WARNING: This is pre-release software, and is not intended for use until a stable release.

M3DB

A time series database.

Documentation: https://m3db.github.io/m3db/

Notes for developers

Test it out

(For a fully comprehsensive getting started guide, see our single node how-to).

Starting a node

# to build a local m3dbnode process
make m3dbnode

# run it with the sample configuration
./bin/m3dbnode -f ./src/dbnode/config/m3dbnode-local.yml

To cross-compile and build for Linux AMD64 build with make m3dbnode-linux-amd64.

Test RPC

To test out some of the functionality of M3DB there are some user friendly HTTP JSON APIs that you can use. These use the DB node cluster service endpoints.

Note: performance sensitive users are expected to use the more performant endpoints via either the Go src/dbnode/client/Session API, or the GRPC endpoints exposed via src/coordinator.

Write a datapoint

curl http://localhost:9003/writetagged -s -X POST -d '{
  "namespace": "default",
  "id": "foo",
  "tags": [
    {
      "name": "city",
      "value": "new_york"
    },
    {
      "name": "endpoint",
      "value": "/request"
    }
  ],
  "datapoint": {
    "timestamp":'"$(date +"%s")"',
    "value": 42.123456789
  }
}'

Query for reverse indexed time series data

curl http://localhost:9003/query -s -X POST -d '{
  "namespace": "default",
  "query": {
    "regexp": {
      "field": "city",
      "regexp": ".*"
    }
  },
  "rangeStart": 0,
  "rangeEnd":'"$(date +"%s")"'
}' | jq .

Building with Docker

A Dockerfile is included for both development and production deployment purposes. It uses a multi-stage build in order to produce a lightweight production image from a single Dockerfile. Accordingly, it requires Docker 17.05 or later to build.

docker build -t m3dbnode:$(git rev-parse head) .
docker run --name m3dbnode m3dbnode:$(git rev-parse head)

If you wish to build an image with the source code included you can stop the build after the builder stage:

docker build -t m3dbnode:$(git rev-parse head) --target builder .

Configuration

The default Docker image will start a single m3dbnode process with an embedded etcd instance to mimic a production environment. If you would like to further customize the configuration, you must provide your own and mount it into the container:

docker run --name m3dbnode -v /host/config.yml:/etc/m3dbnode/myconfig.yml m3dbnode:tag -f /etc/m3dbnode/myconfig.yml

Building the Docs

The docs folder contains our documentation in Markdown files. These Markdown files are built into a static site using mkdocs with the mkdocs-material theme. Building the docs using our predefined make targets requires a working Docker installation:

# generate the docs in the `site/` directory
make docs-build

# build docs and serve on localhost:8000 (with live reload)
make docs-serve

# build the docs and auto-push to the `gh-pages` branch
make docs-deploy

---

This project is released under the Apache License, Version 2.0.