#563 Kamon on Lagom projects

[ihostage]

Port of kamon-io/kamon-play#56

[thanidev]

Hi @ihostage any update on this?

[ihostage]

Hi @thanidev! I wait for the review of maintainers 😄

[SimunKaracic]

Yeah this one fell through the cracks :(
I promise to give it a look next week

[SimunKaracic]

Thanks for the patience, but it looks like you'll have to wait a bit more.
The reason this PR is waiting is: we don't know a lot about Lagom.

Before we can merge this, we'd have to try it (Lagom) out, see how other people are using it, make sure the metrics make sense and are named/tagged correctly, etc...

Don't worry, we're going to give Lagom some love in the future, but we have some other priorities right now.

[thanidev]

Thanks for the patience, but it looks like you'll have to wait a bit more.

If Kamon support all akka projects like Play or Lagom, it will be nice..

[ihostage]

Together with kamon-prometheus the metrics for one breaker looks like this:

# HELP lagom_cb_count_total Count of calls of Lagom Circuit Breakers
# TYPE lagom_cb_count_total counter
lagom_cb_count_total{component="lagom",success="true",cb="circuit-breaker-name"} 4.0
lagom_cb_count_total{cb="circuit-breaker-name",fail="timeout",component="lagom",success="false"} 0.0
lagom_cb_count_total{component="lagom",success="false",cb="circuit-breaker-name"} 0.0
lagom_cb_count_total{cb="circuit-breaker-name",fail="open",component="lagom",success="false"} 0.0

# HELP lagom_cb_state State of Lagom Circuit Breakers
# TYPE lagom_cb_state gauge
lagom_cb_state{component="lagom",cb="circuit-breaker-name"} 0.0

# HELP lagom_cb_latency_seconds Latency of Lagom Circuit Breakers
# TYPE lagom_cb_latency_seconds histogram
lagom_cb_latency_seconds_bucket{le="0.005",component="lagom",cb="circuit-breaker-name"} 0.0
lagom_cb_latency_seconds_bucket{le="0.01",component="lagom",cb="circuit-breaker-name"} 0.0
lagom_cb_latency_seconds_bucket{le="0.025",component="lagom",cb="circuit-breaker-name"} 0.0
lagom_cb_latency_seconds_bucket{le="0.05",component="lagom",cb="circuit-breaker-name"} 0.0
lagom_cb_latency_seconds_bucket{le="0.075",component="lagom",cb="circuit-breaker-name"} 0.0
lagom_cb_latency_seconds_bucket{le="0.1",component="lagom",cb="circuit-breaker-name"} 2.0
lagom_cb_latency_seconds_bucket{le="0.25",component="lagom",cb="circuit-breaker-name"} 3.0
lagom_cb_latency_seconds_bucket{le="0.5",component="lagom",cb="circuit-breaker-name"} 3.0
lagom_cb_latency_seconds_bucket{le="0.75",component="lagom",cb="circuit-breaker-name"} 3.0
lagom_cb_latency_seconds_bucket{le="1.0",component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_bucket{le="2.5",component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_bucket{le="5.0",component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_bucket{le="7.5",component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_bucket{le="10.0",component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_bucket{le="+Inf",component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_count{component="lagom",cb="circuit-breaker-name"} 4.0
lagom_cb_latency_seconds_sum{component="lagom",cb="circuit-breaker-name"} 1.099431936

# HELP lagom_cb_timer_seconds Timer of calls of Lagom Circuit Breakers
# TYPE lagom_cb_timer_seconds histogram
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.005",component="lagom",success="true"} 0.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.01",component="lagom",success="true"} 0.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.025",component="lagom",success="true"} 0.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.05",component="lagom",success="true"} 0.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.075",component="lagom",success="true"} 0.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.1",component="lagom",success="true"} 2.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.25",component="lagom",success="true"} 3.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.5",component="lagom",success="true"} 3.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="0.75",component="lagom",success="true"} 3.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="1.0",component="lagom",success="true"} 4.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="2.5",component="lagom",success="true"} 4.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="5.0",component="lagom",success="true"} 4.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="7.5",component="lagom",success="true"} 4.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="10.0",component="lagom",success="true"} 4.0
lagom_cb_timer_seconds_bucket{cb="circuit-breaker-name",le="+Inf",component="lagom",success="true"} 4.0
lagom_cb_timer_seconds_count{component="lagom",success="true",cb="circuit-breaker-name"} 4.0
lagom_cb_timer_seconds_sum{component="lagom",success="true",cb="circuit-breaker-name"} 1.099431936