289b30715d
This commit converts the dependency management from Godeps to the vendor folder, also switching the tool from godep to trash. Since the upstream tool lacks a few features proposed via a few PRs, until those PRs are merged in (if), use github.com/karalabe/trash. You can update dependencies via trash --update. All dependencies have been updated to their latest version. Parts of the build system are reworked to drop old notions of Godeps and invocation of the go vet command so that it doesn't run against the vendor folder, as that will just blow up during vetting. The conversion drops OpenCL (and hence GPU mining support) from ethash and our codebase. The short reasoning is that there's noone to maintain and having opencl libs in our deps messes up builds as go install ./... tries to build them, failing with unsatisfied link errors for the C OpenCL deps. golang.org/x/net/context is not vendored in. We expect it to be fetched by the user (i.e. using go get). To keep ci.go builds reproducible the package is "vendored" in build/_vendor.
4.3 KiB
go-metrics
Go port of Coda Hale's Metrics library: https://github.com/dropwizard/metrics.
Documentation: http://godoc.org/github.com/rcrowley/go-metrics.
Usage
Create and update metrics:
c := metrics.NewCounter()
metrics.Register("foo", c)
c.Inc(47)
g := metrics.NewGauge()
metrics.Register("bar", g)
g.Update(47)
r := NewRegistry()
g := metrics.NewRegisteredFunctionalGauge("cache-evictions", r, func() int64 { return cache.getEvictionsCount() })
s := metrics.NewExpDecaySample(1028, 0.015) // or metrics.NewUniformSample(1028)
h := metrics.NewHistogram(s)
metrics.Register("baz", h)
h.Update(47)
m := metrics.NewMeter()
metrics.Register("quux", m)
m.Mark(47)
t := metrics.NewTimer()
metrics.Register("bang", t)
t.Time(func() {})
t.Update(47)
Register() is not threadsafe. For threadsafe metric registration use GetOrRegister:
t := metrics.GetOrRegisterTimer("account.create.latency", nil)
t.Time(func() {})
t.Update(47)
Periodically log every metric in human-readable form to standard error:
go metrics.Log(metrics.DefaultRegistry, 5 * time.Second, log.New(os.Stderr, "metrics: ", log.Lmicroseconds))
Periodically log every metric in slightly-more-parseable form to syslog:
w, _ := syslog.Dial("unixgram", "/dev/log", syslog.LOG_INFO, "metrics")
go metrics.Syslog(metrics.DefaultRegistry, 60e9, w)
Periodically emit every metric to Graphite using the Graphite client:
import "github.com/cyberdelia/go-metrics-graphite"
addr, _ := net.ResolveTCPAddr("tcp", "127.0.0.1:2003")
go graphite.Graphite(metrics.DefaultRegistry, 10e9, "metrics", addr)
Periodically emit every metric into InfluxDB:
NOTE: this has been pulled out of the library due to constant fluctuations in the InfluxDB API. In fact, all client libraries are on their way out. see issues #121 and #124 for progress and details.
import "github.com/vrischmann/go-metrics-influxdb"
go influxdb.Influxdb(metrics.DefaultRegistry, 10e9, &influxdb.Config{
Host: "127.0.0.1:8086",
Database: "metrics",
Username: "test",
Password: "test",
})
Periodically upload every metric to Librato using the Librato client:
Note: the client included with this repository under the librato package
has been deprecated and moved to the repository linked above.
import "github.com/mihasya/go-metrics-librato"
go librato.Librato(metrics.DefaultRegistry,
10e9, // interval
"example@example.com", // account owner email address
"token", // Librato API token
"hostname", // source
[]float64{0.95}, // percentiles to send
time.Millisecond, // time unit
)
Periodically emit every metric to StatHat:
import "github.com/rcrowley/go-metrics/stathat"
go stathat.Stathat(metrics.DefaultRegistry, 10e9, "example@example.com")
Maintain all metrics along with expvars at /debug/metrics:
This uses the same mechanism as the official expvar
but exposed under /debug/metrics, which shows a json representation of all your usual expvars
as well as all your go-metrics.
import "github.com/rcrowley/go-metrics/exp"
exp.Exp(metrics.DefaultRegistry)
Installation
go get github.com/rcrowley/go-metrics
StatHat support additionally requires their Go client:
go get github.com/stathat/go
Publishing Metrics
Clients are available for the following destinations:
- Librato - https://github.com/mihasya/go-metrics-librato
- Graphite - https://github.com/cyberdelia/go-metrics-graphite
- InfluxDB - https://github.com/vrischmann/go-metrics-influxdb
- Ganglia - https://github.com/appscode/metlia
- Prometheus - https://github.com/deathowl/go-metrics-prometheus