/
types.go
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/
types.go
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// Copyright (c) 2021 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// Package promremote implements storage interface backed by Prometheus remote write capable endpoints.
package promremote
import (
"github.com/uber-go/tally"
"go.uber.org/zap"
"github.com/m3db/m3/src/dbnode/client"
"github.com/m3db/m3/src/query/storage/m3"
"github.com/m3db/m3/src/query/storage/m3/storagemetadata"
"github.com/m3db/m3/src/x/ident"
xhttp "github.com/m3db/m3/src/x/net/http"
)
// Options for storage.
type Options struct {
endpoints []EndpointOptions
httpOptions xhttp.HTTPClientOptions
scope tally.Scope
logger *zap.Logger
}
// Namespaces returns M3 namespaces from endpoint opts.
func (o Options) Namespaces() m3.ClusterNamespaces {
namespaces := make(m3.ClusterNamespaces, 0, len(o.endpoints))
for _, endpoint := range o.endpoints {
namespaces = append(namespaces, newClusterNamespace(endpoint))
}
return namespaces
}
// EndpointOptions for single prometheus remote write capable endpoint.
type EndpointOptions struct {
name string
address string
attributes storagemetadata.Attributes
downsampleOptions *m3.ClusterNamespaceDownsampleOptions
}
func newClusterNamespace(endpoint EndpointOptions) m3.ClusterNamespace {
return promRemoteNamespace{
// NB(antanas): NewOptions validates endpoint name to be unique in the list of endpoints.
nsID: ident.StringID(endpoint.name),
options: m3.NewClusterNamespaceOptions(endpoint.attributes, endpoint.downsampleOptions),
}
}
type promRemoteNamespace struct {
nsID ident.ID
options m3.ClusterNamespaceOptions
}
func (e promRemoteNamespace) NamespaceID() ident.ID {
return e.nsID
}
func (e promRemoteNamespace) Options() m3.ClusterNamespaceOptions {
return e.options
}
func (e promRemoteNamespace) Session() client.Session {
// NB(antanas): should never be called since there is no m3db backend in this case.
panic("M3DB client session can't be used when using prom remote storage backend")
}