The Prometheus monitoring system and time series database.
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Bryan Boreham 040ef175eb
Optimise WAL loading by removing extra map and caching min-time (#9160)
* BenchmarkLoadWAL: close WAL after use

So that goroutines are stopped and resources released

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* BenchmarkLoadWAL: make series IDs co-prime with #workers

Series are distributed across workers by taking the modulus of the
ID with the number of workers, so multiples of 100 are a poor choice.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* BenchmarkLoadWAL: simulate mmapped chunks

Real Prometheus cuts chunks every 120 samples, then skips those samples
when re-reading the WAL. Simulate this by creating a single mapped chunk
for each series, since the max time is all the reader looks at.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* Fix comment

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* Remove series map from processWALSamples()

The locks that is commented to reduce contention in are now sharded
32,000 ways, so won't be contended. Removing the map saves memory and
goes just as fast.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* loadWAL: Cache the last mmapped chunk time

So we can skip calling append() for samples it will reject.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* Improvements from code review

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* Full stops and capitals on comments

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* Cache max time in both places mmappedChunks is updated

Including refactor to extract function `setMMappedChunks`, to reduce
code duplication.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>

* Update head min/max time when mmapped chunks added

This ensures we have the correct values if no WAL samples are added for
that series.

Note that `mSeries.maxTime()` was always `math.MinInt64` before, since
that function doesn't consider mmapped chunks.

Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
2021-08-10 14:53:31 +05:30
.circleci fixes yamllint errors 2021-06-12 12:47:47 +02:00
.github Merge pull request #8985 from prometheus/richih/pr_template 2021-07-26 18:03:30 +02:00
cmd Snapshot in-memory chunks on shutdown for faster restarts (#7229) 2021-08-06 17:51:01 +01:00
config HostNetworkHost -> HostNetworkingHost 2021-08-03 05:58:49 -06:00
console_libraries Make React UI the default, keep old UI under /classic (#8142) 2020-11-03 14:51:48 +01:00
consoles Cleaned up a little bit of HTML 2021-07-28 20:12:06 -04:00
discovery Fix kuma_sd targetgroup reporting (#9157) 2021-08-06 01:29:15 +02:00
docs Rename links 2021-08-06 21:54:44 -06:00
documentation optimize Linode SD by polling for event changes during refresh (#8980) 2021-08-04 12:05:49 +02:00
notifier Fix: Use json.Unmarshal() instead of json.Decoder (#9033) 2021-07-02 09:38:14 +01:00
pkg Return error on NaN and Inf timestamps for OpenMetrics parser 2021-06-28 20:55:04 -04:00
prompb Add Exemplar Remote Write support (#8296) 2021-05-06 13:53:52 -07:00
promql Add present_over_time (#9097) 2021-07-29 12:38:11 +02:00
rules fixes yamllint errors 2021-06-12 12:47:47 +02:00
scrape scrape: fix 'target_limit exceeded error' when reloading conf with 0 2021-07-27 17:34:22 +05:30
scripts Revert "Update sync PRs" (#8998) 2021-06-27 00:29:56 +02:00
storage Remove Individual Data Type Caps in Per-shard Buffering for Remote Write (#8921) 2021-08-09 15:20:53 -06:00
template Added external URL access 2021-05-30 23:35:26 -04:00
tsdb Optimise WAL loading by removing extra map and caching min-time (#9160) 2021-08-10 14:53:31 +05:30
util Extract and export GetFQDN() 2021-07-21 12:55:02 -04:00
web Update UI dependencies 2021-07-29 09:11:14 +02:00
.dockerignore Add image build for ppc64le architecture 2020-04-06 18:03:58 -03:00
.gitignore add changes per comments, fix tests 2021-03-20 12:38:30 -07:00
.gitpod.yml fixes yamllint errors 2021-06-12 12:47:47 +02:00
.golangci.yml Revert "Fix logging after the move to go-kit/log (#9021)" 2021-07-27 07:37:03 -04:00
.promu.yml Use CircleCI parallelism 2021-03-21 12:17:20 +01:00
.yamllint avoid glob pattern for key-duplicates 2021-06-12 13:12:47 +02:00
CHANGELOG.md Merge release-2.28 back into main (#9035) 2021-07-01 18:02:13 +02:00
CODE_OF_CONDUCT.md Improve repo sync script 2020-06-17 17:12:36 +02:00
CONTRIBUTING.md Replace freenode with libera.chat 2021-06-13 00:36:28 +02:00
Dockerfile Fix docker image build 2020-12-16 21:21:22 +01:00
go.mod Update Go dependencies 2021-07-29 09:11:04 +02:00
go.sum Update Go dependencies 2021-07-29 09:11:04 +02:00
LICENSE Clean up license issues. 2015-01-21 20:07:45 +01:00
MAINTAINERS.md Add @dgl as maintainer of promtool 2021-03-08 20:38:57 +01:00
Makefile increase golang ci lint timeout 2021-06-12 11:43:34 +02:00
Makefile.common Only run if yamllint is installed 2021-06-25 08:03:58 -04:00
NOTICE Add new codemirror-promql-based expression editor (#8634) 2021-03-23 23:55:52 +01:00
README.md Replace godoc.org links 2021-06-17 07:18:51 -04:00
RELEASE.md Fix bold formatting bug in RELEASE.md (#8962) 2021-06-18 15:41:02 +02:00
SECURITY.md Add SECURITY.md file (#8292) 2021-01-09 09:58:53 +01:00
VERSION Merge release-2.28 back into main (#8975) 2021-06-22 00:59:31 +02:00

