cryptowat_exporter

A Prometheus exporter to fetch values from cryptowat.ch written in Go.

Installation

Binaries can be downloaded from the Github releases page. A Docker image hosted on Dockerhub is also available.

Building yourself is rather easy, just install golang and make and run:

make

To build a Docker image yourself, adjust the Docker architectures in the Makefile and run:

make docker

To use the pre-built image just pull it:

docker pull nbarrientos/cryptowat_exporter

Usage

./cryptowat_exporter

or with Docker (self-built):

sudo docker run -d --name cryptowat_exporter -e "TZ=Europe/Zurich" --user yourchoice -p 9745:9745 prom/cryptowat_exporter:master

or pre-built:

sudo docker run -d --name cryptowat_exporter -e "TZ=Europe/Zurich" --user yourchoice -p 9745:9745 nbarrientos/cryptowat_exporter

Then visit http://localhost:9745/metrics

Please note that publishing the exposed ports is optional. For instance if you do IPv6 global address allocation at container start time you might not want to pass -p at all.

Configuration

The exporter takes some command line parameters that allow configuring a few things:

• --cryptowat.exchanges: Comma separated list of exchanges to scrape (default: bitstamp,kraken,coinbase-pro)
• --cryptowat.pairs: Comma separated list of pairs to scrape (default: btcusd,ltcusd)
• --cryptowat.cacheseconds: Number of seconds to cache values for (default: 300)
• --web.listen-address: Address and port to listen on (default: :9745)

Docker users can customise the list of exchanges, pairs and cache lifetime using the following environment variables:

• CRYPTOWAT_EXCHANGES
• CRYPTOWAT_PAIRS
• CRYPTOWAT_CACHESECONDS

See the Dockerfile for more details.

Generated metrics

All crypto-related metrics generated by the exporter are prefixed with crypto_. At the moment the exporter scrapes the last known value and daily highs, lows and changes (absolute values and percents).

Example:

...
# HELP crypto_change_24h_ratio The 24h change ratio in a given market
# TYPE crypto_change_24h_ratio gauge
crypto_change_24h_ratio{exchange="bitstamp",pair="btcusd"} 0.0009857005287352
crypto_change_24h_ratio{exchange="bitstamp",pair="ltcusd"} -0.011901983663944
crypto_change_24h_ratio{exchange="kraken",pair="btcusd"} 0.0007039934596737
crypto_change_24h_ratio{exchange="kraken",pair="ltcusd"} -0.0123571928188389
# HELP crypto_currency The last known trading value in a given market in the currency of the RHS of the pair
# TYPE crypto_currency gauge
crypto_currency{exchange="bitstamp",pair="btcusd"} 8814.6
crypto_currency{exchange="bitstamp",pair="ltcusd"} 42.34
crypto_currency{exchange="kraken",pair="btcusd"} 8813.1
crypto_currency{exchange="kraken",pair="ltcusd"} 42.36
...

Prometheus configuration

scrape_configs:
  - job_name: cryptowat
    static_configs:
      - targets: ['localhost:9745']

You can poll as often as you want but, by default, the exporter only refreshes the cached values every fifteen minutes. This can be changed using --cryptowat.cacheseconds but bear in mind that Cryptowat.ch's API does rate limiting.

Example Grafana visualisations