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189 lines
7.5 KiB
189 lines
7.5 KiB
# Prometheus
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[][circleci]
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[][quay]
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[][hub]
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[](https://goreportcard.com/report/github.com/prometheus/prometheus)
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[](https://bestpractices.coreinfrastructure.org/projects/486)
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[](https://gitpod.io/#https://github.com/prometheus/prometheus)
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[](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:prometheus)
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Visit [prometheus.io](https://prometheus.io) for the full documentation,
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examples and guides.
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Prometheus, a [Cloud Native Computing Foundation](https://cncf.io/) project, is a systems and service monitoring system. It collects metrics
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from configured targets at given intervals, evaluates rule expressions,
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displays the results, and can trigger alerts when specified conditions are observed.
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The features that distinguish Prometheus from other metrics and monitoring systems are:
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* A **multi-dimensional** data model (time series defined by metric name and set of key/value dimensions)
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* PromQL, a **powerful and flexible query language** to leverage this dimensionality
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* No dependency on distributed storage; **single server nodes are autonomous**
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* An HTTP **pull model** for time series collection
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* **Pushing time series** is supported via an intermediary gateway for batch jobs
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* Targets are discovered via **service discovery** or **static configuration**
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* Multiple modes of **graphing and dashboarding support**
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* Support for hierarchical and horizontal **federation**
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## Architecture overview
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## Install
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There are various ways of installing Prometheus.
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### Precompiled binaries
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Precompiled binaries for released versions are available in the
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[*download* section](https://prometheus.io/download/)
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on [prometheus.io](https://prometheus.io). Using the latest production release binary
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is the recommended way of installing Prometheus.
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See the [Installing](https://prometheus.io/docs/introduction/install/)
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chapter in the documentation for all the details.
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### Docker images
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Docker images are available on [Quay.io](https://quay.io/repository/prometheus/prometheus) or [Docker Hub](https://hub.docker.com/r/prom/prometheus/).
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You can launch a Prometheus container for trying it out with
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```bash
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docker run --name prometheus -d -p 127.0.0.1:9090:9090 prom/prometheus
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```
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Prometheus will now be reachable at <http://localhost:9090/>.
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### Building from source
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To build Prometheus from source code, You need:
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* Go [version 1.17 or greater](https://golang.org/doc/install).
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* NodeJS [version 16 or greater](https://nodejs.org/).
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* npm [version 7 or greater](https://www.npmjs.com/).
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Start by cloning the repository:
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```bash
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git clone https://github.com/prometheus/prometheus.git
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cd prometheus
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```
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You can use the `go` tool to build and install the `prometheus`
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and `promtool` binaries into your `GOPATH`:
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```bash
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GO111MODULE=on go install github.com/prometheus/prometheus/cmd/...
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prometheus --config.file=your_config.yml
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```
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*However*, when using `go install` to build Prometheus, Prometheus will expect to be able to
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read its web assets from local filesystem directories under `web/ui/static` and
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`web/ui/templates`. In order for these assets to be found, you will have to run Prometheus
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from the root of the cloned repository. Note also that these directories do not include the
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React UI unless it has been built explicitly using `make assets` or `make build`.
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An example of the above configuration file can be found [here.](https://github.com/prometheus/prometheus/blob/main/documentation/examples/prometheus.yml)
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You can also build using `make build`, which will compile in the web assets so that
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Prometheus can be run from anywhere:
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```bash
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make build
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./prometheus --config.file=your_config.yml
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```
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The Makefile provides several targets:
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* *build*: build the `prometheus` and `promtool` binaries (includes building and compiling in web assets)
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* *test*: run the tests
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* *test-short*: run the short tests
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* *format*: format the source code
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* *vet*: check the source code for common errors
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* *assets*: build the React UI
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### Service discovery plugins
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Prometheus is bundled with many service discovery plugins.
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When building Prometheus from source, you can edit the [plugins.yml](./plugins.yml)
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file to disable some service discoveries. The file is a yaml-formated list of go
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import path that will be built into the Prometheus binary.
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After you have changed the file, you
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need to run `make build` again.
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If you are using another method to compile Prometheus, `make plugins` will
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generate the plugins file accordingly.
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If you add out-of-tree plugins, which we do not endorse at the moment,
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additional steps might be needed to adjust the `go.mod` and `go.sum` files. As
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always, be extra careful when loading third party code.
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### Building the Docker image
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The `make docker` target is designed for use in our CI system.
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You can build a docker image locally with the following commands:
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```bash
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make promu
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promu crossbuild -p linux/amd64
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make npm_licenses
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make common-docker-amd64
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```
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*NB* if you are on a Mac, you will need [gnu-tar](https://formulae.brew.sh/formula/gnu-tar).
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## Using Prometheus as a Go Library
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### Remote Write
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We are publishing our Remote Write protobuf independently at
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[buf.build](https://buf.build/prometheus/prometheus/assets).
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You can use that as a library:
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```shell
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go get go.buf.build/protocolbuffers/go/prometheus/prometheus
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```
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This is experimental.
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### Prometheus code base
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In order to comply with [go mod](https://go.dev/ref/mod#versions) rules,
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Prometheus release number do not exactly match Go module releases. For the
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Prometheus v2.y.z releases, we are publishing equivalent v0.y.z tags.
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Therefore, a user that would want to use Prometheus v2.35.0 as a library could do:
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```shell
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go get github.com/prometheus/prometheus@v0.35.0
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```
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This solution makes it clear that we might break our internal Go APIs between
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minor user-facing releases, as [breaking changes are allowed in major version
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zero](https://semver.org/#spec-item-4).
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## React UI Development
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For more information on building, running, and developing on the React-based UI, see the React app's [README.md](web/ui/README.md).
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## More information
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* Godoc documentation is available via [pkg.go.dev](https://pkg.go.dev/github.com/prometheus/prometheus). Due to peculiarities of Go Modules, v2.x.y will be displayed as v0.x.y.
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* You will find a CircleCI configuration in [`.circleci/config.yml`](.circleci/config.yml).
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* See the [Community page](https://prometheus.io/community) for how to reach the Prometheus developers and users on various communication channels.
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## Contributing
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Refer to [CONTRIBUTING.md](https://github.com/prometheus/prometheus/blob/main/CONTRIBUTING.md)
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## License
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Apache License 2.0, see [LICENSE](https://github.com/prometheus/prometheus/blob/main/LICENSE).
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[hub]: https://hub.docker.com/r/prom/prometheus/
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[circleci]: https://circleci.com/gh/prometheus/prometheus
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[quay]: https://quay.io/repository/prometheus/prometheus
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