joyent-portal/spikes/metrics-service/readme.md

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2016-11-04 19:09:58 +02:00
# metrics-service
> A service which produces random streams of data (firehose) of interpretable metric information for various subsystems that can or will be pulled out from a container. These are currently defined in [RFD-0037](https://github.com/joyent/rfd/blob/master/rfd/0037/README.md#default-metric-keys).
This spike's purpose was to find the best pattern to expose such metrics service with mock data.
## http1
+ very simple API to push data from the server to the client
+ plain HTTP
- requires a connection to each container - because it's not bidirectional, we can't subscribe to more containers on-demand
## http2
+ very simple API to push data from the server to the client
+ multiplexing
- push doesn't really help us, because it's only useful for static resources
## graphql
+ common interface between all data resources
+ filter received data
- api not finalised yet
- api not documented
## ws (with [nes](https://github.com/hapijs/nes))
+ strong integration with [Hapi](https://github.com/hapijs/hapi)
+ allow to subscribe and unsubscribe on-demand on a single connection
- some networks might require fallback to pooling