dynconf

This Go package provides a dynamic service configuration backed by etcd, so there should be no need to redeploy a service to change its settings.

For example, project Curiosity expects settings such as velocity = 10 and is_camera_enabled = true. Let's save them in etcd with a path prefix configs/curiosity/.

$ brew install etcd
$ etcd
$ etcdctl put configs/curiosity/velocity 10
OK
$ etcdctl put configs/curiosity/is_camera_enabled true
OK

On the service side the settings are fetched from the same path.

const defaultVelocity = 5

c, err := dynconf.New("configs/curiosity")
if err != nil {
	// No worries if etcd is down, the rover can still roll with the default settings.
}
defer c.Close()

rover.SetVelocity(
	c.Int("velocity", defaultVelocity),
)