Currently there are five ways to try out Loki, in order from easier to hardest:
- Use our free hosted demo
- Run Loki locally with Docker
- Use Helm to deploy on Kubernetes
- Build Loki from source
- Get inspired by our production setup
For the various ways to run
promtail, the tailing agent, see our Promtail documentation.
Get a free hosted demo of Grafana Cloud: Logs
Grafana is running a free, hosted demo cluster of Loki. Find instructions for getting access at grafana.com/loki.
The demo includes complimentary metrics (Prometheus or Graphite) that help illustrate the experience of easily switching between logs and metrics.
Run locally using Docker
To test locally, we recommend using the
docker-compose.yaml file in this directory. Docker starts containers for promtail, Loki, and Grafana.
git clonethis repository locally and
cd loki/production, or download a copy of the docker-compose.yaml locally.
Ensure you have the most up-to-date Docker container images:
Run the stack on your local Docker:
Note: When running locally, promtail starts before loki is ready. This can lead to the error message "Data source connected, but no labels received." After a couple seconds, Promtail will forward all newly created log messages correctly. Until this is fixed we recommend building and running from source.
For instructions on how to query Loki, see our usage docs.
Using Helm to deploy on Kubernetes
There is a Helm chart to deploy Loki and promtail to Kubernetes.
Build and run from source
Loki can be run in a single host, no-dependencies mode using the following commands.
go v1.10+ installed locally.
$ go get github.com/grafana/loki $ cd $GOPATH/src/github.com/grafana/loki # GOPATH is $HOME/go by default. $ go build ./cmd/loki $ ./loki -config.file=./cmd/loki/loki-local-config.yaml ...
To build Promtail on non-Linux platforms, use the following command:
$ go build ./cmd/promtail
On Linux, promtail requires the systemd headers to be installed for Journal support.
With Journal support on Ubuntu, run with the following commands:
$ sudo apt install -y libsystemd-dev $ go build ./cmd/promtail
With Journal support on CentOS, run with the following commands:
$ sudo yum install -y systemd-devel $ go build ./cmd/promtail
Otherwise, to build promtail without Journal support, run
with CGO disabled:
$ CGO_ENABLED=0 go build ./cmd/promtail
Once Promtail is built, to run Promtail, use the following command:
$ ./promtail -config.file=./cmd/promtail/promtail-local-config.yaml ...
Grafana is Loki's UI. To query your logs you need to start Grafana as well:
$ docker run -ti -p 3000:3000 grafana/grafana:master
For instructions on how to use loki, see our usage docs.
Get inspired by our production setup
We run Loki on Kubernetes with the help of ksonnet. You can take a look at our production setup.
To learn more about ksonnet, check out its documentation.