Prometheus

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Visit prometheus.io for the full documentation, examples and guides.

Prometheus, a Cloud Native Computing Foundation project, is a systems and service monitoring system. It collects metrics from configured targets at given intervals, evaluates rule expressions, displays the results, and can trigger alerts when specified conditions are observed.

The features that distinguish Prometheus from other metrics and monitoring systems are:

  • A multi-dimensional data model (time series defined by metric name and set of key/value dimensions)
  • PromQL, a powerful and flexible query language to leverage this dimensionality
  • No dependency on distributed storage; single server nodes are autonomous
  • An HTTP pull model for time series collection
  • Pushing time series is supported via an intermediary gateway for batch jobs
  • Targets are discovered via service discovery or static configuration
  • Multiple modes of graphing and dashboarding support
  • Support for hierarchical and horizontal federation

Architecture overview

Install

There are various ways of installing Prometheus.

Precompiled binaries

Precompiled binaries for released versions are available in the download section on prometheus.io. Using the latest production release binary is the recommended way of installing Prometheus. See the Installing chapter in the documentation for all the details.

Docker images

Docker images are available on Quay.io or Docker Hub.

You can launch a Prometheus container for trying it out with

$ docker run --name prometheus -d -p 127.0.0.1:9090:9090 prom/prometheus

Prometheus will now be reachable at http://localhost:9090/.

Building from source

To build Prometheus from source code, first ensure that have a working Go environment with version 1.14 or greater installed. You also need Node.js and Yarn installed in order to build the frontend assets.

You can directly use the go tool to download and install the prometheus and promtool binaries into your GOPATH:

$ GO111MODULE=on go get github.com/prometheus/prometheus/cmd/...
$ prometheus --config.file=your_config.yml

However, when using go get to build Prometheus, Prometheus will expect to be able to read its web assets from local filesystem directories under web/ui/static and web/ui/templates. In order for these assets to be found, you will have to run Prometheus from the root of the cloned repository. Note also that these directories do not include the new experimental React UI unless it has been built explicitly using make assets or make build.

An example of the above configuration file can be found here.

You can also clone the repository yourself and build using make build, which will compile in the web assets so that Prometheus can be run from anywhere:

$ mkdir -p $GOPATH/src/github.com/prometheus
$ cd $GOPATH/src/github.com/prometheus
$ git clone https://github.com/prometheus/prometheus.git
$ cd prometheus
$ make build
$ ./prometheus --config.file=your_config.yml

The Makefile provides several targets:

  • build: build the prometheus and promtool binaries (includes building and compiling in web assets)
  • test: run the tests
  • test-short: run the short tests
  • format: format the source code
  • vet: check the source code for common errors
  • assets: build the new experimental React UI

Building the Docker image

The make docker target is designed for use in our CI system. You can build a docker image locally with the following commands:

$ make promu
$ promu crossbuild -p linux/amd64
$ make npm_licenses
$ make common-docker-amd64

NB if you are on a Mac, you will need gnu-tar.

React UI Development

For more information on building, running, and developing on the new React-based UI, see the React app's README.md.

More information

Contributing

Refer to CONTRIBUTING.md

License

Apache License 2.0, see LICENSE.