docs: add getting started * docs: incorporate config yaml changes from #755 * docs: fix typo in releases url for promtail * docs: add installation instructions * docs: add more configuration examples * docs: add information on fluentd client fluent-bit has been temporarily removed until the PR for it is merged. * docs: PR review feedback * docs: add architecture document * docs: add missing information from old docs * `localy` typo Co-Authored-By: Ed Welch <ed@oqqer.com> * docs: s/ran/run/g * Typo * Typo * Tyop * Typo * docs: fixed typo * docs: PR feedback * docs: @cyriltovena PR feedback * docs: add more details to promtail url config option * docs: expand promtail's pipelines document with extra detail * docs: remove reference to Stage interface in pipelines.md * docs: fixed some spelling * docs: clarify promtail configuration and scraping * docs: attempt #2 at explaining promtail's usage of machine hostname * docs: spelling fixes * docs: add reference to promtail custom metrics and fix silly typo * docs: cognizant -> aware * docs: typo * docs: typos * docs: add which components expose which API endpoints in microservices mode * docs: change ksonnet installation to tanka * docs: address most @pracucci feedback * docs: fix all spelling errors so reviewers don't have to keep finding them :) * docs: incorporate changes to API endpoints made in #1022 * docs: add missing loki metrics * docs: add missing promtail metrics * docs: @pstribrany feedback * docs: more @pracucci feedback * docs: move metrics into a table * docs: update push path references to /loki/api/v1/push * docs: add detail to further explain limitations of monolithic mode * docs: add alternative names to modes_of_operation diagram * docs: add log ordering requirement * docs: add procedure for updating docs with latest version * docs: separate out stages documentation into one document per stage * docs: list supported stores in storage documentation * docs: add info on duplicate log lines in pipelines * docs: add line_format as key feature to fluentd * docs: hopefully final commit :)		6 years ago
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docker-driver	Documentation Rewrite (#982 )	6 years ago
promtail	Documentation Rewrite (#982 )	6 years ago
README.md	Documentation Rewrite (#982 )	6 years ago
fluentd.md	Documentation Rewrite (#982 )	6 years ago

README.md

Loki Clients

Loki supports the following official clients for sending logs:

Picking a Client

While all clients can be used simultaneously to cover multiple use cases, which client is initially picked to send logs depends on your use case.

Promtail is the client of choice when you're running Kubernetes, as you can configure it to automatically scrape logs from pods running on the same node that Promtail runs on. Promtail and Prometheus running together in Kubernetes enables powerful debugging: if Prometheus and Promtail use the same labels, users can use tools like Grafana to switch between metrics and logs based on the label set.

Promtail is also the client of choice on bare-metal: since it can be configured to tail logs from all files given a host path, it is the easiest way to send logs to Loki from plain-text files (e.g., things that log to /var/log/*.log).

When using Docker and not Kubernetes, the Docker Logging driver should be used, as it automatically adds labels appropriate to the running container.

The Fluentd plugin is ideal when you already have Fluentd deployed and you don't need the service discovery capabilities of Promtail.