nerve-tools

Tools for working with nerve. This repo builds as a dh_virtualenv package, and provides three entry points:

configure_nerve

Determines the list of services running on the local box (scheduled by Paasta or manually configured), writes out a nerve config, and restarts nerve.

updown_service

De-register a service. Tells hacheck to fail healthchecks for a service, and waits until the deregistration has propagated to the local synapse.

clean_nerve

Clean up orphaned ZK nodes left by nerve.

Configuration

This package uses environment_tools to reason about location hierarchies; you must have a location_types.json and location_mapping.json describing your environments.

You will also need zookeeper topology files, at /nail/etc/zookeeper_discovery/infrastructure/{superregion}.yaml. This must parse as a list of servers; each server is represented as a list of [hostname, port].

For example:

---
 - ["hostname1", 2181]
 - ["hostname2", 2181]
 - ["hostname3", 2181]

See the Paasta documentation for per-service info.