rajadeepan / go-archaius

A dynamic configuration management tool for both local file and distributed configuration system

go-archaius

This is a dynamic configuration management tool for Go-Chassis which helps in configuration management for micro-services developed using Go-Chassis.

Meanwhile go-archaius is also decoupled with go chassis, it can be used in any projects.

The main objective of this project is to pull or sync the configuration from config-sources for a particular micro-service.

Why use go-archaius

it is hard to manage configurations in a distributed system. archaius can integrate with them. Tt keeps watching configuration changes, and fire change event if there is changes. so that you can easily implement a service which has hot-reconfiguration features. when you need to change configurations. you service has zero-down time

Sources

Go-Archaius supports multiple sources for the configuration.

1. Command Line Sources - You can give the configurations key and values in the command lines arguments while starting the microservice.
2. Environment Variable Sources - You can specify the sources of conifguration in Environment variable.
3. External Sources - You can also specify the configuration sources to be some external config server from where the client can pull the configuration.
4. Files Sources - You can specify some specific files from where client can read the configuration for the microservices.

You can specify multiple sources at a same time. go-archaius keeps all the sources marked with their precedence, in case if two sources have same config then source with higher precendence will be selected.

Event management

You can register event listener by key(exactly match or pattern match), to watch value change.

Refresh Mechanism

Go-Archaius client support 2 types of refresh mechanism:

1. Web-Socket Based - In this client makes an web socket connection with the config server and keeps getting an events whenever any data changes.

refreshMode: 0

2. Pull Configuration - In this type client keeps polling the configuration from the config server at regular intervals.

refreshMode: 1