otlpmetrichttp not tagged with v0.21.0

[seanschade]

Description

It looks like the otlpmetrichttp module wasn't tagged with v0.21.0.
Go will pull in the latest, but I need to pin to a specific version.

Environment

• OS: [macOS]
• Architecture: [amd64, darwin]
• Go Version: [1.16]
• opentelemetry-go version: [v0.21.0]

Steps To Reproduce

1. go get go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.21.0
2. See error:

go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.21.0: reading go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp/exporters/otlp/otlpmetric/otlpmetrichttp/go.mod at revision exporters/otlp/otlpmetric/otlpmetrichttp/v0.21.0: unknown revision exporters/otlp/otlpmetric/otlpmetrichttp/v0.21.0

Expected behavior

I would expect all modules to be tagged with a version.

[Aneurysm9]

This module was added after the v0.21.0 release and will be included in the v0.22.0 release I expect will be shipped next week.

[seanschade]

Thanks @Aneurysm9 right now I am having a difficult time using this package in conjunction with otlpmetricgrpc.

# go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:91:8: cfg.MaxAttempts undefined (type otlpconfig.Config has no field or method MaxAttempts)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:92:6: cfg.MaxAttempts undefined (type otlpconfig.Config has no field or method MaxAttempts)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:94:8: cfg.MaxAttempts undefined (type otlpconfig.Config has no field or method MaxAttempts)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:95:6: cfg.MaxAttempts undefined (type otlpconfig.Config has no field or method MaxAttempts)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:97:8: cfg.Backoff undefined (type otlpconfig.Config has no field or method Backoff)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:98:6: cfg.Backoff undefined (type otlpconfig.Config has no field or method Backoff)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:160:30: d.generalCfg.MaxAttempts undefined (type otlpconfig.Config has no field or method MaxAttempts)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:177:50: d.generalCfg.Backoff undefined (type otlpconfig.Config has no field or method Backoff)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/client.go:186:85: d.generalCfg.MaxAttempts undefined (type otlpconfig.Config has no field or method MaxAttempts)
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/options.go:88:23: undefined: otlpconfig.WithMaxAttempts
../../../../go/pkg/mod/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp@v0.0.0-20210708203527-484258eb36a7/options.go:88:23: too many errors

[emilgelman]

@seanschade experiencing the same.
oltpmetrichttp is currently unusable as otlpconfig.Config is missing the HTTP configurations in v0.0.21:
https://github.com/open-telemetry/opentelemetry-go/blob/exporters/otlp/otlpmetric/v0.21.0/exporters/otlp/otlpmetric/internal/otlpconfig/options.go

[MrAlias]

Resolved with #2101