Docker Stats Receiver is not enabled

[pavankrish123]

Describe the bug
This is related to PR #495. It looks like docker stats receiver is not enabled in cmd/components.go . I am not sure if it was intentional or we missed the the below logic by accident. Please enable the receiver.

diff --git a/cmd/otelcontribcol/components.go b/cmd/otelcontribcol/components.go
index 6f2a3109..81cc726f 100644
--- a/cmd/otelcontribcol/components.go
+++ b/cmd/otelcontribcol/components.go
@@ -52,6 +52,8 @@ import (
        "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/splunkhecreceiver"
        "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/statsdreceiver"
        "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/wavefrontreceiver"
+       "github.com/open-telemetry/opentelemetry-collector-contrib/receiver/dockerstatsreceiver"
+
 )
 
 func components() (component.Factories, error) {
@@ -90,6 +92,7 @@ func components() (component.Factories, error) {
                statsdreceiver.NewFactory(),
                awsxrayreceiver.NewFactory(),
                splunkhecreceiver.NewFactory(),
+               dockerstatsreceiver.NewFactory(),
        }
        for _, rcv := range factories.Receivers {
                receivers = append(receivers, rcv)

Steps to reproduce

The build from the latest commit when loaded with the below config
./otelcontribcol --config otel-config.yml

throws the following error

otel-collector_1  | {"level":"info","ts":1599247061.6296563,"caller":"service/telemetry.go:106","msg":"Serving Prometheus metrics","address":":8888","legacy_metrics":false,"new_metrics":true,"level":3,"service.instance.id":"33fd869b-e9cc-4ae7-8bfc-9b1272906c1f"}
otel-collector_1  | {"level":"info","ts":1599247061.6300523,"caller":"service/service.go:277","msg":"Loading configuration..."}
otel-collector_1  | Error: cannot load configuration: unknown receivers type "docker_stats" for docker_stats
otel-collector_1  | 2020/09/04 19:17:41 application run finished with error: cannot load configuration: unknown receivers type "docker_stats" for docker_stats

What did you expect to see?

OTel Controller comes up fine and docker stats shows up as expected.

What did you see instead?
OTel Collector stops because it cannot recognize docker_stats receiver

What version did you use?
Version: (commit: c1463db)

What config did you use?

receivers:
  docker_stats:
    endpoint:
    collection_interval: 60s
    provide_per_core_cpu_metrics: true

exporters:
  file:
    path: ./filename.json

service:
  pipelines:
    metrics:
      receivers: [docker_stats]
      exporters: [file]

Environment
Compiler(if manually compiled): Ran make docker-otelcontribcol

Additional context
I posted the diff in the components.go that makes the collector work. Happy to submit a PR but I wanted to make sure if docker_stats receiver was not included purposefully

PS: Great Addition to the list of receivers!

[rmfitzpatrick]

@pavankrish123 thank you for your report. The docker stats receiver is being delivered in stages, and a PR with the final dynamic functionality and component addition will be opened shortly. I apologize for not adding a caveat to its readme explaining that it is still in active development, and only the current changelog details this: https://github.com/open-telemetry/opentelemetry-collector-contrib/blob/master/CHANGELOG.md#unreleased

[pavankrish123]

Thanks @rmfitzpatrick - I am closing this issue.