Make bridgestrap export metrics
If we end up using statsd/graphite to keep track of rdsys metrics, it's trivial to add bridgestrap metrics too. All we have to do is to use the statsd-client library and log whatever we want to add to statsd's time series. Things that come to mind:
- Number of failed/successful tests.
- Execution time of Tor tests.
- Execution time of Web/API requests.
- Number of cache hits/misses.
Adding metrics is very easy, e.g.:
This line increments the counter for bridgestrap/tor/num_dysfunctional_bridges.