Casspoke is a blackbox probe measuring Apache Cassandra® availibility and latency. It exposes metrics throught an prometheus friendly endpoint. The probe will connect to cassandra and:
- Listen for topology change (like a node changing state from UN to DN) and expose the availibility throught metric
- Send periodically to each node write and read requests to the
system_traces.eventstable in order to measure latency to this node
To start the application
java -jar casspoke.jar config.yml
The prometheus endpoint is available at http://localhost:{httpServerPort} (8080 by default)
For the configuration take a loot at https://github.com/criteo/casspoke/blob/master/config.yml
There are 2 main sections: {app, discovery}
app:
# A measurement should be taken every x seconds
measurementPeriodInSec: 10
# Operations timeout
timeoutInSec: 60
# Discovery of the cluster should be re-done every x seconds (useful if you use consul)
refreshDiscoveryPeriodInSec: 600
# Prometheus http server port endpoint
httpServerPort: 8080
# Optional: username used to auth to cassandra
# username: user
# Optional: password used to auth to cassandra
# password: password
discovery:
dns:
- clustername: cstars01
host: cstars01-seed1.fqdn:9042,cstars01-seed2.fqdn:9042
- clustername: cstars02
host: cstars02-seed1.fqdn:9042,cstars02-seed2.fqdn:9042
# consul:
# host: consul.service.consul
# port: 8500
# timeoutInSec: 10
# readConsistency: STALE
# tags:
# - cluster=cstars01
# #- cassandra
At the root of the project, just do a
gradle build
you will find the jar in build/libs directory
docker run --rm --net=host -v $(pwd)/config.yml:/opt/casspoke/config.yml criteord/casspoke:1.2
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